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Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
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1

Substation voltage upgrading  

SciTech Connect

This report addresses specific issues to support sound yet not unduly conservative uprating practices for substations. The main parts of the report cover the insulation withstand and overvoltage protection aspects, environmental measurements, reliability criteria, and industry experience. First the insulation design concerns are addressed. Substation stress by a backflashover of the line insulation due to lightning in the vicinity of the substation is recognized as a critical stress. A representative part of a 550 kV BIL substation was erected at the EPRI High Voltage Transmission Research Center, where also a special test circuit was assembled to produce a fast front, slow tail (0.2/200 {mu}s) wave. The substation as well as some special configurations were tested for line-to-ground and line-to-line withstand. Computer studies were performed to complement the test results. A number of important conclusions was reached. The most prominent result in that the high frequency oscillations, as caused by reflections within the substation, do not effect the Critical Flashover Voltage (CFO). The present practice, based on the highest peak is therefore very conservative. The slow tail of the wave appears to dictate the CFO. An arrester model for computer studies to represent very fast as well as slow phenomena was derived. It is based on full scale arrester test data, made available in this project. The computer program to calculate arrester model parameters is also a part of the report. The electric environmental measurements are reported for the tested substation at the HVTRC and for the uprated substation of Public Service Company of Colorado, both before and after the uprating. The performance is satisfactory when corona free hardware is used. Insulation design criteria are analyzed based on substation reliability, the system viewpoint and consequences of the failure. Utility experience with uprated substations is reviewed.

Panek, J.; Elahi, H.; Lux, A.; Imece, A.F. (General Electric Co., Schenectady, NY (United States). Power Systems Engineering Dept.); LaPanse, R.A.; Stewart, J.R. (Public Service Co. of Colorado, Denver, CO (United States))

1992-04-01T23:59:59.000Z

2

Substation voltage upgrading  

SciTech Connect

Substation voltage uprating, i.e., conversion of a substation from a lower rated voltage to a higher rated voltage without a complete substation rebuild, can lead to excellent economic benefits. Utilization of the old substation layout and/or the existing equipment, to some extent, is the practical objective of such an uprating. The objective of this project was to assess the opportunities for substation uprating in the industry, to establish feasibility for such uprating and to study methods for accomplishing it. The final aim of the project was to provide guidance to utilities interested in uprating. 56 refs., 41 figs., 18 tabs.

Panek, J.; Elahi, H.; Sublich, M. (General Electric Co., Schenectady, NY (USA). Systems Development and Engineering Dept.)

1989-08-01T23:59:59.000Z

3

230 kV operation of a substation designed for 115 kV by controlling voltage transients  

SciTech Connect

Arresters applied at the terminals of gas insulated substations have been used successfully for protection from switching and lightning surges. This arrester application for gas insulated substations permits the use of lower insulation levels and therefore more economical substations. In principle, the same technique can be applied to air insulated substations. This paper describes the analysis of transient voltages in a substation designed for 115 kV which is scheduled for operation at 230 kV. Both arrester rating and location are considered in this analysis. It is shown that complete substation protection is possible by addition of both arresters and capacitors.

Lannes, W.J.; Cheramie, W.J.; Priest, K.W.; Wilhelm, M.R.

1984-09-01T23:59:59.000Z

4

Substation EMC Standards: Volume 2  

Science Conference Proceedings (OSTI)

The substation presents a unique combination of critical and sensitive equipment embedded in a very harsh electromagnetic interference (EMI) environment. Electromagnetic (EM) noise is naturally generated by the normal operation of relays, disconnect switches, and circuit breakers in high voltage (HV) substations. Substations that incorporate flexible AC transmission systems (FACTS) and high voltage DC (HVDC) converters can create additional high frequency (HF) EM noise that may interfere with the operati...

2005-11-21T23:59:59.000Z

5

Substation Stormwater Management  

Science Conference Proceedings (OSTI)

Electric substations have unique considerations in stormwater management due to the presence of high voltage lines and fluids that create contaminant concerns. In response to the changing regulatory climate, Electric Power Research Institute (EPRI) members identified a need to assess and develop stormwater management strategies to control discharges from electric substation construction sites.BackgroundStormwater regulation is becoming more stringent across ...

2013-11-21T23:59:59.000Z

6

HIGH VOLTAGE GENERATOR  

DOE Patents (OSTI)

This patent relates to high voltage supply circuits adapted for providing operating voltages for GeigerMueller counter tubes, and is especially directed to an arrangement for maintaining uniform voltage under changing conditions of operation. In the usual power supply arrangement for counter tubes the counter voltage is taken from across the power supply output capacitor. If the count rate exceeds the current delivering capaciiy of the capacitor, the capacitor voltage will drop, decreasing the counter voltage. The present invention provides a multivibrator which has its output voltage controlled by a signal proportional to the counting rate. As the counting rate increases beyond the current delivering capacity of the capacitor, the rectified voltage output from the multivibrator is increased to maintain uniform counter voltage.

Zito, G.V.

1959-04-21T23:59:59.000Z

7

Substation EMC Standards  

Science Conference Proceedings (OSTI)

The electromagnetic (EM) environment in an electric power substation presents a challenging electromagnetic compatibility (EMC) problem. High voltages and currents, combined with devices such as flexible AC transmission systems (FACTS) and high voltage DC (HVDC) converters, have the potential to create EM environments that can interfere with the operation of control systems and nearby electronic devices. There have been a number of unexplained outages at FACTS facilities that are suspected of being EMI-r...

2004-11-29T23:59:59.000Z

8

Program on Technology Innovation: Application of a High Temperature Superconducting Fault Current Limiter at AEP's Sporn Substation  

Science Conference Proceedings (OSTI)

This report describes the application of a Superconducting Fault Current Limiter (SFCL) to address fault current over-duty problems in American Electric Power's 138kV Sporn Substation. EPRI is current developing SFCL technology targeted to address fault current over-duty problems at the transmission voltage level of 138kV and higher. The technology under development is termed the Matrix Fault Current Limiter (MFCL) due to the modular nature arrangements of its High Temperature Superconducting (HTS) eleme...

2007-10-30T23:59:59.000Z

9

Gas insulated substation equipment for industrial applications  

SciTech Connect

Until recently the only available method for construction of high voltage systems was to use exposed air insulated equipment supported on porcelain columns. The past decade has witnessed the introduction and wide acceptance of compressed gas insulated equipment as a viable alternative to the conventional substation system. The characteristics of gas insulated substations (GIS) and their application for industrial use at service voltages at 69 kV and above are discussed.

Kenedy, J.J.

1984-11-01T23:59:59.000Z

10

High voltage pulse conditioning  

DOE Patents (OSTI)

Apparatus for conditioning high voltage pulses from particle accelerators in order to shorten the rise times of the pulses. Flashover switches in the cathode stalk of the transmission line hold off conduction for a determinable period of time, reflecting the early portion of the pulses. Diodes upstream of the switches divert energy into the magnetic and electrostatic storage of the capacitance and inductance inherent to the transmission line until the switches close.

Stringfield, R.M.; Wheat, R.M. Jr.

1989-02-21T23:59:59.000Z

11

High voltage pulse conditioning  

DOE Patents (OSTI)

Apparatus for conditioning high voltage pulses from particle accelerators in order to shorten the rise times of the pulses. Flashover switches in the cathode stalk of the transmission line hold off conduction for a determinable period of time, reflecting the early portion of the pulses. Diodes upstream of the switches divert energy into the magnetic and electrostatic storage of the capacitance and inductance inherent to the transmission line until the switches close.

Springfield, Ray M. (Sante Fe, NM); Wheat, Jr., Robert M. (Los Alamos, NM)

1990-01-01T23:59:59.000Z

12

HIGH VOLTAGE GENERATOR  

DOE Patents (OSTI)

A generator is presented for producing relatively large currents at high voltages. In general, the invention comprises a plurality of capacitors connected in series by a plurality of switches alternately disposed with the capacitors. The circuit is mounted for movement with respect to contact members and switch closure means so that a load device and power supply are connected across successive numbers of capacitors, while the other capacitors are successively charged with the same power supply.

Schwemin, A.J.

1959-03-17T23:59:59.000Z

13

HIGH VOLTAGE GENERATOR  

DOE Patents (OSTI)

A generator for producing relatively large currents at high voltages is described. In general, the invention comprises a plurality of capacitors connected in series by a plurality of switches alternately disposed with the capacitors. The above-noted circuit is mounted for movement with respect to contact members and switch closure means so that a load device and power supply are connected across successive numbers of capacitors, while the other capacitors are successively charged with the same power supply.

Schwemin, A.J.

1959-03-17T23:59:59.000Z

14

HIGH VOLTAGE ION SOURCE  

DOE Patents (OSTI)

A device is described for providing a source of molecular ions having a large output current and with an accelerated energy of the order of 600 kv. Ions are produced in an ion source which is provided with a water-cooled source grid of metal to effect maximum recombination of atomic ions to molecular ions. A very high accelerating voltage is applied to withdraw and accelerate the molecular ions from the source, and means are provided for dumping the excess electrons at the lowest possible potentials. An accelerating grid is placed adjacent to the source grid and a slotted, grounded accelerating electrode is placed adjacent to the accelerating grid. A potential of about 35 kv is maintained between the source grid and accelerating grid, and a potential of about 600 kv is maintained between the accelerating grid and accelerating electrode. In order to keep at a minimum the large number of oscillating electrons which are created when such high voltages are employed in the vicinity of a strong magnetic field, a plurality of high voltage cascaded shields are employed with a conventional electron dumping system being employed between each shield so as to dump the electrons at the lowest possible potential rather than at 600 kv.

Luce, J.S.

1960-04-19T23:59:59.000Z

15

High voltage DC power supply  

DOE Patents (OSTI)

A high voltage DC power supply having a first series resistor at the output for limiting current in the event of a short-circuited output, a second series resistor for sensing the magnitude of output current, and a voltage divider circuit for providing a source of feedback voltage for use in voltage regulation is disclosed. The voltage divider circuit is coupled to the second series resistor so as to compensate the feedback voltage for a voltage drop across the first series resistor. The power supply also includes a pulse-width modulated control circuit, having dual clock signals, which is responsive to both the feedback voltage and a command voltage, and also includes voltage and current measuring circuits responsive to the feedback voltage and the voltage developed across the second series resistor respectively. 7 figs.

Droege, T.F.

1989-12-19T23:59:59.000Z

16

Contaminated Outdoor High Voltage Insulators  

Science Conference Proceedings (OSTI)

The external insulation of power lines and outdoor substations is a weak point in transmission systems. The insulation is particularly susceptible to failure if proper attention has not been given to its design, condition monitoring, and maintenance. In regions with high contamination levels, regular maintenance and the application of palliative measures can be critical to ensure that the system meets its outage performance targets. This can involve pure maintenance measures such as cleaning the insulato...

2009-12-22T23:59:59.000Z

17

Electromagnetic Transients in Substations, Volumes 5: Test Data Tapes  

Science Conference Proceedings (OSTI)

EPRI has investigated high-frequency electromagnetic interference (EMI) resulting from high-voltage switching, lightning, and faults in substations. This report provides information about EMI levels to which equipment is exposed.

1993-08-19T23:59:59.000Z

18

Living and Working Safely Around High-Voltage Power Lines.  

Science Conference Proceedings (OSTI)

High-voltage transmission lines can be just as safe as the electrical wiring in the homes--or just as dangerous. The crucial factor is ourselves: they must learn to behave safely around them. This booklet is a basic safety guide for those who live and work around power lines. It deals primarily with nuisance shocks due to induced voltages, and with potential electric shock hazards from contact with high-voltage lines. References on possible long-term biological effects of transmission lines are shown. In preparing this booklet, the Bonneville Power Administration has drawn on more than 50 years of experience with high-voltage transmission. BPA operates one of the world`s largest networks of long-distance, high-voltage lines. This system has more than 400 substations and about 15,000 miles of transmission lines, almost 4,400 miles of which are operated at 500,000 volts.

United States. Bonneville Power Administration.

2001-06-01T23:59:59.000Z

19

High voltage variable diameter insulator  

DOE Patents (OSTI)

A high voltage feedthrough assembly (10) having a tubular insulator (15) extending between the ground plane ring (16) and the high voltage ring (30). The insulator (15) is made of Pyrex and decreases in diameter from the ground plane ring (16) to the high voltage ring (30), producing equipotential lines almost perpendicular to the wall (27) of the insulator (15) to optimize the voltage-holding capability of the feedthrough assembly (10).

Vanecek, David L. (Martinez, CA); Pike, Chester D. (Pinole, CA)

1984-01-01T23:59:59.000Z

20

High voltage feedthrough bushing  

DOE Patents (OSTI)

A feedthrough bushing for a high voltage diode provides for using compression sealing for all sealing surfaces. A diode assembly includes a central conductor extending through the bushing and a grading ring assembly circumferentially surrounding and coaxial with the central conductor. A flexible conductive plate extends between and compressively seals against the central conductor and the grading ring assembly, wherein the flexibility of the plate allows inner and outer portions of the plate to axially translate for compression sealing against the central conductor and the grading ring assembly, respectively. The inner portion of the plate is bolted to the central conductor for affecting sealing. A compression beam is also bolted to the central conductor and engages the outer portion of the plate to urge the outer portion toward the grading ring assembly to obtain compression sealing therebetween.

Brucker, J.P.

1991-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

New controllers aid substation automation  

SciTech Connect

Descriptions of and experience with Siemens voltage regulators, voltage regulator control panels, and digital meters used by two electric cooperatives are described. Magic Valley Electric Cooperative in Texas retrofitted substations to improve substation regulation control. 54 Siemens MJ-XTM voltage regulator control panels were installed, replacing load tap changer control units and single-stage voltage regulator control units. The Smoky Hill Electric Cooperative in Kansas installed Siemens 4700 digital meters and upgraded substation voltage regulators with Siemens JFR single-phase, step voltage regulators to address nightly overvoltage and summer peak demand problems.

Beaty, W.

1996-09-01T23:59:59.000Z

22

A Case Study on the Effects of Distribution Line Capacitors on Substation Bus Voltage Regulated with a Load Tap Changing (LTC) Power Transformer: Southern Company Smart Grid Demonstration  

Science Conference Proceedings (OSTI)

This case study describes research to address the adverse effects of distribution capacitors on substation bus voltage with a load-tap-changing (LTC) power transformer. By adding fixed and switched capacitors to the distribution system, Southern Company is able to maintain an efficient distribution grid by providing the reactive power near the end-use devices consuming this power. However, pressure to improve the efficiency of the distribution system has resulted in Southern Company adding a large ...

2013-12-12T23:59:59.000Z

23

The Design and Implementation of a High-power Mobile Substation  

Science Conference Proceedings (OSTI)

This paper presents a scheme design and implementation of a high-power mobile substation, which used to convert local standard AC to the requirement of electrical equipment. In this system, a three-phase AC generator is driven by a DC motor, the motor ... Keywords: AC, frequency, motor, generator, feedback, efficiency, PID

Yongtai Chen; Tuyaun Qin; Jing Tang; Li Cai

2012-05-01T23:59:59.000Z

24

High frequency breakdown voltage  

SciTech Connect

This report contains information about the effect of frequency on the breakdown voltage of an air gap at standard pressure and temperature, 76 mm Hg and O{degrees}C, respectively. The frequencies of interest are 47 MHz and 60 MHz. Additionally, the breakdown in vacuum is briefly considered. The breakdown mechanism is explained on the basis of collision and ionization. The presence of the positive ions produced by ionization enhances the field in the gap, and thus determines the breakdown. When a low-frequency voltage is applied across the gap, the breakdown mechanism is the same as that caused by the DC or static voltage. However, when the frequency exceeds the first critical value f{sub c}, the positive ions are trapped in the gap, increasing the field considerably. This makes the breakdown occur earlier; in other words, the breakdown voltage is lowered. As the frequency increases two decades or more, the second critical frequency, f{sub ce}, is reached. This time the electrons start being trapped in the gap. Those electrons that travel multiple times across the gap before reaching the positive electrode result in an enormous number of electrons and positive ions being present in the gap. The result is a further decrease of the breakdown voltage. However, increasing the frequency does not decrease the breakdown voltage correspondingly. In fact, the associated breakdown field intensity is almost constant (about 29 kV/cm).The reason is that the recombination rate increases and counterbalances the production rate, thus reducing the effect of the positive ions` concentration in the gap. The theory of collision and ionization does not apply to the breakdown in vacuum. It seems that the breakdown in vacuum is primarily determined by the irregularities on the surfaces of the electrodes. Therefore, the effect of frequency on the breakdown, if any, is of secondary importance.

Chu, Thanh Duy

1992-03-01T23:59:59.000Z

25

Concrete Foundations in Substations and Transmission Lines  

Science Conference Proceedings (OSTI)

This report presents the results of surveys conducted to obtain information on the degradation of concrete foundations that support transmission towers and high-voltage substation equipment. Although concrete foundations are simple and inexpensive, their degradation or failure may have costly consequences, including potential equipment damage and the need for outages to allow movement of critical equipment so the ...

2012-12-14T23:59:59.000Z

26

Guidelines for the Life Extension of Substation Equipment  

Science Conference Proceedings (OSTI)

This report presents the results of an effort to establish the evolving industry needs for an updated chapter on high-voltage circuit breakers for the Electric Power Research Institute (EPRI) Report Guidelines for the Life Extension of Substations: 2002 Update (1001779), also knows as the Substation Equipment Life Extension Guidelines (LEG). The efforts included an assessment undertaken to document current power circuit breaker asset management and maintenance practices in order to identify utility needs...

2008-12-11T23:59:59.000Z

27

Microsoft Word - CX_DeMoss_Substation_Expansion_130531  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Alaric Hsu Alaric Hsu Project Manager - TEP-CSB-2 Proposed Action: De Moss Substation Expansion Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 Additions and modifications to transmission facilities Location: Sherman County, Oregon Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to expand its De Moss Substation yard located in Sherman County, Oregon. The expansion is necessary to install additional reactors that would provide the necessary reactive support to address the extreme high voltage at De Moss Substation resulting from the loss of the Big Eddy - DeMoss transmission line during winter peak conditions. The equipment at De Moss Substation is currently sustaining voltage

28

Proceedings from EPRI's Improve Overall Substations Maintenance (37B) & HVCB Life Management (37F) Task Force  

Science Conference Proceedings (OSTI)

EPRI's Improve Overall Substations Maintenance (37B) and High Voltage Circuit Breaker (HVCB) Life Management (37F) Task Force met December 5, 2007, in San Antonio, Texas. This technical update contains the proceedings of the meeting.

2008-02-04T23:59:59.000Z

29

High-voltage-compatible, fully depleted CCDs  

E-Print Network (OSTI)

result of this high-voltage requirement, we have taken a di?voltage is necessary in order to meet the PSF requirementsrequirements for SNAP have resulted in a need to operate at substrate bias voltages

2006-01-01T23:59:59.000Z

30

Substation grounding programs  

SciTech Connect

This document is a users manual and applications guide for the software package SGA. This package comprises four computer programs, namely SOMIP, SMECC, SGSYS, and TGRND. The first three programs are analysis models which are to be used in the design process of substation grounding systems. The fourth program, TGRND, is an analysis program for determining the transient response of a grounding system. This report, Volume 3, is a users manual and an installation and validation manual for the computer program SGSYS (Substation Grounding SYStem Analysis Program). This program analyzes the substation ground field given the total electric current injected into the ground field and the design of the grounding system. Standard outputs of the program are (1) total ground resistance, (2) step voltage, (3) touch voltage, (4) voltages on a grid of points, (5) voltage profile along straight lines, (6) transfer voltages, (7) ground potential rise, (8) body currents, (9) step voltage profile along straight lines, and (10) touch voltage profile along straight lines. This program can be utilized in an interactive or batch mode. In the interactive mode, the user defines the grounding system geometry, soil parameters, and output requests interactively, with the use of a user friendly conversational program. The users manual describes data requirements and data preparation procedures. An appendix provides forms which facilitate data collection procedures. The installation and validation manual describes the computer files which make up the program SGSYS and provides a test case for validation purposes.

Meliopoulos, A.P.S. (Georgia Inst. of Tech., Atlanta, GA (United States). Electric Power Lab.)

1992-05-01T23:59:59.000Z

31

Single-transformer substation for 500 kV and over  

SciTech Connect

At extra high voltage substations which must meet high reliability requirements, in particular, two autotransformer groups are often installed almost simultaneously independent of the load. As a result, significant capital investment is frozen for long periods, and scarce electrical equipment is utilized inefficiently. Thus, in a number of cases the construction of substations with a single group of single-phase autotransformers is desirable. In this case, on failure of one autotransformer phase the time of subnormal energy output due to disconnection of the substation may reach several hours. The efficiency of extra high voltage substations may be improved significantly by using a proposed circuit for connection of a group of single-phase transformers with a single reserve phase, permitting installation of one group of single-phase transformers at a substation without impairment of reliability. The installation, performance and cost of this transformer arrangement are discussed. It is concluded that the use of single-transformer 500 kV substations with the proposed circuit as distribution substations would, on the one hand, provide sufficient reliability for users and, on the other hand, would make them competitive with 220 to 330 kV substations. In this case the network reliability can be provided by sectionalizing the lines at the site of transformer connection. This circuit can be used with two-sided substation supply. (LCL)

Gryuntal, Yu.L.; Mikhailov, A.K.; Slavin, G.A.

1978-06-01T23:59:59.000Z

32

High voltage photovoltaic power converter  

DOE Patents (OSTI)

An array of independently connected photovoltaic cells on a semi-insulating substrate contains reflective coatings between the cells to enhance efficiency. A uniform, flat top laser beam profile is illuminated upon the array to produce electrical current having high voltage. An essentially wireless system includes a laser energy source being fed through optic fiber and cast upon the photovoltaic cell array to prevent stray electrical signals prior to use of the current from the array. Direct bandgap, single crystal semiconductor materials, such as GaAs, are commonly used in the array. Useful applications of the system include locations where high voltages are provided to confined spaces such as in explosive detonation, accelerators, photo cathodes and medical appliances.

Haigh, Ronald E. (Arvada, CO); Wojtczuk, Steve (Cambridge, MA); Jacobson, Gerard F. (Livermore, CA); Hagans, Karla G. (Livermore, CA)

2001-01-01T23:59:59.000Z

33

TRANSISTOR HIGH VOLTAGE POWER SUPPLY  

DOE Patents (OSTI)

High voltage, direct current power supplies are described for use with battery powered nuclear detection equipment. The particular advantages of the power supply described, are increased efficiency and reduced size and welght brought about by the use of transistors in the circuit. An important feature resides tn the employment of a pair of transistors in an alternatefiring oscillator circuit having a coupling transformer and other circuit components which are used for interconnecting the various electrodes of the transistors.

Driver, G.E.

1958-07-15T23:59:59.000Z

34

Comparative High Voltage Impulse Measurement  

Science Conference Proceedings (OSTI)

... substrate and surrounded by insulating oil; the low ... the amplitudes of the voltage peaks that are ... The uncertainties in the peak output voltages for the ...

2013-04-19T23:59:59.000Z

35

Laser-Triggered Lightning Laboratory Tests: Preparation for Testing at Mississippi State University High-Voltage Laboratory  

Science Conference Proceedings (OSTI)

Lightning diversion using laser technology could be operationally used in the power industry to protect sensitive facilities such as nuclear power plants and critical substations, control centers, and customer facilities. This report provides results to date and plans for large-scale, high-voltage laboratory testing of laser-triggered lightning technology.

1998-01-15T23:59:59.000Z

36

High voltage RF feedthrough bushing  

DOE Patents (OSTI)

Described is a multi-element, high voltage radio frequency bushing for trmitting RF energy to an antenna located in a vacuum container. The bushing includes a center conductor of complex geometrical shape, an outer coaxial shield conductor, and a thin-walled hollow truncated cone insulator disposed between central and outer conductors. The shape of the center conductor, which includes a reverse curvature portion formed of a radially inwardly directed shoulder and a convex portion, controls the uniformity of the axial surface gradient on the insulator cone. The outer shield has a first substantially cylindrical portion and a second radially inwardly extending truncated cone portion.

Grotz, Glenn F. (Huntington Station, NY)

1984-01-01T23:59:59.000Z

37

Ehv substation equipment challenges both designer and manufacturer  

SciTech Connect

Huge equipment and structures necessary to operate substations at extra-high voltage (ehv) require special design innovations. Because of the phase spacing required more real estate and larger, stronger takeoff structures are necessary. Also, economics (and optimization) becomes a more-important factor in design because of the large investment involved. Because generating plants are increasing steadily in size and are being located more remote from load centers, ehv transmission is becoming more common. Some of the design criteria and costs for ehv-substation equipment that is necessary to terminate the transmission lines at 345 kV and higher voltages are discussed.

Carey, H.D.

1965-12-01T23:59:59.000Z

38

Substation grounding programs  

SciTech Connect

This document is a users manual and applications guide for the software package SGA. This package comprises four computer programs, namely SOMIP, SMECC, SGSYS, and TGRND. The first three programs are analysis models which are to be used in the design process of substation grounding systems. The fourth program, TGRND, is an analysis program for determining the transient response of a grounding system. This report, Volume 2, is a users manual and an installation and validation manual for the computer program SMECC (Substation Maximum Earth Current Computation Program). This program analyzes the electric current distribution among grounded structures inside and outside a substation for different fault conditions. The fault conditions are automatically selected by the program, or they may be specified by the user, or both. The fault condition resulting in maximum substation earth current is identified and reported. Data requirements for this program are: ground impedance, transformer data, transmission line data, transmission line grounding impedances, etc. The program provides four types of standard outputs: (1) a report of voltages and current flow in the unfaulted system, (2) a brief report of the maximum ground potential rise (worst fault condition), (3) a summary report of all fault conditions which have been analyzed by the program, and (4) a detailed report of voltages and current flow for a selected set of fault conditions.

Meliopoulos, A.P.S. (Georgia Inst. of Tech., Atlanta, GA (United States). Electric Power Lab.)

1992-05-01T23:59:59.000Z

39

Computer Simulation of 132 / 11 KV Distribution Substation Using Static Var Compensator (SVC) for Voltage Enhancement - A Case Study  

Science Conference Proceedings (OSTI)

With the change in transmitted load in power system, reactive power varies accordingly, which may result into unacceptable voltage variation. This affects the performance of power system parameters like power loss and power factor. This paper deals with ...

M. J. Katira; K. B. Porate

2009-12-01T23:59:59.000Z

40

Substation Energy Storage Product Specification  

Science Conference Proceedings (OSTI)

This substation energy storage specification is intended to facilitate utility procurement of large grid-connected electrical energy storage systems that would typically be connected at medium voltage at distribution substations. Few utilities have experience with devices of this type, and industry practices are not extensively developed. Therefore, this update report may be used as a guide to suppliers of these devices (who may be unfamiliar with utility practices) as well as distribution utilities ...

2012-10-25T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Low power, scalable multichannel high voltage controller  

DOE Patents (OSTI)

A low voltage control circuit is provided for individually controlling high voltage power provided over bus lines to a multitude of interconnected loads. An example of a load is a drive for capillary channels in a microfluidic system. Control is distributed from a central high voltage circuit, rather than using a number of large expensive central high voltage circuits to enable reducing circuit size and cost. Voltage is distributed to each individual load and controlled using a number of high voltage controller channel switches connected to high voltage bus lines. The channel switches each include complementary pull up and pull down photo isolator relays with photo isolator switching controlled from the central high voltage circuit to provide a desired bus line voltage. Switching of the photo isolator relays is further controlled in each channel switch using feedback from a resistor divider circuit to maintain the bus voltage swing within desired limits. Current sensing is provided using a switched resistive load in each channel switch, with switching of the resistive loads controlled from the central high voltage circuit.

Stamps, James Frederick (Livermore, CA); Crocker, Robert Ward (Fremont, CA); Yee, Daniel Dadwa (Dublin, CA); Dils, David Wright (Fort Worth, TX)

2006-03-14T23:59:59.000Z

42

Low power, scalable multichannel high voltage controller  

DOE Patents (OSTI)

A low voltage control circuit is provided for individually controlling high voltage power provided over bus lines to a multitude of interconnected loads. An example of a load is a drive for capillary channels in a microfluidic system. Control is distributed from a central high voltage circuit, rather than using a number of large expensive central high voltage circuits to enable reducing circuit size and cost. Voltage is distributed to each individual load and controlled using a number of high voltage controller channel switches connected to high voltage bus lines. The channel switches each include complementary pull up and pull down photo isolator relays with photo isolator switching controlled from the central high voltage circuit to provide a desired bus line voltage. Switching of the photo isolator relays is further controlled in each channel switch using feedback from a resistor divider circuit to maintain the bus voltage swing within desired limits. Current sensing is provided using a switched resistive load in each channel switch, with switching of the resistive loads controlled from the central high voltage circuit.

Stamps, James Frederick (Livermore, CA); Crocker, Robert Ward (Fremont, CA); Yee, Daniel Dadwa (Dublin, CA); Dils, David Wright (Fort Worth, TX)

2008-03-25T23:59:59.000Z

43

HIGH VOLTAGE, HIGH CURRENT SPARK GAP SWITCH  

DOE Patents (OSTI)

A high voltage and current spark gap switch comprising two main electrodes insulatingly supported in opposed spaced relationship and a middle electrode supported medially between the main electrodes and symmetrically about the median line of the main electrodes is described. The middle electrode has a perforation aligned with the median line and an irradiation electrode insulatingly supported in the body of the middle electrode normal to the median line and protruding into the perforation. (AEC)

Dike, R.S.; Lier, D.W.; Schofield, A.E.; Tuck, J.L.

1962-04-17T23:59:59.000Z

44

Characterisation of the VELO High Voltage System  

E-Print Network (OSTI)

The high voltage system supplies the bias voltage to the 88 silicon sensors which comprise the LHCb Vertex Locator (VELO). This note describes the results of the tests which have been performed on the hardware of the high voltage system of the VELO. Each individual test detailed in this note corresponds to a specific requirement of the system. These requirements arise primarily from ensuring the safety of the silicon sensors and the quality of the data taken from the VELO modules. The tests performed are in four categories: normal operation of the high voltage system; verification of its stability under operation; discussion of its behaviour in failure modes; and details of operation at low voltage. Noteworthy issues, identified through the tests, include the behaviour of the high voltage modules at voltages below 9V, the current limit that can be applied during ramping of the voltage, and the speed with which the voltage is cut during failures of the system. The results of these tests provide high confidence that the high voltage system can be safely used and demonstrate that low noise is produced by the power supplies. LHCb Public Note, LHCb-2008-009Contents 1

Barinjaka Rakotomiaramanana; Chris Parkes; Lars Eklund

2008-01-01T23:59:59.000Z

45

Characterisation of the VELO High Voltage System  

E-Print Network (OSTI)

The high voltage system supplies the bias voltage to the 88 silicon sensors which comprise the LHCb Vertex Locator (VELO). This note describes the results of the tests which have been performed on the hardware of the high voltage system of the VELO. Each individual test detailed in this note corresponds to a specific requirement of the system. These requirements arise primarily from ensuring the safety of the silicon sensors and the quality of the data taken from the VELO modules. The tests performed are in four categories: normal operation of the high voltage system; vercation of its stability under operation; discussion of its behaviour in failure modes; and details of operation at low voltage. Noteworthy issues, identified through the tests, include the behaviour of the high voltage modules at voltages below 9V, the current limit that can be applied during ramping of the voltage, and the speed with which the voltage is cut during failures of the system. The results of these tests provide high confidence th...

Rakotomiaramanana, B; Eklund, L

2008-01-01T23:59:59.000Z

46

Characterisation of the VELO High Voltage System  

E-Print Network (OSTI)

The high voltage system supplies the bias voltage to the 88 silicon sensors which comprise the LHCb Vertex Locator (VELO). This note describes the results of the tests which have been performed on the hardware of the high voltage system of the VELO. Each individual test detailed in this note corresponds to a specific requirement of the system. These requirements arise primarily from ensuring the safety of the silicon sensors and the quality of the data taken from the VELO modules. The tests performed are in four categories: normal operation of the high voltage system; verification of its stability under operation; discussion of its behaviour in failure modes; and details of operation at low voltage. Noteworthy issues, identified through the tests, include the behaviour of the high voltage modules at voltages below 9V, the current limit that can be applied during ramping of the voltage, and the speed with which the voltage is cut during failures of the system. The results of these tests provide high confidence...

Rakotomiaramanana, B; Eklund, L

2008-01-01T23:59:59.000Z

47

High Voltage Safety Act | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

High Voltage Safety Act High Voltage Safety Act High Voltage Safety Act < Back Eligibility Commercial Construction Developer General Public/Consumer Industrial Installer/Contractor Utility Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State Georgia Program Type Safety and Operational Guidelines Siting and Permitting The purpose of the High Voltage Safety Act is to prevent injury to persons and property and interruptions of utility service resulting from accidental or inadvertent contact with high-voltage electric lines by providing that no work shall be done in the vicinity of such lines unless and until the owner or operator thereof has been notified of such work and has taken the appropriate safety measures. The Georgia Public Service Commission requires

48

Substation automation feasibility study. Final report. Export trade information  

SciTech Connect

This study, conducted by Macro Corporation, was funded by the U.S. Trade and Development Agency, on behalf of the Polish Power Grid Company. The report shows the results of a feasibility study for the implementation of substation automation on the company`s high-voltage transmission network. The report is aimed at providing a technical-economic assessment of modernizing the monitoring, protection, and control systems in the major transmission substations. The report is divided into the following sections: (1) Introduction; (2) Existing Situation And Assessment Of Operational Needs; (3) Functional Requirements; (4) Implementation Options and Costs; (5) Guidelines for Staged Implementation; (6) Conclusions and Recommendations.

1995-07-01T23:59:59.000Z

49

DESIGN OF INTEGRATED ANALYSIS REPORTS USING DATA FROM SUBSTATION IEDs  

E-Print Network (OSTI)

in electricity transmission substations has been proposed [8]. One of the project objectives requires integrated substation control system (WISCS)," in Advances in Power System Control, Operation and Management voltage electricity supply substations. The character of partial discharge and WLAN technology are briefly

Kezunovic, Mladen

50

High-voltage-compatible, fully depleted CCDs  

SciTech Connect

We describe charge-coupled device (CCD) developmentactivities at the Lawrence Berkeley National Laboratory (LBNL).Back-illuminated CCDs fabricated on 200-300 mu m thick, fully depleted,high-resistivity silicon substrates are produced in partnership with acommercial CCD foundry.The CCDs are fully depleted by the application ofa substrate bias voltage. Spatial resolution considerations requireoperation of thick, fully depleted CCDs at high substrate bias voltages.We have developed CCDs that are compatible with substrate bias voltagesof at least 200V. This improves spatial resolution for a given thickness,and allows for full depletion of thicker CCDs than previously considered.We have demonstrated full depletion of 650-675 mu m thick CCDs, withpotential applications in direct x-ray detection. In this work we discussthe issues related to high-voltage operation of fully depleted CCDs, aswell as experimental results on high-voltage-compatible CCDs.

Holland, Stephen E.; Bebek, Chris J.; Dawson, Kyle S.; Emes, JohnE.; Fabricius, Max H.; Fairfield, Jessaym A.; Groom, Don E.; Karcher, A.; Kolbe, William F.; Palaio, Nick P.; Roe, Natalie A.; Wang, Guobin

2006-05-15T23:59:59.000Z

51

High Voltage Testing of a 5-meter Prototype Triaxial HTS Cable  

SciTech Connect

High voltage tests were performed on a 5-m long prototype triaxial HTS cable (supplied by Ultera) at ORNL in preparation for installation of a 200-m HTS cable of the same design at the AEP utility substation in Columbus, Ohio. The triaxial design comprises three concentric phases and shield around a common former with the phase to phase dielectric at cryogenic temperature. Advantages of this design include increased current density, a reduced amount of HTS tape needed, and reduced heat load. The phase to phase voltage will be 13.2 kVrms (7.6 kVrms to ground). Preliminary testing was done on half-scale and full-scale terminations which successfully passed AC withstand, partial discharge, and impulse tests. High voltage tests conducted on the 5-m cable with the cable straight and after bending 90 degrees were ac withstand to 39 kVrms, partial discharge inception, and a minimum of 10 positive and 10 negative lightning waveform impulses at 110 kV. Phase to phase insulation was tested by applying high voltage to each phase one at a time with all the other phases grounded. Partial discharge data will be presented. The 5-m prototype triaxial HTS cable passed all the HV tests performed, with a PD inception voltage significantly above the required voltage.

Sauers, Isidor [ORNL; James, David Randy [ORNL; Ellis, Alvin R [ORNL; Tuncer, Enis [ORNL; Pace, Marshall O [ORNL; Gouge, Michael J [ORNL; Demko, Jonathan A [ORNL; Lindsay, David T [ORNL

2007-01-01T23:59:59.000Z

52

Modular high voltage power supply for chemical analysis  

DOE Patents (OSTI)

A high voltage power supply for use in a system such as a microfluidics system, uses a DC--DC converter in parallel with a voltage-controlled resistor. A feedback circuit provides a control signal for the DC--DC converter and voltage-controlled resistor so as to regulate the output voltage of the high voltage power supply, as well as, to sink or source current from the high voltage supply.

Stamps, James F. (Livermore, CA); Yee, Daniel D. (Dublin, CA)

2007-01-09T23:59:59.000Z

53

Modular high voltage power supply for chemical analysis  

DOE Patents (OSTI)

A high voltage power supply for use in a system such as a microfluidics system, uses a DC-DC converter in parallel with a voltage-controlled resistor. A feedback circuit provides a control signal for the DC-DC converter and voltage-controlled resistor so as to regulate the output voltage of the high voltage power supply, as well as, to sink or source current from the high voltage supply.

Stamps, James F. (Livermore, CA); Yee, Daniel D. (Dublin, CA)

2008-07-15T23:59:59.000Z

54

Advanced Power Electronics Controllers for Substations  

Science Conference Proceedings (OSTI)

Substations located at various points in the power delivery system serve several purposes. In a broad sense, power substations are installations capable of interrupting or establishing electric circuits and changing the voltage level, frequency, or other characteristic of the electric energy flow. Solid-state power electronic switching devices are continuing to evolve and multi-megawatt solid-state power control systems are becoming increasingly applied in industrial electrical installations. Both have a...

2008-12-17T23:59:59.000Z

55

Functionalized High Voltage Spinel Composite for High Power ...  

Science Conference Proceedings (OSTI)

Recently, spinel LiNi0.5Mn1.5O4 with high working voltage and long cycle life makes it become the one of most promising cathode for high power delivery.

56

High voltage VLF testing of power cables  

SciTech Connect

This publication describes a laboratory test program conducted with the objective to develop a test that would replace the existing dc withstand test. The article describes the methodology used to establish the voltage duration and magnitude of VLF (0.1 Hz) high voltage field tests suitable for crosslinked polyethylene (XLPE) insulated power cable. The results show that the voltage breakdown of laboratory aged XLPE cable at 0.1 Hz is approximately equal to that at 60 Hz, that proof tests at 0.1 Hz is approximately equal to that at 60 Hz, that proof tests at 0.1 Hz cause very little damage to the cable, and that 0.1 Hz testing appears to be a satisfactory alternate to dc testing. Preliminary values are suggested for voltage magnitude and time duration of cable acceptance, maintenance and proof tests at 0.1 Hz for XLPE cable rated up to 35 kV. A program is underway to similarly evaluate samples of service-aged XLPE cable; as well as to demonstrate the use of the preliminary test values at typical utility installations.

Eager, G.S.; Katz, C.; Fryszczyn, B. [Cable Technology Labs., Inc., New Brunswick, NJ (United States); Densley, J. [Ontario Hydro, Toronto, Ontario (Canada); Bernstein, B.S. [EPRI, Washington, DC (United States)

1997-04-01T23:59:59.000Z

57

Substation Integrated Automation System Based on DSP  

Science Conference Proceedings (OSTI)

This Paper introduces the application of digital signal processor (DSP) at Substation Integrated Automation System. Using the powerful digital signal processing capability of DSP, high-speed multi-channel data acquisition function, and excellent data ... Keywords: Substation, Digital Signal Processor, Integrated Automation System

Yanzhe Li; Duowang Fan; Xuwei Dong

2009-08-01T23:59:59.000Z

58

Motor voltage high harmonics influence to efficient energy usage  

Science Conference Proceedings (OSTI)

Analysis of the effect of non-sinusoidal voltages on the three-phase induction motor is presented in the paper. When the induction motors are supplied by a rectangular shape of the voltage inverter with high levels of harmonic voltage (Uh,i ... Keywords: energy efficiency, harmonics, induction motor, non-sinusoidal voltage, power losses

Miloje M. Kostic; Branka B. Kostic

2011-07-01T23:59:59.000Z

59

Activated Sintering, Spark Plasma Sintering and High Voltage ...  

Science Conference Proceedings (OSTI)

Mar 4, 2013 ... Novel Synthesis and Consolidation of Powder Materials : Activated Sintering, Spark Plasma Sintering and High Voltage Electric Discharge ...

60

Substation Data Integration  

Science Conference Proceedings (OSTI)

The purpose of the project was to implement a field demonstration of automated substation data integration. To achieve the goal of the smart grid, it will be necessary to integrate substation intelligent electronic device (IED) data into a data warehouse or data mart. Converting data to information to allow improved decision making requires automation, which is referred to as an information smart approach. The report discusses automated integration of data from substation IEDs and automated analysis of r...

2010-12-06T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

The design, construction, and operation of long-distance high-voltage electricity transmission technologies.  

SciTech Connect

This report focuses on transmission lines, which operate at voltages of 115 kV and higher. Currently, the highest voltage lines comprising the North American power grid are at 765 kV. The grid is the network of transmission lines that interconnect most large power plants on the North American continent. One transmission line at this high voltage was built near Chicago as part of the interconnection for three large nuclear power plants southwest of the city. Lines at this voltage also serve markets in New York and New England, also very high demand regions. The large power transfers along the West Coast are generally at 230 or 500 kV. Just as there are practical limits to centralization of power production, there are practical limits to increasing line voltage. As voltage increases, the height of the supporting towers, the size of the insulators, the distance between conductors on a tower, and even the width of the right-of-way (ROW) required increase. These design features safely isolate the electric power, which has an increasing tendency to arc to ground as the voltage (or electrical potential) increases. In addition, very high voltages (345 kV and above) are subject to corona losses. These losses are a result of ionization of the atmosphere, and can amount to several megawatts of wasted power. Furthermore, they are a local nuisance to radio transmission and can produce a noticeable hum. Centralized power production has advantages of economies of scale and special resource availability (for instance, hydro resources), but centralized power requires long-distance transfers of power both to reach customers and to provide interconnections for reliability. Long distances are most economically served at high voltages, which require large-scale equipment and impose a substantial footprint on the corridors through which power passes. The most visible components of the transmission system are the conductors that provide paths for the power and the towers that keep these conductors at a safe distance from each other and from the ground and the natural and built environment. Common elements that are generally less visible (or at least more easily overlooked) include the maintained ROW along the path of the towers, access roads needed for maintenance, and staging areas used for initial construction that may be restored after construction is complete. Also visible but less common elements along the corridor may include switching stations or substations, where lines of similar or different voltages meet to transfer power.

Molburg, J. C.; Kavicky, J. A.; Picel, K. C.

2008-03-03T23:59:59.000Z

62

High Voltage GaN Schottky Rectifiers  

SciTech Connect

Mesa and planar GaN Schottky diode rectifiers with reverse breakdown voltages (V{sub RB}) up to 550V and >2000V, respectively, have been fabricated. The on-state resistance, R{sub ON}, was 6m{Omega}{center_dot} cm{sup 2} and 0.8{Omega}cm{sup 2}, respectively, producing figure-of-merit values for (V{sub RB}){sup 2}/R{sub ON} in the range 5-48 MW{center_dot}cm{sup -2}. At low biases the reverse leakage current was proportional to the size of the rectifying contact perimeter, while at high biases the current was proportional to the area of this contact. These results suggest that at low reverse biases, the leakage is dominated by the surface component, while at higher biases the bulk component dominates. On-state voltages were 3.5V for the 550V diodes and {ge}15 for the 2kV diodes. Reverse recovery times were <0.2{micro}sec for devices switched from a forward current density of {approx}500A{center_dot}cm{sup -2} to a reverse bias of 100V.

CAO,X.A.; CHO,H.; CHU,S.N.G.; CHUO,C.-C.; CHYI,J.-I.; DANG,G.T.; HAN,JUNG; LEE,C.-M.; PEARTON,S.J.; REN,F.; WILSON,R.G.; ZHANG,A.P.

1999-10-25T23:59:59.000Z

63

EA-1671: Big River Substation to Poston Substation 69-Kilovolt...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transmission Line Project, Arizona and California EA-1671: Big River Substation to Poston Substation 69-Kilovolt Transmission Line Project, Arizona and California Summary The...

64

Real time prelocalisation of electrical defaults on high voltage underground cable (single-phase case)  

Science Conference Proceedings (OSTI)

This paper proposes an assistance tool to the prelocalisation of the insulation defaults affecting electrical single-phase cables by using voltage and current measurements available in source substation. An equivalent network modeling defaults to the ... Keywords: default distance, distributed parameters, insulation default, prelocalisation, sheath, underground cable

Thameur Aloui; Fathi Ben Amar; Nizar Derbel; Hsan Hadj Abdallah

2010-05-01T23:59:59.000Z

65

Qualification High Voltage Testing of Short Triax HTS Cables in the Laboratory  

Science Conference Proceedings (OSTI)

In order to qualify the electrical insulation design of future HTS cables installed in the electric grid, a number of high voltage qualification tests are generally performed in the laboratory on either single-phase model cables and/or actual three-phase cable samples. Prior to installation of the 200-m Triax HTS cable at the American Electric Power Bixby substation near Columbus, Ohio, in September, 2006, such tests were conducted on both single-phase model cables made at ORNL and tri-axial cable sections cut off from cable made on a production run. The three-phase tri-axial design provides some specific testing challenges since the ground shield and three phases are concentric about a central former with each phase separated by dielectric tape insulation immersed in liquid nitrogen. The samples were successfully tested and qualified for partial discharge inception, AC withstand, and lightning impulse where voltage is applied to one phase with the other phases grounded. In addition one of the phase pairs was tested for dc withstand as a ldquoworst caserdquo scenario to simulate the effect of VLF (Very Low Frequency) tests on the actual cable installed at the Bixby site. The model and prototype cables will be described and the high voltage test results summarized.

James, David Randy [ORNL; Sauers, Isidor [ORNL; Ellis, Alvin R [ORNL; Tuncer, Enis [ORNL; Gouge, Michael J [ORNL; Demko, Jonathan A [ORNL; Duckworth, Robert C [ORNL; Rey, Christopher M [ORNL

2009-01-01T23:59:59.000Z

66

Spark-plasma Sintering vs. High Voltage Electric Discharge ...  

Science Conference Proceedings (OSTI)

High voltage electric discharge consolidation (HVEDC) includes high axial pressure and discharge of the electrical energy stored in capacitors, thus enabling a ...

67

Substation Configuration Reliability 1 Reliability of Substation Configurations  

E-Print Network (OSTI)

-Repairable Components," Power Learn Electric Power Engineering Education, Module PE.PAS.U15.5, 2005. #12;SubstationSubstation Configuration Reliability 1 Reliability of Substation Configurations Daniel Nack, Iowa substation, it still contains what could be described as weak points or points of failure that would lead

McCalley, James D.

68

Cascode buffer for monolithic voltage conversion operating at high input supply voltages  

E-Print Network (OSTI)

A high-to-low switching DC-DC converter that operates at input supply voltages up to two times as high as the maximum voltage permitted in a nanometer CMOS technology is proposed in this paper. The circuit technique is based on a cascode bridge that maintains the steady-state voltage differences among the terminals of all of the transistors within a range imposed by a specific fabrication technology. The proposed circuit technique permits the full integration of active and passive devices of a switching DC-DC converter with a high voltage conversion ratio in a standard low voltage CMOS process. An efficiency of 87.8 % is achieved for 3.6 volts to 0.9 volts conversion assuming

Volkan Kursun; Gerhard Schrom; Vivek K. De; Eby G. Friedman; Siva G. Narendra

2005-01-01T23:59:59.000Z

69

High Voltage Electric Discharge Consolidation of Tantalum Powders  

Science Conference Proceedings (OSTI)

Abstract Scope, The high voltage electric discharge consolidation (HVEDC) is a promising method of the volumetric-porous body manufacturing, which can be ...

70

(SPS) and High Voltage Electric Discharge Consolidation (HVEDC  

Science Conference Proceedings (OSTI)

Presentation Title, Inter-Particle Contact Phenomena in Spark-Plasma Sintering ( SPS) and High Voltage Electric Discharge Consolidation (HVEDC). Author(s) ...

71

(SPS) and High Voltage Electric Discharge Consolidation (HVEDC)  

Science Conference Proceedings (OSTI)

Presentation Title, Local Heat Balance in Spark-plasma Sintering (SPS) and High Voltage Electric Discharge Consolidation (HVEDC). Author(s), Eugene ...

72

Chronic Benzodiazepine Administration Potentiates High Voltage-Activated Calcium Currents  

E-Print Network (OSTI)

.aspetjournals.orgDownloadedfrom #12;other drugs of abuse has been reported to enhance high voltage-activated calcium channels (HVAs

Brand, Paul H.

73

fault diagnosis of a high voltage transmission line using waveform ...  

E-Print Network (OSTI)

Oct 4, 2013 ... FAULT DIAGNOSIS OF A HIGH VOLTAGE TRANSMISSION LINE USING ... Fault types such as single line to ground, line to line, double line to ...

74

Substation Site Assessment  

Science Conference Proceedings (OSTI)

Companies assess environmental conditions at their facilities as part of routine operations and in preparation of property transfers. This report and template provide a simple, efficient guide for assessing substation facilities.

2001-02-09T23:59:59.000Z

75

Substation grounding programs  

SciTech Connect

This document is a users manual and applications guide for the software package SGA. This package comprises four computer programs, namely SOMIP, SMECC, SGSYS, and TGRND. The first three programs are analysis models which are to be used in the design process of substation grounding systems. The fourth program, TGRND, is an analysis program for determining the transient response of a grounding system. This report, Volume 5, is an applications guide of the three computer programs. SOMIP, SMECC, and SGSYS, for the purpose of designing a safe substation grounding system. The applications guide utilizes four example substation grounding systems for the purpose of illustrating the application of the programs, SOMIP, SMECC, and SGSYS. The examples are based on data provided by four contributing utilities, namely, Houston Lighting and Power Company, Southern Company Services, Puget Sound Power and Light Company, and Arizona Public Service Company. For the purpose of illustrating specific capabilities of the computer programs, the data have been modified. As a result, the final designs of the four systems do not necessarily represent actual grounding system designs by these utilities. The example system 1 is a 138 kV/35 kV distribution substation. The example system 2 is a medium size 230 kV/115 kV transmission substation. The third example system is a generation substation while the last is a large 525 kV/345 kV/230 kV transmission substation. The four examples cover most of the practical problems that a user may encounter in the design of substation grounding systems.

Meliopoulos, A.P.S. (Georgia Inst. of Tech., Atlanta, GA (United States). Electric Power Lab.)

1992-05-01T23:59:59.000Z

76

Substation Grounding Grids  

Science Conference Proceedings (OSTI)

This report is an account of research performed by the Electric Power Research Institute (EPRI) in 2011 on the subject of degradation of buried grounding grids in electric power substations. Substation ground grids are usually made of copper conductors, which are placed below grade and are joined together and to the above-grade structures with various types of connectors. While above-grade connections are visible and may be inspected, below-grade connections are not visible or readily accessible for insp...

2011-12-22T23:59:59.000Z

77

EPRI Substation Grounding Project  

Science Conference Proceedings (OSTI)

The Electric Power Research Institute (EPRI) has been conducting research in the area of substation grounding and fault current management for several decades. This research has resulted in a large number of reports and other products. To help users locate the results of EPRI’s research in substation grounding and fault current management, an annual update is prepared containing brief descriptions of the products.ObjectiveThe objective of this report is ...

2012-09-06T23:59:59.000Z

78

Substation equipment diagnostics  

SciTech Connect

Recent advances in signal processing techniques have paved the way for utilities to effectively meet the challenge of using existing assets more fully while maintaining traditional service reliability. Over the last 10 years, the author's institute has been applying these technological advances in the area of transmission substations to develop substation diagnostic devices and systems. Their involvement with transformer diagnostic is discussed in this paper.

Nilsson, S. (Electrical Equipment Div., Electric Power Research Inst. (US))

1990-09-01T23:59:59.000Z

79

Reclamations Mead Substation  

SciTech Connect

This 35 million dollar facility will be a vital part of the Pacific Northwest-Southwest Intertie. It will be one of the four terminals in the project, involving ehv direct current transmission of power. After site preparation, construction began July 25 on the Bureau of Reclamations Mead Substation. This is a key dc, ac terminal of the Pacific Northwest-Southwest Intertie. The entire Mead Substation, fully equipped with both ac and dc facilities, is scheduled for completion by September 1971.

Bennet, N.B.

1968-01-01T23:59:59.000Z

80

High Voltage Silicon Carbide NIST Workshop May 2012  

Science Conference Proceedings (OSTI)

... Page 3. Solid-State Power Substation (SSPS) ... Duration of test: 2 hours Load: 3000 A • Inlet water – 25C ... radar, - TRL6 testing in Q4 2012 ...

2012-07-02T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Balance of Substation Equipment Condition Assessment and Life-Extension Techniques  

Science Conference Proceedings (OSTI)

The work reported in this technical update is part of an ongoing Electric Power Research Institute (EPRI) effort to improve the balance of station equipment life management; this report presents results of investigations of issues, typical problems, and utility maintenance needs concerning substation high-voltage disconnect and grounding switches. This project phase included a needs assessment and research roadmap development to identify and address maintenance and other life cycle issues for manual and ...

2011-12-13T23:59:59.000Z

82

Electrical system architecture having high voltage bus  

DOE Patents (OSTI)

An electrical system architecture is disclosed. The architecture has a power source configured to generate a first power, and a first bus configured to receive the first power from the power source. The architecture also has a converter configured to receive the first power from the first bus and convert the first power to a second power, wherein a voltage of the second power is greater than a voltage of the first power, and a second bus configured to receive the second power from the converter. The architecture further has a power storage device configured to receive the second power from the second bus and deliver the second power to the second bus, a propulsion motor configured to receive the second power from the second bus, and an accessory motor configured to receive the second power from the second bus.

Hoff, Brian Douglas (East Peoria, IL); Akasam, Sivaprasad (Peoria, IL)

2011-03-22T23:59:59.000Z

83

A compact high voltage pulse generator  

SciTech Connect

A compact, easily transportable, pulse generator has been developed for a variety of applications that require a pulse duration in the range of 1 {mu} sec., voltages from 150 to 300 KV and current levels from 2,000 to 3,000 amps. The generator has a simple cylindrical configuration and modular construction to facilitate assembly and service. The generator may be operated single-pulse or repetitively at pulse repetition rates to 50 Hz in a burst mode.

Rohwein, G.J.; Babcock, S.R.

1994-07-01T23:59:59.000Z

84

HEMP-induced transients in electric power substations. Final report  

SciTech Connect

A nuclear detonation in or above the earth`s atmosphere produces an intense electromagnetic pulse (EMP). A large portion of the EMP electromagnetic energy is within the RF spectrum. A detonation at high altitudes above 40 km produces an EMP called high-altitude EMP (HEMP). HEMP is a steep-front short duration transient with a rise time on the order of a few nanoseconds which decays to near zero in less than a microsecond. A single high-altitude burst can subject much of the continental United States to intense HEMP electric fields on the order of tens of kilovolts per meter. The intense transient HEMP will induce fast transients in high-voltage transmission lines and bus structures, instrumentation cables, and control wires in power transmission and distribution (T & D) substations. A system of traveling wave coupling models for a 500 kV substation, including models for the high voltage primary bus, components (circuit breakers, disconnect switches, power transformers, and current and voltage instrument transformers), low voltage control wiring circuits, and a number of conducted and radiated interference coupling modes, had been developed earlier by EPRI. These EPRI served as the baseline for the present HEMP coupling investigations. The HEMP effects on protective relays were assessed for a nominal HEMP environment using several new field coupling models merged with the switching transient data. It is found that a representative solid state relay is unlikely to be damaged or to misoperate by the nominal HEMP threat with a peak field strength of 50 kV/m. However, it is possible for both DC control wires to flash over to ground simultaneously, causing fuses to blow and placing the relay in an inoperative state.

Wiggins, C.M.; Thomas, D.E.; Salas, T.M. [BDM International, Inc., Albuquerque, NM (United States)

1992-02-01T23:59:59.000Z

85

HEMP-induced transients in electric power substations  

SciTech Connect

A nuclear detonation in or above the earth's atmosphere produces an intense electromagnetic pulse (EMP). A large portion of the EMP electromagnetic energy is within the RF spectrum. A detonation at high altitudes above 40 km produces an EMP called high-altitude EMP (HEMP). HEMP is a steep-front short duration transient with a rise time on the order of a few nanoseconds which decays to near zero in less than a microsecond. A single high-altitude burst can subject much of the continental United States to intense HEMP electric fields on the order of tens of kilovolts per meter. The intense transient HEMP will induce fast transients in high-voltage transmission lines and bus structures, instrumentation cables, and control wires in power transmission and distribution (T D) substations. A system of traveling wave coupling models for a 500 kV substation, including models for the high voltage primary bus, components (circuit breakers, disconnect switches, power transformers, and current and voltage instrument transformers), low voltage control wiring circuits, and a number of conducted and radiated interference coupling modes, had been developed earlier by EPRI. These EPRI served as the baseline for the present HEMP coupling investigations. The HEMP effects on protective relays were assessed for a nominal HEMP environment using several new field coupling models merged with the switching transient data. It is found that a representative solid state relay is unlikely to be damaged or to misoperate by the nominal HEMP threat with a peak field strength of 50 kV/m. However, it is possible for both DC control wires to flash over to ground simultaneously, causing fuses to blow and placing the relay in an inoperative state.

Wiggins, C.M.; Thomas, D.E.; Salas, T.M. (BDM International, Inc., Albuquerque, NM (United States))

1992-02-01T23:59:59.000Z

86

Planar LTCC transformers for high voltage flyback converters.  

SciTech Connect

This paper discusses the design and use of low-temperature (850 C to 950 C) co-fired ceramic (LTCC) planar magnetic flyback transformers for applications that require conversion of a low voltage to high voltage (> 100V) with significant volumetric constraints. Measured performance and modeling results for multiple designs showed that the LTCC flyback transformer design and construction imposes serious limitations on the achievable coupling and significantly impacts the transformer performance and output voltage. This paper discusses the impact of various design factors that can provide improved performance by increasing transformer coupling and output voltage. The experiments performed on prototype units demonstrated LTCC transformer designs capable of greater than 2 kV output. Finally, the work investigated the effect of the LTCC microstructure on transformer insulation. Although this paper focuses on generating voltages in the kV range, the experimental characterization and discussion presented in this work applies to designs requiring lower voltage.

Schofield, Daryl (NASCENT Technology Inc. , Watertown, SD); Schare, Joshua M.; Glass, Sarah Jill; Roesler, Alexander William; Ewsuk, Kevin Gregory; Slama, George (NASCENT Technology Inc. , Watertown, SD); Abel, Dave (NASCENT Technology Inc. , Watertown, SD)

2007-06-01T23:59:59.000Z

87

Microsoft Word - CX_Memo_FranklinSubstation.docx  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Amy Freel Amy Freel Project Manager - TEP-TPP-1 Proposed Action: Franklin Substation Upgrades Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.11 Electrical power substations and interconnection facilities Location: Pasco, Washington Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: The BPA proposes to make improvements to the BPA fee-owned Franklin Substation located in southeastern Washington in order to bring the substation into compliance with BPA's minimum voltage guidelines. A shunt capacitor bank would be installed to provide voltage support. Project activities would include moving a temporary mobile capacitor bank, removing transformers, extending a 115-kilovolt (kV) bus, installing a new 115-kV

88

Optically triggered high voltage switch network and method for switching a high voltage  

DOE Patents (OSTI)

An optically triggered solid state switch and method for switching a high voltage electrical current. A plurality of solid state switches (350) are connected in series for controlling electrical current flow between a compensation capacitor (112) and ground in a reactive power compensator (50, 50') that monitors the voltage and current flowing through each of three distribution lines (52a, 52b and 52c), which are supplying three-phase power to one or more inductive loads. An optical transmitter (100) controlled by the reactive power compensation system produces light pulses that are conveyed over optical fibers (102) to a switch driver (110') that includes a plurality of series connected optical triger circuits (288). Each of the optical trigger circuits controls a pair of the solid state switches and includes a plurality of series connected resistors (294, 326, 330, and 334) that equalize or balance the potential across the plurality of trigger circuits. The trigger circuits are connected to one of the distribution lines through a trigger capacitor (340). In each switch driver, the light signals activate a phototransistor (300) so that an electrical current flows from one of the energy reservoir capacitors through a pulse transformer (306) in the trigger circuit, producing gate signals that turn on the pair of serially connected solid state switches (350).

El-Sharkawi, Mohamed A. (Renton, WA); Andexler, George (Everett, WA); Silberkleit, Lee I. (Mountlake Terrace, WA)

1993-01-19T23:59:59.000Z

89

E-beam high voltage switching power supply  

DOE Patents (OSTI)

A high-power power supply produces a controllable, constant high voltage put under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, an output rectifier for producing a dc voltage at the output of each module, and a current sensor for sensing output current. The power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle and circuitry is provided for sensing incipient arc currents at the output of the power supply to simultaneously decouple the power supply circuitry from the arcing load. The power supply includes a plurality of discrete switching type dc--dc converter modules.

Shimer, Daniel W. (Danville, CA); Lange, Arnold C. (Livermore, CA)

1996-01-01T23:59:59.000Z

90

E-beam high voltage switching power supply  

DOE Patents (OSTI)

A high-power power supply produces a controllable, constant high voltage output under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, an output rectifier for producing a dc voltage at the output of each module, and a current sensor for sensing output current. The power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle and circuitry is provided for sensing incipient arc currents at the output of the power supply to simultaneously decouple the power supply circuitry from the arcing load. The power supply includes a plurality of discrete switching type dc--dc converter modules. 5 figs.

Shimer, D.W.; Lange, A.C.

1996-10-15T23:59:59.000Z

91

High-voltage air-core pulse transformers  

SciTech Connect

General types of air core pulse transformers designed for high voltage pulse generation and energy transfer applications are discussed with special emphasis on pulse charging systems which operate up to the multi-megavolt range. The design, operation, dielectric materials, and performance are described. It is concluded that high voltage air core pulse transformers are best suited to applications outside the normal ranges of conventional magnetic core transformers. In general these include charge transfer at high power levels and fast pulse generation with comparatively low energy. When properly designed and constructed, they are capable of delivering high energy transfer efficiency and have demonstrated superior high voltage endurance. The principal disadvantage of high voltage air core transformers is that they are not generally available from commercial sources. Consequently, the potential user must become thoroughly familiar with all aspects of design, fabrication and system application before he can produce a high performance transformer system. (LCL)

Rohwein, G. J.

1981-01-01T23:59:59.000Z

92

Handbook of Alternative Technologies for Substation Emergency Power  

Science Conference Proceedings (OSTI)

Emergency power systems in electric substations play a critical role in substation reliability. This handbook characterizes backup power systems that offer high reliability, measurable capacity, and low maintenance for substation backup power applications. The handbook discusses better application of existing energy storage technologies as well as new technologies not yet commonly used in these applications. Reliability is the most important success criterion, while better condition monitoring and simpli...

2005-08-31T23:59:59.000Z

93

Modeling and Simulating Blast Effects on Electric Substations  

Science Conference Proceedings (OSTI)

A software simulation tool was developed at the Idaho National Laboratory to estimate the fragility of electric substation components subject to an explosive blast. Damage caused by explosively driven fragments on a generic electric substation was estimated by using a ray-tracing technique to track and tabulate fragment impacts and penetrations of substation components. This technique is based on methods used for assessing vulnerability of military aircraft and ground vehicles to explosive blasts. An open-source rendering and ray-trace engine was used for geometric modeling and interactions between fragments and substation components. Semi-empirical material interactions models were used to calculate blast parameters and simulate high-velocity material interactions between explosively driven fragments and substation components. Finally, a Monte Carlo simulation was added to model the random nature of fragment generation allowing a skilled analyst to predict failure probabilities of substation components.

Lyle G. Roybal; Robert F. Jeffers; Kent E. McGillivary; Tony D. Paul; Ryan Jacobson

2009-05-01T23:59:59.000Z

94

Substation automation problems and possibilities  

SciTech Connect

The evolutionary growth in the use and application of microprocessors in substations has brought the industry to the point of considering integrated substation protection, control, and monitoring systems. An integrated system holds the promise of greatly reducing the design, documentation, and implementation cost for the substation control, protection, and monitoring systems. This article examines the technical development path and the present implementation problems.

Smith, H.L.

1996-10-01T23:59:59.000Z

95

Substation Equipment Life Extension Guidelines  

Science Conference Proceedings (OSTI)

Utilities are under increasing pressure to maintain service reliability while operating aging transmission substations with leaner maintenance budgets and fewer experienced personnel. A structured life extension program can help utilities make equipment maintenance, replacement, and refurbishment decisions that ensure safe, reliable, cost-effective operation of transmission substation equipment. The Electric Power Research Institute (EPRI) report Life Extension Guidelines for Substation Equipment-Fi...

2011-12-21T23:59:59.000Z

96

Optical control system for high-voltage terminals  

DOE Patents (OSTI)

An optical control system for the control of devices in the terminal of an electrostatic accelerator includes a laser that is modulated by a series of preselected codes produced by an encoder. A photodiode receiver is placed in the laser beam at the high-voltage terminal of an electrostatic accelerator. A decoder connected to the photodiode decodes the signals to provide control impulses for a plurality of devices at the high voltage of the terminal.

Bicek, John J. (Tinley Park, IL)

1978-01-01T23:59:59.000Z

97

Lipon Coatings for High Voltage and High Temperature Li-Ion ...  

use of high-capacity and high-voltage cathode materials, but charging to voltages approaching 4.5-5V invariably causes rapid loss of capacity with cycling.

98

Available Technologies: High Voltage Compatible, Fully ...  

APPLICATIONS OF TECHNOLOGY: Small pixel, scientific CCDs where good point spread function (PSF) is required; High quantum efficiency direct detection ...

99

High voltage electrical amplifier having a short rise time  

DOE Patents (OSTI)

A circuit, comprising an amplifier and a transformer is disclosed that produces a high power pulse having a fast response time, and that responds to a digital control signal applied through a digital-to-analog converter. The present invention is suitable for driving a component such as an electro-optic modulator with a voltage in the kilovolt range. The circuit is stable at high frequencies and during pulse transients, and its impedance matching circuit matches the load impedance with the output impedance. The preferred embodiment comprises an input stage compatible with high-speed semiconductor components for amplifying the voltage of the input control signal, a buffer for isolating the input stage from the output stage; and a plurality of current amplifiers connected to the buffer. Each current amplifier is connected to a field effect transistor (FET), which switches a high voltage power supply to a transformer which then provides an output terminal for driving a load. The transformer comprises a plurality of transmission lines connected to the FETs and the load. The transformer changes the impedance and the voltage of the output. The preferred embodiment also comprises a low voltage power supply for biasing the FETs at or near an operational voltage. 8 figs.

Christie, D.J.; Dallum, G.E.

1989-12-07T23:59:59.000Z

100

High voltage electrical amplifier having a short rise time  

DOE Patents (OSTI)

A circuit, comprising an amplifier and a transformer is disclosed that produces a high power pulse having a fast response time, and that responds to a digital control signal applied through a digital-to-analog converter. The present invention is suitable for driving a component such as an electro-optic modulator with a voltage in the kilovolt range. The circuit is stable at high frequencies and during pulse transients, and its impedance matching circuit matches the load impedance with the output impedance. The preferred embodiment comprises an input stage compatible with high-speed semiconductor components for amplifying the voltage of the input control signal, a buffer for isolating the input stage from the output stage; and a plurality of current amplifiers connected to the buffer. Each current amplifier is connected to a field effect transistor (FET), which switches a high voltage power supply to a transformer which then provides an output terminal for driving a load. The transformer comprises a plurality of transmission lines connected to the FETs and the load. The transformer changes the impedance and voltage of the output. The preferred embodiment also comprises a low voltage power supply for biasing the FETs at or near an operational voltage.

Christie, David J. (Pleasanton, CA); Dallum, Gregory E. (Livermore, CA)

1991-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Design & Fabrication of a High-Voltage Photovoltaic Cell  

DOE Green Energy (OSTI)

Silicon photovoltaic (PV) cells are alternative energy sources that are important in sustainable power generation. Currently, applications of PV cells are limited by the low output voltage and somewhat low efficiency of such devices. In light of this fact, this project investigates the possibility of fabricating high-voltage PV cells on float-zone silicon wafers having output voltages ranging from 50 V to 2000 V. Three designs with different geometries of diffusion layers were simulated and compared in terms of metal coverage, recombination, built-in potential, and conduction current density. One design was then chosen and optimized to be implemented in the final device design. The results of the simulation serve as a feasibility test for the design concept and provide supportive evidence of the effectiveness of silicon PV cells as high-voltage power supplies.

Felder, Jennifer; /North Carolina State U. /SLAC

2012-09-05T23:59:59.000Z

102

Planar LTCC transformers for high voltage flyback converters: Part II.  

Science Conference Proceedings (OSTI)

This paper is a continuation of the work presented in SAND2007-2591 'Planar LTCC Transformers for High Voltage Flyback Converters'. The designs in that SAND report were all based on a ferrite tape/dielectric paste system originally developed by NASCENTechnoloy, Inc, who collaborated in the design and manufacturing of the planar LTCC flyback converters. The output/volume requirements were targeted to DoD application for hard target/mini fuzing at around 1500 V for reasonable primary peak currents. High voltages could be obtained but with considerable higher current. Work had begun on higher voltage systems and is where this report begins. Limits in material properties and processing capabilities show that the state-of-the-art has limited our practical output voltage from such a small part volume. In other words, the technology is currently limited within the allowable funding and interest.

Schofield, Daryl (NASCENTechnology, Inc., Watertown, SD); Schare, Joshua M., Ph.D.; Slama, George (NASCENTechnology, Inc., Watertown, SD); Abel, David (NASCENTechnology, Inc., Watertown, SD)

2009-02-01T23:59:59.000Z

103

High voltage series connected tandem junction solar battery  

DOE Patents (OSTI)

A high voltage series connected tandem junction solar battery which comprises a plurality of strips of tandem junction solar cells of hydrogenated amorphous silicon having one optical path and electrically interconnected by a tunnel junction. The layers of hydrogenated amorphous silicon, arranged in a tandem configuration, can have the same bandgap or differing bandgaps. The tandem junction strip solar cells are series connected to produce a solar battery of any desired voltage.

Hanak, Joseph J. (Lawrenceville, NJ)

1982-01-01T23:59:59.000Z

104

Microsoft Word - CX -Ostrander Substation Expansion.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6, 2011 6, 2011 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Amit Sinha Project Manager - TEP-CSB-2 Proposed Action: Ostrander Substation Addition Budget Information: Work order 00262568 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.11 Construction of electric power substations (including switching stations and support facilities)....or modification (other than voltage increases) of existing substations and support facilities... Location: Clackamas County, Oregon (T2S, R3E, Sections 26 and 35) Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA is proposing to expand its existing Ostrander Substation near Barton, Oregon by approximately 4 acres. The expansion would accommodate three new 230/500-kV transformers,

105

Gaseous insulators for high voltage electrical equipment  

DOE Patents (OSTI)

Gaseous insulators comprise compounds having high attachment cross sections for electrons having energies in the 0-1.3 electron volt range. Multi-component gaseous insulators comprise compounds and mixtures having overall high electron attachment cross sections in the 0-1.3 electron volt range and moderating gases having high cross sections for inelastic interactions with electrons of energies 1-4 electron volts. Suitable electron attachment components include hexafluorobutyne, perfluorobutene-2, perfluorocyclobutane, perfluorodimethylcyclobutane, perfluorocyclohexene, perfluoromethylcyclohexane, hexafluorobutadiene, perfluoroheptene-1 and hexafluoroazomethane. Suitable moderating gases include N.sub.2, CO, CO.sub.2 and H.sub.2. The gaseous insulating mixture can also contain SF.sub.6, perfluoropropane and perfluorobenzene.

Christophorou, Loucas G. (Oak Ridge, TN); James, David R. (Knoxville, TN); Pace, Marshall O. (Knoxville, TN); Pai, Robert Y. (Concord, TN)

1981-01-01T23:59:59.000Z

106

Gaseous insulators for high voltage electrical equipment  

DOE Patents (OSTI)

Gaseous insulators comprise compounds having high attachment cross sections for electrons having energies in the 0-1.3 electron volt range. Multi-component gaseous insulators comprise compounds and mixtures having overall high electron attachment cross sections in the 0-1.3 electron volt range and moderating gases having high cross sections for inelastic interactions with electrons of energies 1-4 electron volts. Suitable electron attachment components include hexafluorobutyne, perfluorobutene-2, perfluorocyclobutane, perfluorodimethylcyclobutane, perfluorocyclohexene, perfluoromethylcyclohexane, hexafluorobutadiene, perfluoroheptene-1 and hexafluoroazomethane. Suitable moderating gases include N.sub.2, CO, CO.sub.2 and H.sub.2. The gaseous insulating mixture can also contain SF.sub.6, perfluoropropane and perfluorobenzene.

Christophorou, Loucas G. (Oak Ridge, TN); James, David R. (Knoxville, TN); Pace, Marshall O. (Knoxville, TN); Pai, Robert Y. (Concord, TN)

1979-01-01T23:59:59.000Z

107

PUREX new substation ATR  

Science Conference Proceedings (OSTI)

This document is the acceptance test report (ATR) for the New PUREX Main and Minisubstations. It covers the factory and vendor acceptance and commissioning test reports. Reports are presented for the Main 5 kV substation building, the building fire system, switchgear, and vacuum breaker; the minisubstation control building and switch gear; commissioning test; electrical system and loads inspection; electrical utilities transformer and cable; and relay setting changes based on operational experience.

Nelson, D.E.

1997-05-12T23:59:59.000Z

108

E-beam high voltage switching power supply  

DOE Patents (OSTI)

A high power, solid state power supply is described for producing a controllable, constant high voltage output under varying and arcing loads suitable for powering an electron beam gun or other ion source. The present power supply is most useful for outputs in a range of about 100-400 kW or more. The power supply is comprised of a plurality of discrete switching type dc-dc converter modules, each comprising a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, and an output rectifier for producing a dc voltage at the output of each module. The inputs to the converter modules are fed from a common dc rectifier/filter and are linked together in parallel through decoupling networks to suppress high frequency input interactions. The outputs of the converter modules are linked together in series and connected to the input of the transmission line to the load through a decoupling and line matching network. The dc-dc converter modules are phase activated such that for n modules, each module is activated equally 360.degree./n out of phase with respect to a successive module. The phased activation of the converter modules, combined with the square current waveforms out of the step up transformers, allows the power supply to operate with greatly reduced output capacitance values which minimizes the stored energy available for discharge into an electron beam gun or the like during arcing. The present power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle using simulated voltage feedback signals and voltage feedback loops. Circuitry is also provided for sensing incipient arc currents reflected at the output of the power supply and for simultaneously decoupling the power supply circuitry from the arcing load.

Shimer, Daniel W. (Danville, CA); Lange, Arnold C. (Livermore, CA)

1997-01-01T23:59:59.000Z

109

E-beam high voltage switching power supply  

DOE Patents (OSTI)

A high power, solid state power supply is described for producing a controllable, constant high voltage output under varying and arcing loads suitable for powering an electron beam gun or other ion source. The present power supply is most useful for outputs in a range of about 100-400 kW or more. The power supply is comprised of a plurality of discrete switching type dc-dc converter modules, each comprising a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, and an output rectifier for producing a dc voltage at the output of each module. The inputs to the converter modules are fed from a common dc rectifier/filter and are linked together in parallel through decoupling networks to suppress high frequency input interactions. The outputs of the converter modules are linked together in series and connected to the input of the transmission line to the load through a decoupling and line matching network. The dc-dc converter modules are phase activated such that for n modules, each module is activated equally 360{degree}/n out of phase with respect to a successive module. The phased activation of the converter modules, combined with the square current waveforms out of the step up transformers, allows the power supply to operate with greatly reduced output capacitance values which minimizes the stored energy available for discharge into an electron beam gun or the like during arcing. The present power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle using simulated voltage feedback signals and voltage feedback loops. Circuitry is also provided for sensing incipient arc currents reflected at the output of the power supply and for simultaneously decoupling the power supply circuitry from the arcing load. 7 figs.

Shimer, D.W.; Lange, A.C.

1997-03-11T23:59:59.000Z

110

Experiment Hazard Class 13.0 - High Voltage  

NLE Websites -- All DOE Office Websites (Extended Search)

3.0 - High Voltage 3.0 - High Voltage Applicability This hazard classification applies to all experiments involving the use of High Voltage Equipment. Other hazard classifications and their associated hazard controls may also apply to experiments in this hazard class. The inspection of electric equipment is covered under the APS Policy For User Electric Equipment Inspections. NOTE: Unless required Argonne training has been completed, users are not authorized to perform electrical work. Experiment Category All Hazard Class 13 experiments are categorized as medium risk experiments. Experiment Hazard Control Verification Statements Engineered Controls - Determined by review and results of a DEEI inspection of the equipment. Procedural Controls - Determined by review and results of a DEEI

111

Cutting costs through substation ownership  

SciTech Connect

The term applied to service through a customer-owned main substation is primary service, and such customers are billed at primary metering rates. These terms denote that the customer accepts service (and billing metering is located) on the primary, rather than secondary, side of the main transformer. Some electric utilities are prepared to offer extremely attractive billing reductions to those customers willing to invest in their own main substations instead of renting a substation purchased with utility company capital. Depending on the utility and the particular circumstances, some plants can recover their investment in primary substation equipment in as little as 1 or 2 years.

Keithly, D. (ABB Electric, Waukesba, WI (US))

1989-06-22T23:59:59.000Z

112

Insulation and radio influence dictate design of 650 kV substation  

SciTech Connect

The 650 kV North Substation of Project EHV is marked by three unusual features which differentiate it from the more familiar 230 and 345 kV substations. First, the sheer size of the apparatus, structures, and busses is striking. Second, is the amount of insulation. As represented by insulators and bushings it is proportionally much larger in lower voltage substations. Third, is the absence of sharp protrusions or angles anywhere in the substation, even on the roof of the house where corona loss is measured. Shielding is evident everywhere in the circles or ovals of smooth aluminum tubing.

Abetti, P.A.

1961-03-27T23:59:59.000Z

113

Ultra-compact Marx-type high-voltage generator  

DOE Patents (OSTI)

An ultra-compact Marx-type high-voltage generator includes individual high-performance components that are closely coupled and integrated into an extremely compact assembly. In one embodiment, a repetitively-switched, ultra-compact Marx generator includes low-profile, annular-shaped, high-voltage, ceramic capacitors with contoured edges and coplanar extended electrodes used for primary energy storage; low-profile, low-inductance, high-voltage, pressurized gas switches with compact gas envelopes suitably designed to be integrated with the annular capacitors; feed-forward, high-voltage, ceramic capacitors attached across successive switch-capacitor-switch stages to couple the necessary energy forward to sufficiently overvoltage the spark gap of the next in-line switch; optimally shaped electrodes and insulator surfaces to reduce electric field stresses in the weakest regions where dissimilar materials meet, and to spread the fields more evenly throughout the dielectric materials, allowing them to operate closer to their intrinsic breakdown levels; and uses manufacturing and assembly methods to integrate the capacitors and switches into stages that can be arranged into a low-profile Marx generator.

Goerz, David A. (Brentwood, CA); Wilson, Michael J. (Modesto, CA)

2000-01-01T23:59:59.000Z

114

Substation Reliability Centered Maintenance  

SciTech Connect

Substation Reliability Centered Maintenance (RCM) is a technique that is used to develop maintenance plans and criteria so the operational capability of substation equipment is achieved, restored, or maintained. The objective of the RCM process is to focus attention on system equipment in a manner that leads to the formulation of an optimal maintenance plan. The RCM concept originated in the airline industry in the 1970s and has been used since 1985 to establish maintenance requirements for nuclear power plants. The RCM process is initially applied during the design and development phase of equipment or systems on the premise that reliability is a design characteristic. It is then reapplied, as necessary, during the operational phase to sustain a more optimal maintenance program based on actual field experiences. The purpose of the RCM process is to develop a maintenance program that provides desired or specified levels of operational safety and reliability at the lowest possible overall cost. The objectives are to predict or detect and correct incipient failures before they occur or before they develop into major defects, reduce the probability of failure, detect hidden problems, and improve the cost-effectiveness of the maintenance program. RCM accomplishes two basic purposes: (1) It identifies in real-time incipient equipment problems, averting potentially expensive catastrophic failures by communicating potential problems to appropriate system operators and maintenance personnel. (2) It provides decision support by recommending, identifying, and scheduling preventive maintenance. Recommendations are based on maintenance criteria, maintenance history, experience with similar equipment, real-time field data, and resource constraints. Hardware and software are used to accomplish these two purposes. The RCM system includes instrumentation that monitors critical substation equipment as well as computer software that helps analyze equipment data.

Purucker, S.L.

1992-11-01T23:59:59.000Z

115

High voltage gas insulated transmission line with continuous particle trapping  

DOE Patents (OSTI)

This invention provides a novel high voltage gas insulated transmission line utilizing insulating supports spaced at intervals with snap-in means for supporting a continuous trapping apparatus and said trapping apparatus having perforations and cutouts to facilitate trapping of contaminating particles and system flexibility.

Cookson, Alan H. (Pittsburgh, PA); Dale, Steinar J. (Monroeville, PA)

1983-01-01T23:59:59.000Z

116

Current isolating epitaxial buffer layers for high voltage photodiode array  

DOE Patents (OSTI)

An array of photodiodes in series on a common semi-insulating substrate has a non-conductive buffer layer between the photodiodes and the semi-insulating substrate. The buffer layer reduces current injection leakage between the photodiodes of the array and allows optical energy to be converted to high voltage electrical energy.

Morse, Jeffrey D. (Martinez, CA); Cooper, Gregory A. (Pleasant Hill, CA)

2002-01-01T23:59:59.000Z

117

High voltage bipolar-CMOS structure using porous silicon  

DOE Patents (OSTI)

A method for integrating a silicon-on-insulator device and a bulk bipolar device on a semiconductor body. The invention simultaneously forms the two regions for the silicon-on-insulator device and the bipolar device. The invention enables a high voltage CMOS power device to be located on the same chip as a bipolar logic device enabling smart power devices.

Guilinger, T.R.; Kelly, M.J.; Tsao, S.S.

1990-01-01T23:59:59.000Z

118

Control Techniques to Eliminate Voltage Emergencies in High Performance Processors  

E-Print Network (OSTI)

negligible impact on perfor­ mance and energy. With the ITRS roadmap predicting aggres­ sive drops in supply. At present it is difficult to design a high quality, low impedance power supply system, and industry trends in current variability, often re­ ferred to as the dI/dt problem, can cause supply voltage fluc­ tuations

Martonosi, Margaret

119

Control Techniques to Eliminate Voltage Emergencies in High Performance Processors  

E-Print Network (OSTI)

negligible impact on perfor- mance and energy. With the ITRS roadmap predicting aggres- sive drops in supply. At present it is difficult to design a high quality, low impedance power supply system, and industry trends in current variability, often re- ferred to as the dI/dt problem, can cause supply voltage fluc- tuations

Gupta, Rajiv

120

High Voltage Laboratory Testing of Femtosecond Laser Lightning Diversion  

Science Conference Proceedings (OSTI)

Lightning strikes cost the electric power industry an estimated 1 billion dollars annually in damage and lost revenue. One possible way of protecting critical and susceptible facilities from lightning strikes is to use lasers to trigger and divert lightning along a predetermined path. This report describes laboratory research on the use of ultrashort UV pulses and near IR pulses to trigger high voltage discharge.

1998-12-09T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Touch and Step Voltage Measurements on Field Installed Ground Grid and Concrete Pads  

Science Conference Proceedings (OSTI)

Concrete is commonly used as building material in substations (within the substation fence) and around substations (outside the fence) for driveways, foundations, walkways, oil containment, sidewalks, walls, and other structures. This project evaluates the effects of various types (reinforced, non-reinforced) and conditions (dry, wet) of concrete structures on step, touch, and transfer touch voltages in and around substations.

2009-12-03T23:59:59.000Z

122

Substation grounding programs  

SciTech Connect

The five volume report comprises the user manual, installation, and validation manual and an applications guide for the SGA (Substation Grounding Analysis) software package. SGA consists of four computer programs: (1) SOMIP, (2) SMECC, (3) SGSYS, and (4) TGRND. The first three programs provide a comprehensive analysis tool for the design of substation grounding systems to meet safety standards. The fourth program, TGRND, provides a state of the art analysis tool for computing transient ground potential rise and ground system impedance. This part of the report, Volume 1, is a users manual and an installation and validation manual for the computer program SOMIP (SOil Measurement Interpretation Program). This program computes the best estimate of the parameters of a two layer soil model from usual soil resistivity measurements. Four pin or three pin soil measurements can be accommodated. In addition, it provides error bounds on the soil parameters for a given confidence level. The users manual describes data requirements and data preparation procedures. The installation and validation manual describes the computer files which make up the program SOMIP and provides two test cases for validation purposes. 4 refs.

Meliopoulos, A.P.S. (Georgia Inst. of Tech., Atlanta, GA (United States). School of Electrical Engineering)

1992-05-01T23:59:59.000Z

123

Substation battery-maintenance procedures  

SciTech Connect

The frequency of substation battery failures is gratifyingly low. One trouble spot appears to be extraneous short circuits that drain an otherwise healthy battery. Use of the lead--calcium battery promises to reduce substantially the amount of maintenance that substation batteries need.

Timmerman, M.H.

1976-05-15T23:59:59.000Z

124

Substation automation gains momentum with modern options  

SciTech Connect

This paper discusses issues associated with utility substation automation. Monitoring equipment for monitoring power flow, quality, and harmonics for three substations simultaneously is described.

Beaty, W.

1996-12-01T23:59:59.000Z

125

Table 6. Existing and Proposed High-voltage Transmission Line ...  

U.S. Energy Information Administration (EIA)

U MAIN AC 345 345 0 Jun-08 Baldwin Power Plant Rush Island Substati 26 OH P S 0 1 2 9208 I9 9 U MAIN AC 345 345 0 Jun-08 Prairie State PP Sub Stallings Substation 7.5 ...

126

Scale model simulates full-size substation electric fields. [For 345-kV system  

SciTech Connect

An innovative scale model of a 345-kV substation that can be energized to produce representative electric fields has been developed. The purpose of the model is to determine how changes in substation design and operation affect ground-level voltage gradients. Recent tests of the field strengths predicted by the model and actual voltage gradients at the full-size substation at 150 different pairs of points showed excellent agreement. For 94 percent of the pairs the model error was less than 10 percent. The statistical mean of the absolute values of the discrepancies for all 150 points was only 4.6 percent.

1977-04-01T23:59:59.000Z

127

High voltage dc-dc converter with dynamic voltage regulation and decoupling during load-generated arcs  

DOE Patents (OSTI)

A high-power power supply produces a controllable, constant high voltage output under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, an output rectifier for producing a dc voltage at the output of each module, and a current sensor for sensing output current. The power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle and circuitry is provided for sensing incipient arc currents at the output of the power supply to simultaneously decouple the power supply circuitry from the arcing load. The power supply includes a plurality of discrete switching type dc--dc converter modules.

Shimer, Daniel W. (Danville, CA); Lange, Arnold C. (Livermore, CA)

1995-01-01T23:59:59.000Z

128

High voltage dc--dc converter with dynamic voltage regulation and decoupling during load-generated arcs  

DOE Patents (OSTI)

A high-power power supply produces a controllable, constant high voltage output under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, an output rectifier for producing a dc voltage at the output of each module, and a current sensor for sensing output current. The power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle and circuitry is provided for sensing incipient arc currents at the output of the power supply to simultaneously decouple the power supply circuitry from the arcing load. The power supply includes a plurality of discrete switching type dc--dc converter modules. 5 Figs.

Shimer, D.W.; Lange, A.C.

1995-05-23T23:59:59.000Z

129

Field Guide: Compressors for High-Voltage Circuit Breakers  

Science Conference Proceedings (OSTI)

High-voltage circuit breakers (HVCBs) perform essential protection and control functions on power transmission networks. Circuit breakers have multiple components that must operate in concert in order for the breaker to perform properly. If one component, such as the air or hydraulic system, does not operate correctly, the circuit breaker may misoperate or fail, possibly resulting in equipment damage or an outageboth expensive consequences. To help utilities prevent such undesirable events, this field gu...

2010-12-22T23:59:59.000Z

130

Field Guide: Compressors for High-Voltage Circuit Breakers  

Science Conference Proceedings (OSTI)

High-voltage circuit breakers (HVCBs) perform essential protection and control functions on power transmission networks. Circuit breakers have multiple components that must operate in concert in order for the breaker to perform properly. If one component, such as the air or hydraulic system, does not operate correctly, the circuit breaker may misoperate or fail, possibly resulting in equipment damage or an outage—both expensive consequences. To help ...

2012-12-14T23:59:59.000Z

131

High Voltage Direct Current (HVDC) Transmission Reference Book  

Science Conference Proceedings (OSTI)

The EPRI High-Voltage Direct Current (HVDC) Transmission Reference Book is a state-of-the-art guidebook that provides transmission companies with a comprehensive, single source of technical information and guidance for designing, building, operating, and extending the life of HVDC transmission systems. The book joins the landmark series of EPRI power delivery reference books. These comprehensive guidebooks—each printed with a distinctive colored cover—document and distill the ...

2012-12-31T23:59:59.000Z

132

Field Guide: High-Voltage Circuit Breaker Compressors – 2013 Update  

Science Conference Proceedings (OSTI)

High-voltage circuit breakers (HVCBs) perform essential protection and control functions on power transmission networks. Circuit breaker mechanisms have multiple components that must operate in concert in order for the breaker to perform properly. If one component, such as the air or hydraulic system, does not operate correctly, the circuit breaker may mis-operate or fail. A circuit breaker mis-operation may cause equipment damage and outages—both ...

2013-12-19T23:59:59.000Z

133

Advanced Voltage Control Strategies for High Penetration of Distributed Generation  

Science Conference Proceedings (OSTI)

This research addresses advanced voltage control strategies for inverter-connected distributed generation. The emphasis is on photovoltaic (PV) generation, and results also apply to distributed wind, fuel cells, micro-turbines, and battery systems that are connected to the grid through an inverter. In related work, the Electric Power Research Institute (EPRI) identified a set of high-priority functions for distributed generation. These included reactive power control such as intelligent and autonomous vo...

2010-12-31T23:59:59.000Z

134

High-Voltage Direct Current Line Conductor Optimization  

Science Conference Proceedings (OSTI)

Overhead transmission lines are designed to last for 40 years. Many ac lines in service today in North America are 70 or more years old. This survival rate is a result of conservative utility design practices and detailed product specifications. This reliability record has occurred despite a wide range of conductor types and sizes. In the present transmission system, there are far fewer high-voltage direct current (HVDC) lines, but those that have been designed and built have been similarly successful in...

2011-12-21T23:59:59.000Z

135

DEVELOPING FUTURE SUBSTATION AUTOMATION STRATEGIES: SELECTING  

E-Print Network (OSTI)

-Repairable Components," Power Learn Electric Power Engineering Education, Module PE.PAS.U15.5, 2005. #12;SubstationSubstation Configuration Reliability 1 Reliability of Substation Configurations Daniel Nack, Iowa substation, it still contains what could be described as weak points or points of failure that would lead

Kezunovic, Mladen

136

The All Superconducting Substation: A Comparison with a Conventional Substation  

Science Conference Proceedings (OSTI)

Conventional substations today are quite similar in appearance to those of 50 years ago. However, substation components, efficiency, and safety have improved considerably in that time. If the improvements are to continue, different technologies will be required in the future. Superconducting devices such as transformers and cables are under development at present and may provide more efficient and more reliable service than conventional components. This report describes the effects of substituting superc...

2000-11-07T23:59:59.000Z

137

Fiber optic current monitor for high-voltage applications  

DOE Patents (OSTI)

A current monitor which derives its power from the conductor being measured for bidirectionally measuring the magnitude of current (from DC to above 50 khz) flowing through a conductor across which a relatively high level DC voltage is applied, includes a pair of identical transmitter modules connected in opposite polarity to one another in series with the conductor being monitored, for producing from one module a first light signal having an intensity directly proportional to the magnitude of current flowing in one direction through the conductor during one period of time, and from the other module a second light signal having an intensity directly proportional to the magnitude of current flowing in the opposite direction through the conductor during another period of time, and a receiver located in a safe area remote from the high voltage area for receiving the first and second light signals, and converting the same to first and second voltage signals having levels indicative of the magnitude of current being measured at a given time. 6 figs.

Renda, G.F.

1992-04-21T23:59:59.000Z

138

Advanced Gate Drive for the SNS High Voltage Converter Modulator  

SciTech Connect

SLAC National Accelerator Laboratory is developing a next generation H-bridge switch plate [1], a critical component of the SNS High Voltage Converter Modulator [2]. As part of that effort, a new IGBT gate driver has been developed. The drivers are an integral part of the switch plate, which are essential to ensuring fault-tolerant, high-performance operation of the modulator. The redesigned driver improves upon the existing gate drive in several ways. The new gate driver has improved fault detection and suppression capabilities; suppression of shoot-through and over-voltage conditions, monitoring of dI/dt and Vce(sat) for fast over-current detection and suppression, and redundant power isolation are some of the added features. In addition, triggering insertion delay is reduced by a factor of four compared to the existing driver. This paper details the design and performance of the new IGBT gate driver. A simplified schematic and description of the construction are included. The operation of the fast over-current detection circuits, active IGBT over-voltage protection circuit, shoot-through prevention circuitry, and control power isolation breakdown detection circuit are discussed.

Nguyen, M.N.; Burkhart, C.; Kemp, M.A.; /SLAC; Anderson, D.E.; /Oak Ridge

2009-05-07T23:59:59.000Z

139

Assessment of High-Voltage Disconnect Switch Maintenance Practices  

Science Conference Proceedings (OSTI)

This technical update is part of an on-going EPRI effort to improve the balance of station equipment life management. It presents the initial results of investigations of issues, typical problems, and utility maintenance needs regarding station disconnect and grounding switches. Reliable and safe life-cycle management of substations requires timely and effective maintenance based on accurate inspection practices and knowledge of equipment conditions. In addition to tending to transformers and circuit bre...

2010-12-23T23:59:59.000Z

140

High voltage design structure for high temperature superconducting device  

DOE Patents (OSTI)

In accordance with the present invention, modular corona shields are employed in a HTS device to reduce the electric field surrounding the HTS device. In a exemplary embodiment a fault current limiter module in the insulation region of a cryogenic cooling system has at least one fault current limiter set which employs a first corona shield disposed along the top portion of the fault current limiter set and is electrically coupled to the fault current limiter set. A second corona shield is disposed along the bottom portion of the fault current limiter set and is electrically coupled to the fault current limiter set. An insulation barrier is disposed within the insulation region along at least one side of the fault current limiter set. The first corona shield and the second corona shield act together to reduce the electric field surrounding the fault limiter set when voltage is applied to the fault limiter set.

Tekletsadik, Kasegn D. (Rexford, NY)

2008-05-20T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Pepco's standard 80 MVa substation  

SciTech Connect

As a result of studies made prior to 1960, the Potomac Electric Power Company changes its distribution system from a 4.16 kV primary network to a 13.8 kV radial system, utilizing the 69 kV subtransmission system as the primary supply voltage. The 80 Mva substation design and arrangement were developed as an integral component of this system. Following the philosphy established in the 1930s, the electrical equipment would be completely enclosed within a building. This approach provided a functional as well as attractive substation which could be located in an existing community or in a developing area. The 80 Mva substation building was developed to provide maximum flexibility in appearance and electrical equipment arrangement as well as in engineering, drafting, and construction. Design details and future aspects are discussed.

Thaden, M.V.

1980-05-01T23:59:59.000Z

142

Substation control and protection project  

SciTech Connect

This report describes the results of EPRI-sponsored Project RP1359-7, dealing with digital protection and control of transmission class substations. Earlier work involved a study of the feasibility of an integrated protection and control system, specification of functional requirements and selection of the optimum architecture for the system. An integrated system including line, bus and transformer protection was designed, built and laboratory tested. It was subsequently installed at the Deans substation of Public Service Electric and Gas (New Jersey). A standalone, digital transmission line system was built and installed at the Branchburg substation of PSE G, for coordinated line protection with the integrated system. The system is called WESPAC, an acronym for Westinghouse Substation Protection and Control. 52 refs., 174 figs.

Cassel, R.L.; Deliyannides, J.S.; Dzieduszko, J.W.; Harvey, J.H.; Hertz, L.H.; Klancher, F.; Mays, L.M.; McGarry, M.J.; Pettis, L.G.; Pistolese, L.F.; Reuther, J.F.; Sackin, M.; Szarmach, D.J.; Udren, E.A. (Westinghouse ABB Power T and D Co., Coral Springs, FL (USA). Relay and Telecommunications Div.)

1990-04-01T23:59:59.000Z

143

Fault diagnosis using substation computer  

SciTech Connect

A number of substation integrated control and protection systems (ICPS) are being developed around the world, where the protective relaying, control, and monitoring functions of a substation are implemented using microprocessors. In this design, conventional relays and control devices are replaced by clusters of microprocessors, interconnected by multiplexed digital communication channels using fibre optic, twisted wire pairs or coaxial cables. The ICPS incorporates enhanced functions of value to the utility and leads to further advancement of the automation of transmission substations. This paper presents an automated method of fault diagnosis which can be incorporated in the station computer of an integrated control and protection system. The effectiveness of this method is demonstrated using a transmission-level substation as an example.

Jeyasurya, B. (Indian Inst. of Tech., Bombay (India)); Venkata, S.S. (Washington Univ., Seattle, WA (USA). Dept. of Electrical Engineering); Vadari, S.V. (ESCA Corp., Bellevue, WA (USA)); Postforoosh, J. (T and D. Protection Group, Puget Sound Power and Light, Bellevue, WA (US))

1990-04-01T23:59:59.000Z

144

Distribution System Voltage Performance Analysis for High-Penetration Photovoltaics  

DOE Green Energy (OSTI)

This report examines the performance of commonly used distribution voltage regulation methods under reverse power flow.

Liu, E.; Bebic, J.

2008-02-01T23:59:59.000Z

145

Blending a Substation into its Environment  

Science Conference Proceedings (OSTI)

As the demand for substations in residential and urban areas increasesand the public's tolerance of substations in their backyard decreaseselectric companies are faced with the growing challenge to reduce substation impact in terms of footprint, aesthetics, noise, interference, environmental impact, and safety. In parallel, there is an increasing demand to make substations more physically secure. This EPRI project is built on the premise that reducing a substation's impact on its surroundingsand making i...

2005-09-27T23:59:59.000Z

146

Live Work Guide for Substations  

Science Conference Proceedings (OSTI)

Live work (work on energized circuits) is the preferred method of maintenance where system integrity, system reliability, and operating revenues are at a premium and removal of a circuit or a substation from service is not acceptable. Live work (LW) may also be beneficial in construction and storm damage repair. Furthermore, live work may be unavoidable in the case of substations that serve essential facilities such as hospitals, law enforcement, fire departments, and intrusion alarms if standby local ge...

2004-10-28T23:59:59.000Z

147

Assessing Flicker Contribution of Individual Feeders to the Substation  

Science Conference Proceedings (OSTI)

Complaints of high flicker levels in a distribution system led to an investigation whose primary suspect was a customer with multiple resistive spot welders. A study was commissioned to identify and quantify the flicker contributions from various feeders at the upstream substation bus. The utility installed a digital power quality meter at the substation bus and at the primary metering point of the customer under suspicion and then compared the two trends. A series of time-domain measurements were also c...

2011-12-30T23:59:59.000Z

148

Electric power substation capital costs  

SciTech Connect

The displacement or deferral of substation equipment is a key benefit associated with several technologies that are being developed with the support of the US Department of Energy`s Office of Utility Technologies. This could occur, for example, as a result of installing a distributed generating resource within an electricity distribution system. The objective of this study was to develop a model for preparing preliminary estimates of substation capital costs based on rudimentary conceptual design information. The model is intended to be used by energy systems analysts who need ``ballpark`` substation cost estimates to help establish the value of advanced utility technologies that result in the deferral or displacement of substation equipment. This cost-estimating model requires only minimal inputs. More detailed cost-estimating approaches are recommended when more detailed design information is available. The model was developed by collecting and evaluating approximately 20 sets of substation design and cost data from about 10 US sources, including federal power marketing agencies and private and public electric utilities. The model is principally based on data provided by one of these sources. Estimates prepared with the model were compared with estimated and actual costs for the data sets received from the other utilities. In general, good agreement (for conceptual level estimating) was found between estimates prepared with the cost-estimating model and those prepared by the individual utilities. Thus, the model was judged to be adequate for making preliminary estimates of typical substation costs for US utilities.

Dagle, J.E.; Brown, D.R.

1997-12-01T23:59:59.000Z

149

Scoping study: Substation design workstation  

SciTech Connect

This project conducted a survey, consisting of a written questionaire, a workshop, and site visits to determine what facets of substation engineering would benefit from incorporation into a workstation environment. Based on the needs expressed by the respondents, a program for the staged development of a Substation Workstation is recommended. Six analytical function modules for assisting in substation engineering were identified for potential inclusion in the workstation: Initial Planning Activities; Physical Plant Design; Analytical Functions; Civil/Structural Design; Environmental Design; and Project Management. The initial release of the Substation Workstation is recommended to include the workstation environment (including MENTOR -- a concept for on-line help, tutorials, notepad, a minor spreadsheet, and interfaces to other regular desktop functions) and portions of the first three functional modules listed above. Recommendations for progress beyond this first release of the workstation included the development of additional capabilities within the initial functional modules, as well as the development of the remaining modules. An overlap exists between the analytical requirements for this workstation and those already included in the EPRI TLWorkstation and the ICWorkstation. In some cases, elements of these other workstations are also suggested for incorporation into the Substation Workstation (such as the foundation analyses from the TLWorkstation), and in others, an assimilation of the other workstation into the Substation Workstation is recommended (as with the ICWorkstation). Estimated resources for implementing the recommended program, including both costs and development time, are also provided.

Mauser, S.F. (Power Technologies, Inc., Wilmerding, PA (United States)); Conroy, M.W. (Sargent and Lundy, Chicago, IL (United States)); Singh, N.M. (Power Computing, Dallas, TX (United States))

1993-03-01T23:59:59.000Z

150

High Power, High Voltage FETs in Linear Applications: A User's Perspective  

SciTech Connect

The specifications of the current crop of highpower, high-voltage field-effect transistors (FETs) can lure a designer into employing them in high-voltage DC equipment. Devices with extremely low on-resistance and very high power ratings are available from several manufacturers. However, our experience shows that high-voltage, linear operation of these devices at near-continuous duty can present difficult reliability challenges at stress levels well-below their published specifications. This paper chronicles the design evolution of a 600 volt, 8 ampere shunt regulator for use with megawatt-class radio transmitters, and presents a final design that has met its reliability criteria.

N. Greenough, E. Fredd, S. DePasquale

2009-09-21T23:59:59.000Z

151

Curing system for high voltage cross linked cables  

DOE Patents (OSTI)

This invention makes extruded, vulcanized, high voltage cables insulated with thermosetting compounds at much higher rates of production and with superior insulation of reduced thickness and with reduced cavities or voids in the insulation. As the cable comes from an extruder, it passes into a curing chamber with a heat booster that quickly raises the insulation to a temperature at which it is cured much more quickly than with steam heating of the prior art. A high temperature liquid in contact with the insulation maintains the high temperature; and because of the greater curing heat, the cable can travel through the curing chamber at a faster rate and into a cooling tube where it contacts with a cooling liquid under high pressure. The insulation compound is treated to reduce the size of cavities; and the high pressure maintained by the curing and cooling mediums prevent expansion of cavities before the insulation is set.

Bahder, George (Edison, NJ); Katz, Carlos (Edison, NJ); Bopp, Louis A. (Fair Haven, NJ)

1978-01-01T23:59:59.000Z

152

Induction of nuclear fission by high-voltage application  

E-Print Network (OSTI)

In nuclear power generation, fissile materials are mainly used. For example, $U^{235}$ is fissile and therefore quite essential for use of nuclear energy. However, the material $U^{235}$ has very small natural abundance less than 1 %. We should seek possibility of utilizing fissionable materials such as $U^{238}$ because natural abundance of such fissionable materials is generally much larger than fissile ones. In this paper, we show that thermal neutrons with vanishing kinetic energy can induce nuclear fission when high voltage is applied to fissionable materials. To obtain this result, we use the liquid-drop model for nuclei. Finally, we propose how fissionable materials can be utilized.

Hirokazu Maruyama

2007-11-20T23:59:59.000Z

153

Self-monitoring high voltage transmission line suspension insulator  

DOE Patents (OSTI)

A high voltage transmission line suspension insulator (18 or 22) which monitors its own dielectric integrity. A dielectric rod (10) has one larger diameter end fitting attachable to a transmission line and another larger diameter end fitting attachable to a support tower. The rod is enclosed in a dielectric tube (14) which is hermetically sealed to the rod's end fittings such that a liquidtight space (20) is formed between the rod and the tube. A pressurized dielectric liquid is placed within that space. A discoloring dye placed within this space is used to detect the loss of the pressurized liquid.

Stemler, Gary E. (Vancouver, WA); Scott, Donald N. (Vancouver, WA)

1981-01-01T23:59:59.000Z

154

Worldwide reliability surveys of high voltage circuit breakers  

Science Conference Proceedings (OSTI)

This article reports on the results of two CIGRE 13.06 Working Group worldwide surveys of the reliability of high voltage circuit breakers, 63 kV and above. The first inquiry included 78,000 breaker-years of ``in service data`` from 102 utilities in 22 countries during the years 1974--1977 and included all interrupting technologies. The second inquiry included 70,708 breaker-years from 132 utilities in 22 countries for the years 1988--1991 and only included single-pressure SF6 breakers, because this is what most utilities are now buying. Thirty-one US utilities submitted data.

Heising, C.R.

1995-05-01T23:59:59.000Z

155

High-Voltage Power Supply System for Laser Isotope Separation  

SciTech Connect

This report presents several concepts for Laser High-Voltage Power Supply (HVPS) Systems for a Laser Isotope Separation facility. Selection of equipments and their arrangement into operational systems is based on proven designs and on application concepts now being developed. This report has identified a number of alternative system arrangements and has provided preliminary cost estimates for each. The report includes a recommendation for follow-on studies that will further define the optimum Laser HVPS Systems. Brief descriptions are given of Modulator/Regulator circuit trade-offs, system control interfaces, and their impact on costs.

Ketaily, E.C.; Buckner, R.P.; Uhrik, R.L.

1979-06-26T23:59:59.000Z

156

High Voltage Direct Current Live Line and Insulator Testing  

Science Conference Proceedings (OSTI)

This report has two main parts. The focus of the first part is on live work in overhead high-voltage direct current (HVDC) lines operating above 100 kV dc. It does not address issues related to lines for electric transport that typically operate below 60 kV dc worldwide. In addition, this first part of the report is not a detailed treatise on live work but, rather, addresses the main issues related to dc live work. More detailed information on the general topic of live work can be found in the references...

2011-12-23T23:59:59.000Z

157

An accurate continuous calibration system for high voltage current transformer  

SciTech Connect

A continuous calibration system for high voltage current transformers is presented in this paper. The sensor of this system is based on a kind of electronic instrument current transformer, which is a clamp-shape air core coil. This system uses an optical fiber transmission system for its signal transmission and power supply. Finally the digital integrator and fourth-order convolution window algorithm as error calculation methods are realized by the virtual instrument with a personal computer. It is found that this system can calibrate a high voltage current transformer while energized, which means avoiding a long calibrating period in the power system and the loss of power metering expense. At the same time, it has a wide dynamic range and frequency band, and it can achieve a high accuracy measurement in a complex electromagnetic field environment. The experimental results and the on-site operation results presented in the last part of the paper, prove that it can reach the 0.05 accuracy class and is easy to operate on site.

Tong Yue; Li Binhong [College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei Province (China)

2011-02-15T23:59:59.000Z

158

Definition: Dispersed Load By Substations | Open Energy Information  

Open Energy Info (EERE)

By Substations Jump to: navigation, search Dictionary.png Dispersed Load By Substations Substation load information configured to represent a system for power flow or system...

159

Dubal Cell Voltage Drop Initiatives towards Low Energy High ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2014 TMS Annual Meeting & Exhibition. Symposium , Aluminum Reduction Technology. Presentation Title, DUBAL CELL VOLTAGE ...

160

High-voltage atmospheric breakdown across intervening rutile dielectrics.  

SciTech Connect

This report documents work conducted in FY13 on electrical discharge experiments performed to develop predictive computational models of the fundamental processes of surface breakdown in the vicinity of high-permittivity material interfaces. Further, experiments were conducted to determine if free carrier electrons could be excited into the conduction band thus lowering the effective breakdown voltage when UV photons (4.66 eV) from a high energy pulsed laser were incident on the rutile sample. This report documents the numerical approach, the experimental setup, and summarizes the data and simulations. Lastly, it describes the path forward and challenges that must be overcome in order to improve future experiments for characterizing the breakdown behavior for rutile.

Williamson, Kenneth Martin; Simpson, Sean; Coats, Rebecca Sue; Jorgenson, Roy Eberhardt; Hjalmarson, Harold Paul; Pasik, Michael Francis

2013-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Assessment of the risk of fatal electric shocks inside a substation and in nearby exposed areas  

SciTech Connect

A simulation approach is elaborated for the risk assessment of fatal electric shocks due to touch and step voltages that are caused inside and around substations by ground faults. The approach suggested takes into account specific effects of ground faults, depending on their location, and various exposures encountered in practice. The fibrillation thresholds and human body impedance values are modelled as random functions to match well with the available experimental data. Several typical cases are analyzed for a substation, as an illustration. The approach developed is intended to serve for a realistic analysis of risks implied by grounding system design of a substation surrounded by exposed areas.

Nahman, J.M. (Belgrade Univ. (Yugoslavia))

1990-10-01T23:59:59.000Z

162

A high-voltage low-power DC-DC buck regulator for automotive applications  

Science Conference Proceedings (OSTI)

This work presents a High-Voltage Low-Power CMOS DC-DC buck regulator for automotive applications. The overall system, including the high and low voltage analog devices, the power MOS and the low voltage digital devices, was realized in the Austriamicrosystems ... Keywords: DC-DC regulator, buck converter, current control, low quiscent current, pulse frequency modulation

G. Pasetti; L. Fanucci; R. Serventi

2010-03-01T23:59:59.000Z

163

CMOS flash analog-to-digital converter for high speed and low voltage applications  

Science Conference Proceedings (OSTI)

A CMOS flash analog-to-digital converter (ADC) designed for high speed and low voltage is presented. Using the Threshold Inverter Quantization (TIQ) comparator technique, a flash ADC can be applied to low supply voltage. A fat tree encoder that has signal ... Keywords: TIQ comparator, analog-to-digital converter, fat tree encoder, flash ADC, high speed, low voltage

Jincheol Yoo; Kyusun Choi; Jahan Ghaznavi

2003-04-01T23:59:59.000Z

164

Assessment of Alternatives to Substation Batteries: Characterization of Energy Storage Technologies: Interim Report: Task 3  

Science Conference Proceedings (OSTI)

Backup power systems in electric company substations play a critical role in substation reliability. This product is intended to characterize energy storage technologies that can offer high reliability, measurable capacity, and low maintenance for substation backup power applications. Both new technologies, and better application of existing, energy storage technologies are covered. Reliability is the number one success criterion, while better condition monitoring and simplified maintenance requirements ...

2004-07-28T23:59:59.000Z

165

Ashland Area Support Substation Project  

Science Conference Proceedings (OSTI)

The Bonneville Power Administration (BPA) provides wholesale electric service to the City of Ashland (the City) by transferring power over Pacific Power Light Company's (PP L) 115-kilovolt (kV) transmission lines and through PP L's Ashland and Oak Knoll Substations. The City distributes power over a 12.5-kV system which is heavily loaded during winter peak periods and which has reached the limit of its ability to serve peak loads in a reliable manner. Peak loads under normal winter conditions have exceeded the ratings of the transformers at both the Ashland and Oak Knoll Substations. In 1989, the City modified its distribution system at the request of PP L to allow transfer of three megawatts (MW's) of electric power from the overloaded Ashland Substation to the Oak Knoll Substation. In cooperation with PP L, BPA installed a temporary 6-8 megavolt-amp (MVA) 115-12.5-kV transformer for this purpose. This additional transformer, however, is only a temporary remedy. BPA needs to provide additional, reliable long-term service to the Ashland area through additional transformation in order to keep similar power failures from occurring during upcoming winters in the Ashland area. The temporary installation of another 20-MVA mobile transformer at the Ashland Substation and additional load curtailment are currently being studied to provide for sustained electrical service by the peak winter period 1992. Two overall electrical plans-of-service are described and evaluated in this report. One of them is proposed for action. Within that proposed plan-of-service are location options for the substation. Note that descriptions of actions that may be taken by the City of Ashland are based on information provided by them.

Not Available

1992-06-01T23:59:59.000Z

166

{open_quotes}Secure Bus{close_quotes} disturbance-free power at the utility substation level  

Science Conference Proceedings (OSTI)

Over the last 18 months Public Service Company of New Mexico (PNM), El Camino Real Engineering, Inc. (CRE), Los Alamos National Laboratory (LANL) and Sandia National Laboratories (SNL) have worked on the development of disturbance-free power at the medium voltage substation level. The work resulted in the Secure Bus concept, a system in which a medium voltage bus in a substation is immune to power outages and voltage sags on the utility source. The Secure Bus voltage is also immune to voltage sags resulting from faults on any distribution feeder connected to the bus. The Secure Bus concept originated from work conducted to improve power quality for large high-tech manufacturing facilities, in particular for large semiconductor manufacturing plants. For the demands on quality power of a modern facility conventional equipment is not adequate for protecting the end user. For example, the operation of conventional vacuum breakers during short circuit conditions on a feeder circuit, requiring 3 to 5 cycles for breaker opening, does not allow for fast enough current interruption to avoid a voltage dip on the main bus. A sever voltage sag could result in a shut down of sensitive equipment being supplied by the other feeder circuits, which are connected to the main bus. The circumvent the problem, a fast breaker was introduced which interrupts the short circuit before the current causes a significant voltage disturbance. To make the bus immune also to power disturbances caused by power outages, energy storage is introduced to provide the necessary energy back-up in case the primary source is not available.

Boenig, H.J. [Los Alamos National Lab., NM (United States); Jones, W.H. [El Camino Real Engineering, Inc., Corrales, NM (United States)

1996-12-01T23:59:59.000Z

167

Monolithic high voltage nonlinear transmission line fabrication process  

DOE Patents (OSTI)

A process for fabricating sequential inductors and varistor diodes of a monolithic, high voltage, nonlinear, transmission line in GaAs is disclosed. An epitaxially grown laminate is produced by applying a low doped active n-type GaAs layer to an n-plus type GaAs substrate. A heavily doped p-type GaAs layer is applied to the active n-type layer and a heavily doped n-type GaAs layer is applied to the p-type layer. Ohmic contacts are applied to the heavily doped n-type layer where diodes are desired. Multiple layers are then either etched away or Oxygen ion implanted to isolate individual varistor diodes. An insulator is applied between the diodes and a conductive/inductive layer is thereafter applied on top of the insulator layer to complete the process. 6 figs.

Cooper, G.A.

1994-10-04T23:59:59.000Z

168

Monolithic high voltage nonlinear transmission line fabrication process  

DOE Patents (OSTI)

A process for fabricating sequential inductors and varactor diodes of a monolithic, high voltage, nonlinear, transmission line in GaAs is disclosed. An epitaxially grown laminate is produced by applying a low doped active n-type GaAs layer to an n-plus type GaAs substrate. A heavily doped p-type GaAs layer is applied to the active n-type layer and a heavily doped n-type GaAs layer is applied to the p-type layer. Ohmic contacts are applied to the heavily doped n-type layer where diodes are desired. Multiple layers are then either etched away or Oxygen ion implanted to isolate individual varactor diodes. An insulator is applied between the diodes and a conductive/inductive layer is thereafter applied on top of the insulator layer to complete the process.

Cooper, Gregory A. (346 Primrose Dr., Pleasant Hill, CA 94523)

1994-01-01T23:59:59.000Z

169

Voltage spike detection in high field superconducting accelerator magnets  

SciTech Connect

A measurement system for the detection of small magnetic flux changes in superconducting magnets, which are due to either mechanical motion of the conductor or flux jump, has been developed at Fermilab. These flux changes are detected as small amplitude, short duration voltage spikes, which are {approx}15mV in magnitude and lasts for {approx}30 {micro}sec. The detection system combines an analog circuit for the signal conditioning of two coil segments and a fast data acquisition system for digitizing the results, performing threshold detection, and storing the resultant data. The design of the spike detection system along with the modeling results and noise analysis will be presented. Data from tests of high field Nb{sub 3}Sn magnets at currents up to {approx}20KA will also be shown.

Orris, D.F.; Carcagno, R.; Feher, S.; Makulski, A.; Pischalnikov, Y.M.; /Fermilab

2004-12-01T23:59:59.000Z

170

Blending a Substation into Its Environment  

Science Conference Proceedings (OSTI)

This report provides case studies and analyses of technologies to demonstrate that the use of gas-insulated stations (GIS) technology helps utilities to site substations in locations that would pose significant challenges to conventional outdoor substations.

2007-11-13T23:59:59.000Z

171

Application Filling Requirements for Transmission Line and Substation...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Application Filling Requirements for Transmission Line and Substation Construction Projects (Wisconsin) Application Filling Requirements for Transmission Line and Substation...

172

Substation Sensor Database Version 1.0  

Science Conference Proceedings (OSTI)

The Substation Sensor database provides utilities with a searchable list of sensors available to be applied in substation applications. The Substation Sensor Database provides a searchable database of sensors available to substation engineers, categorized by Area, Component, Sub-Component, Parameter, and Technology. By specifying each category, the list can be filtered to a sub-set of sensors. By clicking on a sensorname, details can be viewed including a description, sensor maturity, and a link to the m...

2010-11-10T23:59:59.000Z

173

High-voltage supply for neutron tubes in well-logging applications  

DOE Patents (OSTI)

A high voltage supply is provided for a neutron tube used in well logging. The biased pulse supply of the invention combines DC and full pulse techniques and produces a target voltage comprising a substantial negative DC bias component on which is superimposed a pulse whose negative peak provides the desired negative voltage level for the neutron tube. The target voltage is preferably generated using voltage doubling techniques and employing a voltage source which generates bipolar pulse pairs having an amplitude corresponding to the DC bias level.

Humphreys, D.R.

1982-09-15T23:59:59.000Z

174

Circuit for monitoring temperature of high-voltage equipment  

DOE Patents (OSTI)

This invention relates to an improved circuit for measuring temperature in a region at high electric potential and generating a read-out of the same in a region at lower potential. The circuit is specially designed to combine high sensitivity, stability, and accuracy. A major portion of the circuit situated in the high-potential region can take the form of an integrated circuit. The preferred form of the circuit includes an input section which is situated in the high-potential region and comprises a temperature-compensated thermocouple circuit for sensing temperature, an oscillator circuit for generating a train of ramp voltages whose rise time varies inversely with the thermocouple output, a comparator and switching circuit for converting the oscillator output to pulses whose frequency is proportional to the thermocouple output, and a light-emitting diode which is energized by these pulses. An optical coupling transmits the light pulses generated by the diode to an output section of the circuit, situated in a region at ground. The output section comprises means for converting the transmitted pulses to electrical pulses of corresponding frequency, means for amplifying the electrical pulses, and means for displaying the frequency of the same. The preferred embodiment of the overall circuit is designed so that the frequency of the output signal in hertz and tenths of hertz is equal to the sensed temperature in degrees and tenths of degrees.

Jacobs, Martin E. (Chillicothe, OH)

1976-01-01T23:59:59.000Z

175

Proceedings: Tenth EPRI Substation Equipment Diagnostics Conference  

SciTech Connect

Advanced monitoring and diagnostic sensors and systems are needed to provide reliable and accurate information for determining the condition of major transmission substation equipment. The tenth EPRI Substation Equipment Diagnostics Conference highlighted the work of researchers, universities, manufacturers, and utilities in producing advanced monitoring and diagnostic equipment for substations.

None

2002-06-01T23:59:59.000Z

176

Proceedings: Substation Equipment Diagnostics Conference IX  

SciTech Connect

Advanced monitoring and diagnostic sensors and systems are needed to provide reliable and accurate information for determining the condition of major transmission substation equipment. The ninth EPRI Substation Equipment Diagnostics Conference highlighted the work of researchers, universities, manufacturers, and utilities in producing advanced monitoring and diagnostic equipment for substations.

None

2001-09-01T23:59:59.000Z

177

Proceedings: Substation Equipment Diagnostics Conference VIII  

SciTech Connect

Advanced monitoring and diagnostic sensors and systems are needed to provide reliable and accurate information for determining the condition of major transmission substation equipment. The eighth EPRI Substation Equipment Diagnostics Conference highlighted the work of researchers, universities, manufacturers, and utilities in producing advanced monitoring and diagnostic equipment for substations.

None

2000-06-01T23:59:59.000Z

178

Proceedings: Tenth EPRI Substation Equipment Diagnostics Conference  

Science Conference Proceedings (OSTI)

Advanced monitoring and diagnostic sensors and systems are needed to provide reliable and accurate information for determining the condition of major transmission substation equipment. The tenth EPRI Substation Equipment Diagnostics Conference highlighted the work of researchers, universities, manufacturers, and utilities in producing advanced monitoring and diagnostic equipment for substations.

2002-06-27T23:59:59.000Z

179

Substation Ground Grid Impedance Measurement  

Science Conference Proceedings (OSTI)

Because safety impacts all segments of the electric power industry, the integrity and conformance to standards of substation grounding systems is of paramount importance. This report summarizes field demonstrations of commercially available meters for performance evaluation of large grounding systems, including the EPRI Ground Grid Evaluator (commercially known as the Smart Ground Multimeter or SGM).

2007-12-13T23:59:59.000Z

180

East Grangeville Substation : Environmental Assessment.  

SciTech Connect

BPA proposes to build a 6/8 MVA, 115/13.8-kV substation about 0.7 mile (1.2 km) east of Grangeville, Idaho. BPA's substation yard would comprise an area of 70 by 72 feet (21 by 22 m) containing a 115/13.8-kV transformer. Energization for the substation is scheduled for September 1983. In connected actions the Co-op would build a 13.8-kV switching station and a 13.8/34.5-kV step-up station. The Co-op would require an area of 100 by 55 feet (31 by 17 m) in addition to the BPA yard. The total area needed for the combined BPA/Co-op substation would be approximately 170 by 127 feet (52 by 40 m) or one-half of an acre (0.20 ha). The Co-op would also build two 13.8-kV feeders and one 34.5-kV feeder underground south of the substation to overhead distribution lines along State Highway 13 with space for one future feeder. Another 13.8-kV feeder would exit the substation underground and loop around to the north to reconnect to the existing 13.8-kV overhead line. TWWP would build a tapline from their Grangeville-Kamiah-Nez Perce (Grangeville-Nez Perce No. 2) 115-kV transmission line to the substation. This line would be approximately 0.75 mile (1.2 km) long and would consist of single wood pole structures built on the route of an existing Co-op distribution line. The new and existing lines would use the same poles. A temporary access road would be built for 0.25 mile (0.4 km). The remaining 0.5 mile (0.8 km) section would be adjacent to a county road and would not require an access road. Two sites were identified as meeting the technical requirements. Site 2 is recommended.

United States. Bonneville Power Administration.

1983-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

High voltage power supply with modular series resonant inverters  

DOE Patents (OSTI)

A relatively small and compact high voltage, high current power supply for a laser utilizes a plurality of modules containing series resonant half bridge inverters. A pair of reverse conducting thyristors are incorporated in each series resonant inverter module such that the series resonant inverter modules are sequentially activated in phases 360.degree./n apart, where n=number of modules for n>2. Selective activation of the modules allows precise output control reducing ripple and improving efficiency. Each series resonant half bridge inverter module includes a transformer which has a cooling manifold for actively circulating a coolant such as water, to cool the transformer core as well as selected circuit elements. Conductors connecting and forming various circuit components comprise hollow, electrically conductive tubes such as copper. Coolant circulates through the tubes to remove heat. The conductive tubes act as electrically conductive lines for connecting various components of the power supply. Where it is desired to make electrical isolation breaks, tubes comprised of insulating material such as nylon are used to provide insulation and continue the fluid circuit.

Dreifuerst, Gary R. (Livermore, CA); Merritt, Bernard T. (Livermore, CA)

1995-01-01T23:59:59.000Z

182

High voltage power supply with modular series resonant inverters  

DOE Patents (OSTI)

A relatively small and compact high voltage, high current power supply for a laser utilizes a plurality of modules containing series resonant half bridge inverters. A pair of reverse conducting thyristors are incorporated in each series resonant inverter module such that the series resonant inverter modules are sequentially activated in phases 360{degree}/n apart, where n=number of modules for n>2. Selective activation of the modules allows precise output control reducing ripple and improving efficiency. Each series resonant half bridge inverter module includes a transformer which has a cooling manifold for actively circulating a coolant such as water, to cool the transformer core as well as selected circuit elements. Conductors connecting and forming various circuit components comprise hollow, electrically conductive tubes such as copper. Coolant circulates through the tubes to remove heat. The conductive tubes act as electrically conductive lines for connecting various components of the power supply. Where it is desired to make electrical isolation breaks, tubes comprised of insulating material such as nylon are used to provide insulation and continue the fluid circuit. 11 figs.

Dreifuerst, G.R.; Merritt, B.T.

1995-07-18T23:59:59.000Z

183

MOV surge arresters: improved substation equipment protection  

Science Conference Proceedings (OSTI)

The introduction of metal-oxide-varistor (MOV) surge arresters has added a new dimension to substation equipment protection. Through the optimal use of these arresters, it is possible to lower surge arrester ratings and thereby improve protective margins, resulting in a possible reduction of the insulation levels (BIL) of substation equipment. This reduction in BIL can lead to a significant reduction in the cost of substation equipment. General methods are delineated for selecting MOV surge arresters for substation protection and the resulting effect on substation equipment insulation levels.

Niebuhr, W.D.

1985-07-01T23:59:59.000Z

184

ESS 2012 Peer Review - Low Cost, Manufacturable High Voltage...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Storage for Power Flow Management and Voltage Control on an 11kV UK Distribution Network", 20th International Conference on Electricity Distribution, June 2009. S1 S2 C1 C2...

185

High power impulse magnetron sputtering: Current-voltage-time ...  

pauses between pulses !typically 20 ms". The nominal volt-age of the pulser was adjustable up to 1000 V. The arc threshold was set to 120 A. If the current exceeded this

186

Transient performance of substation structures and associated grounding systems  

Science Conference Proceedings (OSTI)

When lightning strikes an electric substation, large currents generated by the stroke flow in the above ground structures and grounding system and dissipate in the soil. The electromagnetic fields generated by such high currents may cause damage to equipment and may be dangerous to personnel working nearby. In this paper, the frequency and time domain performance of a substation subjected to a lightning strike is described and discussed. The computed scalar potentials, electric fields, and magnetic fields are presented graphically as a function of spatial coordinates, as a function of time and as a function of both. Two cases are considered. The first case examines the substation grounding system only, while the second case includes an above-ground structure as well. It is believed that the results of the second case have not been published before. A double exponential lightning surge current is injected at one corner of the substation. The response of the grounding system to the frequency domain electromagnetic spectrum of this signal is computed by a frequency domain electromagnetic field analysis software package. The temporal and spatial distributions of the electromagnetic fields inside and near the substation are obtained by an inverse Fourier transformation of all these responses. The presence of a soil with an arbitrary resistivity and permittivity is accurately taken into account. The analysis sheds some new light on the understanding of the effects which take place at the higher frequencies.

Dawalibi, F.P.; Xiong, W.; Ma, J. [Safe Engineering Services and Technologies Ltd., Montreal, Quebec (Canada)

1995-05-01T23:59:59.000Z

187

Theory and practice of dynamic voltage/frequency scaling in the high performance computing environment.  

E-Print Network (OSTI)

?? This dissertation provides a comprehensive overview of the theory and practice of Dynamic Voltage/Frequency Scaling (DVFS) in the High Performance Computing (HPC) environment. We… (more)

Rountree, Barry Louis

2010-01-01T23:59:59.000Z

188

Theory and Practice of Dynamic Voltage/Frequency Scaling in the High Performance Computing Environment .  

E-Print Network (OSTI)

??This dissertation provides a comprehensive overview of the theory and practice of Dynamic Voltage/Frequency Scaling (DVFS) in the High Performance Computing (HPC) environment. We summarize… (more)

Rountree, Barry

2009-01-01T23:59:59.000Z

189

Radio-Frequency Interference (RFI) From Extra-High- Voltage (EHV) Transmission Lines  

E-Print Network (OSTI)

The subject of radio-frequency interference (RFI) generated by high-voltage transmission lines has long been of both academic and commercial interest because of concerns about

Patrick C. Crane

2010-01-01T23:59:59.000Z

190

RECORD OF CATEGORICAL EXCLUSION DETERMINATION Ault Substation Expansion and Equipment Additions, Weld County, CO  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Ault Substation Expansion and Equipment Additions, Weld County, CO Ault Substation Expansion and Equipment Additions, Weld County, CO A. Proposed Action: Western proposes to expand the existing Ault SUbstation and add electrical equipment. The expansion would be within the existing fee-owned land. B. Number and Title of Categorical Excluison Being Applied . B4.11: Construction of electric power substations (including switching stations and support facilities) with power deliver at 230-kV or below, or modification (other than voltage increases) of existing sutstations and support facilities .. .. C. Regulatory Requirements in 10 CFR 1021.410(b): (Refer to full text in regulation ). (1) The proposed action fits within a class of actions that is listed in Appendix A or B to Subpart D. For classes of actions, listed in Appendix B, the following conditions are

191

A model for the critical voltage for electrical degradation of GaN high electron mobility transistors  

E-Print Network (OSTI)

We have found that there is a critical drain-to-gate voltage beyond which GaN high-electron mobility transistors start to degrade in electrical-stress experiments. The critical voltage depends on the detailed voltage biasing ...

Joh, Jungwoo

192

Multiple Uses of Substation Data  

Science Conference Proceedings (OSTI)

This report describes a suite of modules developed under the Multiple Uses of Substation Data project. The modules are aimed at the integration and automated analysis of data coming from several Intelligent Electronic Devices (IEDs) such as Digital Protective Relays, Digital Fault Recorders and Circuit Breaker Monitors. Once data are collected, automated analysis processes the files to extract relevant information. The modules convert non-operational data to information that may be used by variety of app...

2008-06-30T23:59:59.000Z

193

Microsoft Word - CX_Memo_MonroeSubstation.docx  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8, 2013 8, 2013 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Amy Freel Project Manager - TEP-TPP-1 Proposed Action: Monroe Substation Integrated Project Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.11 Electrical power substations and interconnection facilities Location: Snohomish County, Washington; Township 28 North, Range 7 East, Section 22 Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: The purpose of the project is to provide upgrades required as part of BPA's ongoing sustaining programs by providing voltage support and preventing power outages. The project would consist of the following activities: ï‚· Installation of two new 500-kilovolt (kV) shunt capacitor groups with current limiting

194

Wolf Point Substation, Roosevelt County, Montana  

Science Conference Proceedings (OSTI)

The Western Area Power Administration (Western), an agency of the United States Department of Energy, is proposing to construct the 115-kV Wolf Point Substation near Wolf Point in Roosevelt County, Montana (Figure 1). As part of the construction project, Western's existing Wolf Point Substation would be taken out of service. The existing 115-kV Wolf Point Substation is located approximately 3 miles west of Wolf Point, Montana (Figure 2). The substation was constructed in 1949. The existing Wolf Point Substation serves as a Switching Station'' for the 115-kV transmission in the region. The need for substation improvements is based on operational and reliability issues. For this environmental assessment (EA), the environmental review of the proposed project took into account the removal of the old Wolf Point Substation, rerouting of the five Western lines and four lines from the Cooperatives and Montana-Dakota Utilities Company, and the new road into the proposed substation. Reference to the new proposed Wolf Point Substation in the EA includes these facilities as well as the old substation site. The environmental review looked at the impacts to all resource areas in the Wolf Point area. 7 refs., 6 figs.

Not Available

1991-05-01T23:59:59.000Z

195

Unlikely Combination of Experiments with a Novel High-Voltage CIGS Photovoltaic Array (Presentation)  

DOE Green Energy (OSTI)

The goals of this study are to: (1) parameterize current-voltage (I-V) performance over a wide range of illumination and temperatures: (a) 50-1150 W/m{sup 2} irradiance, 5-65 C; (b) obtain array temperature coefficients; and (c) quantify energy production; (2) investigate high-voltage leakage currents from the CIS modules in a high-voltage array: determine dependence on moisture, temperature, and voltage bias and ascertain corrosion problems if any; and (3) study long-term power and energy production stability.

del Cueto, J. A.; Sekulic, B. R.

2006-05-01T23:59:59.000Z

196

International Electrotechnical Commission IEC 61850 Substation Development  

Science Conference Proceedings (OSTI)

The International Electrotechnical Commission Standard IEC 61580 is an emerging standard for advanced utility automation that provides a rich, hierarchical data and behavior model for use in sophisticated substation control and protection equipment. One of the important features introduced by IEC 61850 is the replacement of the wires used to exchange binary and analog information between Intelligent Electronic Devices (IEDs) with communication messages. In a conventional substation, the substation engine...

2009-03-25T23:59:59.000Z

197

Blending a Substation into its Environment  

Science Conference Proceedings (OSTI)

This report provides information about public acceptance issues as well as technical approaches available to make substations acceptable within their environments. Case studies were used to examine substation acceptance experience from utilities in different countries and areas. This is the second report in a multi-year effort to build a multi-volume library on Blending a Substation into its Environment. Volume 1 examined available literature, standards, guides, and regulations that affect the blending o...

2006-12-12T23:59:59.000Z

198

Probabilistic economic evaluation of substation seismic upgrade  

SciTech Connect

This paper presents a methodology for deciding whether or not to implement seismic design modifications at Southern California Edison's (SCE) Substation facilities. The method considers the potential for substation capability loss resulting from earthquake damage, cost of seismic modification made today, the cost of damage restoration after that modification is made, the cost of doing nothing now, and the site specific earthquake probability. Based on these findings, recommendations for seismic modifications of substation facilities could be made.

Ong, T.L.; Ensign, R.L.; Martin, D.F.; Richter, H.L. (Southern California Edison Co., Rosemead, CA (USA))

1990-04-01T23:59:59.000Z

199

High voltage bus and auxiliary heater control system for an electric or hybrid vehicle  

DOE Green Energy (OSTI)

A control system for an electric or hybrid electric vehicle includes a vehicle system controller and a control circuit having an electric immersion heater. The heater is electrically connected to the vehicle's high voltage bus and is thermally coupled to a coolant loop containing a heater core for the vehicle's climate control system. The system controller responds to cabin heat requests from the climate control system by generating a pulse width modulated signal that is used by the control circuit to operate the heater at a duty cycle appropriate for the amount of cabin heating requested. The control system also uses the heater to dissipate excess energy produced by an auxiliary power unit and to provide electric braking when regenerative braking is not desirable and manual braking is not necessary. The control system further utilizes the heater to provide a safe discharge of a bank of energy storage capacitors following disconnection of the battery or one of the high voltage connectors used to transmit high voltage operating power to the various vehicle systems. The control circuit includes a high voltage clamping circuit that monitors the voltage on the bus and operates the heater to clamp down the bus voltage when it exceeds a pre-selected maximum voltage. The control system can also be used to phase in operation of the heater when the bus voltage exceeds a lower threshold voltage and can be used to phase out the auxiliary power unit charging and regenerative braking when the battery becomes fully charged.

Murty, Balarama Vempaty (West Bloomfield, MI)

2000-01-01T23:59:59.000Z

200

High-Voltage Broadband-Over-Powerline (HV-BPL) Field Test Report | Open  

Open Energy Info (EERE)

High-Voltage Broadband-Over-Powerline (HV-BPL) Field Test Report High-Voltage Broadband-Over-Powerline (HV-BPL) Field Test Report Jump to: navigation, search Tool Summary LAUNCH TOOL Name: High-Voltage Broadband-Over-Powerline (HV-BPL) Field Test Report Focus Area: Crosscutting Topics: Policy Impacts Website: www.netl.doe.gov/smartgrid/referenceshelf/reports/HV-BPL_Final_Report. Equivalent URI: cleanenergysolutions.org/content/high-voltage-broadband-over-powerline Language: English Policies: "Deployment Programs,Financial Incentives" is not in the list of possible values (Deployment Programs, Financial Incentives, Regulations) for this property. DeploymentPrograms: Technical Assistance This reports details findings from a pilot High Voltage Broadband over Power Line (HV-BPL) program, an effort to develop a disruptive technology

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Capabilities of the High Voltage Stress Test System at the Outdoor Test Facility  

DOE Green Energy (OSTI)

We illustrate the capabilities of the High Voltage Stress Test (HVST) which operates continuously in the array field east of the Outdoor Test Facility at the National Renewable Energy Laboratory. Because we know that photovoltaic (PV) modules generating electrical power in both residential and utility-scale array installations will develop high-voltage biases approaching 600 VDC and 1,000 VDC, respectively, we expect such high voltages will result in current leakage between cells and ground, typically through the frames or mounts. We know that inevitably such leakage currents are capable of producing electrochemical corrosion that adversely impacts long-term module performance. With the HVST, we stress or operate PV modules under high-voltage bias, to characterize their leakage currents under all prevailing ambient conditions and assess performance changes emanating from high-voltage stress. We perform this test both on single modules and an active array.

del Cueto, J. A.; Trudell, D.; Sekulic, W.

2005-11-01T23:59:59.000Z

202

Guidelines for Implementing Substation Automation Using UCA-SA (Utility Communications Architecture-Substation Automation)  

Science Conference Proceedings (OSTI)

This report provides guidelines for substation engineers, information technologists, and utility managers on the information issues related to substation automation, in particular when UCA-SA (Utility Communications Architecture – Substation Automation IEC61850) standards are used. Substation automation is a new challenge for the utility industry, and these guidelines provide the overall vision as well as the specific steps that should be taken for successful implementation of this new enabling cap...

2003-11-11T23:59:59.000Z

203

Wood substation design beats out steel. [Conversion of 115-kV to 230 kV substations at Carolina Power and Light Co  

SciTech Connect

Construction plans for voltage conversion of substations can lead to new designs that are economical, reduce outage times, and result in minimum impacts on the environment. In fact, these factors prompted Carolina Power and Light Co. to make one such design its construction standard. Cost of converting a 115-kV distribution source substation to 230 kV is 20 percent less than that of replacing it with one of steel design. And because the conversion creates negligible environmental impact, getting government approval for the project is not a major problem. Steel is relegated to special situations.

Thompson, C.M.

1976-09-15T23:59:59.000Z

204

Substation evaluation using Diagnostic Logic System (DIALOG)  

Science Conference Proceedings (OSTI)

This project investigated the feasibility of applying a Diagnostic Logic System (DIAGLOG) to evaluate substation operation. The purpose was to see if a determination can be made as to whether the equipment in a substation operated correctly or not when an operating event occurred. The work was directed toward modifying an already proven diagnostic system to create a simplified procedure for describing the operation of substation equipment. Special operating tables or modules of logic were identified for describing relay and breaker operations. The resulting model composed of all the modules connected together is used to evaluate the actual observations available at the substation, and to compare them with what the substation should have produced. The report covers the diagnostic approach used, information on how to construct the modules and examples of diagnosis. Also covered are discussions on the special features of substations that offer a challenge to performing diagnostics. Included in the report are the results of modeling a typical substation and several notes are provided along with an initial library of typical modules which were developed in modeling one of the substations belonging to the Pacific Gas and Electric Company. This substation served as a feasibility demonstrator. 15 figs.

Andre, W.L.

1989-08-01T23:59:59.000Z

205

Assessment and Evaluation of Next Generation High-Voltage DC Technologies—Phase 2  

Science Conference Proceedings (OSTI)

As an established technology for bulk power transmission, high-voltage direct current (HVDC) power transmission is being used worldwide, and more than 100 schemes are operating at present. Advances in voltage sourced converter (VSC) technologies and power electronic devices with use of insulated-gate bipolar transistors (IGBTs) will provide improved system performance and reliability. Also, the present highest operating voltage is +/- 800 kV as China and India are building +/- 800-kV lines. Anticipating ...

2009-12-17T23:59:59.000Z

206

Surge Suppression of Protection Equipment in UHV Substation  

Science Conference Proceedings (OSTI)

This paper analyses the producing mechanism of surge at protection equipment's ports, surge test of high level is done for signal ports, communication ports and power ports of specific protection equipment sample. Evaluation is accomplished for the methods ... Keywords: protection equipment, substation, surge suppression

Ma Haijie

2009-10-01T23:59:59.000Z

207

SECONDARY ELECTRON TRAJECTORIES IN HIGH-GRADIENT VACUUM INSULATORS WITH FAST HIGH-VOLTAGE PULSES  

Science Conference Proceedings (OSTI)

Vacuum insulators composed of alternating layers of metal and dielectric, known as high-gradient insulators (HGIs), have been shown to withstand higher electric fields than conventional insulators. Primary or secondary electrons (emitted from the insulator surface) can be deflected by magnetic fields from external sources, the high-current electron beam, the conduction current in the transmission line, or the displacement current in the insulator. These electrons are deflected either toward or away from the insulator surface and this affects the performance of the vacuum insulator. This paper shows the effects of displacement current from short voltage pulses on the performance of high gradient insulators. Generally, vacuum insulator failure is due to surface flashover, initiated by electrons emitted from a triple junction. These electrons strike the insulator surface thus producing secondary electrons, and can lead to a subsequent electron cascade along the surface. The displacement current in the insulator can deflect electrons either toward or away from the insulator surface, and affects the performance of the vacuum insulator when the insulator is subjected to a fast high-voltage pulse. Vacuum insulators composed of alternating layers of metal and dielectric, known as high-gradient insulators (HGIs), have been shown to withstand higher electric fields than conventional insulators. HGIs, being tolerant of the direct view of high-current electron and ion beams, and having desirable RF properties for accelerators, are a key enabling technology for the dielectric-wall accelerators (DWA) being developed at Lawrence Livermore National Laboratory (LLNL). Characteristically, insulator surface breakdown thresholds go up as the applied voltage pulse width decreases. To attain the highest accelerating gradient in the DWA, short accelerating voltage pulses are only applied locally, along the HGI accelerator tube, in sync with the charged particle bunch, and the effects of displacement current on trajectories of electrons emitted from HGI surface are particularly interesting. This paper presents simulated electron trajectories experiencing either constant or short-duration applied voltage pulses. Comparisons of these trajectories clearly indicate the importance of the voltage pulse shape, especially the rise time, in the flashover initiation process for HGIs.

Chen, Y; Blackfield, D; Nelson, S D; Poole, B

2010-04-21T23:59:59.000Z

208

Summary of transient high-voltage calculations for the FRX-C experiment  

Science Conference Proceedings (OSTI)

Calculations of the electrical circuit equations are performed over a wide range of parameters corresponding to the FRX-C field-reversed THETA-pinch experiment at Los Alamos. Without any plasma or external damping, serious voltage doubling and quadrupling of the main capacitor bank charge voltage are observed. These oscillating high voltages are found to be adequately suppressed by the strategic placement of external snubber circuitry. On the other hand, no doubling of the THETA-pinch preionization bank charge voltage is found. Calculations of the equations for the z-pinch preionization circuit are also performed.

Kewish, R.W. Jr.; Rej, D.J.

1982-06-01T23:59:59.000Z

209

Grounding Analysis in Heterogeneous Soil Models: Application to Underground Substations  

E-Print Network (OSTI)

Grounding Analysis in Heterogeneous Soil Models: Application to Underground Substations Ignasi in forthcoming publications. Keywords-grounding analysis; earthing analysis, underground substations; I to a river (at substations next to hydroelectric dams), or the grounding system of a buried electrical

Colominas, Ignasi

210

Light-weight DC to very high voltage DC converter  

DOE Patents (OSTI)

A DC-DC converter capable of generating outputs of 100 KV without a transformer comprises a silicon opening switch (SOS) diode connected to allow a charging current from a capacitor to flow into an inductor. When a specified amount of charge has flowed through the SOS diode, it opens up abruptly; and the consequential collapsing field of the inductor causes a voltage and current reversal that is steered into a load capacitor by an output diode. A switch across the series combination of the capacitor, inductor, and SOS diode closes to periodically reset the SOS diode by inducing a forward-biased current.

Druce, Robert L. (Union City, CA); Kirbie, Hugh C. (Dublin, CA); Newton, Mark A. (Livermore, CA)

1998-01-01T23:59:59.000Z

211

Light-weight DC to very high voltage DC converter  

DOE Patents (OSTI)

A DC-DC converter capable of generating outputs of 100 KV without a transformer comprises a silicon opening switch (SOS) diode connected to allow a charging current from a capacitor to flow into an inductor. When a specified amount of charge has flowed through the SOS diode, it opens up abruptly; and the consequential collapsing field of the inductor causes a voltage and current reversal that is steered into a load capacitor by an output diode. A switch across the series combination of the capacitor, inductor, and SOS diode closes to periodically reset the SOS diode by inducing a forward-biased current. 1 fig.

Druce, R.L.; Kirbie, H.C.; Newton, M.A.

1998-06-30T23:59:59.000Z

212

Seismic Studies of Substation Equipment: Progress Report  

Science Conference Proceedings (OSTI)

IEEE Standard 693, Recommended Practice for Seismic Design of Substations, is used by electric power utilities to qualify substation equipment for seismic movements. Deficiencies exist in the present standard, and information is unavailable for dynamic response that may be used to better analyze equipment and permit equipment evaluation in case of limited configuration changes, such as insulator substitution.

2009-09-28T23:59:59.000Z

213

Life Extension Guidelines for Other Substation Equipment  

Science Conference Proceedings (OSTI)

Utilities are under increasing pressure to maintain service reliability while operating aging transmission substations with tighter, leaner maintenance budgets and fewer experienced personnel. A structured life extension program can help utilities make equipment maintenance, replacement, and refurbishment decisions that ensure safe, reliable, cost-effective operation of transmission substation equipment.BackgroundThe ...

2012-12-12T23:59:59.000Z

214

Life Extension Guidelines for Substation Equipment  

Science Conference Proceedings (OSTI)

Utilities are under increasing pressure to maintain service reliability while operating aging transmission substations with leaner maintenance budgets and fewer experienced personnel. A structured life extension program can help utilities make equipment maintenance, replacement, and refurbishment decisions that ensure safe, reliable, cost-effective operation of transmission substation equipment. EPRI's life extension guidelines for substationsfirst published in 1995 and periodically revisedsupport curre...

2010-12-22T23:59:59.000Z

215

Life Extension Guidelines for Other Substation Equipment  

Science Conference Proceedings (OSTI)

Utilities are under increasing pressure to maintain service reliability while operating aging transmission substations with tighter, leaner maintenance budgets and fewer experienced personnel. A structured life extension program can help utilities make equipment maintenance, replacement, and refurbishment decisions that ensure safe, reliable, cost-effective operation of transmission substation equipment.BackgroundEPRI’s Life Extension Guidelines for ...

2013-12-20T23:59:59.000Z

216

Cyber Security in Smart Grid Substations  

E-Print Network (OSTI)

Cyber Security in Smart Grid Substations Thijs Baars Lucas van den Bemd Michail Theuns Robin van.089 3508 TB Utrecht The Netherlands #12;CYBER SECURITY IN SMART GRID SUBSTATIONS Thijs Baars T.Brinkkemper@uu.nl Abstract. This report describes the state of smart grid security in Europe, specifically the Netherlands

Utrecht, Universiteit

217

Investigation of electric fields of EHV substations  

SciTech Connect

60-Hz and 24-kHz capacitive and monopole probes and testing techniques were developed for full-scale and model ground level electric field strength measurements for EHV substations. A model of an existing 345-kV substation was designed and built. The model was energized using a three phase 24-kHz regulated source. Comparison of corresponding test points shows that the agreement between substation and model measurements is good. Large amounts of model test data can be taken in a short time. Energized scale models can be used in a substation design tool so that the electric field may be mapped and, if necessary, modified. A successful and useful predictive tool has been developed that can handle the three-dimensional complex substation electric fields. Further development will result in a widely available and flexible analog design tool.

Sebo, S.A.; Caldecott, R.

1977-01-01T23:59:59.000Z

218

An Electronic Voltage Transformer Based on WLAN Technology  

Science Conference Proceedings (OSTI)

An electronic voltage transformer based on WLAN technology is developed for adapting to the development trends of substations’ synthesis automation. The transformer is composed of voltage-to-current conversion unit, signal processing unit and data ... Keywords: electronic voltage transformer, voltage-to-current conversion, WLAN technology, digital interface, wireless communication

Jianqin Feng; Qingming Wang; Fen Niu; Guangzhao Cui; Anping Zheng

2010-03-01T23:59:59.000Z

219

An Annotated Bibliography of High-Voltage Direct-Current Transmission and Flexible AC Transmission (FACTS) Devices, 1991-1993.  

SciTech Connect

References are contained for HVDC systems, converter stations and components, overhead transmission lines, cable transmission, system design and operations, simulation of high voltage direct current systems, high-voltage direct current installations, and flexible AC transmission system (FACTS).

Litzenberger, Wayne; Lava, Val

1994-08-01T23:59:59.000Z

220

Radio-frequency powered glow discharge device and method with high voltage interface  

DOE Patents (OSTI)

A high voltage accelerating potential, which is supplied by a high voltage direct current power supply, is applied to the electrically conducting interior wall of an RF powered glow discharge cell. The RF power supply desirably is electrically grounded, and the conductor carrying the RF power to the sample held by the probe is desirably shielded completely excepting only the conductor's terminal point of contact with the sample. The high voltage DC accelerating potential is not supplied to the sample. A high voltage capacitance is electrically connected in series between the sample on the one hand and the RF power supply and an impedance matching network on the other hand. The high voltage capacitance isolates the high DC voltage from the RF electronics, while the RF potential is passed across the high voltage capacitance to the plasma. An inductor protects at least the RF power supply, and desirably the impedance matching network as well, from a short that might occur across the high voltage capacitance. The discharge cell and the probe which holds the sample are configured and disposed to prevent the probe's components, which are maintained at ground potential, from bridging between the relatively low vacuum region in communication with the glow discharge maintained within the cell on the one hand, and the relatively high vacuum region surrounding the probe and cell on the other hand. The probe and cell also are configured and disposed to prevent the probe's components from electrically shorting the cell's components. 11 figures.

Duckworth, D.C.; Marcus, R.K.; Donohue, D.L.; Lewis, T.A.

1994-06-28T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Radio-frequency powered glow discharge device and method with high voltage interface  

DOE Patents (OSTI)

A high voltage accelerating potential, which is supplied by a high voltage direct current power supply, is applied to the electrically conducting interior wall of an RF powered glow discharge cell. The RF power supply desirably is electrically grounded, and the conductor carrying the RF power to the sample held by the probe is desirably shielded completely excepting only the conductor's terminal point of contact with the sample. The high voltage DC accelerating potential is not supplied to the sample. A high voltage capacitance is electrically connected in series between the sample on the one hand and the RF power supply and an impedance matching network on the other hand. The high voltage capacitance isolates the high DC voltage from the RF electronics, while the RF potential is passed across the high voltage capacitance to the plasma. An inductor protects at least the RF power supply, and desirably the impedance matching network as well, from a short that might occur across the high voltage capacitance. The discharge cell and the probe which holds the sample are configured and disposed to prevent the probe's components, which are maintained at ground potential, from bridging between the relatively low vacuum region in communication with the glow discharge maintained within the cell on the one hand, and the relatively high vacuum region surrounding the probe and cell on the other hand. The probe and cell also are configured and disposed to prevent the probe's components from electrically shorting the cell's components.

Duckworth, Douglas C. (Knoxville, TN); Marcus, R. Kenneth (Clemson, SC); Donohue, David L. (Vienna, AT); Lewis, Trousdale A. (Oak Ridge, TN)

1994-01-01T23:59:59.000Z

222

Telecontrol of Ultra-High Voltage Electron Microscope over Global IPv6 Network  

Science Conference Proceedings (OSTI)

Osaka University has an Ultra-High VoltageElectron Microscope (UHVEM) which can provide highquality specimen images for worldwide researchers. Forusability improvements, we have worked on thetelecontrol of the UHVEM. In this paper, we would liketo introduce ...

Toyokazu Akiyama; Shinji Shimojo; Shojiro Nishio; Yoshinori Kitatsuji; Steven Peltier; Thomas Hutton; Fang-Pang Lin

2003-01-01T23:59:59.000Z

223

Ground potential rise characteristics of urban step-down substations fed by power cables - A practical example  

Science Conference Proceedings (OSTI)

This paper shows some special ground potential rise characteristics of substations fed by power cables. These characteristics were detected during the study of the interconnected ground system of 14 step-down urban substations fed by the 138 kV underground cable network serving the South Zone of Rio de Janeiro city in Brazil. As this type of system is very common in large cities, the subject can be of general interest for the industry. It was verified that when a fault occurs at a ''cable substation'' (a substation fed exclusively by power cables), almost no ground potential effects were detected at the faulted substation or at the other ''cable substations'' of the 138 kV network. However, high values of ground potential occurred at the ''transition substations'' (substations in which the power cables are connected to overhead 138 kV transmission lines, with steel groundwires). That ground potential was enough to produce shocks and equipment damage in certain ''transition substations''. It was verified that this problem has no relation with potential transfer. The paper shows also that the utilization of overhead lines with ACSR groundwires on the initial spans closer to the ''transition substation'' would be enough to avoid the problem. Even if the ACSR conductor is used only at the initial section of one of the lines, a reduction of the problem would be obtained. The paper shows also that the utilization of ACSR ground-wires near the ''transition substations'' contributes to reduce the amount of the copper necessary to control step, touch and mess potentials in these substations. Additional mitigation procedures are also examined in the paper.

Sobral, S.T. (IESA - Internacional de Engenharia S.A. (BR)); Barbosa, J.O.; Numes, J.V.C.; Chinelli, E.; Netto, A.F. (Light - Servicos de Eletricidade S.A. (BR)); Costa, V.S.; Campos, J.H. (Eletrobras - Centrais Eletricas, Brasileiras (BR))

1988-10-01T23:59:59.000Z

224

3430 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 61, NO. 8, OCTOBER 2012 Experimental Validation of High-Voltage-Ratio  

E-Print Network (OSTI)

Validation of High-Voltage-Ratio Low-Input-Current-Ripple Converters for Hybrid Fuel Cell Supercapacitor

Simões, Marcelo Godoy

225

Cermet insert high voltage holdoff improvement for ceramic/metal vacuum devices  

DOE Patents (OSTI)

An improved metal-to-ceramic seal is provided wherein the ceramic body of the seal contains an integral region of cermet material in electrical contact with the metallic member, e.g., an electrode, of the seal. The seal is useful in high voltage vacuum devices, e.g., vacuum switches, and increases the high-voltage holdoff capabilities of such devices. A method of fabricating such seals is also provided.

Ierna, W.F.

1986-03-11T23:59:59.000Z

226

Piezoelectric based high voltage power simulator for implantation  

Science Conference Proceedings (OSTI)

It is based on resonant method that allows the piezoelectric transformer to generate a ... The device is small and with high power density and high efficiency

227

Reevaluation of IEEE and IEC Substation Design, Operations, and Maintenance Standards Considering Increased Fault Currents  

Science Conference Proceedings (OSTI)

The ever-increasing demand for utility substations to pass higher and higher levels of throughput power has the consequence of driving up levels of short circuit (SC) currents from 63 kA to as high as 100 kA. Knowing whether substation bus structures and electrical equipment are capable of safely passing these higher levels of currents is a pressing need of substation personnel responsible for design, operation, and maintenance of station assets. This report presents results of a preliminary study ...

2012-12-04T23:59:59.000Z

228

High voltage bus and auxiliary heater control system for an electric or hybrid vehicle  

DOE Patents (OSTI)

A control system for an electric or hybrid electric vehicle includes a vehicle system controller and a control circuit having an electric immersion heater. The heater is electrically connected to the vehicle's high voltage bus and is thermally coupled to a coolant loop containing a heater core for the vehicle's climate control system. The system controller responds to cabin heat requests from the climate control system by generating a pulse width modulated signal that is used by the control circuit to operate the heater at a duty cycle appropriate for the amount of cabin heating requested. The control system also uses the heater to dissipate excess energy produced by an auxiliary power unit and to provide electric braking when regenerative braking is not desirable and manual braking is not necessary. The control system further utilizes the heater to provide a safe discharge of a bank of energy storage capacitors following disconnection of the battery or one of the high voltage connectors used to transmit high voltage operating power to the various vehicle systems. The control circuit includes a high voltage clamping circuit that monitors the voltage on the bus and operates the heater to clamp down the bus voltage when it exceeds a pre-selected maximum voltage. The control system can also be used to phase in operation of the heater when the bus voltage exceeds a lower threshold voltage and can be used to phase out the auxiliary power unit charging and regenerative braking when the battery becomes fully charged.

Murty, Balarama Vempaty (West Bloomfield, MI)

2000-01-01T23:59:59.000Z

229

Substation reliability -- Practical application and system approach  

SciTech Connect

Practical application of reliability analysis was made for the comparison of alternate line and bus arrangements of a future transmission substation with potential savings of up to $3.6 M. The paper describes how both the substation and the power system were simulated by using computer programs STAREL and COMREL. It presents the method used to obtain the most accurate estimates for the outage data of the system components. Finally, it expresses the results with simple reliability indices which can be meaningful for management. The results of the study show the need to include the reliability of the transmission system in a substation reliability evaluation.

Save, P. [Southern California Edison Co., Rosemead, CA (United States)

1995-02-01T23:59:59.000Z

230

High-voltage crowbar circuit with cascade-triggered series ignitrons  

DOE Patents (OSTI)

A series string of ignitrons for switching a large current at high voltage to ground. Switching is initiated by means of a negative trigger pulse applied to the cathode of the lowest voltage level ignitron next to ground to draw ground current through diodes in the ignitor circuit. The trigger pulse is applied thereby to the next higher ignitron cathode and sequentially to the remainder of the ignitrons in the string through diodes in respective ignitor circuits. Full line voltage is held off of nonconducting diodes and ignitrons by means of varistors.

Baker, William R. (Orinda, CA)

1980-01-01T23:59:59.000Z

231

High-voltage crowbar circuit with cascade-triggered series ignitrons  

DOE Patents (OSTI)

A series string of ignitrons for switching a large current at high voltage to ground. Switching is initiated by means of a negative trigger pulse applied to the cathode of the lowest voltage level ignitron next to ground to draw ground current through diodes in the ignitor circuit. The trigger pulse is applied thereby to the next higher ignitron cathode and sequentially to the remainder of the ignitrons in the string through diodes in respective ignitor circuits. Full line voltage is held off of nonconducting diodes and ignitrons by means of varistors. 1 fig.

Baker, W.R.

1980-11-04T23:59:59.000Z

232

Operational Results of Pulse Shaping Techniques for the High Voltage Convertor Modulator  

Science Conference Proceedings (OSTI)

The High Voltage Converter Modulators (HVCMs) are used to power the RF klystrons used throughout the accelerator systems at Spallation Neutron Source (SNS). The output voltage of the HVCM has significant droop and ripple which, combined with low level RF (LLRF) system limitations, affect performance and efficiency of accelerator cavities. In conjunction with the progress in development of the new HVCM controller, different pulse modulation techniques were implemented and studied on the test modulator. This paper discusses the results of implementation of frequency modulation and phase modulation on output voltage. Operational data, including full average power operation, of test modulator is also discussed. Future plans for the new modulation scheme will be presented.

Patel, Gunjan P [ORNL; Anderson, David E [ORNL; Solley, Dennis J [ORNL; Wezensky, Mark W [ORNL

2012-01-01T23:59:59.000Z

233

GaAs series connected photovoltaic converters for high voltage capacitor charging applications  

DOE Green Energy (OSTI)

This report describes the design features of series connected photovoltaic arrays which will be required to charge capacitors to relatively high (400V) voltages in time periods on the order of 1 microsecond. The factors which determine the array voltage and the capacitor charge time are given. Individual element junction designs, along with an interconnect scheme, and a semiconductor process to realize them are presented. Finally, the input laser optical required to meet the requirements is determined.

Rose, B.H.

1997-09-01T23:59:59.000Z

234

The progress and challenges of threshold voltage control of high-k/metal-gated devices for advanced technologies (Invited Paper)  

Science Conference Proceedings (OSTI)

This paper discusses recent progress in and challenges of threshold voltage control for advanced high-k/metal-gated (HKMG) devices. It presents the impact on threshold voltage (V"t) control of incorporating La and Al into HKMG devices. A dipole moment ... Keywords: CMOS, Capping layer, EOT, High-k, Metal gate, Threshold voltage control

Hsing-Huang Tseng; Paul Kirsch; C. S. Park; Gennadi Bersuker; Prashant Majhi; Muhammad Hussain; Raj Jammy

2009-07-01T23:59:59.000Z

235

Network Security for Substation Automation Systems  

Science Conference Proceedings (OSTI)

The protection of critical infrastructure against electronic and communication network based attacks becomes more and more important. This work investigates the threat of network-based attacks on substations, the nodes of the electric power grid. Three ...

Martin Naedele; Dacfey Dzung; Michael Stanimirov

2001-09-01T23:59:59.000Z

236

Coordination of a distribution level continuously controlled compensation device with existing substation equipment for long term VAR management  

SciTech Connect

The implementation of a continuously controlled reactive compensation device, such as an SVC or a static condenser'' (STATCON), in a distribution-level substation provides opportunities to improve power quality and reliability due to the speed of response of such a device. Further benefits can be gained by coordinating the reactive compensation device and its related controls with other substation voltage control equipment, such as load tap changing (LTC) transformers and mechanically-switched capacitors. The results presented in this paper illustrate the impact that a [+-] 12 Mvar STATCON can have on a 150 MW, 12.5 kV load bus, in the Commonwealth Edison power system. Three control concepts for various levels of integration of the substation STATCON, LTCs, and mechanically-switched capacitors are presented. With broader application of SVCs and STATCONs at distribution substations, various other control strategies may also evolve.

Paserba, J.J.; Leonard, D.J.; Miller, N.W. (GE Industrial and Power Systems, Schenectady, NY (United States). Power Systems Engineering Dept.); Lauby, M.G. (Electric Power Research Inst., Palo Alto, CA (United States)); Naumann, S.T. (Commonwealth Edison Co., Chicago, IL (United States)); Sener, F.P. (PHE Consulting, Brecksville, OH (United States))

1994-04-01T23:59:59.000Z

237

STLOAD 1.0, Substation Equipment Thermal Loading Program  

Science Conference Proceedings (OSTI)

The Substation Equipment Thermal Loading Program, STLOAD Version 1.0 software is intended for use by substation engineers for the purpose of establishing thermal ratings for and making diagnostic evaluations of substation equipment. STLOAD 1.0 software calculates substation equipment operating temperatures and thermal ratings based on user-specified physical parameters for the equipment and user-specified load and air temperature data. Substation equipment that can be modeled using STLOAD includes strain...

2006-03-15T23:59:59.000Z

238

High-voltage DC transmission: a power electronics workhorse  

Science Conference Proceedings (OSTI)

Thyristor-based HVDC converter technology is used for highly reliable power transfer across natural or national boundaries or between AC systems designed for different frequencies or incompatible frequency controls. The author discusses the benefits ...

N. G. Hingorani

1996-04-01T23:59:59.000Z

239

Survey of Substation Equipment Access Control Policies  

Science Conference Proceedings (OSTI)

Utility management and control of access to substations and equipment can help prevent not only unauthorized access by outside agents with ill intent, but also erroneous access to, or erroneous operation of, utility equipment by utility personnel.  This report provides the results of an EPRI–sponsored research project to identify how utilities manage access to transmission and distribution substations and equipment. BackgroundThe enhanced ...

2012-11-20T23:59:59.000Z

240

Assessment of Wireless Technologies in Substation Functions  

Science Conference Proceedings (OSTI)

New wireless technologies are becoming available that may be applied to electric substations to meet the growing needs for physical security and increased communications. These new technologies must be carefully evaluated to ensure that they meet the purposes for which they are intended. In particular, the technologies must function at remote locations and within the electrically noisy environments of substations. This report surveys and assesses the strengths and weaknesses of wireless technologies used...

2006-03-27T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Proceedings from EPRI's XV Substation Diagnostic Conference  

Science Conference Proceedings (OSTI)

The EPRI Substation Equipment Diagnostics Conference XV convened in Orlando, Florida, from March 2 5, 2008, to assemble, assess, and communicate information on the latest diagnostic techniques, monitoring devices, and systems for substation equipment. This conference was the fifteenth in a series that began in 1992. It focused on the latest monitoring and diagnostic techniques being developed by EPRI and others in research programs, as well as equipment and programs now available and in service by electr...

2008-04-28T23:59:59.000Z

242

Substation Equipment Asset Management: Utility Experience Sharing  

Science Conference Proceedings (OSTI)

Utilities have been maintaining substation equipment reliably since the industry’s inception, but now many are facing increased challenges to reduce operating and maintenance costs without adversely affecting service levels. In this setting, utilities may benefit from knowing which programs and techniques their peers have implemented. To that end, the Electric Power Research Institute (EPRI) conducted a series of industry surveys assessing key substation equipment maintenance practices. As ...

2013-12-18T23:59:59.000Z

243

Experimental Results from Droop Compensation for the High Voltage Converter Modulators  

Science Conference Proceedings (OSTI)

The High Voltage Convertor Modulators are used to power the RF klystrons used throughout the linear accelerator at the Spallation Neutron Source. The output voltage of the modulator has significant voltage droop and ripple which, combined with low level RF system limitations, affect performance and stability of the accelerator cavities. In conjunction with the progress in the development of the new controller, different modulation techniques were implemented and studied on the test modulator. This paper discusses experimental results from implementation of different modulation schemes has on the modulator output voltage pulse. Thermal measurements were carried out to determine the effect of these modulations schemes on long term reliability of the modulator. Future plans are also discussed.

Patel, Gunjan P [ORNL; Anderson, David E [ORNL; Peplov, Vladimir V [ORNL; Saethre, Robert B [ORNL; Solley, Dennis J [ORNL; Wezensky, Mark W [ORNL

2013-01-01T23:59:59.000Z

244

Field Guide Updates for 2011: Volume 1 - Compressors for High-Voltage Circuit Breakers, Volume 2 - Lubrication of High-Voltage Circu it Breakers  

Science Conference Proceedings (OSTI)

High-voltage circuit breakers (HVCBs) perform essential protection and control functions on power transmission networks. Circuit breakers have multiple components that must operate in concert in order for the breaker to perform properly. If one component, such as the air or hydraulic system, does not operate correctly, the circuit breaker may misoperate or fail, possibly resulting in equipment damage or an outageboth expensive consequences. To help utilities prevent such undesirable events, this field gu...

2011-12-12T23:59:59.000Z

245

Connecting Renewables Directly to the Grid: Resilient Multi-Terminal HVDC Networks with High-Voltage High-Frequency Electronics  

SciTech Connect

GENI Project: GE is developing electricity transmission hardware that could connect distributed renewable energy sources, like wind farms, directly to the grid—eliminating the need to feed the energy generated through intermediate power conversion stations before they enter the grid. GE is using the advanced semiconductor material silicon carbide (SiC) to conduct electricity through its transmission hardware because SiC can operate at higher voltage levels than semiconductors made out of other materials. This high-voltage capability is important because electricity must be converted to high-voltage levels before it can be sent along the grid’s network of transmission lines. Power companies do this because less electricity is lost along the lines when the voltage is high.

None

2012-01-23T23:59:59.000Z

246

Dual design resistor for high voltage conditioning and transmission lines  

DOE Patents (OSTI)

A dual resistor for eliminating the requirement for two different value resistors. The dual resistor includes a conditioning resistor at a high resistance value and a run resistor at a low resistance value. The run resistor can travel inside the conditioning resistor. The run resistor is capable of being advanced by a drive assembly until an electrical path is completed through the run resistor thereby shorting out the conditioning resistor and allowing the lower resistance run resistor to take over as the current carrier.

Siggins, Timothy Lynn (Newport News, VA); Murray, Charles W. (Hayes, VA); Walker, Richard L. (Norfolk, VA)

2007-01-23T23:59:59.000Z

247

MFTF 230 kV pulsed power substation  

SciTech Connect

The Mirror Fusion Test Facility (MFTF) currently under construction at the Lawrence Livermore Laboratory includes a Sustaining Neutral Beam Power Supply System (SNBPSS) consisting of 24 power-supply sets. The System will operate in long pulses (initially .5 seconds and eventually 30 seconds) at high power (200 MW), which will necessitate a large source of ac power. To meet this requirement, a new 230-kV substation is also being built at LLL. The constraints of cost, equipment protection, short operating lifetime (10 years), and reliability dictated a unique substation design. Its unusual features include provisions for fast fault detection and tripping, a capability for limiting ground fault current, low impedance, and economical design.

Wilson, J.H.

1979-11-12T23:59:59.000Z

248

Unlikely Combination of Experiments With a Novel High-Voltage CIGS Photovoltaic Array: Preprint  

DOE Green Energy (OSTI)

A new high-voltage array comprising bipolar strings of copper indium gallium diselenide (CIGS) photovoltaic (PV) modules was inaugurated in 2005. It is equipped with a unique combination of tests, which likely have never before been deployed simultaneously within a single array: full current-voltage (I-V) traces, high-voltage leakage current measurements, and peak-power tracking or temporal stepped-bias profiling. The array nominally produces 1 kW power at 1 sun. The array's electrical characteristics are continuously monitored and controlled with a programmable electronic load interfaced to a data acquisition system (DAS), that also records solar and meteorological data. The modules are mounted with their frames electrically isolated from earth ground, in order to facilitate measurement of the leakage currents that arise between the high voltage bias developed in the series-connected cells and modules and their mounting frames. Because the DAS can perform stepped biasing of the array as a function of time, synchronous detection of the leakage current data with alternating bias is available. Leakage current data and their dependence on temperature and voltage are investigated. Array power data are analyzed across a wide range of varying illuminations and temperatures from the I-V traces. Array performance is also analyzed from an energy output perspective using peak-power tracking data.

del Cueto, J. A.; Sekulic, B. R.

2006-05-01T23:59:59.000Z

249

Cyber Security in Smart Grid Substations  

E-Print Network (OSTI)

Abstract. This report describes the state of smart grid security in Europe, specifically the Netherlands, and the cyber security of substations in particular. The focus of this study is the perception of risks and threats in smart grid cyber security and the international standards implemented in smart grids. The created overview is based on semi-structured interviews with 13 experts originating from eight different European countries. These participants are employed at electricity producers, grid operators, technology consultants and technology providers in the utilities sector. Their expertise ranges from information security to electricity grids, specifically smart grid security. Some of them are members of smart grid security related standard committees. The key results of the state of practice are the following: 1. The interconnectivity of the smart grid with multiple stakeholders and European colleagues is indicated as the biggest threat to the security of the smart grid. 2. Another often mentioned threat is awareness. The experts generally indicate that awareness within top management is high. However, personnel on lower levels are reluctant to incorporate security in their processes. 3. All organizations are in a certain stage of implementing standards, the ISO27000 series

Thijs Baars; Lucas Van Den Bemd; Michail Theuns; Robin Van Den Akker; Machiel Schönbeck; Sjaak Brinkkemper; Thijs Baars; Lucas Van Den Bemd; Michail Theuns; Robin Van Den Akker; Machiel Schönbeck; Sjaak Brinkkemper

2012-01-01T23:59:59.000Z

250

Lightning protection requirements of SF/sub 6/ substation determined by hybrid simulator. [115/345 kv station  

SciTech Connect

The development of a hybrid computer simulation which can provide the type and quantity of data necessary for determining the behavior of lightning-caused surges traveling through substations is discussed. Results from a specific application on a 115-kV/345-kV station are presented. The results show that the simulation of SF/sub 6/ substations during lightning-caused surges is ideally accomplished by hybrid computer. The quantity of data for complete substation analysis may be gathered efficiently. In addition, digital graphical summaries provide quick insight into substation behavior. The application of this method to simple configurations has shown the previous assumptions must be carefully reviewed. For example, it is shown by computer simulation and analytical hand calculation that the surges with the steepest wave fronts may not produce the highest substation voltages. It is concluded that this hybrid simulation is an excellent tool in the determination of SF/sub 6/ substation response to lightning-caused surges. (LCL)

Tranen, J.D. (New England Electric System, Westborough, MA); Hedin, R.A.; Minnick, J.J.; Priest, K.W.

1977-01-01T23:59:59.000Z

251

Effect of high solenoidal magnetic fields on breakdown voltages of high vacuum 805 MHz cavities  

DOE Green Energy (OSTI)

There is an on going international collaboration studying the feasibility and cost of building a muon collider or neutrino factory [1,2]. An important aspect of this study is the full understanding of ionization cooling of muons by many orders of magnitude for the collider case. An important muon ionization cooling experiment, MICE [3], has been proposed to demonstrate and validate the technology that could be used for cooling. Ionization cooling is accomplished by passing a high-emittance muon beam alternately through regions of low Z material, such as liquid hydrogen, and very high accelerating RF Cavities within a multi-Tesla solenoidal field. To determine the effect of very large solenoidal magnetic fields on the generation of dark current, x-rays and on the breakdown voltage gradients of vacuum RF cavities, a test facility has been established at Fermilab in Lab G. This facility consists of a 12 MW 805 MHz RF station and a large warm bore 5 T solenoidal superconducting magnet containing a pill box type cavity with thin removable window apertures. This system allows dark current and breakdown studies of different window configurations and materials. The results of this study will be presented. The study has shown that the peak achievable accelerating gradient is reduced by a factor greater than 2 when solenoidal field of greater than 2 T are applied to the cavity.

Moretti, A.; Bross, A.; Geer, S.; Qian, Z.; /Fermilab; Norem, J.; /Argonne; Li, D.; Zisman, M.; /LBL, Berkeley; Torun, Y.; /IIT, Chicago; Rimmer, R.; /Jefferson Lab; Errede,; /Illinois U., Urbana

2005-10-01T23:59:59.000Z

252

Cooperative frequency control with a multi-terminal high-voltage DC network  

Science Conference Proceedings (OSTI)

We consider frequency control in power systems made of several non-synchronous AC areas connected by a multi-terminal high-voltage direct current (HVDC) grid. We propose two HVDC control schemes to make the areas collectively react to power imbalances, ... Keywords: Decentralized control, Frequency control, HVDC systems, Power system control

Alain Sarlette; Jing Dai; Yannick Phulpin; Damien Ernst

2012-12-01T23:59:59.000Z

253

Instantaneous Rainfall Rate: Its Measurement and Its Influence on High-Voltage Transmission Lines  

Science Conference Proceedings (OSTI)

When a high-voltage transmission line is exposed to rain there is generally a small amount of corona activity at the surface of the conductors. This activity usually results in a power loss and the generation of audible and radio noise. While the ...

Harold Kirkham

1980-01-01T23:59:59.000Z

254

LPAT: An interactive simulation tool for assessing the lightning performance of Hellenic high voltage transmission lines  

Science Conference Proceedings (OSTI)

The paper presents the Lightning Performance Assessment Tool (LPAT), an interactive simulation tool which assesses the lightning performance of high voltage transmission lines. The LPAT design was based on a recently published methodology that has been ... Keywords: Lightning performance, Optical transient density, Overhead transmission lines, Simulation, Software tool, User interface

P. Karampelas; L. Ekonomou; S. Panetsos; G. E. Chatzarakis

2011-01-01T23:59:59.000Z

255

A new VME based high voltage power supply for large experiments  

SciTech Connect

A new VME based high voltage power supply has been developed for the D{O} experiment at Fermilab. There are three types of supplies delivering up to {plus_minus}5.6 kV at 1.0 mA or +2.0 kV at 3.0 mA with a set accuracy of 1.5 V and extremely low voltage ripples. Complete computer control has allowed many special features to be developed for the supply, including user-defined control land monitor groups, variable ramp rates, and advanced histogram and graphic functions. 3 refs.

Ahn, S.C.; Angstadt, R.D.; Droege, T.F.; Johnson, M.E.; MacKinnon, B.A.; McNulty, S.E.; Shea, M.F.; Thompson, R.N.; Watson, M.M. [Fermi National Accelerator Lab., Batavia, IL (United States); Franzini, P. [Columbia Univ., New York, NY (United States); Jones, A.A. [Superconducting Super Collider Lab., Dallas, TX (United States); Lopez, M.L. [La Plata Univ. Nacional (Argentina); Wimpenny, S.J.; Yang, M.J. [California Univ., Riverside, CA (United States)

1991-11-01T23:59:59.000Z

256

A new VME based high voltage power supply for large experiments  

Science Conference Proceedings (OSTI)

A new VME based high voltage power supply has been developed for the D{O} experiment at Fermilab. There are three types of supplies delivering up to {plus minus}5.6 kV at 1.0 mA or +2.0 kV at 3.0 mA with a set accuracy of 1.5 V and extremely low voltage ripples. Complete computer control has allowed many special features to be developed for the supply, including user-defined control land monitor groups, variable ramp rates, and advanced histogram and graphic functions. 3 refs.

Ahn, S.C.; Angstadt, R.D.; Droege, T.F.; Johnson, M.E.; MacKinnon, B.A.; McNulty, S.E.; Shea, M.F.; Thompson, R.N.; Watson, M.M. (Fermi National Accelerator Lab., Batavia, IL (United States)); Franzini, P. (Columbia Univ., New York, NY (United States)); Jones, A.A. (Superconducting Super Collider Lab., Dallas, TX (United States)); Lopez, M.L. (La Plata Univ. Nacional (Argentina)); Wimpenny, S.J.; Yang, M.J

1991-11-01T23:59:59.000Z

257

Magnetic lens apparatus for a low-voltage high-resolution electron microscope  

DOE Patents (OSTI)

A lens apparatus in which a beam of charged particles of low accelerating voltage is brought to a focus by a magnetic field, the lens being situated behind the target position. The lens comprises an electrically-conducting coil arranged around the axis of the beam and a magnetic pole piece extending along the axis of the beam at least within the space surrounded by the coil. The lens apparatus comprises the sole focusing lens for high-resolution imaging in a low-voltage scanning electron microscope.

Crewe, Albert V. (Palos Park, IL)

1996-01-01T23:59:59.000Z

258

Power frequency communication on long feeders and high levels of harmonic distortion  

SciTech Connect

TWACS is a unique Power Frequency Communication (PFC) technology. The power voltage is modulated at the substation bus for outbound communication and inbound communication from a remote transponder is accomplished by drawing precisely controlled current pulses which are detectable at the distribution substation. The propagation characteristics of the TWACS signal and the frequency characteristics of the signal detector make it possible to communicate over very long distribution feeders and provide a high degree of immunity against harmonic distortions of the power system voltage and current.

Mak, S.T.; Maginnis, R.L. [Distribution Control Systems, Inc., Hazelwood, MO (United States)

1995-10-01T23:59:59.000Z

259

A Study On High Voltage AC Power Transmission Line Electric And Magnetic Field Coupling With Nearby Metallic Pipelines.  

E-Print Network (OSTI)

??In the recent years, there has been a trend to run metallic pipelines carrying petroleum products and high voltage AC power lines parallel to each… (more)

Gupta, Abhishek

2006-01-01T23:59:59.000Z

260

THE COST OF MAINTENANCE TRANSFER UNDER LOAD TAP OF THE TRANSFORMERS POWER OF EXTRA HIGH VOLTAGE THE ELETRONORTE.  

E-Print Network (OSTI)

??In this work a methodology for reduction of maintenance cost in the on-load tap changers (OLTC) of extra high voltage is proposed. The methodology is… (more)

RAIMUNDO NONATO ROSA FILHO

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Guidelines for Implementing Substation Automation Using IEC61850, the International Power System Information Modeling Standard  

Science Conference Proceedings (OSTI)

This report provides guidelines for substation planners, project managers, substation engineers, information technologists, and substation integrators on informational issues related to substation automation (SA) when IEC61850 standards are used.

2004-12-22T23:59:59.000Z

262

Ashland Area Support Substation Project : Environmental Assessment.  

SciTech Connect

The Bonneville Power Administration (BPA) provides wholesale electric service to the City of Ashland (the City) by transferring power over Pacific Power & Light Company`s (PP&L) 115-kilovolt (kV) transmission lines and through PP&L`s Ashland and Oak Knoll Substations. The City distributes power over a 12.5-kV system which is heavily loaded during winter peak periods and which has reached the limit of its ability to serve peak loads in a reliable manner. Peak loads under normal winter conditions have exceeded the ratings of the transformers at both the Ashland and Oak Knoll Substations. In 1989, the City modified its distribution system at the request of PP&L to allow transfer of three megawatts (MW`s) of electric power from the overloaded Ashland Substation to the Oak Knoll Substation. In cooperation with PP&L, BPA installed a temporary 6-8 megavolt-amp (MVA) 115-12.5-kV transformer for this purpose. This additional transformer, however, is only a temporary remedy. BPA needs to provide additional, reliable long-term service to the Ashland area through additional transformation in order to keep similar power failures from occurring during upcoming winters in the Ashland area. The temporary installation of another 20-MVA mobile transformer at the Ashland Substation and additional load curtailment are currently being studied to provide for sustained electrical service by the peak winter period 1992. Two overall electrical plans-of-service are described and evaluated in this report. One of them is proposed for action. Within that proposed plan-of-service are location options for the substation. Note that descriptions of actions that may be taken by the City of Ashland are based on information provided by them.

United States. Bonneville Power Administration.

1992-06-01T23:59:59.000Z

263

UPS-Substation (TM): Evaluation, Conceptual Design and Generic Specification  

Science Conference Proceedings (OSTI)

In general terms, the UPS-Substation(TM) is an uninterruptible power supply (UPS) at the substation level. This report summarizes determining application requirements, developing conceptual designs and cost estimates, and assessing potential market size based on application.

1999-09-21T23:59:59.000Z

264

Planning substation capacity under the single-contingency scenario  

Science Conference Proceedings (OSTI)

Florida Power and Light (FPL) adopts the single contingency emergency policy for its planning of substation capacity. This paper provides an approach to determine the maximum load which a substation can take on under such a policy. The approach consists of two LP models which determine: (1) the maximum substation load capacity, and (2) the reallocation of load when a substation`s demand cannot be met. Both models are formulated under the single-contingency scenario, an issue which had received little attention in the literature. Not only does the explicit treatment of the scenario provide an exact measure of a substation`s load limit, it also raises several important issues which previous works omit. These two models have been applied to the substation network of the Fort Myers District of the State of Florida.

Leung, L.C. [Chinese Univ. of Hong Kong, Shatin (Hong Kong). Decision Sciences and Managerial Economics; Khator, S.K. [Univ. of South Florida, Tampa, FL (United States). Industrial and Management Systems Engineering; Schnepp, J.C. [Crest Ultrasonics, Trenton, NJ (United States)

1995-08-01T23:59:59.000Z

265

Life Extension Guidelines for Substation Equipment  

Science Conference Proceedings (OSTI)

This technical update is part of an ongoing effort of the Electric Research Power Institute (EPRI) to improve high-voltage circuit breaker life management and provides maintenance and asset managers with a resource for the decisions faced when dealing with aging breaker systems, subsystems, assemblies, and components. It also is a source of information on circuit breaker inspection, assessment, maintenance, and ...

2012-12-12T23:59:59.000Z

266

STLOAD 1.1 (Substation Terminal Equipment Loading Software)  

Science Conference Proceedings (OSTI)

EPRI’s Substation Terminal Equipment Loading software (STLOAD 1.1) calculates temperatures and thermal ratings for substation equipment based on physical parameters of the equipment, electrical load, air temperature, and, where appropriate, solar heating and wind. This provides a convenient way for substation engineers to maximize the usage of existing substation terminal equipment under a wide variety of operating conditions. STLOAD can perform temperature and rating calculations for a daily load and am...

2009-04-06T23:59:59.000Z

267

Reducing Substation Auxiliary Power in the Consolidated Edison System  

Science Conference Proceedings (OSTI)

This demonstration/study project carried out by the Electric Power Research Institute (EPRI), who partnered with Consolidated Edison (Con Edison), has identified and documented energy-efficiency measures applicable within a substation. The study was conducted on four substations identified by Con Edison as candidates for potential energy-efficiency improvementW 49th St, W 50th St, Millwood, and E 179th St. The substation locations selected are representative of the many substations that are in Con Edison...

2012-05-31T23:59:59.000Z

268

Application Filling Requirements for Transmission Line and Substation...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

here Home Savings Application Filling Requirements for Transmission Line and Substation Construction Projects (Wisconsin) Application Filling Requirements for Transmission...

269

Environmental and Potential Health Effects of High Voltage Direct Current Transmission Lines  

Science Conference Proceedings (OSTI)

High-voltage direct current (HVDC) technology plays an important but highly selective role in the U.S. power delivery system. It is a cost-effective technology for transferring bulk power over long distances, a critical technology for asynchronous grid interconnection, and the preferred technology for long-distance underwater cable transmission. Current interest in renovating the national grid for greater loads and higher reliability as well as unique applications for renewable energy projects, including...

2012-07-31T23:59:59.000Z

270

Table 1. Design specifications of ultra-high speed PM motor. Supply voltage (V) 12  

E-Print Network (OSTI)

Analysis of Ultra-High Speed Permanent-Magnet Motor Masaru Kano, and Toshihiko Noguchi Department@vos.nagaokaut.ac.jp Abstract This paper describes a design of an ultra-high speed (UHS) permanent-magnet (PM) synchronous motor, a surface permanent-magnet (SPM) motor (150,000 r/min, 1.5 kW) fed by a low voltage battery (12 V

Fujimoto, Hiroshi

271

VULNERABILITY OF BLUETOOTH TO IMPULSIVE NOISE IN ELECTRICITY TRANSMISSION SUBSTATIONS  

E-Print Network (OSTI)

VULNERABILITY OF BLUETOOTH TO IMPULSIVE NOISE IN ELECTRICITY TRANSMISSION SUBSTATIONS S A Bhattil environment of an Electricity transmission substation environment is modelled as a Symmetric Alpha Stable of an electricity transmission substation. I. INTRODUCTION In industrial environments, Supervisor Control and Data

Atkinson, Robert C

272

The Dynamic Utilization of Substation Measurements to Maintain Power System  

E-Print Network (OSTI)

engineering), except for the mineral extraction criteria, they contribute to more than 50% to the substation to Aluminium Electrolysis Conversion Substations François Cluzel1* , Dominique Millet2 , Yann Leroy1 or energy mix). Two cases studies concerning AREVA T&D's aluminium electrolysis conversion substations

Kezunovic, Mladen

273

The Substation of the Future: A Feasibility Study  

E-Print Network (OSTI)

The Substation of the Future: A Feasibility Study Final Project Report Power Systems Engineering Research Center Empowering Minds to Engineer the Future Electric Energy System #12;Substation of the Future Engineering Research Center (PSERC) research project T-38 titled "Substation of the Future: A Feasibility

274

Environment and protection of a gas-insulated substation  

SciTech Connect

Unlike a conventional open-air designed substation, the environment of a gas-insulated substation (GIS) is under the control of the designer and operator. This is a feature that can be utilized by the protection engineer to develop a protective scheme for the substation. A discussion is provided to develop a fault anticipation protection scheme.

Koepfinger, J.L.; Lauth, W.C.

1980-01-01T23:59:59.000Z

275

Design and Optimization of Low Voltage High Performance Dual Threshold CMOS Circuits  

E-Print Network (OSTI)

Reduction in leakage power has become an important concern in lowvoltage, lowpower and high performance applications. In this paper, we use dual threshold technique to reduce leakage power by assigning high threshold voltage to some transistors in non-critical paths, and using lowthreshold transistors in critical paths. In order to achieve the best leakage power saving under target performance constraints, an algorithm is presented for selecting and assigning an optimal high threshold voltage. A general standby leakage current model which has been veri#ed by HSPICE is used to estimate standby leakage power. Results show that dual threshold technique is good for power reduction during both standby and active modes. The standby leakage power savings for some ISCAS benchmarks can be more than 50#. 1 Introduction With the growing use of portable and wireless electronic systems, reduction in power consumption has become more and more importantintoday's VLSI circuit and system designs #1#, ...

Liqiong Wei; Zhanping Chen; Mark Johnson; Kaushik Roy; Vivek De

1998-01-01T23:59:59.000Z

276

Assessing Power Substation Network Security and Survivability  

E-Print Network (OSTI)

This paper reports our experiences with identifying cyber-based threats to the survivability of power substation control networks. Observations from the initial application of vulnerability and hardening assessment techniques have been presented. The paper also discusses the state of the power industry cyber security, which appears to lag behind the state-ofthe-practice in both network security and ultrareliable systems design.

Carol Taylor; Paul Oman; Axel Krings

2003-01-01T23:59:59.000Z

277

Reliability mathematics analysis on traction substation operation  

Science Conference Proceedings (OSTI)

In electrified railway traction power supply systems, the operational qualities and reliabilities of the main traction transformer loop is higher, but ones of bus output units is comparatively low. The traction transformer loop still works when output ... Keywords: Erlang distribution, Markov theory, life, reliability, traction substation, transformer

Hongsheng Su

2008-11-01T23:59:59.000Z

278

Optical fiber imaging for high speed plasma motion diagnostics: Applied to low voltage circuit breakers  

Science Conference Proceedings (OSTI)

An integrated portable measurement system is described for the study of high speed and high temperature unsteady plasma flows such as those found in the vicinity of high current switching arcs. An array of optical fibers allows the formation of low spatial resolution images, with a maximum capture rate of 1x10{sup 6} images per second (1 MHz), with 8 bit intensity resolution. Novel software techniques are reported to allow imaging of the arc; and to measure arc trajectories. Results are presented on high current (2 kA) discharge events in a model test fixture and on the application to a commercial low voltage circuit breaker.

McBride, J. W. [School of Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ (United Kingdom); Balestrero, A.; Tribulato, G. [ABB SACE DIVISION, ABB S.p.A., Via Baioni, Bergamo 35 IT-24123 (Italy); Ghezzi, L. [ABB SACE DIVISION, ABB S.p.A., Viale dell'Industria, Vittuone (MI)18 IT-20010 (Italy); Cross, K. J. [Taicaan Ltd., 2 Venture Road, Southampton Science Park, Southampton, Hampshire SO16 7NP (United Kingdom)

2010-05-15T23:59:59.000Z

279

CRYOGENIC LIFETIME TESTS ON A COMMERCIAL EPOXY RESIN HIGH VOLTAGE BUSHING  

SciTech Connect

High-temperature superconducting (HTS) power devices operating in liquid nitrogen frequently require high-voltage bushings to carry the current leads from the superconducting windings to the room temperature grid connections. Oak Ridge National Laboratory is collaborating with Waukesha Electric Systems, SuperPower, and Southern California Edison to develop and demonstrate an HTS utility power transformer. Previous dielectric high voltage tests in support of this program have been carried out in test cryostats with commercial epoxy resin bushings from Electro Composites Inc. (ECI). Though the bushings performed well in these short-term tests, their long-term operation at high voltage in liquid nitrogen needs to be verified for use on the utility grid. Long-term tests are being carried out on a sample 28-kV-class ECI bushing. The bushing has a monolithic cast, cycloaliphatic resin body and is fire- and shatter-resistant. The test cryostat is located in an interlocked cage and is energized at 25 kVac around the clock. Liquid nitrogen (LN) is automatically refilled every 9.5 hours. Partial discharge, capacitance, and leakage resistance tests are periodically performed to check for deviations from factory values. At present, over 2400 hours have been accumulated with no changes in these parameters. The tests are scheduled to run for four to six months.

Schwenterly, S W [ORNL; Pleva, Ed [Waukesha Electric Systems, Waukesha, WI; Ha, Tam T [ORNL

2012-01-01T23:59:59.000Z

280

A knowledge-based approach to optimize switching in substations  

Science Conference Proceedings (OSTI)

Automatic sequence switching has been an important pursuit in the field of substation automation. This paper presents an intelligent approach to optimize switching sequences in electric substations. This paper starts with a presentation of the optimal sequence switching problem. It then suggests a knowledge-based model of a substation switch network organized in a tri-level hierarchical structure, and a set of basic techniques suitable for the general task of network re-organization. An intelligent optimal sequence switching strategy for substations based on modelling techniques is presented. An expert system in PROLOG used to formalize the sequence of switching operations and an application in substations is described.

Zhang, Z.Z.; Hope, G.S.; Malik, O.P. (Dept. of Electrical Engineering, Univ. of Calgary (CA))

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

EPRI High-Voltage Direct Current (HVDC) Transmission Reference Book: Interim Report  

Science Conference Proceedings (OSTI)

The EPRI High-Voltage Direct Current (HVDC) Transmission Reference Book is a state-of-the-art guidebook that provides transmission companies with a comprehensive, single source of technical information and guidance for designing, building, operating, and extending the life of HVDC transmission systems. The book joins the landmark series of EPRI power delivery reference books. These comprehensive guidebookseach printed with a distinctive colored coverdocument and distill the knowledge and experience of th...

2011-12-30T23:59:59.000Z

282

Field Guide: Compressors for High-Voltage Circuit Breakers, Optimized for Electronic Viewing  

Science Conference Proceedings (OSTI)

High-voltage circuit breakers perform essential protection and control functions on power transmission networks. A circuit breaker that fails to operate within its design time period may cause serious damage and extended outages. Proper maintenance of compressors can help to ensure that breakers operate reliably and can prevent premature failures. This field guide, which has been optimized for use on electronic devices such as smart phones and tablets, is intended to help utility field personnel properly...

2011-11-09T23:59:59.000Z

283

Round-robin artificial contamination test on high voltage dc insulators  

Science Conference Proceedings (OSTI)

This paper summarizes the results of a worldwide round-robin test of high voltage dc (HVDC) insulators, which was carried out in six laboratories aiming at standardization of the method for artificial contamination tests on HVDC insulators. Flashover characteristics of three kinds of specimens were evaluated by the clean fog and the salt fog procedures. Sufficient information is now available to allow the preparation of provisional international specifications for artificial contamination testing of HVDC insulators.

Naito, K.; Schneider, H.M.

1995-07-01T23:59:59.000Z

284

Field Guide: Lubrication of High-Voltage Circuit Breakers - 2013 Update  

Science Conference Proceedings (OSTI)

High-voltage circuit breakers (HVCBs) perform essential protection and control functions on power transmission networks. Circuit breaker mechanisms have multiple components that must operate in concert in order for the breaker to perform properly. If one component does not operate correctly, the circuit breaker may mis-operate or fail. A circuit breaker mis-operation may cause equipment damage and outages—both expensive consequences. Proper lubrication ...

2013-12-19T23:59:59.000Z

285

Proceedings: High Voltage Current Transformers and Bushings: Failure Prediction and Prevention Symposium  

Science Conference Proceedings (OSTI)

EPRI-sponsored research has identified key parameters indicative of condition and impending failure of oil-filled, high-voltage current transformers (HVCTs) and bushings. These findings will assist utilities to improve the monitoring of HVCTs and bushings, and to develop mitigation techniques to reduce the risk of catastrophic transformer failure. These proceedings present the results of this research and the experiences of other researchers worldwide.

1999-12-01T23:59:59.000Z

286

Effect of Space Charge on Surface Insulation of High-Voltage Direct-Current Bushings  

Science Conference Proceedings (OSTI)

Operating data on bushings and post insulators for HVDC converter stations demonstrate that large-diameter insulators perform poorly when exposed to a combination of rain or fog and airborne contaminants. A technique that produces an intense space charge, resulting in corona at the high-voltage electrode of HVDC bushings, shows promise of improving flashover performance in some laboratory applications, but apparently has little effect under simulated service conditions.

1987-11-03T23:59:59.000Z

287

Voltage stability limits for weak power systems with high wind penetration.  

E-Print Network (OSTI)

??Analysis of power system voltage stability has practical value in increasing wind penetration levels. As wind penetration levels increase in power systems, voltage stability challenges… (more)

Tamimi, Ala

2011-01-01T23:59:59.000Z

288

Design, Simulation, and Analysis of Substation Automation Networks  

E-Print Network (OSTI)

Society depends on computer networks for communication. The networks were built to support and facilitate several important applications such as email, web browsing and instant messaging. Recently, there is a significant interest in leveraging modern local and wide area communication networks for improving reliability and performance in critical infrastructures. Emerging critical infrastructure applications, such as smart grid, require a certain degree of reliability and Quality of Service (QoS). Supporting these applications requires network protocols that enable delay sensitive packet delivery and packet prioritization. However, most of the traditional networks are designed to provide best effort service without any support for QoS. The protocols used in these networks do not support packet prioritization, delay requirements and reliability. In this thesis, we focus on the design and analysis of communication protocols for supporting smart grid applications. In particular, we focus on the Substation Automation Systems (SAS). Substations are nodes in the smart grid infrastructure that help the in transportation of power by connecting the transmission and distribution lines. The SAS applications are con figured to operate with minimal human intervention. The SAS monitors the line loads continuously. If the load values are too high and can lead to damage, the SAS declares those conditions as faults. On fault detection, the SAS must take care of the communication with the relay to open the circuit to prevent any damage. These messages are of high priority and require reliable, delay sensitive delivery. There is a threshold for the delay of these messages, and a slight increase in the delay above the threshold might cause severe damages. Along with such high priority messages, the SAS has a lot of background traffic as well. In spite of the background traffic, the substation network must take care of delivering the priority messages on time. Hence, the network plays a vital role in the operation of the substation. Networks designed for such applications should be analyzed carefully to make sure that the requirements are met properly. We analyzed and compared the performance of the SAS under di erent network topologies. By observing the characteristics of the existing architectures, we came up with new architectures that perform better. We have suggested several modi cations to existing solutions that allow significant improvement in the performance of the existing solutions.

Kembanur Natarajan, Elangovan

2011-05-01T23:59:59.000Z

289

Experimental Estimate of Beam Loading and Minimum rf Voltage for Acceleration of High Intensity Beam in the Fermilab Booster  

E-Print Network (OSTI)

The difference between the rf voltage seen by the beam and the accelerating voltage required to match the rate of change of the Booster magnetic field is used to estimate the energy loss per beam turn. Because the rf voltage (RFSUM) and the synchronous phase can be experimentally measured, they can be used to calculate the effective accelerating voltage. Also an RFSUM reduction technique has been applied to measure experimentally the RFSUM limit at which the beam loss starts. With information on beam energy loss, the running conditions, especially for the high intensity beam, can be optimized in order to achieve a higher intensity beam from the Fermilab Booster.

Yang, X; Norem, J; Yang, Xi

2004-01-01T23:59:59.000Z

290

Experimental estimate of beam loading and minimum rf voltage for acceleration of high intensity beam in the Fermilab Booster  

SciTech Connect

The difference between the rf voltage seen by the beam and the accelerating voltage required to match the rate of change of the Booster magnetic field is used to estimate the energy loss per beam turn. Because the rf voltage (RFSUM) and the synchronous phase can be experimentally measured, they can be used to calculate the effective accelerating voltage. Also an RFSUM reduction technique has been applied to measure experimentally the RFSUM limit at which the beam loss starts. With information on beam energy loss, the running conditions, especially for the high intensity beam, can be optimized in order to achieve a higher intensity beam from the Fermilab Booster.

Xi Yang; Charles M Ankenbrandt and Jim Norem

2004-04-01T23:59:59.000Z

291

A high voltage pulsed power supply for capillary discharge waveguide applications  

Science Conference Proceedings (OSTI)

We present an all solid-state, high voltage pulsed power supply for inducing stable plasma formation (density {approx}10{sup 18} cm{sup -3}) in gas-filled capillary discharge waveguides. The pulser (pulse duration of 1 {mu}s) is based on transistor switching and wound transmission line transformer technology. For a capillary of length 40 mm and diameter 265 {mu}m and gas backing pressure of 100 mbar, a fast voltage pulse risetime of 95 ns initiates breakdown at 13 kV along the capillary. A peak current of {approx}280 A indicates near complete ionization, and the r.m.s. temporal jitter in the current pulse is only 4 ns. Temporally stable plasma formation is crucial for deploying capillary waveguides as plasma channels in laser-plasma interaction experiments, such as the laser wakefield accelerator.

Abuazoum, S.; Wiggins, S. M.; Issac, R. C.; Welsh, G. H.; Vieux, G.; Jaroszynski, D. A. [Department of Physics, Scottish Universities Physics Alliance, University of Strathclyde, Glasgow G4 0NG (United Kingdom); Ganciu, M. [Low Temperature Plasma Department, National Institute of Lasers, Plasma and Radiation Physics, 077125, Magurele, Bucharest (Romania)

2011-06-15T23:59:59.000Z

292

High Voltage CMOS Control Interface for Astronomy - Grade Charged Coupled Devices  

E-Print Network (OSTI)

The Pan-STARRS telescope consists of an array of smaller mirrors viewed by a Gigapixel arrays of CCDs. These focal planes employ Orthogonal Transfer CCDs (OTCCDs) to allow on-chip image stabilization. Each OTCCD has advanced logic features that are controlled externally. A CMOS Interface Device for High Voltage has been developed to provide the appropiate voltage signal levels from a readout and control system designated STARGRASP. OTCCD chip output levels range from -3.3V to 16.7V, with two different output drive strenghts required depending on load capacitance (50pF and 1000pF), with 24mA of drive and a rise time on the order of 100ns. Additional testing ADC structures have been included in this chip to evaluate future functional additions for a next version of the chip.

Martin, Elena; Koga, Aaron; Ruckman, Larry; Onaka, Peter; Tonry, John; Lee, Aaron

2008-01-01T23:59:59.000Z

293

Feasibility of high-voltage systems for a very long drift in liquid argon TPCs  

E-Print Network (OSTI)

Designs of high-voltage (HV) systems for creating a drift electric field in liquid argon TPCs are reviewed. In ongoing experiments systems capable of approx. 100 kV are realised for a drift field of 0.5-1 kV/cm over a length of up to 1.5 m. Two of them having different approaches are presented: (1) the ICARUS-T600 detector having a system consisting of an external power supply, HV feedthroughs and resistive voltage degraders and (2) the ArDM-1t detector having a cryogenic Greinacher HV multiplier inside the liquid argon volume. For a giant scale liquid argon TPC, a system providing 2 MV may be required to attain a drift length of approx. 20 m. Feasibility of such a system is evaluated by extrapolating the existing designs.

Horikawa, S; Kaufmann, L; Laffranchi, M; Marchionni, A; Messina, M; Natterer, G; Rubbia, A

2010-01-01T23:59:59.000Z

294

Electrochemical Windows of Sulfone-Based Electrolytes for High-Voltage Li-Ion Batteries  

Science Conference Proceedings (OSTI)

Further development of high-voltage lithium-ion batteries requires electrolytes with electrochemical windows greater than 5 V. Sulfone-based electrolytes are promising for such a purpose. Here we compute the electrochemical windows for experimentally tested sulfone electrolytes by different levels of theory in combination with various solvation models. The MP2 method combined with the polarizable continuum model is shown to be the most accurate method to predict oxidation potentials of sulfone-based electrolytes with mean deviation less than 0.29 V. Mulliken charge analysis shows that the oxidation happens on the sulfone group for ethylmethyl sulfone and tetramethylene sulfone, and on the ether group for ether functionalized sulfones. Large electrochemical windows of sulfone-based electrolytes are mainly contributed by the sulfone group in the molecules which helps lower the HOMO level. This study can help understand the voltage limits imposed by the sulfone-based electrolytes and aid in designing new electrolytes with greater electrochemical windows.

Shao, Nan [ORNL; Sun, Xiao-Guang [ORNL; Dai, Sheng [ORNL; Jiang, Deen [ORNL

2011-01-01T23:59:59.000Z

295

Electric power high-voltage transmission lines: Design options, cost, and electric and magnetic field levels  

SciTech Connect

This report provides background information about (1) the electric and magnetic fields (EMFs) of high-voltage transmission lines at typical voltages and line configurations and (2) typical transmission line costs to assist on alternatives in environmental documents. EMF strengths at 0 {+-} 200 ft from centerline were calculated for ac overhead lines, and for 345 and 230-kV ac underground line and for a {+-}450-kV dc overhead line. Compacting and height sensitivity factors were computed for the variation in EMFs when line conductors are moved closer or raised. Estimated costs for the lines are presented and discussed so that the impact of using alternative strategies for reducing EMF strengths and the implications of implementing the strategies can be better appreciated.

Stoffel, J.B.; Pentecost, E.D.; Roman, R.D.; Traczyk, P.A.

1994-11-01T23:59:59.000Z

296

Novel Nonflammable Electrolytes for Secondary Magnesium Batteries and High Voltage Electrolytes for Electrochemcial Supercapacitors  

Science Conference Proceedings (OSTI)

Magnesium has been used successfully in primary batteries, but its use in rechargeable cells has been stymied by the lack of suitable non-aqueous electrolyte that can conduct Mg+2 species, combined with poor stripping and plating properties. The development of a suitable cathode material for rechargeable magnesium batteries has also been a roadblock, but a nonflammable electrolyte is key. Likewise, the development of safe high voltage electrochemical supercapaitors has been stymied by the use of flammable solvents in the liquid electrolyte; to wit, acetonitrile. The purpose of the research conducted in this effort was to identify useful compositions of magnesium salts and polyphosphate solvents that would enable magnesium ions to be cycled within a secondary battery design. The polyphosphate solvents would provide the solvent for the magnesium salts while preventing the electrolyte from being flammable. This would enable these novel electrolytes to be considered as an alternative to THF-based electrolytes. In addition, we explored several of these solvents together with lithium slats for use as high voltage electrolytes for carbon-based electrochemical supercapacitors. The research was successful in that: 1) Magnesium imide dissolved in a phosphate ester solvent that contains a halogented phosphate ester appears to be the preferred electrolyte for a rechargeable Mg cell. 2) A combination of B-doped CNTs and vanadium phosphate appear to be the cathode of choice for a rechargeable Mg cell by virtue of higher voltage and better reversibility. 3) Magnesium alloys appear to perform better than pure magnesium when used in combination with the novel polyphosphate electrolytes. Also, this effort has established that Phoenix Innovationâ??s family of phosphonate/phosphate electrolytes together with specific lithium slats can be used in supercapacitor systems at voltages of greater than 10V.

Dr. Brian Dixon

2008-12-30T23:59:59.000Z

297

Assessment of Alternatives to Substation Batteries: Current Utility Practices, Interim Report: Tasks 1 and 2: Interim Report: Tasks 1 and 2  

Science Conference Proceedings (OSTI)

Back-up power systems in electric company substations, primarily stationary lead-acid and nickel cadmium battery systems serving dc loads, play a critical role in substation reliability. This product is intended to help mitigate system reliability concerns and operating and maintenance budget constraints associated with uncertain performance and high maintenance of emergency power systems using traditional lead-acid battery technology.

2003-12-31T23:59:59.000Z

298

Marion Industrial Substation Project : Environmental Assessment.  

SciTech Connect

Consumers Power, Inc. (CPI), proposes to construct a new distribution substation under the existing Bonneville Power Administration (BPA) Albay-Lebanon transmission line near the city of Albany in Linn County, Oregon. BPA is proposing to grant a new Point of Delivery to CPI at this substation. The purpose of the project is to serve the developing industrial needs in the Marion Industrial Park and on the 550 acres of nearby land within CPI`s service area that are zoned for residential use. CPI prepared, and the Rural Electrification Administration (REA) has approved a Borrower`s Environmental Report (BER) which addresses this action along with several other proposed projects in the CPI service area. Portions of this BER are summarized in this brief EA. BPA is preparing its own EA since Department of Energy National Environmental Policy Act (NEPA) guidelines require additional environmental concerns to be addressed than are required by REA`s NEPA guidelines.

United States. Bonneville Power Administration.

1992-04-01T23:59:59.000Z

299

Marion Industrial Substation Project : Environmental Assessment.  

SciTech Connect

Consumers Power, Inc. (CPI), proposes to construct a new distribution substation under the existing Bonneville Power Administration (BPA) Albay-Lebanon transmission line near the city of Albany in Linn County, Oregon. BPA is proposing to grant a new Point of Delivery to CPI at this substation. The purpose of the project is to serve the developing industrial needs in the Marion Industrial Park and on the 550 acres of nearby land within CPI's service area that are zoned for residential use. CPI prepared, and the Rural Electrification Administration (REA) has approved a Borrower's Environmental Report (BER) which addresses this action along with several other proposed projects in the CPI service area. Portions of this BER are summarized in this brief EA. BPA is preparing its own EA since Department of Energy National Environmental Policy Act (NEPA) guidelines require additional environmental concerns to be addressed than are required by REA's NEPA guidelines.

United States. Bonneville Power Administration.

1992-04-01T23:59:59.000Z

300

Briefings on Physical Security of Electricity Substations  

Energy.gov (U.S. Department of Energy (DOE))

The Department of Energy (DOE) and Department of Homeland Security (DHS), in coordination with the Federal Bureau of Investigation, the Federal Energy Regulatory Commission's Office of Energy Infrastructure Security, the Electricity Sector Information Sharing and Analysis Center (ES-ISAC), North American Electricity Reliability Corporation (NERC), and industry experts, will conduct a series of briefings across the country with electricity sector owners and operators, and local law enforcement on the physical security of electricity substations.

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Novel Sensor Technologies for Substation Applications  

Science Conference Proceedings (OSTI)

Increasingly, todays electricity companies need to employ their assets to the fullest while continuing to maintain system reliability. In this environment, management of aging assets has become one of the most critical issues facing substation managers and engineers. Central to asset management are effective diagnostics and condition assessment. Reliable condition monitoring, proper diagnostics, and accurate interpretation could help reduce the rate of aging, enable an accurate assessment of the overall ...

2011-12-21T23:59:59.000Z

302

Improved Thermal Modeling Tools for Substation Equipment  

Science Conference Proceedings (OSTI)

The ratings of substation terminal equipment often limit power flow through transmission circuits. Capital investment in terminal equipment is generally modest in comparison to lines, transformers, and underground cables. Replacement difficulties are centered more on service availability than on cost. Detailed manufacturer test data is often unavailable for older equipment but ratings are simpler to calculate than for lines. Certain types of terminal equipment are tolerant of over-loading and problems in...

2007-03-08T23:59:59.000Z

303

Substation distribution transformers failures and spares  

Science Conference Proceedings (OSTI)

Electric utilities should have a sufficient number of spare transformers to backup substation distribution transformers to replace transformers that fail and require factory rebuild or replacement. To identify such a number, the statistical methodology was developed to analyze available failure data for different groups of transformer. That methodology enables the estimation of future numbers of failures with associated probabilities, recommends the proper number of spares, identifies the necessity and shows the means to shorten the transformer`s replacement time.

Kogan, V.I. Roeger, C.J.; Tipton, D.E. [American Electric Power Service Corp., Columbus, OH (United States)

1996-11-01T23:59:59.000Z

304

Condition Assessment of Substation Ground Grids  

Science Conference Proceedings (OSTI)

This report describes the first stage of research to develop a simple and inexpensive method and device to assess the integrity of substation grounding grids. The problem has been studied before but there is not, to our knowledge, a reliable and inexpensive method or device to make a reliable diagnosis. While the EPRI-developed Ground Grid Evaluator (commercially knows as the Smart Ground Multimeter or SGM) can be used to provide valuable information, the equipment is considered to be expensive and requi...

2008-03-26T23:59:59.000Z

305

Surge propagation in gas insulated substation  

SciTech Connect

Surge propagation performance in a 550 kV gas insulated substation is studied experimentally and by computer simulation using the Electro-Magnetic Transients Program. Extra capacitance added to the system by the components of GIS such as potential devices, branch buses, circuit breakers deform the wave shape of the travelling surges. A simple modeling technique to represent GIS in surge analysis is proposed and its applicability is proved. Paper No. 80 SM 658-5.

Matsumura, S.; Nitta, T.

1981-06-01T23:59:59.000Z

306

RI critical in surburban hvdc substation design  

SciTech Connect

Access to existing rights of way, site availability and ample short circuit capabilities led to the location of Sylmar hvdc substation within the city limits of Los Angeles. The Department of Water and Power, in choosing this site as the southern terminus of the 851 mile, 400 kV, hvdc transmission line from The Dalles, Oregon, was faced with unusual problems in the suppression of radio and telephone interference.

York, E.

1968-07-01T23:59:59.000Z

307

Substation Bus Ampacity Uprating: Feasibility Study  

Science Conference Proceedings (OSTI)

The continuous increase in demand for electric power has pushed some of the components in the Con Edison system to their design limits. These limits, established in the past, were often selected with general and conservative assumptions. Consequently, Con Edison requested the Electric Power Research Institute (EPRI) to investigate the possibility of raising the rating of their 3,000A substation bus to a higher value.The first step in the investigation was to conduct a feasibility study ...

2013-04-24T23:59:59.000Z

308

Condition Assessment of Substation Ground Grids  

Science Conference Proceedings (OSTI)

This report describes the second stage of a research project to develop a simple and inexpensive method and device to assess the integrity of substation grounding grids. The problem has been studied before but a reliable and inexpensive method or device to make a reliable diagnosis of grid condition is still lacking. While the EPRI-developed Ground Grid Evaluator (commercially known as the Smart Ground Multimeter) can be used to provide valuable information, the equipment is expensive and requires extens...

2008-12-17T23:59:59.000Z

309

Quality Assurance Plan for site electrical replacements at substation line item subproject: 69 KV Substation  

Science Conference Proceedings (OSTI)

The 69 KV Substation Project is based on the recognized need to provide a continuous, reliable source of power and to improve the firm capacity of the electrical service to all production facilities at Mound. The project consists of the following major element: 69 KV Substation: (1) Install a 69 KV Substation and associated equipment with two parallel 18 MVA transformers. (2) Install duct bank as required and provide 15 KV feeder cable from new substation to existing Substation 95 for connection to Mound`s existing primary distribution system. (3) Install duct bank for underground routing of the 15 KV feeder cable from Manhole 5C to the existing power house cable pit. (4) Reconfigure existing Dayton Power and Light Co. 15 KV switchgear in P Building. The purpose of this Quality Assurance Plan (QA Plan) is to assure that the objectives of the United States Department of Energy (D.O.E.) and EG&G Mound Applied Technologies, Miamisburg, Ohio (Mound) are met for this non-weapons project relative to health and safety, protection of the environment, reliability and continuity of operations, and documentation of quality efforts. This QA Plan identifies the activities and responsibilities which are necessary in the design, procurement, fabrication, installation, and start up of this project in order to meet these objectives.

Ohler, C.K.

1991-05-21T23:59:59.000Z

310

Lightning overvoltage protection of the paddock 362-145 kV Gas-Insulated Substation  

SciTech Connect

Backflashovers close to the Paddiock 362-145 kV Gas-Insulated Substation (GIS) have been analyzed with the Electro-Magnetic Transient Program (EMTP) using a frequency dependent multi-conductor system. The severity of the lightning stroke currents were derived based on recent recordings in the eastern United States. Impacts of corona attenuation and distortion were accounted for using a shunt linear model approach. Turn-up effects of both line insulator flashover voltages and surge arrester protective characteristics were represented based on manufacturer's volt-time curves. Wave shaping effects of substation capacitances (ie., PT's transformers, CCPD's) were also modeled. Results show the importance of various modeling details in determining the overvoltages inside the GIS due to close backflashovers, which are caused by lightning strokes with varying intensity. These results are aimed at better evaluation of lightning protection requirements for GIS protected by metal-oxide surge arresters.

Elahi, H.; Sublich, M. (GE Industry and Utility Sales, Schenectady, NY (US)); Anderson, M.E.; Nelson, B.D. (Wisconsin Power and Light Co., Madison, WI (USA))

1990-01-01T23:59:59.000Z

311

High-voltage technology for the LASL implosion-heating experiment  

SciTech Connect

The implosion-heating power supply uses four 125-kV generators in series. Each generator consists of a fast 125-kV pulse-forming network made up of capacitors attached to a 1m-wide parallel-plate transmission line which is fed through multiple cables from a 2.5- mu F, 0.5- mu H Marx bank charged to 180 kV. To simplify construction it was decided to do without oil or water for high- voltage insulation and grading. The developments described here are: (1) a low- inductance connection between the 125-kV capacitors and the parallel-plate transmission line using an elastomer gasket capable of holding 200 kV; (2) edge flashover prevention by ballooning'' the sheet insulation, by which a 10-cm edge extension of insulation is capable of withstanding a 200-kV pulse for several microseconds; (3) using the edge flashover for over-voltage prevention; (4) grading of voltage along insulators with conducting plastic sheets to prevent flashover at the load switches and cable connections; and (51 capacitively graded insulating supports for the Marx banks. (auth)

Hammel, J.E.; Henins, I.; Marshall, J.; Sherwood, A.R.

1973-01-01T23:59:59.000Z

312

Degradation of Photovoltaic Modules Under High Voltage Stress in the Field: Preprint  

DOE Green Energy (OSTI)

The degradation in performance for eight photovoltaic (PV) modules stressed at high voltage (HV) is presented. Four types of modules--tandem-junction and triple-junction amorphous thin-film silicon, plus crystalline and polycrystalline silicon modules--were tested, with a pair of each biased at opposite polarities. They were deployed outdoors between 2001 and 2009 with their respective HV leakage currents through the module encapsulation continuously monitored with a data acquisition system, along with air temperature and relative humidity. For the first 5 years, all modules were biased continuously at fixed 600 VDC, day and night. In the last 2 years, the modules were step-bias stressed cyclically up and down in voltage between 10 and 600 VDC, in steps of tens to hundreds of volts. This allowed characterization of leakage current versus voltage under a large range of temperature and moisture conditions, facilitating determination of leakage paths. An analysis of the degradation is presented, along with integrated leakage charge. In HV operation: the bulk silicon modules degraded either insignificantly or at rates of 0.1%/yr higher than modules not biased at HV; for the thin-film silicon modules, the added loss rates are insignificant for one type, or 0.2%/yr-0.6%/yr larger for the other type.

del Cueto, J. A.; Rummel, S. R.

2010-08-01T23:59:59.000Z

313

Conformational Diversity and Sub-states in Enzyme Catalysis | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Conformational Diversity and Sub-states in Enzyme Catalysis Conformational Diversity and Sub-states in Enzyme Catalysis November 01, 2013 Enzymes are great biocatalysts, and have attracted significant interest for industrial applications (including cellulosic ethanol) due to their remarkable catalytic efficiencies. The understanding of factors that enable enzymes to achieve the high catalytic efficiency will have large impact through design of new and powerful biocatalysts. Unfortunately, the understanding of these factors have largely remain a mystery so far. Using joint computational-experimental methodology we have developed a unique technique named quasi-anharmonic analysis (QAA) for identification of conformational diversity and conformational sub-states associated with enzyme function. As a result of this approach we have been able to develop

314

Voltage Stability Analysis of a Distributed Network Incorporating Wind Power Resource  

Science Conference Proceedings (OSTI)

This paper investigates the impacts of a wind farm connected at Harterbeespoort substation in South Africa on voltage stability of the power network. The site wind speed was determined and analyzed for viability. A comparison is made between the use ...

Denis Juma; Bessie Monchusi; Josiah Munda; Adisa Jimoh

2011-01-01T23:59:59.000Z

315

A Fusing Switch for Fault Suppression in the SNS High Voltage Converter Modulators  

DOE Green Energy (OSTI)

The High Voltage Converter Modulators (HVCMs) at the Spallation Neutron Source (SNS) have operated in excess of a combined 250,000 hours. Performance and reliability improvements to the HVCM are ongoing to increase modulator availability as accelerator system demands increase. There is a relatively large amount of energy storage in the HVCMs, {approx}180 kJ. This energy has the potential to dump into unsuppressed faults, cause damage, and increase the time to repair. The 'fusing switch' concept involves isolation of this stored energy from the location of the most common faults. This paper introduces this concept and its application to the HVCMs.

Kemp, Mark A.; Burkhart, Craig; Nguyen, Minh N.; /SLAC; Anderson, David E.; /Oak Ridge

2009-08-03T23:59:59.000Z

316

Categorical Exclusion (CX) Determination Proposed Action: Havre Substation, Stage 03.  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Havre Substation, Stage 03. Havre Substation, Stage 03. Description of Proposed Action: The Western Area Power Administration (Western) is proposing to expand the Havre Substation approximately 150 ft to the north to accommodate a new delivery service from the newly built Herron Substation by Hill County. The expansion also converts the existing 115-kV single bus into a ring bus which will improve reliability. Western is also expanding the yard to the east to accommodate the replacement of the existing control building and control boards. Number and Title of Categorical Exclusions Being Applied: 10 CFR 1021.410 Subpart D, Appendix B, B4.11: Construction of electric power substations .. . or modification of existing substations and support facilities . Regulatory Requirements for CX Determination: The DOE Guidelines for Compliance with

317

Advanced Substation Data Collecting and Processing for State Estimation Enhancement  

E-Print Network (OSTI)

functions within a substation can be performed more efficiently if all the substation data is collected from and shared among Intelligent Electronic Devices (IEDs). Gathered measurements and apparatus statuses can be processed by (local) substation computer(s). Processing includes data consistency checking, switching sequence monitoring, predicting switching outcomes, etc. Processed data may be used locally and/or communicated to remote sites (neighboring substations and/or control centers). Substation data integration is facilitated by existence and appropriate connection of IEDs. The paper presents an approach to implementation of substation data integration and information exchange. The emphasis is on the utilization of local data redundancy to enhance power system state estimation, especially topology error detection.

Sasa Jakovljevic; Student Member; Mladen Kezunovic

2002-01-01T23:59:59.000Z

318

Touch and Step Voltage Measurements on Field Installed Ground Grid Overlaid with Gravel and Asphalt Beds  

Science Conference Proceedings (OSTI)

Gravel and asphalt are commonly used as surfacing materials in and around substations. Both the electrical characteristics of the surfacing material and its moisture condition substantially affect the exposure (step, touch) voltage and the resulting current. This project evaluates the effects of various types of surfacing materials (three gravel types and asphalt) and conditions (dry and wet) on step and touch voltages in and around substations.

2010-12-21T23:59:59.000Z

319

The commercial development of water repellent coatings for high voltage transmission lines  

SciTech Connect

The purpose of the Cooperative Research and Development Agreement (CRADA) between UT-Battelle, LLC and Southwire Company was to jointly develop a low cost, commercially viable, water-repellant anti-icing coating system for high voltage transmission lines. Icing of power lines and other structures caused by freezing rain events occurs annually in the United States, and leads to severe and prolonged power outages. These outages cause untold economic and personal distress for many American families and businesses. Researchers at the Department of Energy?s Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee have previously developed a set of superhydrophobic coatings with remarkable anti-icing properties that could potentially be sprayed or painted onto high-tension power lines and pylons. These coatings drastically reduce ice accumulation on these structures during freezing rain events. The project involved obtaining technical input, supplies and test high voltage cables from Southwire, along with the joint development of anti-icing coating techniques, which would result in a commercial license agreement between Southwire and ORNL, and potentially other companies requiring water repellent anti-icing coatings.

Hunter, S. R. [ORNL] [ORNL; Daniel, A. [Southwire Company] [Southwire Company

2013-10-31T23:59:59.000Z

320

The commercial development of water repellent coatings for high voltage transmission lines  

SciTech Connect

The purpose of the Cooperative Research and Development Agreement (CRADA) between UT-Battelle, LLC and Southwire Company was to jointly develop a low cost, commercially viable, water-repellant anti-icing coating system for high voltage transmission lines. Icing of power lines and other structures caused by freezing rain events occurs annually in the United States, and leads to severe and prolonged power outages. These outages cause untold economic and personal distress for many American families and businesses. Researchers at the Department of Energy s Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee have previously developed a set of superhydrophobic coatings with remarkable anti-icing properties that could potentially be sprayed or painted onto high-tension power lines and pylons. These coatings drastically reduce ice accumulation on these structures during freezing rain events. The project involved obtaining technical input, supplies and test high voltage cables from Southwire, along with the joint development of anti-icing coating techniques, which would result in a commercial license agreement between Southwire and ORNL, and potentially other companies requiring water repellent anti-icing coatings.

Hunter, Scott Robert [ORNL] [ORNL

2013-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Application of programmable logic controllers to substation control and protection  

Science Conference Proceedings (OSTI)

This paper describes the application of programmable logic controllers (PLCs) to control and protection of bulk power and regional supply substations. PLC requirements are discussed and the concept of zones of control is explained as applied to standard PP L substation arrangements. The use of a peer-to-peer communication network between logic controllers and other substation equipment is also discussed. Details of an installation completed in spring, 1992, are presented, including experience acquired from power system faults.

Gilbert, J.G.; Diehl, G.R. (Pennsylvania Power Light Co., Allentown, PA (United States))

1994-01-01T23:59:59.000Z

322

Knowledge engineering tool for training power-substation operators  

Science Conference Proceedings (OSTI)

Artificial intelligence techniques have been applied to create systems that can give answers for different situations and assistance during the substation switching operation. These techniques have also been used for training purposes. This paper presents a computational package for training power substation operators in the control and corrective actions using expert system techniques. Illustrative examples are presented using a 138-kV CEMIG substation.

Lambert-Torres, G. [Escola Federal de Engenharia de Itajuba (Brazil)]|[Univ. of Waterloo, Ontario (Canada); Costa, C.I.A.; Alves da Silva, A.P. [Escola Federal de Engeharia de Itajuba (Brazil); Ribeiro, G.M. [Companhia Energetica de Minas Gerais (Brazil); Quintana, V.H. [Univ. of Waterloo, Ontario (Canada)

1997-04-01T23:59:59.000Z

323

Substation Condition Monitoring and Implementation Database Version 1.0  

Science Conference Proceedings (OSTI)

The Substation Sensor Database provides a searchable database of sensors available to substation engineers, categorized by Area, Component, Sub-Component, Parameter, and Technology.  By specifying each category, the list can be filtered to a sub-set of sensors.  By clicking on a sensor’s name, details can be viewed including a description, sensor maturity, and a link to the manufacturer. Through data-mining of this database substation engineers could work on the development of ...

2012-11-26T23:59:59.000Z

324

Data collecting and processing for substation integration enhancement  

E-Print Network (OSTI)

The issue of substation integration is recognized as a very important one ever since the process of technological development brought a multitude of new computer-based devices and functions into substation operation. During the relatively short time period after the first microprocessors were invented, a myriad of computer-based devices found their application in power engineering. Those devices had a variety of input and output data formats, which hampered exchange of data among different devices. Recent initiatives for standardization of substation data formats and communication protocols have progressed to facilitate production of devices with standardized data formats and data exchange capabilities. Central substation computers now have an opportunity to collect and process data from such computer-based devices. An advanced data collecting and processing solution is developed and implemented as Integrated Substation Software in an effort to enhance substation integration. This report describes a solution that comprises data generation using a substation model, data collecting from modeled apparatus and instruments and finally application of data processing and consistency checking algorithms for creating outputs. The process of data collecting and processing is automated and repeated in equidistant time intervals. Results of processing and related reports are concisely displayed on the user interface screen and exported through data files. The Substation Integration Software was tested through the set of scenarios where each scenario is used to test one of the processing and consistency checking algorithms. The results show that measurements are improved and applicable for usage by other substation and system-wide applications.

Jakovljevic, Sasa

2003-05-01T23:59:59.000Z

325

Microsoft Word - CX-Coos-CurryNorwaySubstation_WEB.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Line and load interconnection of Coos-Curry Electric Cooperative's (Coos-Curry) new substation to Bonneville Power Administration's (BPA) Fairview-Bandon 115-kV transmission...

326

Environmental Assessment of Proposed Filbert Substation and Tap Project.  

SciTech Connect

The proposal is a cooperative (jointly funded and owned) action between Bonneville Power Administration (BPS) and FGLandP involving construction of the 115/12.5-kV Filbert Substation. BPA would also build a 0.8-mile overhead 115-kV tapline from BPA's Forest Grove-McMinnville 115-kV line to the proposed substation. The Forest Grove-McMinnville transmission line has available capacity to support the proposed substation. The FGLandP would build four underground distribution circuits to connect the substation to its existing distribution system. It is normally BPA's practice to consider several substation location alternatives as a part of its facility siting process. The proposed substation site was recommended after a preliminary field evaluation by BPA determined that building on the proposed site was preferable because available sites south of the Tualatin Valley Highway and Southern Pacific Railroad were either on presently cultivated farmland, were in a floodplain, or were inaccessible without extensive access road construction. The proposed substation site is owned by FGLandP, is designated for use as a utility substation in the Forest Grove Comprehensive Plan, and was purchased by FGLandP in anticipation of a need for its use as a substation site because of its central location in relation to existing and forecasted loads. The site is accessible from Filbert Street (city road), and is gently sloping. This report describes potential environmental impacts of the proposed actions.

United States. Bonneville Power Administration.

1984-03-01T23:59:59.000Z

327

Application Filling Requirements for Transmission Line and Substation...  

Open Energy Info (EERE)

icon Twitter icon Application Filling Requirements for Transmission Line and Substation Construction Projects (Wisconsin) This is the approved revision of this page, as...

328

Market Manual (Draft rev 5 – ‘Clean’) Transmission Grid- High Voltage Metering  

E-Print Network (OSTI)

1.1. The Market Rules allow metering installations to be placed on the high voltage (HV) grid on the supply side of the Defined Meter Point. 1.2. The Market Rules allow metering installations on the high voltage grid to be associated to more than one connection point or embedded connection point. 1.3. The Market Rules permit a metering installation to be registered in respect of more than one facility even though the meter point is not located at the defined meter points, provided that all transfers of energy at any points of supply or consumption for the facilities to which the metering installation relates are determined in a manner satisfactory to the IESO. 1.4. This arrangement permits a reduction in the number of metering installations by using a single HV metering installation to settle multiple connection points or embedded connection points to a single delivery point. This arrangement applies to both energy and transmission settlement. 1.5. Any adjustment between the metering installations and the normal location of the Delivery Point(s) may be by means of an adjustment formula, provided that all

unknown authors

2008-01-01T23:59:59.000Z

329

Holbrook Substation Superconductor Cable System, Long Island, New York Final Report  

SciTech Connect

The LIPA Superconductor project broke ground on July 4, 2006, was first energized on April 22, 2008 (Earth Day) and was commissioned on June 25, 2008. Since commissioning, up until early March, 2009, there were numerous refrigeration events that impacted steady state operations. This led to the review of the alarms that were being generated and a rewrite of the program logic in order to decrease the hypersensitivity surrounding these alarms. The high temperature superconductor (HTS) cable was energized on March 5, 2009 and ran uninterrupted until a human error during a refrigeration system switchover knocked the cable out of the grid in early February 2010. The HTS cable was in the grid uninterrupted from March 5, 2009 to February 4, 2010. Although there have been refrigeration events (propagated mainly by voltage sags/surges) during this period, the system was able to automatically switch over from the primary to the backup refrigeration system without issue as required during this period. On February 4, 2010, when switching from the backup over to the primary refrigeration system, two rather than one liquid nitrogen pumps were started inadvertently by a human error (communication) causing an overpressure in the cable cooling line. This in turn activated the pressure relief valve located in the grounding substation. The cable was automatically taken out of the grid without any damage to the components or system as a result of signals sent from the AMSC control cabinet to the LIPA substation. The cable was switched back into the grid again on March 16, 2010 without incident and has been operational since that time. Since switching from the backup to the primary is not an automatic process, a recent improvement was added to the refrigeration operating system to allow remote commands to return the system from backup to primary cooling. This improvement makes the switching procedure quicker since travel to the site to perform this operation is no longer necessary and safer since it is now a programmed procedure versus the former written procedure that was still subject to human variation in the process.

Maguire, James; McNamara, Joseph

2010-06-25T23:59:59.000Z

330

Screening level characterization of electrical Substation 411  

SciTech Connect

Substation 411 transformer dielectric fluids were sampled for uranium and PCBs. The exterior surfaces of the metal transformers were measured for radioactivity. Results of the sampling revealed that some transformer fluid contained PCBs, but no uranium in excess of naturally occurring amounts was detected. In addition, the exterior surface of the transformers were uncontaminated. Subject to measurement of the base of the transformers (which were inaccessible during the surface scans for radioactivity), the transformers and dielectric fluids may be removed from the site for disposal. Two appendices are included: (a) a sampling plan, and (b) soil lab reports.

1990-11-01T23:59:59.000Z

331

A cathodically protected electrical substation ground grid  

SciTech Connect

This paper presents a discussion on the design of a cathodically protected electrical substation grounding system in which a steel ground grid and steel ground rods were used in place of the commonly used copper ground grid and copperweld ground rods. Several electrical constraints are presented which discuss common electrical utility requirements, safety considerations and economic factors. The grounding system materials which were chosen are discussed along with the means of cathodic protection. Finally, the design, construction and testing considerations are presented as an aid to others who wish to design a similar system.

Nelson, J.P.; Holm, W.K.

1983-09-01T23:59:59.000Z

332

Ultra High Voltage Transmission Technology : Italy-USA Joint Workshop, July 26-28, 1982, Hilton Hotel, Portland, Oregon, USA.  

SciTech Connect

Twenty-five papers are presented in the following areas: electric field effects, overhead lines, substations and cables, and electric load modeling. One US DOE paper is processed separately. (DLC)

United States. Bonneville Power Administration; Ente Nazionale Per L' Energia Elettrica.

1982-01-01T23:59:59.000Z

333

Sulfone-based electrolytes for high voltage li-ion batteries.  

Science Conference Proceedings (OSTI)

Sulfone-based electrolytes have been investigated as electrolytes for lithium-ion cells using high-voltage positive electrodes, such as LiMn{sub 2}O{sub 4} and LiNi{sub 0.5}Mn{sub 1.5}O{sub 4} spinels, and Li{sub 4}Ti{sub 5}O{sub 12} spinel as negative electrode. In the presence of imide salt (LiTFSI) and ethyl methyl sulfone or tetramethyl sulfone (TMS) electrolytes, the Li{sub 4}Ti{sub 5}O{sub 12}/LiMn{sub 2}O{sub 4} cell exhibited a specific capacity of 80 mAh g{sup -1} with an excellent capacity retention after 100 cycles. In a cell with high-voltage LiNi{sub 0.5}Mn{sub 1.5}O{sub 4} positive electrode and 1 M LiPF{sub 6} in TMS as electrolyte, the capacity reached 110 mAh g{sup -1} at the C/12 rate. When TMS was blended with ethyl methyl carbonate, the Li{sub 4}Ti{sub 5}O{sub 12}/LiNi{sub 0.5}Mn{sub 1.5}O{sub 4} cell delivered an initial capacity of 80 mAh g{sup -1} and cycled fairly well for 1000 cycles under 2C rate. The exceptional electrochemical stability of the sulfone electrolytes and their compatibility with the Li{sub 4}Ti{sub 5}O{sub 12} safer and stable anode were the main reason behind the outstanding electrochemical performance observed with high-potential spinel cathode materials. These electrolytes could be promising alternative electrolytes for high-energy density battery applications such as plug-in hybrid and electric vehicles that require a long cycle life.

Abouimrane, A.; Belharouak, I.; Amine, K. (Chemical Sciences and Engineering Division)

2009-05-01T23:59:59.000Z

334

EPRI High-Voltage Direct Current (HVDC) Reference Book: Chapter 24 - Operation and Maintenance of HVDC Systems  

Science Conference Proceedings (OSTI)

This report contains descriptions of the operation and maintenance (O&M) activities of traditional high-voltage direct current (HVDC) line commutated (thyristor-based) and voltage-sourced converter (VSC) transmission systems. Both long-distance transmission schemesincluding the transmission linesand back-to-back schemes are included. The various tasks involved in the O&M of HVDC systems are described at some length, and a range of estimates is given for the staff requirements to carry out these activitie...

2010-01-19T23:59:59.000Z

335

High Voltage MOSFET Gate/Bulk Driver Controller for a Microbattery Switch Matrix in a 0.35 µm Microwave SOI Technology  

Science Conference Proceedings (OSTI)

Integrated microbatteries are being currently developed to act as a "micropower" source in microsatellites. The current and voltage rating of the microbattery is fixed. Certain highly miniaturized systems require higher voltages and currents. A switching ... Keywords: LDMOSFET, SOI, microbattery, micropower

Vinesh Sukumar; Mahmoud Alahmad; Kevin Buck; Herbert Hess; Harry Li; Dave Cox; Fadi Nessir Zghoul; Jeremy Jackson; Stephen Terry; Ben Blalock; M. M. Mojarradi; W. C. West; J. F. Whitacre

2005-09-01T23:59:59.000Z

336

Grizzly Substation Fiber Optics : Environmental Assessment.  

SciTech Connect

This notice announces BPA`s decision to construct, operate, and maintain the Grizzly Substation Fiber Optic Project (Project). This Project is part of a continuing effort by BPA to complete a regionwide upgrade of its existing telecommunications system. The US Forest Service and BPA jointly prepared the Grizzly Substation Fiber Optic Project Environmental Assessment (EA) (DOE/EA-1241) evaluating the potential environmental impacts of the Proposed Action, the Underground Installation Alternative, and the No Action Alternative. Based on the analysis in the EA, the US Forest Service and BPA have determined that the Proposed Action is not a major Federal action significantly affecting the quality of the human environment, within the meaning of the National Environmental Policy Act (NEPA) of 1969. Therefore, the preparation of an Environmental Impact Statement (EIS) is not required and BPA is issuing this FONSI. The US Forest Service has separately issued a FONSI and Decision Notice authorizing BPA to construct, operate, and maintain the Project within the Crooked River National Grassland (Grassland).

United States. Bonneville Power Administration.

1998-02-01T23:59:59.000Z

337

Simplified two layer model substation ground grid design methodology  

SciTech Connect

This paper presents a simplified approach to the design of substation ground grids in non-uniform soil conditions. The procedure is based on the interpretation of principles enunciated in the IEEE Standard 80-1986, with the supporting data having been obtained from actual field tests on substation ground grids.

Lazzara, J.; Barbeito, N. (Florida Power Corp., St. Petersburg, FL (USA))

1990-10-01T23:59:59.000Z

338

In Situ Environmental Remediation of an Energized Substation  

Science Conference Proceedings (OSTI)

The remediation of contaminated soil and groundwater at energized substations presents special technical, safety, and cost challenges to affected utilities. This study, conducted at an energized substation contaminated with arsenic, evaluated remedial technologies for groundwater and soil treatment and analyzed their cost effectiveness.

2001-12-04T23:59:59.000Z

339

STUDY and analysis of systems for monitoring in power substations  

Science Conference Proceedings (OSTI)

The intensive development of science and technology in all areas of our daily live reflects and in the systems for monitoring and recording processes of abnormal modes in the power equipment of substations. Monitoring systems report their apogee in the ... Keywords: application, development, monitoring system, power substation

Nikolina Petkova; Valeri Mladenov; Angel Tsolov; Petar Nakov; Georgi Bozukov

2011-07-01T23:59:59.000Z

340

ANUEADflM-31 Electric Power High-Voltage Transmission Lines:  

Office of Scientific and Technical Information (OSTI)

ANUEADflM-31 ANUEADflM-31 Electric Power High-Voltage Transmission Lines: Design Options, Cost, and Electric and Magnetic Field Levels by J.B. Stoffel,' E.D. Pentecost, R.D. Roman, and P.A. Traczyk Environmental Assessment Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 November 1994 Work sponsored by United States Department of Energy, Assistant Secretary for Fossil Energy, Office of Fuels Program Stoffel is affiliated with Argonne's Electronics and Computing Technologies Division. D4SlRlBUTlON OF THIS DOCUMENT IS UNLiMltEb - . - . - . - . ... - , . ^ ~ .. , . . . , . . _ I T h i s report i s printed on recycled paper. @ . . .. . ' . . . A :_ - .. ., . . DISCLAIMER This report was .prepared as an account of work sponsored by an agency of the United States Government. Neither

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

ESS 2012 Peer Review - Low Cost, Manufacturable High Voltage Power Module for ESS - Brandon Passmore, APEI  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

W. Research Center Blvd. * Fayetteville, AR 72701 * (479) 443-5759 W. Research Center Blvd. * Fayetteville, AR 72701 * (479) 443-5759 Design and Development of a Low Cost, Manufacturable High Voltage Power Module for Energy Storage Systems Phase I SBIR September 27, 2012 Brandon Passmore, PhD Sr. Electronics Packaging Research Engineer Email: bpassmo@apei.net Acknowledgements * I would like to thank Dr. Imre Gyuk of the DOE Energy Storage Systems Program and Dr. Stan Atcitty for technical support * I would also like to thank 2 Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.

342

Artificial SEI Enables High-Voltage Lithium-ion Batteries | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Functional Materials for Energy Functional Materials for Energy Artificial SEI Enables High-Voltage Lithium-ion Batteries September 03, 2013 Efficacy of Lipon coating as an artificial SEI for suppression of electrolyte decomposition on a 5V spinel cathode: coulombic efficiency was measured versus cycle numbers at samples with different coating thickness. An artificial solid electrolyte interphase (SEI) of lithium phosphorus oxynitride (Lipon) enables the use of 5V cathode materials with conventional carbonate electrolytes in lithium-ion batteries. Five volt cathode materials, such as LiNi0.5Mn1.5O4, are desirable to provide higher energy, however conventional carbonate electrolytes decompose above 4.5V compromising the battery performance. This work shows that Lipon coating suppresses the electrolyte decomposition, as measured by the

343

RECORD OF CATEGORICAL EXCLUSION DETERMINATION Hygiene Substation Access Road Repairs  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hygiene Substation Access Road Repairs Hygiene Substation Access Road Repairs A. Brief Description of Proposal: Western Area Power Administration proposes to repair the access road/driveway into the Hygiene Substation. There is a low spot in the middle of the driveway that impedes maneuvering oflarge maintenance equipment in and out of the yard. Western plans to fill the low spot with road base and crumbled concrete fill. The Hygiene Substation is located in Boulder County, approximately 2 miles northwest of Longmont, CO (T3N, R69W, Sec 18). All proposed construction will occur within the existing, disturbed substation access road/driveway. B. Number and Title of tile Categorical Exclusion Being Applied: (See text in 10 CFR 1021, Subpart D.) BI.3 Routine maintenance activities and custodial services for buildings, structures,

344

BRIEFINGS ON PHYSICAL SECURITY OF ELECTRICITY SUBSTATIONS - SAN JOSE, CA  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

BRIEFINGS ON PHYSICAL SECURITY OF ELECTRICITY SUBSTATIONS - SAN BRIEFINGS ON PHYSICAL SECURITY OF ELECTRICITY SUBSTATIONS - SAN JOSE, CA BRIEFINGS ON PHYSICAL SECURITY OF ELECTRICITY SUBSTATIONS - SAN JOSE, CA Briefings on Physical Security of Electricity Substations The Department of Energy (DOE) and Department of Homeland Security (DHS), in coordination with the Federal Bureau of Investigation, the Federal Energy Regulatory Commission's Office of Energy Infrastructure Security, the Electricity Sector Information Sharing and Analysis Center (ES-ISAC), North American Electricity Reliability Corporation (NERC), and industry experts, will conduct a series of briefings across the country with electricity sector owners and operators, and local law enforcement on the physical security of electricity substations. The session for FEMA Region IX will be held in San Jose, CA and hosted by

345

Status of High Polarization DC High Voltage GaAs Photoguns  

SciTech Connect

This talk will review the state of the art of high polarization GaAs photoguns used worldwide. Subject matter will include drive laser technology, photocathode material, gun design, vacuum requirements and photocathode lifetime as a function of beam current. Recent results have demonstrated high current, 85% polarized beams with high reliability and long lifetime under operational conditions. Research initiatives for ensuring production of high average and peak current beams for future accelerator facilities such as ELIC and the ILC will be also discussed.

P. A. Adderley; J. Brittian; J. Clark; J. Grames; J. Hansknecht; J. McCarter; M. Poelker; M. L. Stutzman; R. Suleiman; K. E. L. Surles-Law

2007-08-01T23:59:59.000Z

346

PRESENT AND FUTURE TECHNOLOGY OF HIGH VOLTAGE SYSTEMS FOR NEUTRAL BEAM INJECTORS  

E-Print Network (OSTI)

the accel voltage reg­ ulation requirement could be relaxedVOLTAGE SWITCHES TUBES SCR ASSEMBLIES CROSSED-FIELD INTERRUPTERS MAGNETIC CORE ARC SNUEBER3 COMPUTERS FOR CONTROL AND DIAGNOSTICS OPERATIONAL REQUIREMENTSvoltage- regulated (flat-topped) to 1%. If good regulation Is not a prime requirement,

Baker, W.R.

2011-01-01T23:59:59.000Z

347

An Ultra-Compact Marx-Type High-Voltage Generator  

DOE Green Energy (OSTI)

This paper discusses the design of an ultra-compact, Marx-type, high-voltage generator. This system incorporates high-performance components that are closely coupled and integrated into an extremely compact assembly. Low profile, custom ceramic capacitors with coplanar extended electrodes provide primary energy storage. Low-inductance, spark-gap switches incorporate miniature gas cavities imbedded within the central region of the annular shaped capacitors, with very thin dielectric sections separating the energy storage capacitors. Carefully shaped electrodes and insulator surfaces are used throughout to minimize field enhancements, reduce fields at triple-point regions, and enable operation at stress levels closer to the intrinsic breakdown limits of the dielectric materials. Specially shaped resistors and inductors are used for charging and isolation during operation. Forward-coupling ceramic capacitors are connected across successive switch-capacitor-switch stages to assist in switching. Pressurized SF, gas is used for electrical insulation in the spark-gap switches and throughout the unit. The pressure housing is constructed entirely of dielectric materials, with segments that interlock with the low-profile switch bodies to provide an integrated support structure for all of the components. This ultra-compact Marx generator employs a modular design that can be sized as needed for a particular application. Units have been assembled with 4, 10, and 30 stages and operated at levels up to 100 kV per stage.

Goerz, D; Ferriera, T; Nelson, D; Speer, R; Wilson, M

2001-06-15T23:59:59.000Z

348

Current-Voltage and Capacitance-Voltage characteristics of Pd ...  

Science Conference Proceedings (OSTI)

Presentation Title, Current-Voltage and Capacitance-Voltage characteristics of Pd ... Nonlocal Modeling in High Rate Deformation and Ductile Fracture of ...

349

Power Transformer Application for Wind Plant Substations  

Science Conference Proceedings (OSTI)

Wind power plants use power transformers to step plant output from the medium voltage of the collector system to the HV or EHV transmission system voltage. This paper discusses the application of these transformers with regard to the selection of winding configuration, MVA rating, impedance, loss evaluation, on-load tapchanger requirements, and redundancy.

Behnke, M. R. [IEEE PES Wind Plant Collector System Design Working Group; Bloethe, W.G. [IEEE PES Wind Plant Collector System Design Working Group; Bradt, M. [IEEE PES Wind Plant Collector System Design Working Group; Brooks, C. [IEEE PES Wind Plant Collector System Design Working Group; Camm, E H [IEEE PES Wind Plant Collector System Design Working Group; Dilling, W. [IEEE PES Wind Plant Collector System Design Working Group; Goltz, B. [IEEE PES Wind Plant Collector System Design Working Group; Li, J. [IEEE PES Wind Plant Collector System Design Working Group; Niemira, J. [IEEE PES Wind Plant Collector System Design Working Group; Nuckles, K. [IEEE PES Wind Plant Collector System Design Working Group; Patino, J. [IEEE PES Wind Plant Collector System Design Working Group; Reza, M [IEEE PES Wind Plant Collector System Design Working Group; Richardson, B. [IEEE PES Wind Plant Collector System Design Working Group; Samaan, N. [IEEE PES Wind Plant Collector System Design Working Group; Schoene, Jens [IEEE PES Wind Plant Collector System Design Working Group; Smith, Travis M [ORNL; Snyder, Isabelle B [ORNL; Starke, Michael R [ORNL; Walling, R. [IEEE PES Wind Plant Collector System Design Working Group; Zahalka, G. [IEEE PES Wind Plant Collector System Design Working Group

2010-01-01T23:59:59.000Z

350

Ceramic end seal design for high temperature high voltage nuclear instrumentation cables  

DOE Patents (OSTI)

A coaxial, hermetically sealed end structure is described for electrical instrumentation cables. A generally tubular ceramic body is hermetically sealed within a tubular sheath which is in turn sealed to the cable sheath. One end of the elongated tubular ceramic insulator is sealed to a metal end cap. The other end of the elongated tubular insulator has an end surface which is shaped concave relative to a central conductor which extends out of this end surface. When the end seal is hermetically sealed to an instrumentation cable device and the central conductor is maintained at a high positive potential relative to the tubular metal sheath, the electric field between the central conductor and the outer sheath tends to collect electrons from the concave end surface of the insulator. This minimizes breakdown pulse noise generation when instrumentation potentials are applied to the central conductor.

Meiss, James D. (Berkeley, CA); Cannon, Collins P. (Kennewick, VA)

1979-01-01T23:59:59.000Z

351

Abstract--The latest technology development makes many intelligent electronic devices (IEDs) available in substations  

E-Print Network (OSTI)

) available in substations today. This brings an opportunity for adding new functionalities that go well beyond what the traditional substation automation solutions have provided. The substation automation role and asset management. Index Terms--substation automation, expert system, genetic algorithm, intelligent

Kezunovic, Mladen

352

Abstract--Substation data integration is facilitated by existence and appropriate connection of Intelligent Electronic  

E-Print Network (OSTI)

1 Abstract--Substation data integration is facilitated by existence and appropriate connection and substation topology transitions etc. Processed data may be used locally and/or communicated to remote sites (neighboring substations and/or control centers). The paper presents software that implements substation data

Kezunovic, Mladen

353

A low-power, high-bandwidth LDO voltage regulator with no external capacitor  

E-Print Network (OSTI)

A low-dropout (LDO) voltage regulator for low-power applications is designed without an external capacitor for compensation. The regulator has two stages, the first a folded cascode amplifier and the second a large pass ...

Ha, Miranda J. (Miranda Joy)

2008-01-01T23:59:59.000Z

354

Effect of MOSFET threshold voltage variation on high-performance circuits  

E-Print Network (OSTI)

The driving force for the semiconductor industry growth has been the elegant scaling nature of CMOS technology. In future CMOS technology generations, supply and threshold voltages will have to continually scale to sustain ...

Narendra, Siva G. (Siva Gurusami), 1971-

2002-01-01T23:59:59.000Z

355

Assessment of research directions for high-voltage direct-current power systems. Final report  

Science Conference Proceedings (OSTI)

High voltage direct current (HVDC) power transmission continues to be an emerging technology nearly thirty years after its introduction into modern power systems. To date its use has been restricted to either specialized applications having identifiable economic advantages (e.g., breakeven distance) or, rarely, applications where decoupling is needed. Only recently have the operational advantages (e.g., power modulation) of HVDC been realized on operating systems. A research project whose objective was to identify hardware developments and, where appropriate, system applications which can exemplify cost and operational advantages of integrated ac/dc power systems is discussed. The three principal tasks undertaken were: assessment of equipment developments; quantification of operational advantages; and interaction with system planners. Interest in HVDC power transmission has increased markedly over the past several years, and many new systems are now being investigated. The dissemination of information about HVDC, including specifically the symposium undertaken for Task 3, is a critical factor in fostering an understanding of this important adjunct to ac power transmission.

Long, W F

1982-09-01T23:59:59.000Z

356

Research on Fault Diagnosis on High Voltage SF6 Circuit Breaker Based on the Db Wavelet and Fuzzy Theory  

Science Conference Proceedings (OSTI)

This dissertation aims at providing a quick and accurate fault diagnosis method for on high voltage SF6circuit breaker. This method indirectly monitors the functioning of the breaker by observing the electric current in the coil of its switch. The electrical ... Keywords: SF6 circuit breaker, monitor, wavelet transform, fuzzy theory

Li Yang; Zhuo Yang; Yang Lei; Kejie Dai; Weiming Guan

2012-05-01T23:59:59.000Z

357

A Value Proposition for Developing an Industry Database for High Voltage Circuit Breakers & CIM Data Objects for T&D  

Science Conference Proceedings (OSTI)

EPRI initiated work to develop databases for performance analysis and benchmarking in order to address issues of performance data availability, support industry efforts to maximize power delivery asset values, and optimize maintenance activities. With the successful development of an industrywide database for distribution cables and the extension of that work to power transformers, interest has turned to high-voltage circuit breakers (HVCBs).

2007-11-19T23:59:59.000Z

358

A three-level buck converter to regulate a high-voltage DC-to-AC inverter  

E-Print Network (OSTI)

A three-level buck converter is designed and analyzed, and shown to be suitable as a high-voltage down converter as a pre-regulation stage for a 600 watt DC-to-AC power inverter. Topology selection for the inverter is ...

Schrock, Kenneth C

2008-01-01T23:59:59.000Z

359

Assessing the Usefulness of Distributed Measurements in the Smart Grid  

E-Print Network (OSTI)

38 – A-to-ground: phase A voltage from substation to faultHigh-Z A-to-ground: phase A voltage from substation to fault38 – A-to-ground: phase A voltage from substation to fault

Framhein, Theodore Anthony

2012-01-01T23:59:59.000Z

360

Substation in Clark County, Nevada RECORD OF CATEGORICAL EXCLUSION DETERMINATION  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Substation for soil remediation. Substation for soil remediation. The attached map shows the borrow area which is situated in Sections 18, 19,20 Township 18 South Range 64 East, Mount Diablo Meridian, Clark County, Nevada. The corresponding U.S.G.S. 7.S-minute topographic maps are Apex, Dry Lake, Dry Lake NW, and Dry Lake SE, Nevada. B. Categorical Exclusion Applied: 10 CFR, Part 1021, Subpart D, Appendix B, B4.11: "Construction of electric power substations with power delivery at 230kV or below or modification of existing sUbstations." C. Regulatory Requirements in 10 CFR 1021.410 Ib): 1. The proposed action fits within a class of actions that is listed in Appendix B to Subpart D. a. The proposed action was reviewed for the requirements of the Endangered Species Act, the National Environmental Policy Act (NEPA), the National

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Substation in Clark County, Nevada RECORD OF CATEGORICAL EXCLUSION DETERMINATION  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SUbstation for soil remediation. SUbstation for soil remediation. The attached map shows the borrow area which is situated in Sections 18, 19,20 Township 18 South Range 64 East, Mount Diablo Meridian, Clark County, Nevada. The corresponding U.S.G.S. 7.5-minute topographic maps are Apex, Dry Lake, Dry Lake NW, and Dry Lake SE, Nevada. B. Categorical Exclusion Applied: 10 CFR, Part 1021, Subpart D, Appendix B, B4.11: "Construction of electric power substations with power delivery at 230kV or below or modification of existing SUbstations." C. Regulatory Requirements in 10 CFR 1021.410 (b): 1. The proposed action fits within a class of actions that is listed in Appendix B to Subpart D. a. The proposed action was reviewed for the requirements of the Endangered Species Act, the National Environmental Policy Act (NEPA), the National

362

APS team works smarter, cuts substation construction costs by 36%  

SciTech Connect

An aggressive, cost-cutting, team of T D employees at Arizona Public Service Co (APS) is building a new distribution substation in Phoenix for less than half the original cost that APS planners had calculated for the project's land, labor and materials. Scheduled for service in June of this year, APS analysts had originally projected land, labor and materials costs for the 20-MVA Bell substation at nearly $1.7-million-not including major equipment such as transformers, circuit breakers, and switches. However, after studying the project, an empowered APS crew was able to slash 36% off the original estimate-more than $610,000. What's more, APS spokesmen say that its new approach to substation construction and design has given its engineers and construction crews a laundry list of additional ideas to try out on future substation ventures. 4 figs., 1 tab.

Not Available

1993-05-01T23:59:59.000Z

363

Transmission and Substations Research and Development News, May 2013  

Science Conference Proceedings (OSTI)

This is the May 2013 issue of Transmission and Substations Research and Development News, a newsletter that provides an update on some of the latest research results, emerging industry issues, field deployments, and member-specific experiences.

2013-05-17T23:59:59.000Z

364

Development of extruded and molded straight joint for ultra high-voltage XLPE cable  

Science Conference Proceedings (OSTI)

In Japan, 154-kV crosslinked polyethylene-insulated cables (XLPE) are already in use for long-distance tranmission lines, but 275-kV XLPE cables are used only for short-distance lines (without joints) on the premises of power-generation plants and substations. 275-kV XLPE cable is expected to be used for long-distance transmission lines in the near future because of its overall cost advantage. To respond to this need, a straight-through joint with the same reliability as the cable should be developed. Reliable joints should be formed and molded with the same curable PE compounds as the cable insulation. At present, 154-kV XLPE cables for long-distance transmission lines are usually constructed with the joint comprising XLPE insulation wrapped with curable PE tape and molded by heating. However, this taped molded joint has the disadvantages of troublesome tape handling. On the other hand, extruded molded joints are constructed by injecting curable melted PE into a mold with an extruder, eliminating contamination. The report describes the characteristics of the extruded and molded joint developed for 154, 275 and 500 kV class XLPE cables.

Shimomura, T.; Ando, K.; Asahi, K.; Sugiyama, K.

1986-01-01T23:59:59.000Z

365

Best Practices Guide to Securing Wireless Substation Applications  

Science Conference Proceedings (OSTI)

The use of wireless communications in substations raises a number of security concerns. This report, an updated version of EPRI report 1013810) identifies wireless security best practices for electric substation applications, giving special consideration to a defense-in-depth approach to wireless security. The emphasis is on technical, administrative, and operational security controls. In addition to discussing the defense-in-depth concept, the report also examines training activities and rogue device de...

2009-02-18T23:59:59.000Z

366

Technologies for Remote Monitoring of Substation Assets: Physical Security  

Science Conference Proceedings (OSTI)

This report assesses the benefits of including remote monitoring with the various security technologies used for providing physical security to substation facilities and equipment. This remote monitoring provides near-real-time security information on the access points to substation facilities as well as the status and health of equipment to determine if the equipment has been tampered with or is otherwise not functioning correctly. The types of security technologies include locks at gates and doors, vid...

2006-03-13T23:59:59.000Z

367

Substation Equipment Maintenance Experience Sharing Database Version 1.0  

Science Conference Proceedings (OSTI)

EPRI has been engaged in research on maintenance, forensics, and decommissioning of substation equipment. There is a need to make this information available to EPRI members in an easily accessible format. The Substation Equipment Maintenance Experience Sharing Database provides an application to house all the information, learnings, and experiences gathered from the research studies in an easily accessible format.Benefits & ValueAccess to EPRI’s worldwide ...

2012-11-20T23:59:59.000Z

368

UCA Substation Communication Initiative Workshop: Meeting/Presentation, August 1999  

Science Conference Proceedings (OSTI)

This report presents a summary of the presentation material from the Utility Communication Architecture (UCA) Communication Initiative Workshop held August 1999. Included are diagrams of models for UCA applications that can be integrated into substation communications systems. The Power System Object Model (PSOM) is described, as well as a communication service model (CASM). A brief discussion on the interface, Generic Object Models for Substation and Feeder Equipment (GOMSFE), is also included in this r...

1999-08-18T23:59:59.000Z

369

National SCADA Test Bed Substation Automation Evaluation Report  

Science Conference Proceedings (OSTI)

Increased awareness of the potential for cyber attack has recently resulted in improved cyber security practices associated with the electrical power grid. However, the level of practical understanding and deployment of cyber security practices has not been evenly applied across all business sectors. Much of the focus has been centered on information technology business centers and control rooms. This report explores the current level of substation automation, communication, and cyber security protection deployed in electrical substations throughout existing utilities in the United States. This report documents the evaluation of substation automation implementation and associated vulnerabilities. This evaluation used research conducted by Newton-Evans Research Company for some of its observations and results. The Newton Evans Report aided in the determination of what is the state of substation automation in North American electric utilities. Idaho National Laboratory cyber security experts aided in the determination of what cyber vulnerabilities may pose a threat to electrical substations. This report includes cyber vulnerabilities as well as recommended mitigations. It also describes specific cyber issues found in typical substation automation configurations within the electric utility industry. The evaluation report was performed over a 5-month period starting in October 2008

Kenneth Barnes; Briam Johnson

2009-10-01T23:59:59.000Z

370

Measurement and characterization of substation electromagnetic transients. Final report  

SciTech Connect

Little quantitative data exists on radiated electromagnetic interference in substations arising from substation transients. The electromagnetic transient noise produced by normal substation activity such as opening switches and breakers can be significant. Additionally, abnormal events such as faults cause similar electromagnetic noise. The lack of data is in part because suitable measurement equipment techniques have not been generally available to utilities. A new approach to the measurement and characterization of electromagnetic interference caused by substation transients has been developed. A data acquisition system for measurements has been designed and constructed for field use with a bandwidth capability exceeding 100 MHz. Measurements have been taken from staged operations in substations and the resulting data analyzed using specialized computer programs developed for this project. The measurement techniques are presented and the analysis procedures explained in detail. The transients caused by equipment operations in several substations have been studied resulting in an understanding of the expected or typical amplitudes and frequencies of the resulting noise. Suggestions as to equipment tests and withstand levels have been made. An appendix includes raw and analyzed data for research use.

Russell, B.D.

1983-03-01T23:59:59.000Z

371

765kV Transmission line Voltage gradient  

E-Print Network (OSTI)

Corona ring Transmission lines Nowadays, due to the ever increasing energy consumption and power supply optimization, it is required to construct new power plants, substations and transmission lines. In Iran, also, because of increasing demand for electrical energy, for a significant power loss reduction in power transmission over long distances, and to construct high transmission lines that lead to reduction in the economic costs of transmission lines, the transmission lines must be considered at extra high voltage (EHV) levels. These EHV levels should be compared with the low voltage levels in order to extract the benefits. Therefore, in this paper, a review has been conducted on the types of 765 kV transmission lines used in different countries and a comparison between them and the low voltage levels have been performed. Accordingly, the advantages of EHV transmission lines are summarized. Finally, designing a line of 765 kV single-circuit with 6 conductors per bundle based on existing standards is presented.

unknown authors

2012-01-01T23:59:59.000Z

372

Characterization of the Li(Si)/CoS(2) couple for a high-voltage, high-power thermal battery  

DOE Green Energy (OSTI)

In order to determined the capabilities of a thermal battery with high-voltage and high-power requirements, a detailed characterization of the candidate LiSi/LiCl-LiBr-LiF/CoS{sub 2} electrochemical couple was conducted. The rate capability of this system was investigated using 0.75 inch-dia. and 1.25 inch-dia. single and multiple cells under isothermal conditions, where the cells were regularly pulsed at increasingly higher currents. Limitations of the electronic loads and power supplies necessitated using batteries to obtain the desired maximum current densities possible for this system. Both 1.25 inch-dia. and 3 inch-dia. stacks were used with the number of cells ranging from 5 to 20. Initial tests involved 1.25 inch-dia. cells, where current densities in excess of 15 A/cm{sup 2} (>200 W/cm{sup 2}) were attained with 20-cell batteries during 1-s pulses. In subsequent follow-up tests with 3 inch-dia., 10-cell batteries, ten 400-A 1-s pulses were delivered over an operating period often minutes. These tests formed the foundation for subsequent full-sized battery tests with 125 cells with this chemistry.

GUIDOTTI,RONALD A.; REINHARDT,FREDERICK W.

2000-02-01T23:59:59.000Z

373

High voltage capability electrical coils insulated with materials containing SF.sub.6 gas  

DOE Patents (OSTI)

A coil is made having a plurality of layers of adjacent metal conductor windings subject to voltage stress, where the windings have insulation therebetween containing a small number of minute disposed throughout its cross-section, where the voids are voids filled with SF.sub.6 gas to substitute for air or other gaseous materials in from about 60% to about 95% of the cross-sectional void volume in the insulation, thus incorporating an amount of SF.sub.6 gas in the cross-section of the insulation effective to substantially increase corona inception voltages.

Lanoue, Thomas J. (Muncie, IN); Zeise, Clarence L. (Penn Township, Allegheny County, PA); Wagenaar, Loren (Muncie, IN); Westervelt, Dean C. (Acme, PA)

1988-01-01T23:59:59.000Z

374

PRESENT AND FUTURE TECHNOLOGY OF HIGH VOLTAGE SYSTEMS FOR NEUTRAL BEAM INJECTORS  

E-Print Network (OSTI)

savings tn the power conditioning transformers would result.power supply would be extremely simple, involving as major components only primary contactors, voltage-variable transformer,transformer reactance. For the LBL 160-kV, 75-A NBSTF Accel power

Baker, W.R.

2011-01-01T23:59:59.000Z

375

A new converter fault discrimination method for a 12-pulse high-voltage direct current system based on wavelet transform and Hidden Markov Models  

Science Conference Proceedings (OSTI)

The progressive development in high-voltage direct current (HVDC) transmission enhances the need to implement an efficient protection scheme to distinguish the minimum faulty part of the system and to relieve the stressed equipment. This paper proposes ... Keywords: Discrete Hidden Markov Models, converter faults, fault discrimination, high-voltage direct current, wavelet transform

Mohamad Tahan; Hassan Monsef; Shahrokh Farhangi

2012-06-01T23:59:59.000Z

376

EPRI Comments on a French Study of Residential Proximity to High-Voltage Power Lines and Childhood Leukemia  

Science Conference Proceedings (OSTI)

Results of a French case-control epidemiologic study of residential proximity to high-voltage power lines and risk of childhood acute leukemia were published in the British Journal of Cancer.  The EPRI Comments provides background information on the study, summarizes the main results and discusses the study’s strength and limitations. The EPRI Comments also highlights an ongoing EPRI-funded epidemiologic study in California that is expected to provide further insight ...

2013-04-23T23:59:59.000Z

377

High-Voltage Direct Current Corona Testing of Transmission Line Hardware and Insulator Assemblies: Development of Test Methodology  

Science Conference Proceedings (OSTI)

When specifying hardware for new high-voltage direct current (HVDC) lines or replacement hardware for existing HVDC lines utilities generally require that the hardware meet specific corona performance requirements.While standards and test methods exist for testing hardware used on HVAC systems, no such material is available for HVDC systems.HVAC tests are sometimes conducted on the hardware and the results obtained are then related to HVDC by utilizing the peak HVAC line to ...

2013-12-20T23:59:59.000Z

378

EPRI Comments on a UK Case-Control Study of Magnetic Fields from High Voltage Power Lines and Childhood Cancer  

Science Conference Proceedings (OSTI)

A paper, entitled "Childhood cancer and magnetic fields from high voltage power lines in England and Wales: a case-control study," was published in the British Journal of Cancer on September 28, 2010. The authors assessed the association between exposure to EMF from power lines at the address of birth and childhood cancer. The current paper provides additional results to a study published earlier from the same data set in 2005. These EPRI comments provide an overview of study findings, conclusions, stren...

2010-12-22T23:59:59.000Z

379

Feasibility of thyristor controlled series capacitor for distribution substation enhancements  

Science Conference Proceedings (OSTI)

While Thyristor Controlled Series Capacitors (TCSCs) are already being used for control of transmission system power flows, the dynamic adjustment of transmission infeed impedances presents other system enhancement opportunities. In the case of the Con Edison system, distribution substation upgrades are severely constrained by limits to existing circuit breaker interrupting capabilities. Because additional transmission line infeeds cannot be provided without increasing fault current levels, a TCSC was investigated for use as a fault current limiter. In order to demonstrate proper operation in the current limiting mode, Electromagnetic Transients Program (EMTP) simulations were conducted. Three TCSC configurations are presented to illustrate that additional power can be provided during normal operation without increasing fault currents at the substation: (1) series compensation of existing 138 kV infeeds (to allow higher substation MVA uprates), (2) series compensation of new 138 kV infeeds (without fault current increases), and (3) a 13.8 kV TCSC compensated link between two substations (to allow regulated power transfer between substation buses).

Godart, T.F.; Imece, A.F.; McIver, J.C. [GE Industrial and Power Systems, Schenectady, NY (United States). Power Systems Engineering Dept.; Chebli, E.A. [Consolidated Edison Co. of New York Inc., New York, NY (United States)

1995-01-01T23:59:59.000Z

380

Integrated substation looks like one RTU to dispatchers  

SciTech Connect

Traditionally, supervisory control and data acquisition systems (Scada) use a master/slave arrangement. The master Scada computer polls individual circuit devices for information, or the devices may report (by exception) to the computer. The substation engineering department of Portland General Electric Co (PCE) is now pioneering a new arrangement in which all devices in a substation communicate with each other and a local computer over a data bus. A single communications line connects the Scada master to the same bus for control and/or monitoring. The new approach is known as a substation integration system (SIS). Thus, for a lower initial cost, substation integration: eliminates the need for redundant equipment - such as panel meters, annunciators, transducers, sequence-of-event recorders, auxiliary tripping relays. Scada RTU, control, and transfer switches; reduces control house size by 25% by reducing wiring and using panel space more efficiently; provides a standardized user interface for easy data access, both locally and remotely; is flexible and expandable because of its modularity and use of non-proprietary hardware and software; improves operability, maintainability and reliability through immediate access to key data; and, reduces overall life-cycle costs by reducing travel and outage time through remote access to substation information. 5 figs.

Koch, W.

1995-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Oxidation Potentials of Functionalized Sulfone Solvents for High-Voltage Li-Ion Batteries: A Computational Study  

Science Conference Proceedings (OSTI)

New electrolytes with large electrochemical windows are needed to meet the challenge for high-voltage Li-ion batteries. Sulfone as an electrolyte solvent boasts of high oxidation potentials. Here we examine the effect of multiple functionalization on sulfone's oxidation potential. We compute oxidation potentials for a series of sulfone-based molecules functionalized with fluorine, cyano, ester, and carbonate groups by using a quantum chemistry method within a continuum solvation model. We find that multifunctionalization is a key to achieving high oxidation potentials. This can be realized through either a fluorether group on a sulfone molecule or sulfonyl fluoride with a cyano or ester group.

Shao, Nan [ORNL; Sun, Xiao-Guang [ORNL; Dai, Sheng [ORNL; Jiang, Deen [ORNL

2012-01-01T23:59:59.000Z

382

Development of 1200-kV compressed-gas-insulated transmission and substation equipment in the United States  

SciTech Connect

Major research and development (R and D) programs for the development of sulfur hexafluoride (SF/sub 6/) compressed-gas-insulated (CGI) equipment for ultrahighvoltage (uhv) application at 100-1200 kV have been under way independently in both the United States and Japan. The CGI transmission and substation equipment under study and development in these countries has included the surge arrester, circuit breaker, CGI transmission bus, disconnect and ground switches, and an air-SF/sub 6/ termination. The US CGI program has also included development of a power transformer, shunt reactor, voltage- and current-sensing instrumentation, and a line trap, all for 1200-kV application. This paper presents the overall status of development of CGI substation equipment for uhv application in the United States. It describes the major CGI components developed, highlights their key design aspects, indicates the present status of development and testing, and addresses the work remaining to establish final design consepts. The paper also includes 23 references, a number of which have not been widely distributed or included in any of the recently published bibliographies of uhv substation equipment.

Walldorf, S.P.; Gnadt, P.A.

1986-01-01T23:59:59.000Z

383

EIS-0483: Estes to Flatiron Substation Transmission Lines Rebuild Project,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3: Estes to Flatiron Substation Transmission Lines Rebuild 3: Estes to Flatiron Substation Transmission Lines Rebuild Project, Larimer County, CO EIS-0483: Estes to Flatiron Substation Transmission Lines Rebuild Project, Larimer County, CO SUMMARY DOE's Western Area Power Administration (Western) owns and operates two 16-mile, 115-kilovolt transmission lines on separate rights-of-way between Flatiron Reservoir (near Loveland, Colorado) and the town of Estes Park, Colorado. Western is preparing this EIS to evaluate the environmental impacts of a proposal to upgrade and co-locate these transmission lines, by removing one and abandoning its right-of-way, and rebuilding the other along the existing right-of-way as a double-circuit line (i.e., six conductors per pole). The USDA Forest Service, Arapaho and Roosevelt National Forest, is a cooperating agency in preparing the EIS to support

384

Microsoft Word - CX- Eugene Substation Fiber_130520.docx  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3 3 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Jonathan Toobian Project Manager - TPC-TPP-4 Proposed Action: Eugene Substation Fiber Interconnection Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B 4.7 Fiber Optic Cable Location: Eugene, Lane County, Oregon Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes allowing Light Speed Networks (LSN) to interconnect with its existing fiber optic network at BPA's Eugene substation in Lane County, Oregon. To interconnect to BPA's fiber network, LSN would install two new below ground fiber optic vaults within BPA's existing right-of-way. The first vault would be installed on BPA fee-owned land immediately south of the existing substation entrance, while the second vault

385

PROBE: a feasibility demonstration of substation and distribution automation  

SciTech Connect

Substation and distribution automation has existed for a number of years with varying degrees of sophistication. Recently trial installations have been initiated utilizing digital computer technology and advanced electronics to accomplish automation of certain substation functions. Investigations are also under way of remote meter reading and customer load management. The PROBE project is a research investigation to determine the feasibility of sampling data and creation of a data base to achieve these functions using digital techniques. A key objective of PROBE is to demonstrate the feasibility of utilizing data base information to make sophisticated decisions automatically and achieve a degree of coordination between functions not hitherto attainable. The equipment used, test procedures and results are described. Experience from the PROBE feasibility demonstration and Phase 1 tests show that the described substation and distribution automation implementation techniques are viable.

Croghan, J.F. (Commonwealth Edison Co., Maywood, IL); Jenkins, D.R.; Rushden, F.A.; Bunch, J.B.; Gurr, G.P.

1977-01-01T23:59:59.000Z

386

Switching surge test results ehv substation bus configurations  

SciTech Connect

The industry has been actively engaged in, and has presented many results of, ehv switching surge test programs associated with transmission line designs. It would seem equally important that similar efforts be staged relative to ehv switching surge capabilities of the terminal equipment as it would normally be found in its variety of configurations. Toward this end, a series of switching surge test programs on a number of substation bus configurations was conducted. Particular emphasis was placed on the determination of switching surge characteristics of the air gaps found in ehv substation bus designs. The test data are presented with pertinent data evaluations in an attempt to provide a more refined basis for the application of final judgments to bus designs for 345, 500, and 750 kV substations.

Hertig, G.E.; Kelly, W.B.

1966-08-01T23:59:59.000Z

387

A complete and normalized 61850 substation (Smart Grid Project) | Open  

Open Energy Info (EERE)

complete and normalized 61850 substation (Smart Grid Project) complete and normalized 61850 substation (Smart Grid Project) Jump to: navigation, search Project Name A complete and normalized 61850 substation Country Spain Headquarters Location Madrid, Spain Coordinates 40.488735°, -3.284912° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.488735,"lon":-3.284912,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

388

Effects of deteriorated and contaminated substation surface covering layers on foot resistance calculations  

Science Conference Proceedings (OSTI)

ANSI/IEEE Standard 80 is widely used to determine electrical currents flowing through the human body as the result of touch and step voltages near transmission and distribution facilities. This paper shows, however, that significant inaccuracies can occur when the ANSI/IEEE Standard 80 proposed method to calculate foot resistances is applied in substations covered by a thin layer of crushed rock or similar covering layers. In particular, it is shown that the errors obtained by using the infinite series expression of the foot resistance are consistently larger than those produced by the simplified expression for clean and contaminated surface layers. This paper also compares its results with those proposed recently in the literature. It is shown that these recent proposed equations may be subject to major errors under certain conditions. Equivalent Thevenin foot resistances are plotted for various scenarios of clean and contaminated surface covering layers.

Dawalibi, F.P.; Xiong, W.; Ma, J. (Safe Engineering Services and Technologies Ltd., Montreal, Quebec (Canada))

1993-01-01T23:59:59.000Z

389

The results of systems tests of the 500 kV busbar controllable shunting reactor in the Tavricheskaya substation  

Science Conference Proceedings (OSTI)

The results of systems tests of the 500 kV busbar magnetization-controllable shunting reactor (CSR), set up in the Tavricheskaya substation, including measurements of the quality of the electric power, the harmonic composition of the network currents of the reactor for different values of the reactive power consumed, the determination of the regulating characteristics of the reactor, the speed of response of the shunting reactor in the current and voltage stabilization modes, and also the operation of the reactor under dynamic conditions for different perturbations, are presented. The results obtained are analyzed.

Gusev, S. I. [JSC 'FSK EES' (Russian Federation); Karpov, V. N.; Kiselev, A. N.; Kochkin, V. I. [Scientific-Research Institute of Electric Power Engineering (VNIIE) - Branch of the JSC 'NTTs Elektroenergetiki', (Russian Federation)

2009-09-15T23:59:59.000Z

390

A monitor and control system for high voltage, gating, and triggering of a scintillating fiber active target  

SciTech Connect

A monitor and control system has been designed, constructed and tested at Notre Dame for the purpose of controlling all aspects of a Scintillating Fiber Acxtive Target system used in High Energy Physics Experimentation. The SFT Active Target system requires control of high voltages, gating, trigger counters, and monitoring. In addition, it resides in a radioactive area with very limited access. The control system uses a Leading Edge microcomputer, two specialized Z80-based processors, associated DACs, ADCs, discrete semiconductors, linear ICs and TTL and MECL logic. All of the hardware and software is custom-built; its design and performance is discussed.

Baumbaugh, B.; Bishop, J.; Gardner, R.W.; Mountain, R.J.; Ruchti, R.; Baumbaugh, A.; Knickerbocker, K.

1988-02-01T23:59:59.000Z

391

A monitor and control system for high voltage, gating, and triggering of a scintillating fiber active target  

SciTech Connect

A monitor and control system has been designed, constructed and tested at Notre Dame for the purpose of controlling all aspects of a Scintillating Fiber Active Target system used in High Energy Physics Experimentation. The SFT Active Target system requires control of high voltages, gating, trigger counters, and monitoring. In addition, it resides in a radioactive area with very limited access. The control system uses a Leading Edge microcomputer, two specialized Z80-based processors, associated DACs, ADCs, discrete semiconductors, linear ICs, and TTL and MECL logic. All of the hardware and software is custom-built; its design and performance is discussed. 5 refs., 4 figs.

Baumbaugh, B.; Bishop, J.; Gardner, R.W.; Mountain, R.J.; Ruchti, R.; Baumbaugh, A.; Knickerbocker, K.

1987-10-01T23:59:59.000Z

392

Ground resistance of concrete foundations in substation yards  

SciTech Connect

The reinforced concrete foundations in a substation yard have extensive reinforcing steel which is in metallic connection with the laid ground conductor. The foundations may contribute significantly to the dissipation of the fault and leakage currents. Simple to use equations and graphs are presented in this paper to determine the ground resistance of various types of foundations encountered in substation yards. The validity of the analytical approach has been verified with scale model tests. The ground resistance of the foundations estimated as suggested in the paper can be used to evaluate the role of the foundations as grounding element.

Thapar, B.; Ferrer, O. (Montana State Univ., Bozeman, MT (USA)); Blank, D.A. (Bonneville Power Administration, Portland, OR (USA))

1990-01-01T23:59:59.000Z

393

Turnkey substations can make sense. even for large utilities  

SciTech Connect

Large utilities with well-trained engineering staffs seldom consider buying a substation on a turnkey basis, but there are good and justifiable reasons for them to do so. A turnkey substation can reduce manpower requirements and eliminate cash-flow problems, especially when a new technology is involved. The utility also gains the benefit of its supplier's expertise. A turnkey supplier can perform all the planning, design, engineering, and financing functions besides assuming the responsibility to correct any errors made by subcontractors. The turnkey supplier becomes the project manager during construction, installation, testing, and start-up.

King, E.; Filippino, R.J.

1985-07-01T23:59:59.000Z

394

Operation of an on-line substation diagnosis system  

SciTech Connect

On-line monitoring systems for substation equipment are expected to give an impact on the improvement of the reliability of the power system. A monitoring system was applied to one of the newly built substations. It monitors the 204 kV and 72 kV GIS's and the transformer in their normal operation condition. The basic philosophy of the monitoring system and the principle of the detection of the abnormality is introduced together with the record of its operation in the first year.

Fujimoto, Y.; Ono, T. (Shikoku Electric Power Co., Inc., Takamatsu (JP)); Ibuki, K.; Taka, S. (Itami Works, Mitsubishi Electric Corp., Amagasaki (JP))

1988-10-01T23:59:59.000Z

395

Evaluating the availability of electrical substations: A dynamic methodology  

Science Conference Proceedings (OSTI)

This paper proposes a technique for evaluating the availability of substations and switching stations including the average cost of repairs of damaged equipment (corrective maintenance), the impact of disturbances on equipment availability, and the impact of disturbances on the continuity of the service provided by the substation. The approach is based on the concept of disruptive events, sequence-based processes, state graphs and Markov techniques. The paper illustrates the technique by comparing the availability of two possible station layouts. The results clearly show the benefit that can be obtained using this objective method of comparison.

Jourda, P.; Bourgade, E. [Electricite de France, Clamart (France); Allan, R.N. [UMIST, Manchester (United Kingdom). Manchester Centre for Electrical Energy

1996-10-01T23:59:59.000Z

396

Application Filling Requirements for Transmission Line and Substation  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Application Filling Requirements for Transmission Line and Application Filling Requirements for Transmission Line and Substation Construction Projects (Wisconsin) Application Filling Requirements for Transmission Line and Substation Construction Projects (Wisconsin) < Back Eligibility Agricultural Commercial Construction Developer Fed. Government Fuel Distributor General Public/Consumer Industrial Installer/Contractor Institutional Investor-Owned Utility Local Government Low-Income Residential Multi-Family Residential Municipal/Public Utility Nonprofit Residential Retail Supplier Rural Electric Cooperative Schools State/Provincial Govt Systems Integrator Transportation Tribal Government Utility Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Wind Solar Program Info

397

Synchrophasor Measurement Using Substation Intelligent Electronic Devices: Algorithms and Test Methodology  

E-Print Network (OSTI)

This dissertation studies the performance of synchrophasor measurement obtained using substation Intelligent Electronic Devices (IEDs) and proposes new algorithms and test methodology to improve and verify their performance when used in power system applications. To improve the dynamic performance when exposed to sinusoidal waveform distortions, such as modulation, frequency drift, abrupt change in magnitude, etc, an adaptive approach for accurately estimating phasors while eliminating the effect of various transient disturbances on voltages and currents is proposed. The algorithm pre-analyzes the waveform spanning the window of observation to identify and localize the discontinuities which affect the accuracy of phasor computation. A quadratic polynomial signal model is used to improve the accuracy of phasor estimates during power oscillations. Extensive experimental results demonstrate the advantages. This algorithm can also be used as reference algorithm for testing the performance of the devices extracting synchronized phasor measurements. A novel approach for estimating the phasor parameters, namely frequency, magnitude and angle in real time based on a newly constructed recursive wavelet transform is developed. This algorithm is capable of estimating the phasor parameters in a quarter cycle of an input signal. It features fast response and achieves high accuracy over a wide range of frequency deviations. The signal sampling rate and data window size can be selected to meet desirable application requirements, such as fast response, high accuracy and low computational burden. In addition, an approach for eliminating a decaying DC component, which has significant impact on estimating phasors, is proposed using recursive wavelet transform. This dissertation develops test methodology and tools for evaluating the conformance to standard-define performance for synchrophasor measurements. An interleaving technique applied on output phasors can equivalently increase the reporting rate and can precisely depict the transient behavior of a synchrophasor unit under the step input. A reference phasor estimator is developed and implemented. Various types of Phasor Measurement Units (PMUs) and PMU-enabled IEDs (Intelligent Electronic Devices) and time synchronization options have been tested against the standards using the proposed algorithm. Test results demonstrate the effectiveness and advantages.

Ren, Jinfeng

2011-12-01T23:59:59.000Z

398

Determination of the cathode and anode voltage drops in high power low-pressure amalgam lamps  

Science Conference Proceedings (OSTI)

For the first time, cathode and anode drops of powerful low-pressure amalgam lamps were measured. The lamp discharge current is 3.2 A, discharge current frequency is 43 kHz, linear electric power is 2.4 W/cm. The method of determination of a cathode drop is based on the change of a lamp operating voltage at variation of the electrode filament current at constant discharge current. The total (cathode plus anode) drop of voltage was measured by other, independent ways. The maximum cathode fall is 10.8 V; the anode fall corresponding to the maximal cathode fall is 2.4 V. It is shown that in powerful low pressure amalgam lamps the anode fall makes a considerable contribution (in certain cases, the basic one) to heating of electrodes. Therefore, the anode fall cannot be neglected, at design an electrode and ballast of amalgam lamps with operating discharge current frequency of tens of kHz.

Vasilyak, L. M., E-mail: vasilyak@ihed.ras.ru [Russian Academy of Sciences, Joint Institute for High Temperatures (Russian Federation); Vasiliev, A. I., E-mail: vasiliev@npo.lit.ru; Kostyuchenko, S. V.; Sokolov, D. V.; Startsev, A. Yu. [Joint Stock Company NPO LIT (Russian Federation); Kudryavtsev, N. N. [Moscow Institute of Physics and Technology (State University) (Russian Federation)

2011-12-15T23:59:59.000Z

399

Optical voltage reference  

DOE Patents (OSTI)

An optical voltage reference for providing an alternative to a battery source is described. The optical reference apparatus provides a temperature stable, high precision, isolated voltage reference through the use of optical isolation techniques to eliminate current and impedance coupling errors. Pulse rate frequency modulation is employed to eliminate errors in the optical transmission link while phase-lock feedback is employed to stabilize the frequency to voltage transfer function. 2 figures.

Rankin, R.; Kotter, D.

1994-04-26T23:59:59.000Z

400

Optical voltage reference  

DOE Patents (OSTI)

An optical voltage reference for providing an alternative to a battery source. The optical reference apparatus provides a temperature stable, high precision, isolated voltage reference through the use of optical isolation techniques to eliminate current and impedance coupling errors. Pulse rate frequency modulation is employed to eliminate errors in the optical transmission link while phase-lock feedback is employed to stabilize the frequency to voltage transfer function.

Rankin, R.; Kotter, D.

1992-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

A multi-functional platform for implementing intelligent and ubiquitous functions of smart substations under SCADA  

Science Conference Proceedings (OSTI)

For more efficient and economical management of substations under SCADA (Supervisory Control and Data Acquisition) systems, the concept of a smart substation has been introduced using intelligent and ubiquitous IT (Information Technology) techniques. ... Keywords: Embedded platform, Intelligent system, SCADA system, Smart substations, Ubiquitous

Hak-Man Kim; Jong-Joo Lee; Myong-Chul Shin; Seok-Soo Kim

2009-11-01T23:59:59.000Z

402

Improvements in dependability and usability for a substation automation system with redundancy  

Science Conference Proceedings (OSTI)

Substation Automation Systems (SAS) are widely used for the purpose of control, protection, monitoring, communication etc. in substations to improve the reliability of the power supply. SASs adopting IT based solutions such as Ethernet LAN have recently ... Keywords: IEC 61850, SAS, availability, dependability, redundant system, reliability, substation automation system, system architecture

Hachidai Ito; Keiichi Kaneda; Koichi Hamamatsu; Tatsuji Tanaka; Koichi Nara

2008-10-01T23:59:59.000Z

403

REQUIREMENTS SPECIFICATION FOR AND EVALUATION OF AN AUTOMATED SUBSTATION MONITORING SYSTEM  

E-Print Network (OSTI)

The Substation of the Future: A Feasibility Study Final Project Report Power Systems Engineering Research Center Empowering Minds to Engineer the Future Electric Energy System #12;Substation of the Future Engineering Research Center (PSERC) research project T-38 titled "Substation of the Future: A Feasibility

Kezunovic, Mladen

404

Sub-state Tying in Tied Mixture Hidden Markov Models Liang Gu and Kenneth Rose  

E-Print Network (OSTI)

engineering: substation automation, analysis of fault records, transient testing of protective relaysAbstract--Substation Intelligent Electronic Devices (IEDs) generate huge amount of data that may in substation or another database at different enterprise location. The collected data may be merged in real

California at Santa Barbara, University of

405

Powerline Communication System for Monitoring and Supervision of Feeder Equipments for MV Substation Automation  

E-Print Network (OSTI)

-2003, Substation Committee of the IEEE Power Engineering Society [3] C.R.Ozansoy, A.Zayegh, A.Kalam, "Communications for Substation Automation and Integration", In Australasian Universities Power Engineering Substation Automation LiPing LU1,2 , GangYan LI1 , YeQiong SONG2 1 ­ School of Mechanical and Electronical

Paris-Sud XI, Université de

406

REQUIREMENTS FOR AUTOMATED ANALYSIS OF SUBSTATION DATA Presented to: North American Transmission & Distribution Conference & Expo  

E-Print Network (OSTI)

of substations. Large scale deployment of IEDs creates huge amount of data either recorder continuously monitoring and signal processing in substation has become a powerful feature necessary to assure the system is reliable and secure. In this paper, the new monitoring and signal processing solution in substation based

Kezunovic, Mladen

407

Requirements Specification for and Evaluation of an Automated Substation Monitoring System  

E-Print Network (OSTI)

- substation design engineers, protective relay engineers, dispatchers in the control centers etc. AnotherRequirements Specification for and Evaluation of an Automated Substation Monitoring System Mladen for the Automated Analysis Substation System (AASS) implemented at Texas A&M University, aimed at monitoring

408

Abstract -The paper discusses automated substation data integration and analysis. Recorded data collected  

E-Print Network (OSTI)

Control and Data Acquisition (SCADA) and Energy Management System (EMS) applications of substation environment of substation automation project. It provides data to a number of application including automated1 Abstract--With the deregulation and restructuring of utility industry, many substation automation

Kezunovic, Mladen

409

Abstract--With the deregulation and restructuring of utility industry, many substation automation applications are being  

E-Print Network (OSTI)

Control and Data Acquisition (SCADA) and Energy Management System (EMS) applications of substation environment of substation automation project. It provides data to a number of application including automated1 Abstract--With the deregulation and restructuring of utility industry, many substation automation

410

Abstract--Nowadays, most substations are equipped with Intelligent Electronic Devices (IEDs) performing data collection.  

E-Print Network (OSTI)

Control and Data Acquisition (SCADA) and Energy Management System (EMS) applications of substation environment of substation automation project. It provides data to a number of application including automated1 Abstract--With the deregulation and restructuring of utility industry, many substation automation

Kezunovic, Mladen

411

Automated Integration of Substation IED Data to Generate Event Reports for Protection Engineers  

E-Print Network (OSTI)

by EPRI through project titled "Multiple Uses of Substation Data", Paul Myrda - project manager. #12;TABLEAutomated Integration of Substation IED Data to Generate Event Reports for Protection Engineers for automated integration of substation Intelligent Electronic Device (IED) data to generate a customized event

Kezunovic, Mladen

412

Preprint of the paper "A Boundary Element Formulation for the Substation Grounding Design"  

E-Print Network (OSTI)

Preprint of the paper "A Boundary Element Formulation for the Substation Grounding Design" I://caminos.udc.es/gmni #12;A BOUNDARY ELEMENT FORMULATION FOR THE SUBSTATION GROUNDING DESIGN I. Colominas, F. Navarrina A Boundary Element approach for the numerical computation of substation grounding systems is pre- sented

Colominas, Ignasi

413

Preprint of the paper "A Boundary Element Numerical Approach for Substation Grounding in a Two  

E-Print Network (OSTI)

Preprint of the paper "A Boundary Element Numerical Approach for Substation Grounding in a Two://caminos.udc.es/gmni #12;A BOUNDARY ELEMENT NUMERICAL APPROACH FOR SUBSTATION GROUNDING IN A TWO LAYER EARTH STRUCTURE3~na, SPAIN SUMMARY Analysis and design of substation grounding requires computing the distribution

Colominas, Ignasi

414

Charge Lifetime Study of K2CsSb Photocathode Inside a JLAB DC High Voltage Gun  

SciTech Connect

Two photocathodes are frequently considered for generating high average current electron beams and/or beams with high brightness for current and future accelerator applications: GaAs:Cs and K2CsSb. Each photocathode has advantages and disadvantages, and need to demonstrate performance at 'production' accelerator facilities. To this end a K2CsSb photocathode was manufactured at Brookhaven National Lab and delivered to Jefferson Lab within a compact vacuum apparatus at pressure {approx} 5 x 10{sup -11} Torr. This photocathode was installed inside a dc high voltage photogun biased at voltages up to 200 kV, and illuminated with laser light at 440 or 532 nm, to generate beams up to 20 mA. Photocathode charge lifetime measurements indicate that under some conditions this cathode has exceptionally high charge lifetime, without measurable QE decay, even from the center of the photocathode where operation using GaAs photocathodes is precluded due to ion bombardment. These studies also suggest a complex QE decay mechanism likely related to chemistry and localized heating via the laser beam.

Mammei, R.; Rao, T.; Suleiman, R.; Poelker, M.; Smedley, J.; McCarter, J.L.

2011-10-01T23:59:59.000Z

415

Active filters for high-voltage direct-current (HVDC) converter terminals: Final report  

SciTech Connect

This report evaluates the technical and economic feasibility for active filtering of dc-side voltage harmonics and the ac-side current harmonics produced by a HVDC converter. The following designs for the active filter concepts are compared with the existing ac-side and dc-side passive filters used at the Dickinson terminal of the CU HVDC transmission line project: the dc-side active filter consisting of a capacitor coupled current injection source to actively ''neutralize'' the 12th, 24th and the 36th harmonics and, the ac-side active filter designed to provide the same fundamental frequency reactive VARs as the existing passive filters. Controlled currents are injected to actively filter the 11th and the 13th harmonic currents. A cost comparison is made between these active filter designs and existing passive filters supplied by the United Power Association (UPA). 22 figs., 11 tabs.

Mohan, N.; Wong, C.

1988-08-01T23:59:59.000Z

416

SF6 dielectric behavior in a high voltage circuit breaker at low temperature under lightning impulses  

Science Conference Proceedings (OSTI)

This work concerns the study of the dielectric and thermodynamic behavior of SF{sub 6} in a 145 kV circuit breaker subjected to lightning impulse voltages in both polarities at temperatures varying from ambient (20 C) to {minus}45 C. The filling of the circuit breaker with SF{sub 6} is carried out at the reference point: T = 15 C, P = 6 bars abs. and d = 39.6 kg/m{sup 3}. Devices allowing to detect the appearance of local condensation of SF{sub 6} and to identify the breakdown between the circuit-breaker contacts and the flashover outside the circuit-breaker, are presented. The experimental results show a general tendency to a decrease in the U{sub 50%} voltage when the temperature is decreased at constant density (a decrease by about 5% when the temperature was decreased from +20 C to {minus}25 C). Such a variation would not have a significant influence in industrial practice. Even if this variation is very weak, it also appears from the obtained results that the gas density is not the only parameter which has an influence on the electric strength of the gas. However, to compare results at different temperatures, it would be better to make it at constant density and not at constant pressure, to avoid the dependency of the ratio (E/N) on N (where E is the electric strength and N the density). On the other hand, it seems that the presence of the liquid in the circuit breaker is not a penalizing parameter. The distribution of the electric field corresponding to the geometrical configuration of the studied circuit-breaker is also presented.

Buret, F.; Beroual, A. [Ecole Centrale de Lyon, Ecully (France)

1996-01-01T23:59:59.000Z

417

Simulation of an Electrical Substation Using the Bond Graph Technique  

Science Conference Proceedings (OSTI)

Simulation and especially computer simulation, is a basic tool since it enables engineers to understand how systems work without actually needing to see them. They can learn how they work in different circumstances and optimize their design with considerably ... Keywords: simulation, electrical substations, elements, electricity, bond graph

Gregorio Romero; Jesus Felez; Joaquin Maroto; Jose Manuel Mera

2008-04-01T23:59:59.000Z

418

Future Trends in Protective Relaying, Substation Automation, Testing and Related  

E-Print Network (OSTI)

by Power Systems Engineering Research Center (PSerc). Project No: T-39. Y. Dong and M. Kezunovic are with the Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843- 3128, USA affect system reliability; and 3) monitoring technologies presently exist within substations. Three steps

Kezunovic, Mladen

419

Lessons Learned from Substation Predictive Maintenance Project TC Project #7014  

Science Conference Proceedings (OSTI)

A tailored collaboration conducted between 1993 and 1998 by EPRI and ten participating utilities aimed at optimizing substation performance through predictive maintenance. This report summarizes the lessons learned from the project; a more comprehensive report will be published after further research.

1998-12-19T23:59:59.000Z

420

Substation siting and capacity selection based on diversity maximization  

SciTech Connect

A new substation siting and sizing method is described in which load diversity among different areas of the system is used as a factor in the analysis. An optimization procedure based on this concept is described. Tests show that the method can often provide improved results.

Willis, H.L.; Tram, H.N.; Powell, R.W.

1987-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Grounding Analysis in Heterogeneous Soil Models: Application to Underground Substations  

Science Conference Proceedings (OSTI)

Most of the research and development work done until now in earthing analysis is devoted to cases where the soil can be modelled in terms of an homogeneous and isotropic semi-infinite continuous medium, being the soil resistivity an order of magnitude ... Keywords: grounding analysis, earthing analysis, underground substations

Ignasi Colominas; Jose Paris; Xesus Nogueira; Fermin Navarrina; Manuel Casteleiro

2012-05-01T23:59:59.000Z

422

Recommended practice for fire protection for electric generating plants and high voltage direct current converter stations. 2005 ed.  

Science Conference Proceedings (OSTI)

The standard outlines fire safety recommendations for gas, oil, coal, and alternative fuel electric generating plants including high voltage direct current converter stations and combustion turbine units greater than 7500 hp used for electric generation. Provisions apply to both new and existing plants. The document provides fire prevention and fire protection recommendations for the: safety of construction and operating personnel; physical integrity of plant components; and continuity of plant operations. The 2005 edition includes revisions and new art that clarify existing provisions. 5 annexes.

NONE

2005-07-01T23:59:59.000Z

423

Experimental investigation of dielectric barrier discharge plasma actuators driven by repetitive high-voltage nanosecond pulses with dc or low frequency sinusoidal bias  

Science Conference Proceedings (OSTI)

Experimental studies were conducted of a flow induced in an initially quiescent room air by a single asymmetric dielectric barrier discharge driven by voltage waveforms consisting of repetitive nanosecond high-voltage pulses superimposed on dc or alternating sinusoidal or square-wave bias voltage. To characterize the pulses and to optimize their matching to the plasma, a numerical code for short pulse calculations with an arbitrary impedance load was developed. A new approach for nonintrusive diagnostics of plasma actuator induced flows in quiescent gas was proposed, consisting of three elements coupled together: the schlieren technique, burst mode of plasma actuator operation, and two-dimensional numerical fluid modeling. The force and heating rate calculated by a plasma model was used as an input to two-dimensional viscous flow solver to predict the time-dependent dielectric barrier discharge induced flow field. This approach allowed us to restore the entire two-dimensional unsteady plasma induced flow pattern as well as characteristics of the plasma induced force. Both the experiments and computations showed the same vortex flow structures induced by the actuator. Parametric studies of the vortices at different bias voltages, pulse polarities, peak pulse voltages, and pulse repetition rates were conducted experimentally. The significance of charge buildup on the dielectric surface was demonstrated. The charge buildup decreases the effective electric field in the plasma and reduces the plasma actuator performance. The accumulated surface charge can be removed by switching the bias polarity, which leads to a newly proposed voltage waveform consisting of high-voltage nanosecond repetitive pulses superimposed on a high-voltage low frequency sinusoidal voltage. Advantages of the new voltage waveform were demonstrated experimentally.

Opaits, Dmitry F.; Likhanskii, Alexandre V.; Neretti, Gabriele; Zaidi, Sohail; Shneider, Mikhail N.; Miles, Richard B. [Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544 (United States); Macheret, Sergey O. [Lockheed Martin Aeronautics Company, Palmdale, California 93599 (United States)

2008-08-15T23:59:59.000Z

424

Analog Integrated Circuits and Signal Processing, 42, 231–238, 2005 c ? 2005 Springer Science + Business Media, Inc. Manufactured in The Netherlands. Cascode Monolithic DC-DC Converter for Reliable Operation at High Input Voltages  

E-Print Network (OSTI)

Abstract. A cascode bridge circuit for monolithic switching DC-DC converters operating at high input voltages is proposed in this paper. The proposed circuit can also be used as an I/O buffer to interface circuits operating at significantly different voltages. The circuit technique permits the full integration of the active and passive devices of a switching DC-DC converter with a high voltage conversion ratio in a standard low voltage CMOS technology. The cascode bridge structure guarantees the reliable operation of deep submicrometer MOSFETs without exposure to high voltage stress while operating at high input and output voltages. With the proposed circuit technique, steady-state voltage differences between the terminals of all of the MOSFETs in a switching DC-DC converter are maintained within a range imposed by a target low voltage CMOS technology. High-to-low DC-DC converters operating at input voltages up to three times as high as the maximum voltage that can be directly applied across the terminals of a MOSFET are described. An efficiency of 79.6 % is achieved for 5.4 volts to 0.9 volts conversion assuming a 0.18 µm CMOS technology. The DC-DC converter operates at a switching frequency of 97 MHz while supplying a DC current of 250 mA to the load. Key Words: low voltage DC-DC converters, monolithic voltage regulators, low voltage CMOS technology, MOSFET reliability issues, high voltage stress 1.

Volkan Kursun; Siva G. Narendra; Vivek K. De; Eby G. Friedman

2004-01-01T23:59:59.000Z

425

Analysis of system wide distortion in an integrated power system utilizing a high voltage DC bus and silicon carbide power devices  

E-Print Network (OSTI)

This research investigates the distortion on the electrical distribution system for a high voltage DC Integrated Power System (IPS). The analysis was concentrated on the power supplied to a propulsion motor driven by an ...

Fallier, William F. (William Frederick)

2007-01-01T23:59:59.000Z

426

Improved Off-State Stress Critical Voltage on AlGaN/GaN High Electron Mobility Transistors Utilizing Pt/Ti/Au Based Gate Metallization  

Science Conference Proceedings (OSTI)

The critical voltage for degradation of AlGaN/GaN high electron mobility transistors (HEMTs) employed with the Pt/Ti/Au gate metallization instead of the commonly used Ni/Au was significantly increased during the off-state stress. The typical critical voltage for HEMTs with Ni/Au gate metallization was around -60V. By sharp contrast, no critical voltage was observed for the HEMTs with Pt/Ti/Au gate metallization, even up to -100V, which was the instrumental limitation in this experiment. Both Schottky forward and reverse gate characteristics of the Ni/Au degraded once the gate voltage passed the critical voltage of around -60V. There was no degradation exhibited for the HEMTs with Pt-gated HEMTs.

Lo, C. F. [University of Florida; Liu, L. [University of Florida, Gainesville; Kang, Tsung Sheng [University of Florida, Gainesville; Davies, Ryan [University of Florida; Gila, Brent P. [University of Florida, Gainesville; Pearton, S. J. [University of Florida; Kravchenko, Ivan I [ORNL; Laboutin, O. [Kopin Corporation, Taunton, MA; Cao, Yu [Kopin Corporation, Taunton, MA; Johnson, Wayne J. [Kopin Corporation, Taunton, MA; Ren, F. [University of Florida

2011-01-01T23:59:59.000Z

427

Differential voltage analyses of high-power lithium-ion cells 4. Cells containing NMC.  

DOE Green Energy (OSTI)

Cells with and without a LiC{sub 2}O{sub 4}BF{sub 2} electrolyte additive and that contained Li{sub 1.05}(Mn{sub 1/3}Co{sub 1/3}Ni{sub 1/3}){sub 0.95}O{sub 2} (NMC) positive electrodes were tested for calendar and cycle life at 60% state of charge. The temperatures used in these tests were 25 and 45 C (cycle life) and 45 and 55 C (calendar life). An analysis of the C/25 capacity data shows that the C/25 capacity decreases with the square root of time. The additive slowed down the rate of capacity decline. The C/25 data were subjected to differential voltage analysis to determine the possible cause of the capacity decrease and at which electrode the capacity decrease was occurring. Data from full cells and half-cells were compared to elucidate individual electrode contributions. This analysis indicated that lithium-capacity-consuming side reactions were occurring primarily at the negative electrode.

Bloom, I.; Walker, L. K.; Basco, J. K.; Abraham, D. P.; Christophersen, J. P.; Ho, C. D.; Chemical Sciences and Engineering Division; INL

2010-02-01T23:59:59.000Z

428

New fault locating system for air-insulated substations using optical current detector  

Science Conference Proceedings (OSTI)

This paper deals with a newly developed fault locating system. This fault locating system helps to shorten the time required for restoration of service after the occurrence of a busbar fault in an air-insulated distribution substation. Recent optical and electronic technologies allow highly accurate and compact fault locating system, which consists of optical current detectors using Faraday effect and a fault locating processor employing digital data processing technique. The fault location is made by discriminating the direction of zero-sequence currents. Through various tests and field operations it has been confirmed that the system has sufficient performance for practical application.

Yoshida, Y.; Kawazoe, S. (Kansai Electric Power Co., Inc., Osaka (Japan)); Ibuki, K.; Yamada, K.; Ochi, N. (Mitsubishi Electric Corp., Amagasaki, Hyogo (Japan). Itami Works)

1992-10-01T23:59:59.000Z

429

Abstract --The paper discusses issues related to integration of substation IED data. The approach to discussion is based on the  

E-Print Network (OSTI)

) is a Senior Consulting Engineer in the Substation Projects Division of the Substation Operations DepartmentAbstract -- The paper discusses issues related to integration of substation IED data. The approach to discussion is based on the purpose of integrating substation data and how the integrated data can be used

Kezunovic, Mladen

430

Demonstration of Commissioning Tests for Extra-High Voltage Cross-Linked Polyethylene Cable Systems at Los Angeles Department of Wat er and Power  

Science Conference Proceedings (OSTI)

Today, utilities are installing an increasing number of cross-linked polyethylene (XLPE) transmission cables with system voltages ranging from 115 kV up to 345 kV. This report summarizes field partial discharge measurements and high-voltage ac commissioning tests performed on a Los Angeles Department of Water and Power (LADWP) 230-kV XLPE transmission cable system. The commissioning tests were performed with a field transportable, variable frequency, series resonant test set at 1.4 times rated voltage.

2002-09-11T23:59:59.000Z

431

A Tracker for the Mu3e Experiment based on High-Voltage Monolithic Active Pixel Sensors  

E-Print Network (OSTI)

The Mu3e experiment searches for the lepton flavour violating decay mu+ -> e+e-e+, aiming for a branching fraction sensitivity of 10^-16. This requires an excellent momentum resolution for low energy electrons, high rate capability and a large acceptance. In order to minimize multiple scattering, the amount of material has to be as small as possible. These challenges can be met with a tracker built from high-voltage monolithic active pixel sensors (HV-MAPS), which can be thinned to 50 um and which incorporate the complete read-out electronics on the sensor chip. To further minimise material, the sensors are supported by a mechanical structure built from 25 um thick Kapton foil and cooled with gaseous helium.

Berger, Niklaus; Bachmann, Sebastian; Kiehn, Moritz; Peri?, Ivan; Perrevoort, Ann-Kathrin; Philipp, Raphael; Schöning, André; Stumpf, Kevin; Wiedner, Dirk; Windelband, Bernd; Zimmermann, Marco

2013-01-01T23:59:59.000Z

432

A Tracker for the Mu3e Experiment based on High-Voltage Monolithic Active Pixel Sensors  

E-Print Network (OSTI)

The Mu3e experiment searches for the lepton flavour violating decay mu+ -> e+e-e+, aiming for a branching fraction sensitivity of 10^-16. This requires an excellent momentum resolution for low energy electrons, high rate capability and a large acceptance. In order to minimize multiple scattering, the amount of material has to be as small as possible. These challenges can be met with a tracker built from high-voltage monolithic active pixel sensors (HV-MAPS), which can be thinned to 50 um and which incorporate the complete read-out electronics on the sensor chip. To further minimise material, the sensors are supported by a mechanical structure built from 25 um thick Kapton foil and cooled with gaseous helium.

Niklaus Berger; Heiko Augustin; Sebastian Bachmann; Moritz Kiehn; Ivan Peri?; Ann-Kathrin Perrevoort; Raphael Philipp; André Schöning; Kevin Stumpf; Dirk Wiedner; Bernd Windelband; Marco Zimmermann

2013-09-30T23:59:59.000Z

433

Fragmentation of Thin Wires under High Voltage Pulses and Bipolar Fusion  

Science Conference Proceedings (OSTI)

In this article we present an alternative explanation of the phenomenon of wire fragmentation under high transient currents based on classical electromagnetism. We also explain how this phenomenon can be utilized as a primitive example of low energy-high power disruptive phenomena that can affect even nuclear matter.

Papageorgiou, C. D. [Dept. of Electrical and Electronic Engineering, National Technical University of Athens (Greece); Raptis, T. E. [Division of Applied Technologies, National Centre for Science and Research 'Demokritos', Patriarchou Grigoriou and Neapoleos, Athens (Greece)

2010-01-21T23:59:59.000Z

434

Surge voltage suppression in residential power circuits  

Science Conference Proceedings (OSTI)

... Tran- sients in Low Voltage Supply Systems,'' The ... a high-voltage transformer for an oil furnace ... of service entrance SPD of 1960-1970 vintage were ...

2013-05-17T23:59:59.000Z

435

Categorical Exclusion for Pinnacle Peak Substation PCB contaminated Electrical  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Categorical Exclusion for Pinnacle Peak Substation PCB contaminated Electrical Equipment Removal Project located north of Phoenix, Maricopa County, Arizona RECORD OF CATEGORICAL EXCLUSION DETERMINATION A. Proposed Action: Western proposes drain and dispose of PCB contaminated oil from two bushings, and decontaminate one· bushing and rack, break apart PCB contaminated concrete and excavate PCB contaminated soil at Pinnacle Peak Substation. Western will be use existing access roads and vehicles such as cranes, backhoes, dozers, bucket trucks, crew trucks and pickup trucks to bring personnel and equipment to the work area. This work is necessary to maintain the safety and reliability of the bulk electrical system. The project is located in Maricopa County, Arizona. The attached map shows the

436

Microsoft Word - CX-Santiam_Substation_Renovation_WEB.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

KEPR-4 KEPR-4 SUBJECT: Environmental Clearance Memorandum Noah Carlson Project Manager - NWM-4 Proposed Action: Removal of asbestos and renovation of Santiam Substation PP&A Project No.: PP&A-1566 Budget Information: Work Order # 244751 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.16 Removal of asbestos from buildings Location: Santiam substation in Linn County, Oregon Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: This project entails the removal of all paint from all interior wall surfaces down to bare concrete as well as the removal of the suspended ceiling (painted with the same asbestos containing paint) and lighting systems. The asbestos containing floor tile will be removed as will the asbestos

437

Ground resistance of the foot in substation yards  

SciTech Connect

The ground resistance of the foot is affected by the limited depth of the gravel layer usually spread over the surface of the soil in substation yards.Equations and graphs given in IEEE Standard 80 to determine this ground resistance are not accurate and give conservative results. This paper presents more accurate equations and graphs for determining the ground resistance of the foot in a substation having a thin surface layer of gravel. Analysis has been made with two models of the foot. In one model the foot is represented by an equivalent circular plate and in the other by an equivalent rectangular plate. Results obtained with these two models and with the IEEE Standard 80 method have been compared.

Thapar, B.; Gerez, V.; Emmanuel, P. (Montana State Univ., Bozeman (United States))

1993-01-01T23:59:59.000Z

438

Minimize substation outage time by maximizing in-service testing  

Science Conference Proceedings (OSTI)

Most substation maintenance work is based on fixed schedules rather than on known need. Scheduled maintenance is essential and cannot be eliminated entirely, but priority should be given to equipment known to be deteriorated or defective. It makes no sense to perform costly, scheduled outage maintenance work when other equipment is failing because of undetected defects. The following should be included as major elements in an energized testing program: visual inspections; infrared inspection; corona inspection; percent oxygen in gas samples drawn from nitrogen-blanketed transformers; percent total combustible gas in gas samples drawn from nitrogen-blanketed transformers; dissolved gas analysis; oil quality tests; free water in the sample; dissolved water in oil; dissolved metals-in-oil analysis; furfural concentration analysis; SF[sub 6] analysis; battery testing; the substation grounding grid; and protective relays. 4 figs.

Lautenschlager, M. (High Voltage Maintenance Corp., Indianapolis, IN (United States))

1994-05-01T23:59:59.000Z

439

Sacramento Area Voltage Support Draft Environmental Impact Statement  

Science Conference Proceedings (OSTI)

The Western Area Power Administration's Central Valley Project transmission system forms an integral part of the interconnected Sacramento area transmission grid. Western is contractually responsible to oversee that the system is operated in accordance with strict reliability standards. Growth in the greater Sacramento, California area and power imported from generation outside the region, have increased the demand on the interconnected electric transmission system, leading to transmission system overloads and reducing the reliability and security of the area power system. Western has prepared this Sacramento Area Voltage Support (SVS) Draft Environmental Impact Statement (EIS) in compliance with Federal laws, regulations and guidelines, principally the ''National Environmental Policy Act'' (NEPA). This Draft EIS evaluates the potential environmental effects of physical improvements to the area's power system. Enhancements are needed to improve system reliability and provide voltage support for the Sacramento area. The results of public scoping meetings, workshops, meetings with agencies, and earlier studies by Western and area utilities helped to develop a range of alternatives for analysis. The Proposed Action involves: Constructing a new double-circuit, 230-kV transmission line paralleling the existing double-circuit, 230-kV line from the O'Banion Substation to the Elverta Substation; Realigning a portion of the existing Cottonwood-Roseville single-circuit, 230-kV transmission line north of Elverta Substation; and Reconductoring the existing double-circuit, 230-kV transmission line from the Elverta Substation to the Tracy Substation. Public Hearings on the Draft EIS will be held between December 9-12, 2002. Comments on this Draft EIS are encouraged and should be sent to Ms. Loreen McMahon (above). Comments must be received by December 30, 2002.

N /A

2002-11-15T23:59:59.000Z

440

Sacramento Area Voltage Support Final Environmental Impact Statement  

Science Conference Proceedings (OSTI)

The Western Area Power Administration's Central Valley Project transmission system forms an integral part of the interconnected Sacramento area transmission grid. Western is contractually responsible to oversee that the system is operated in accordance with strict reliability standards. Growth in the greater Sacramento, California area and power imported from generation outside the region, have increased the demand on the interconnected electric transmission system, leading to transmission system overloads and reducing the reliability and security of the area power system. Western has prepared this Sacramento Area Voltage Support (SVS) Draft Environmental Impact Statement (EIS) in compliance with Federal laws, regulations and guidelines, principally the National Environmental Policy Act (NEPA). This Draft EIS evaluates the potential environmental effects of physical improvements to the area's power system. Enhancements are needed to improve system reliability and provide voltage support for the Sacramento area. The results of public scoping meetings, workshops, meetings with agencies, and earlier studies by Western and area utilities helped to develop a range of alternatives for analysis. The Proposed Action involves: (1) Constructing a new double-circuit, 230-kV transmission line paralleling the existing double-circuit, 230-kV line from the O'Banion Substation to the Elverta Substation; (2) Realigning a portion of the existing Cottonwood-Roseville single-circuit, 230-kV transmission line north of Elverta Substation; and (3) Reconductoring the existing double-circuit, 230-kV transmission line from the Elverta Substation to the Tracy Substation. Public Hearings on the Draft EIS will be held between December 9-12, 2002. Comments on this Draft EIS are encouraged and should be sent to Ms. Loreen McMahon (above). Comments must be received by December 30, 2002.

N /A

2003-09-19T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Distribution substation load impacts of residential air conditioner load control  

SciTech Connect

An ongoing experiment to monitor the substation level load impacts of end-use load control is described. An overview of the data acquisition system, experimental procedures and analysis techniques are provided. Results of the 1983 and 1984 experiments demonstrate the value of aggregate load impact monitoring as a means of verifying load research results, calculating the diversity of end-use loads, and predicting the impacts of load management on the transmission and distribution systems.

Heffner, G.C.; Kaufman, D.A.

1985-07-01T23:59:59.000Z

442

Electric Field Modeling of Polymer Insulators in Substations  

Science Conference Proceedings (OSTI)

The use of transmission line suspension class polymer insulators is increasing for a wide range of reasons including lower cost, availability, their lightweight nature, and contamination performance. The expected use of these polymer insulators is on transmission lines; thus this is the application for which manufacturers design and test the recommended corona rings. Numerous suspension polymer insulators are being applied in substations in configurations which have different geometries to the transmissi...

2005-11-23T23:59:59.000Z

443

BRIEFINGS ON PHYSICAL SECURITY OF ELECTRICITY SUBSTATIONS – NEW YORK, NY  

Energy.gov (U.S. Department of Energy (DOE))

The Department of Energy (DOE) and Department of Homeland Security (DHS), in coordination with the Federal Bureau of Investigation, the Federal Energy Regulatory Commission's Office of Energy Infrastructure Security, the Electricity Sector Information Sharing and Analysis Center (ES-ISAC), North American Electricity Reliability Corporation (NERC), and industry experts, will conduct a series of briefings across the country with electricity sector owners and operators, and local law enforcement on the physical security of electricity substations.

444

BRIEFINGS ON PHYSICAL SECURITY OF ELECTRICITY SUBSTATIONS – BOSTON, MA  

Energy.gov (U.S. Department of Energy (DOE))

The Department of Energy (DOE) and Department of Homeland Security (DHS), in coordination with the Federal Bureau of Investigation, the Federal Energy Regulatory Commission's Office of Energy Infrastructure Security, the Electricity Sector Information Sharing and Analysis Center (ES-ISAC), North American Electricity Reliability Corporation (NERC), and industry experts, will conduct a series of briefings across the country with electricity sector owners and operators, and local law enforcement on the physical security of electricity substations.

445

BRIEFINGS ON PHYSICAL SECURITY OF ELECTRICITY SUBSTATIONS – DENVER, CO  

Energy.gov (U.S. Department of Energy (DOE))

The Department of Energy (DOE) and Department of Homeland Security (DHS), in coordination with the Federal Bureau of Investigation, the Federal Energy Regulatory Commission's Office of Energy Infrastructure Security, the Electricity Sector Information Sharing and Analysis Center (ES-ISAC), North American Electricity Reliability Corporation (NERC), and industry experts, will conduct a series of briefings across the country with electricity sector owners and operators, and local law enforcement on the physical security of electricity substations.

446

BRIEFINGS ON PHYSICAL SECURITY OF ELECTRICITY SUBSTATIONS – HOUSTON, TX  

Energy.gov (U.S. Department of Energy (DOE))

The Department of Energy (DOE) and Department of Homeland Security (DHS), in coordination with the Federal Bureau of Investigation, the Federal Energy Regulatory Commission's Office of Energy Infrastructure Security, the Electricity Sector Information Sharing and Analysis Center (ES-ISAC), North American Electricity Reliability Corporation (NERC), and industry experts, will conduct a series of briefings across the country with electricity sector owners and operators, and local law enforcement on the physical security of electricity substations.

447

BRIEFINGS ON PHYSICAL SECURITY OF ELECTRICITY SUBSTATIONS – TAMPA, FL  

Energy.gov (U.S. Department of Energy (DOE))

The Department of Energy (DOE) and Department of Homeland Security (DHS), in coordination with the Federal Bureau of Investigation, the Federal Energy Regulatory Commission's Office of Energy Infrastructure Security, the Electricity Sector Information Sharing and Analysis Center (ES-ISAC), North American Electricity Reliability Corporation (NERC), and industry experts, will conduct a series of briefings across the country with electricity sector owners and operators, and local law enforcement on the physical security of electricity substations.

448

BRIEFINGS ON PHYSICAL SECURITY OF ELECTRICITY SUBSTATIONS – CHICAGO, IL  

Energy.gov (U.S. Department of Energy (DOE))

The Department of Energy (DOE) and Department of Homeland Security (DHS), in coordination with the Federal Bureau of Investigation, the Federal Energy Regulatory Commission's Office of Energy Infrastructure Security, the Electricity Sector Information Sharing and Analysis Center (ES-ISAC), North American Electricity Reliability Corporation (NERC), and industry experts, will conduct a series of briefings across the country with electricity sector owners and operators, and local law enforcement on the physical security of electricity substations.

449

Draft Supplement to the Environmental Statement Fiscal Year 1976 Proposed Program : Facility Location Evaluation for Pleasant Prairie Service (Bigelow Substation) Study Area 75-8.  

SciTech Connect

The proposed plan of service consists of the construction of a new substation near Millwood, Washington. Land requirements for the new substation would be approximately 3 to 5 acres of land depending on the final site location chosen, and approximately 100 to 500 feet of access road would also be needed. The above requirements would remove 3 to 5 acres of land from agricultural production. Disturbance to wildlife during construction would occur and habitat associated with the above agricultural land would be eliminated. Grading requirements for the substation site and access road would result in slight erosion and sedimentation for alternate site 1 and high levels of erosion for alternate site 2. The proposed facility would be visible from a local road and several residences. Noise and other disturbances to residents will occur during construction.

United States. Bonneville Power Administration.

1974-10-22T23:59:59.000Z

450

Substation based data interpretation techniques for improved power system management  

Science Conference Proceedings (OSTI)

There is now considerable pressure on electric utilities to operate their systems in the most efficient manner possible and to provide increased quality of service to customers. This pressure, coupled with the decreasing availability of reserve margins dictates that there is a requirement for comprehensive system operation support through, among other things, the provision of quality information relating to the behavior of the primary and secondary systems. This paper will show how the data available within modern substation control and management systems can be exploited in a cost-effective manner, through the implementation of advanced substation functions in an open systems environment. Certain functions which are presently carried out at the control center could be distributed (or partially distributed) to the substation. These functions may provide the utility staff with quality information, which can in turn be used to satisfy the objectives of increasing quality and security of supply, in addition to optimizing the utility`s information, maintenance and asset management functions.

Booth, C.; McDonald, J.R. [Univ. of Strathclyde, Glasgow (United Kingdom). Centre for Electrical Power Engineering; Laycock, W.J.

1997-04-01T23:59:59.000Z

451

Design issues in low-voltage high-speed current-mode logic buffers  

Science Conference Proceedings (OSTI)

A current-mode logic (CML) buffer is based on a simple differential circuit. This paper investigates important problems involved in the design of a CML buffer as well as a chain of tapered CML buffers. A new design procedure to systematically design ... Keywords: VLSI, current-mode logic, high-speed, integrated circuit, noise

Payam Heydari

2003-04-01T23:59:59.000Z

452

Effect of trapping on the critical voltage for degradation in gan high electron mobility transistors  

E-Print Network (OSTI)

We have performed V[subscript DS] = 0 V and OFF-state step-stress experiments on GaN-on-Si and GaN-on-SiC high electron mobility transistors under UV illumination and in the dark. We have found that for both stress conditions, ...

Demirtas, Sefa

453

H20: New Ceramic-matrix Composite for Low Voltage High Energy ...  

Science Conference Proceedings (OSTI)

C19: Dissolution Behavior of Cu Under Bump Metallization in Ball Grid Array Structure ... E11: Evolution of the Grain Boundary Character Distribution During Grain ... for High Volume and Fast Turnaround Automated Inline TEM Sample Preparation .... H2: Triboluminescent Smart Sensors for Structural Health Monitoring.

454

Analysis and design of a high-current, high-voltage accurate power supply for the APS storage ring  

SciTech Connect

There are 81 dipole magnets contained in the storage ring at the Advanced Photon Source (APS). These magnets are connected in series and are energized by only one 12-phase power supply. The eighty-first magnet is located in a temperature-controlled room with an NMR probe to monitor the magnetic field in the magnet and provide a reference signal for correction of the field drift due to aging of the components. The current in the magnets will be held at 497 A. The required current stability of the power supply is {plus_minus}30 ppM, the current reproducibility is {plus_minus}50 ppM, and the current ripple is {plus_minus}400 ppM. The voltage required to maintain such a current in the magnets is about 1700 V. Different schemes for regulating current in the magnets are studied. Pspice software is used to simulate the behavior and the design of such a power supply under different conditions. The pros and cons of each scheme will be given and the proper power and regulating scheme will be selected.

Fathizadeh, M.

1993-08-01T23:59:59.000Z

455

Abstract--Many functions within a substation can be performed more efficiently if all the substation data is collected  

E-Print Network (OSTI)

components for the voltage is performed applying Fortescue transform. Two variables are defined: ratio

456

PRE-SW: Substation Condition Monitoring and Implementation Database Version 2.0  

Science Conference Proceedings (OSTI)

The Substation Sensor Database provides a searchable database of sensors available to substation engineers, categorized by Area, Component, Sub-Component, Parameter, and Technology.  By specifying each category, the list can be filtered to a sub-set of sensors.  By clicking on a sensor’s name, details can be viewed including a description, sensor maturity, and a link to the manufacturer. Through data-mining of this database substation engineers could work on the development of ...

2013-08-30T23:59:59.000Z

457

Effects of Distributed Energy Resources on Conservation Voltage Reduction (CVR)  

SciTech Connect

Conservation Voltage Reduction (CVR) is one of the cheapest technologies which can be intelligently leveraged to provide considerable energy savings. The addition of renewables in the form of distributed resources can affect the entire power system, but more importantly, affects the traditional substation control schemes at the distribution level. This paper looks at the effect on energy consumption, peak load reduction, and voltage profile changes due to the addition of distributed generation in a distribution feeder using combinations of volt var control. An IEEE 13-node system is used to simulate the various cases. Energy savings and peak load reduction for different simulation scenarios are compared.

Singh, Ruchi; Tuffner, Francis K.; Fuller, Jason C.; Schneider, Kevin P.

2011-10-10T23:59:59.000Z

458

Voltage Control Devices on the IEEE 8500 Node Test Feeder  

SciTech Connect

The IEEE Test Cases provide researchers with distribution system models that can be used to validate new analytic methods. The newest of these models is the 8500-node test feeder which contains multiple devices for voltage control. In addition to a substation regulator there are multiple inline regulators as well as capacitor banks. This paper will discuss the detail in which voltage control devises should be modeled when examining large distribution systems. This discussion will include issues associated with power flow analysis for a single time step as well as for time series analysis.

Schneider, Kevin P.; Fuller, Jason C.

2010-01-06T23:59:59.000Z

459

An Integrative Approach to Reliability Analysis of an IEC 61850 Digital Substation  

E-Print Network (OSTI)

In recent years, reliability evaluation of substation automation systems has received a significant attention from the research community. With the advent of the concept of smart grid, there is a growing trend to integrate more computation and communication technology into power systems. This thesis focuses on the reliability evaluation of modern substation automation systems. Such systems include both physical devices (current carrying) such as lines, circuit breakers, and transformers, as well as cyber devices (Ethernet switches, intelligent electronic devices, and cables) and belong to a broader class of cyber-physical systems. We assume that the substation utilizes IEC 61850 standard, which is a dominant standard for substation automation. Focusing on IEC 61850 standard, we discuss the failure modes and analyze their effects on the system. We utilize reliability block diagrams for analyzing the reliability of substation components (bay units) and then use the state space approach to study the effects at the substation level. Case study is based on an actual IEC 61850 substation automation system, with different network topologies consideration concluded. Our analysis provides a starting point for evaluating the reliability of the substation and the effects of substation failures to the rest of the power system. By using the state space methods, the steady state probability of each failure effects were calculated in different bay units. These probabilities can be further used in the modeling of the composite power system to analyze the loss of load probabilities.

Zhang, Yan 1988-

2012-12-01T23:59:59.000Z

460

? Adjustable Output Voltage  

E-Print Network (OSTI)

The LM25010 features all the functions needed to implement a low cost, efficient, buck regulator capable of supplying in excess of 1A load current. This high voltage regulator integrates an N-Channel Buck Switch, and is available in thermally enhanced LLP-10 and TSSOP-14EP packages. The constant on-time regulation scheme requires no loop compensation resulting in fast load transient response and simplified circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit detection is set at 1.25A. Additional features include: VCC under-voltage lock-out, thermal shutdown, gate drive under-voltage lock-out, and maximum duty cycle limiter.

Lmq Is Aec-q Grade

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "high voltage substation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Power-installed streetlight foundations lower substation construction costs  

SciTech Connect

The Alabama Power Company's power-installed streetlight foundation (SLF) saves 85% of labor costs and is practical as well as economical. After several foundation designs were tried, the multi-helix proved best for swampy terrain. A test of substation structure support began with soil testing to locate any rock on the site. Standard tubular-steel structures with modified baseplates were used. A truck-mounted derrick proved better for installation than a drill rig. Slight corrosive currents are not expected to cause appreciable deterioration to the foundation. (DCK)

Beason, D.

1981-07-01T23:59:59.000Z

462

A simplified method for calculating the substation grounding grid resistance  

SciTech Connect

A simple and accurate formula for calculating the grounding grid resistance is proposed in this paper. This method is based on a theoretical manipulation of the numerical moment method and of the current image. The formula is dependent on the substation grounding grid design, such as grid depth, grid size, number of meshes, grid-conductor diameter, etc. A comparison study is performed to check the accuracy of the proposed formula with respect to six different formulas and methods in the literature. An excellent agreement was found between the results of this formula and the results of a sophisticated computerized method.

Chow, Y.L.; Salama, M.M.A. (Univ. of Waterloo, Ontario (Canada). Computer Engineering)

1994-04-01T23:59:59.000Z

463

Microsoft Word - CX-Covington_Substation_WEB.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8, 2010 8, 2010 REPLY TO ATTN OF: KEPR-4 SUBJECT: Environmental Clearance Memorandum Kerry Cook Project Manager - TELF-TPP-3 Proposed Action: Perform research of groundwater drainage and flooding issues at Covington Complex through the installation of four groundwater monitoring wells PP&A Project No.: PP&A-1772 Budget Information: Work Order #00246440 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B3.6 Siting/ construction/operation/decommissioning of facilities for bench-scale research, conventional laboratory operations, small-scale research and development and pilot projects. Location: Covington Substation in King County, Washington Proposed by: Bonneville Power Administration (BPA)

464

HIGH VOLTAGE ELECTRODES  

DOE Patents (OSTI)

S>This patent relates to electrode structure for creating an intense direct current electric field which may have a field strength of the order of two to three times that heretofore obtained, with automatic suppression of arcing. The positive electrode is a conventional conductive material such as copper while the negative electrode is made from a special material having a resistivity greater than that of good conductors and less than that of good insulators. When an incipient arc occurs, the moderate resistivity of the negative electrode causes a momentary, localized decrease in the electric field intensity, thus suppressing the flow of electrons and avoiding arcing. Heated glass may be utilized for the negative electrode, since it provides the desired combination of resistivity, capacity, dielectric strength, mechani-cal strength, and thermal stability. (AEC)

Murray, J.J.

1963-04-23T23:59:59.000Z

465

Transient and harmonic voltages associated with automated capacitor switching on distribution systems  

SciTech Connect

One of the functions proposed for distribution automation systems is automated capacitor switching to control power factor and voltage profile on feeder circuits. This is one of the functions being implemented as part of the Athens Automation and Control Experiment on the Athens Utilities Board (AUB) in Athens, Tennessee. A concern with automated capacitor switching is the increase in harmonic and transient voltages due to different capacitor configurations on the distribution system. A study was performed to evaluate the impact of the automated capacitor switching on the AUB distribution system. The study has identified problem areas, methods for determining the problem areas, and possible solutions. The substation capacitor banks were found to be the dominant factor in both the transient and harmonic responses of the distribution system. The harmonic response of the system is dominated by the parallel inductance/capacitance of the circuit comprised of the substation capacitor and equivalent source reactance at the substation. The transient analyses indicated that when the substation capacitor is energized, magnified transient voltages can occur at switched-in feeder capacitors. An evaluation of the effect of automated capacitor switching is necessary to properly design the automated capacitor switching schemes and the required arrester protection for any harmonic and/or transient overvoltage contingency.

Rizy, D.T.; Gunther, E.W.; Mc Granaghan, M.F.

1987-08-01T23:59:59.000Z

466

Transient and harmonic voltages associated with automated capacitor switching on distribution systems  

SciTech Connect

One of the functions proposed for distribution system automation is automated capacitor switching to control power factor and voltage profile on feeder circuits. This is one of the functions being implemented as part of the Athens Automation and Control Experiment on the Athens Utilities Board (AUB) in Athens, Tennessee. A concern with automated capacitor switching is the increase in harmonic and transient voltages due to different capacitor configurations on the distribution system. A study was performed to evaluate the impact of the automated capacitor switching on the AUB distribution system. The study has identified problem areas, methods for determining the problem areas and possible solutions. The substation capacitor banks were found to be the dominant factor in both the transient and harmonic responses of the distribution system. The harmonic response of the system is dominated by the parallel inductance/capacitance of the circuit comprised of the substation capacitor and equivent source reactance at the substation. The transient analyses found that when the substation capacitor is energized, magnified transient voltages can occur at switched in feeder capacitors. An evaluation of the effect of automated capacitor switching is necessary to properly design tha automated capacitor switching schemes and the required arrester protection for any harmonic and/or transient overvoltage contingency.

Rizy, D.T.; Gunther, E.W.; McGranaghan, M.F.

1986-01-01T23:59:59.000Z

467

An in depth examination of semi floating gate ultra low voltage flip-flops for high speed applications.  

E-Print Network (OSTI)

??In this thesis 4 different ultra low voltage (ULV) flip-flops are presented. Floating gates has been exploited to significantly increase the drain-source current. This technique… (more)

Simenstad, Erik Jonathan

2013-01-01T23:59:59.000Z

468

Design Techniques for High Speed Low Voltage and Low Power Non-Calibrated Pipeline Analog to Digital Converters  

E-Print Network (OSTI)

The profound digitization of modern microelectronic modules made Analog-to- Digital converters (ADC) key components in many systems. With resolutions up to 14bits and sampling rates in the 100s of MHz, the pipeline ADC is a prime candidate for a wide range of applications such as instrumentation, communications and consumer electronics. However, while past work focused on enhancing the performance of the pipeline ADC from an architectural standpoint, little has been done to individually address its fundamental building blocks. This work aims to achieve the latter by proposing design techniques to improve the performance of these blocks with minimal power consumption in low voltage environments, such that collectively high performance is achieved in the pipeline ADC. Towards this goal, a Recycling Folded Cascode (RFC) amplifier is proposed as an enhancement to the general performance of the conventional folded cascode. Tested in Taiwan Semiconductor Manufacturing Company (TSMC) 0.18?m Complementary Metal Oxide Semiconductor (CMOS) technology, the RFC provides twice the bandwidth, 8-10dB additional gain, more than twice the slew rate and improved noise performance over the conventional folded cascode-all at no additional power or silicon area. The direct auto-zeroing offset cancellation scheme is optimized for low voltage environments using a dual level common mode feedback (CMFB) circuit, and amplifier differential offsets up to 50mV are effectively cancelled. Together with the RFC, the dual level CMFB was used to implement a sample and hold amplifier driving a singleended load of 1.4pF and using only 2.6mA; at 200MS/s better than 9bit linearity is achieved. Finally a power conscious technique is proposed to reduce the kickback noise of dynamic comparators without resorting to the use of pre-amplifiers. When all techniques are collectively used to implement a 1Vpp 10bit 160MS/s pipeline ADC in Semiconductor Manufacturing International Corporation (SMIC) 0.18[mu]m CMOS, 9.2 effective number of bits (ENOB) is achieved with a near Nyquist-rate full scale signal. The ADC uses an area of 1.1mm2 and consumes 42mW in its analog core. Compared to recent state-of-the-art implementations in the 100-200MS/s range, the presented pipeline ADC uses the least power per conversion rated at 0.45pJ/conversion-step.

Assaad, Rida Shawky

2009-12-01T23:59:59.000Z

469

A High-Pressure Hydrogen Storage Design for Substation Applications  

Low-cost off-board bulk stationary storage of hydrogen is a critical part in the hydrogen infrastructure, ... recognized in the DOE Fuel Cell Technologies Program ...

470

High-Order Terms in the Asymptotic Expansions of the Steady-State Voltage Potentials in the Presence of Conductivity Inhomogeneities of Small Diameter  

E-Print Network (OSTI)

We derive high-order terms in the asymptotic expansions of the steady-state voltage potentials in the presence of a finite number of diametrically small inhomogeneities with conductivities different from the background conductivity. Our derivation is rigorous, and based on layer potential techniques. The asymptotic expansions in this paper are valid for inhomogeneities with Lipschitz boundaries and those with extreme conductivities.

Habib Ammari; Hyeonbae Kang

2001-12-12T23:59:59.000Z

471

A new measurement technique for tracking voltage phasors, local system frequency, and rate of change of frequency  

Science Conference Proceedings (OSTI)

With the advent of Substation Computer Systems dedicated to protection, control and data logging functions in a Substation, it becomes possible to develop new applications which can utilize the processing power available within the substation. The microcomputer based Symmetrical Component Distance Relay (SCDR) described in the references cited at the end of this paper possesses certain characteristics which facilitate real-time monitoring of positive sequence voltage phasor at the local power system bus. With a regression analysis the frequency and rate-of-change of frequency at the bus can also be determined from the positive sequence voltage phase angle. This paper describes the theoretical basis of these computations and describes results of experiments performed in the AEP power system simulation laboratory. Plans for future field tests on the AEP system are also outlined.

Phadke, A.G.; Adamiak, M.G.; Thorp, J.S.

1983-05-01T23:59:59.000Z

472

Low-voltage gyrotrons  

SciTech Connect

For a long time, the gyrotrons were primarily developed for electron cyclotron heating and current drive of plasmas in controlled fusion reactors where a multi-megawatt, quasi-continuous millimeter-wave power is required. In addition to this important application, there are other applications (and their number increases with time) which do not require a very high power level, but such issues as the ability to operate at low voltages and have compact devices are very important. For example, gyrotrons are of interest for a dynamic nuclear polarization, which improves the sensitivity of the nuclear magnetic resonance spectroscopy. In this paper, some issues important for operation of gyrotrons driven by low-voltage electron beams are analyzed. An emphasis is made on the efficiency of low-voltage gyrotron operation at the fundamental and higher cyclotron harmonics. These efficiencies calculated with the account for ohmic losses were, first, determined in the framework of the generalized gyrotron theory based on the cold-cavity approximation. Then, more accurate, self-consistent calculations for the fundamental and second harmonic low-voltage sub-THz gyrotron designs were carried out. Results of these calculations are presented and discussed. It is shown that operation of the fundamental and second harmonic gyrotrons with noticeable efficiencies is possible even at voltages as low as 5-10 kV. Even the third harmonic gyrotrons can operate at voltages about 15 kV, albeit with rather low efficiency (1%-2% in the submillimeter wavelength region).

Glyavin, M. Yu.; Zavolskiy, N. A.; Sedov, A. S. [Institute of Applied Physics RAS, N. Novgorod 603600 (Russian Federation); Nusinovich, G. S. [IREAP, University of Maryland, College Park, Maryland 20742-3511 (United States)

2013-03-15T23:59:59.000Z

473

Paraconsistent Case-Based Reasoning Applied to a Restoration of Electrical Power Substations  

Science Conference Proceedings (OSTI)

This paper presents a connection of two techniques applied in Artificial Intelligence to solve problems of restoration of electrical power substations. The techniques are: Case-based Reasoning --- CBR and the Four-Valued Annotated Paraconsistent Logic ... Keywords: CBR, Case-based Reasoning, Decision Support System, Intelligent System, Paraconsistent Logic, Restoration of Electrical Power Substations

Helga Gonzaga Martins; Germano Lambert-Torres; Luiz Eduardo Borges Da Silva; Claudio Inácio Almeida Costa; Maurilio Pereira Coutinho

2008-10-01T23:59:59.000Z

474

Special design and testing aspects of the 345 kV East Fishkill substation  

SciTech Connect

The installation of two 135 MVAR capacitor banks in the 345 kV East Fishkill substation required special design of the grounding system, installation of reactors in series with the capacitor banks, closing resistors in the circuit breakers and special shielding of control cables. This paper describes the design of the substation and the tests performed before commissioning the capacitor banks.

Fogarty, R.P.; Halleran, T.M.; Laskowski, L.M.; Mark, D.A. (Consolidated Edison Co. of New York, Inc., New York, NY (United States))

1992-10-01T23:59:59.000Z