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Note: This page contains sample records for the topic "ac power voltage" 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.


1

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

2

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.

Droege, Thomas F. (Batavia, IL)

1989-01-01T23:59:59.000Z

3

Voltage, energy and power in electric circuits  

E-Print Network [OSTI]

Voltage, energy and power in electric circuits Science teaching unit #12;Disclaimer The Department-2008DVD-EN Voltage, energy and power in electric circuits #12;#12;© Crown copyright 2008 1The National Strategies | Secondary Voltage, energy and power in electric circuits 00094-2008DVD-EN Contents Voltage

Berzins, M.

4

E-Print Network 3.0 - ac voltage standard Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

"volts, AC"), the "secondary" voltage is roughly 6 VAC. We shall use the "Universal Transformer... :" conversion of AC to DC You can use a diode to convert the AC voltage of the...

5

The design of an A-C voltage regulator using a Wein Bridge detector  

E-Print Network [OSTI]

equipment, which in turn demands a mox'e closely regulated power supply. In satisfying these demands there have been many kinds of voltage regulators designed, constructed, and needs A voltage regulator oonsists essentially of two pax'ts, the "detectox...-V, 424-8, 470 3, 499-503 1950 4. Patchett, G. N. , "The Theory of Nonlinear Bridge Circuit Applied to Voltage Stabilizers, " J. I . E. E . , Vol. 93, Pt. III, p. 18 (1948). 5. Choudbury, J. K. t Das Gupta, S. C. , and Sen, P. C, , "An A-C Voltage...

Brown, Richard True

2012-06-07T23:59:59.000Z

6

Wind Power Plant Voltage Stability Evaluation: Preprint  

SciTech Connect (OSTI)

Voltage stability refers to the ability of a power system to maintain steady voltages at all buses in the system after being subjected to a disturbance from a given initial operating condition. Voltage stability depends on a power system's ability to maintain and/or restore equilibrium between load demand and supply. Instability that may result occurs in the form of a progressive fall or rise of voltages of some buses. Possible outcomes of voltage instability are the loss of load in an area or tripped transmission lines and other elements by their protective systems, which may lead to cascading outages. The loss of synchronism of some generators may result from these outages or from operating conditions that violate a synchronous generator's field current limit, or in the case of variable speed wind turbine generator, the current limits of power switches. This paper investigates the impact of wind power plants on power system voltage stability by using synchrophasor measurements.

Muljadi, E.; Zhang, Y. C.

2014-09-01T23:59:59.000Z

7

Self-Excited ac High Voltage Generation Using Water Droplets  

Science Journals Connector (OSTI)

By letting water drops fall through rings into cans high voltage can be spontaneously generated with no external electrical excitation. Previous work concerning this type of electric influence machine for dc and three-phase ac high voltage generation is extended to include multiphase multifrequency operation by considering N streams and N cans. A distributed equivalent circuit representation is used to calculate the natural frequencies of the system where it is found that many overstable modes are present. Experimental observations with up to five cans are presented. This device can serve as a model for phenomena concerned with atmospheric electricity.

Markus Zahn

1973-01-01T23:59:59.000Z

8

Optimal Voltage Control of the Southern Norwegian Power Grid.  

E-Print Network [OSTI]

??This thesis contains the synthesis, analysis and simulation results of an automatic optimal voltage controller for the Southern Norwegian power grid. Currently the high voltage… (more)

Hannisdal, Erik Lundegaard

2011-01-01T23:59:59.000Z

9

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

10

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)

2010-05-04T23:59:59.000Z

11

A new high performance AC to DC rectifier with input power factor correction and harmonic reduction capacity  

E-Print Network [OSTI]

Many conventional switching power supplies in data processing equipment and low power motor drive systems operate by rectifying the input ac line voltage and filtering it with large electrolytic capacitors. Because this process involves both...

Martinez, Roberto

2012-06-07T23:59:59.000Z

12

780 IEEE Transactions on Power Apparatus and Systems, Vol. PAS-98, No. 3 May/June 1979 PREDICTION METHOD FOR BURIED PIPELINE VOLTAGES  

E-Print Network [OSTI]

METHOD FOR BURIED PIPELINE VOLTAGES DUE TO 60 Hz AC INDUCTIVE COUPLING PART I - ANALYSIS Allen Taflove 60616 Abstract - The voltages induced on gas transmis- sion pipelines by 60 Hz ac power transmission equivalent circuits for pipeline sections are developed which allow the decomposition of complex pipeline

Taflove, Allen

13

Princeton Plasma Physics Lab - AC power  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ac-power The electricity that runs the ac-power The electricity that runs the Laboratory's experiments and facilities. "AC" stands for the alternating current that comes from large power stations. The term compares with "DC," for "direct current," which comes from sources like batteries. en Offshore Wind and Vehicle to Grid Power http://www.pppl.gov/events/offshore-wind-and-vehicle-grid-power

Professor Willett Kempton, of the University of Delaware, presents "Offshore Wind and Vehicle to Grid Power" as part of the Andlinger Center's 2013-2014 Highlight Seminar Series.

14

Minimization of voltage deviation and power losses in power networks using Pareto optimization methods  

Science Journals Connector (OSTI)

Voltage regulation is an important task in electrical engineering for controlling node voltages in a power network. A widely used solution for the problem of voltage regulation is based on adjusting the taps in under load tap changers (ULTCs) power transformers ... Keywords: Multi-objective optimization, Power distribution network, Power losses, Under load tap changers, Voltage regulation

Francisco G. Montoya; Raúl Bańos; Consolación Gil; Antonio Espín; Alfredo Alcayde; Julio Gómez

2010-08-01T23:59:59.000Z

15

2428 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 23, NO. 5, SEPTEMBER 2008 A Modular Strategy for Control and Voltage  

E-Print Network [OSTI]

, voltage balancing. I. INTRODUCTION WITH THE advancement of power electronics and emer- gence of new.1109/TPEL.2008.2002055 The CHB converters can be used as inverters in ac motor drives, high power2428 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 23, NO. 5, SEPTEMBER 2008 A Modular Strategy

Paris-Sud XI, Université de

16

Voltage flicker prediction for two simultaneously operated ac arc furnaces  

SciTech Connect (OSTI)

An EMTP-based arc furnace model was developed for evaluation of flicker concerns associated with supplying a large integrated steel mill as they go from one to two furnace operation and as system changes are implemented that will affect the short circuit capacity at the 230 kV power supply substation. The model includes a dynamic arc representation which is designed to be characteristic of the initial portions of the melt cycle when the arc characteristics are the most variable (worst flicker conditions). The flicker calculations are verified using previous measurements with one furnace operation. Flicker simulations were then performed to evaluate a variety of different possible system strengths with both one and two furnaces in operation. The primary flicker measure used for this study is the unweighted rms value of the fluctuation envelope, expressed as a percentage of the rms line-to-ground voltage magnitude.

Tang, L. [ABB Power T and D Co., Inc., Raleigh, NC (United States)] [ABB Power T and D Co., Inc., Raleigh, NC (United States); Kolluri, S. [Entergy Services, New Orleans, LA (United States)] [Entergy Services, New Orleans, LA (United States); McGranaghan, M.F. [Electrotek Concepts, Inc., Knoxville, TN (United States)] [Electrotek Concepts, Inc., Knoxville, TN (United States)

1997-04-01T23:59:59.000Z

17

Centralized wind power plant voltage control with optimal power flow algorithm.  

E-Print Network [OSTI]

??This thesis presents a method of controlling the reactive power injected into a medium-voltage collection system by multiple wind turbine generators such that the voltage… (more)

Kline, Jared Andrew

2011-01-01T23:59:59.000Z

18

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

19

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

20

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

SciTech Connect (OSTI)

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

Note: This page contains sample records for the topic "ac power voltage" 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

A system for tranmitting low frequency analog signals over ac power lines  

DOE Patents [OSTI]

A system for transmitting low frequency analog signals over ac power lines using FM modulation. A low frequency analog signal to be transmitted is first applied to a voltage-to-frequency converter where it is converted to a signal whose frequency varies in proportion to the analog signal amplitude. This signal is then used to modulate the carrier frequency of an FM transmitter coupled to an ac power line. The modulation signal frequency range is selected to be within the response band of the FM transmitter. The FM modulated carrier signal is received by an FM receiver coupled to the ac power line, demodulated and the demodulated signal frequency is converted by a frequency-to-voltage converter back to the form of the original low frequency analog input signal. 4 figs.

Baker, S.P.; Durall, R.L.; Haynes, H.D.

1987-07-30T23:59:59.000Z

22

System for transmitting low frequency analog signals over AC power lines  

DOE Patents [OSTI]

A system for transmitting low frequency analog signals over AC power lines using FM modulation. A low frequency analog signal to be transmitted is first applied to a voltage-to-frequency converter where it is converted to a signal whose frequency varies in proportion to the analog signal amplitude. This signal is then used to modulate the carrier frequency of an FM transmitter coupled to an AC power line. The modulation signal frequency range in selected to be within the response band of the FM transmitter. The FM modulated carrier signal is received by an FM receiver coupled to the AC power line, demodulated and the demodulated signal frequency is converted by a frequency-to-voltage converter back to the form of the original low frequency analog input signal.

Baker, Steven P. (Powell, TN); Durall, Robert L. (Lenoir City, TN); Haynes, Howard D. (Knoxville, TN)

1989-01-01T23:59:59.000Z

23

Strongly nonlinear dynamics of electrolytes in large ac voltages Laurits Hjgaard Olesen,1,2  

E-Print Network [OSTI]

the results have been developed for over a century 1 . Current applications include energy storage; published 2 July 2010 We study the response of a model microelectrochemical cell to a large ac voltage of frequency comparable to the inverse cell relaxation time. To bring out the basic physics, we consider

24

VOLTAGE COLLAPSE AND TRANSIENT ENERGY FUNCTION ANALYSES OF AC/DC SYSTEMS  

E-Print Network [OSTI]

for power system dynamic models, including a third order representation of high voltage direct current (HVDC power limits, HVDC firing angle limits and voltage dependent current order limits (VDCOL) are shown the derivation of individual component Lyapunov functions for simplified models of HVDC links connected

Cañizares, Claudio A.

25

Power Grid Voltage Integrity Verification Department of ECE  

E-Print Network [OSTI]

Power Grid Voltage Integrity Verification Maha Nizam Department of ECE University of Toronto devgan@magma-da.com ABSTRACT Full-chip verification requires one to check if the power grid is safe, i of the circuit attached to the grid, thereby precluding early verification of the grid. We propose a power grid

Najm, Farid N.

26

Analysis on DFIG Wind Power System Low-Voltage Ridethrough  

Science Journals Connector (OSTI)

Due to the double fed induction generator’s (DFIG) advantage of controlling active and reactive power independently and partial power converter, DFIG is becoming a popular type of wind power generation system. Nowadays, the grid code demands that ... Keywords: VSCF, DFIG, LVRT, Crowbar, Voltage sags

Yulong Wang; Jianlin Li; Shuju Hu; Honghua Xu

2009-04-01T23:59:59.000Z

27

Living and Working Safely Around High-Voltage Power Lines.  

SciTech Connect (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

28

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

29

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

30

Safe-commutation principle for direct single-phase AC-AC converters for use in audio power  

E-Print Network [OSTI]

Safe-commutation principle for direct single-phase AC-AC converters for use in audio power-stage AC-AC audio power amplifiers. As compared with the bridge commutation with load current or source is certainly the audio power amplification. Switching-mode Class D audio power amplifiers are becoming

31

Voltage Regulation through Smart Utilization of Potential Reactive Power Resources  

Science Journals Connector (OSTI)

The introduction of demand response concept, in addition to increment of penetration of distributed generation (DG) based on renewable energies, make opportunities for the novel control schemes to be integrated in power system on a smart grid framework. ... Keywords: Demand response, distributed generation, reactive power, renewable energy, smart grid, voltage control

H. Kazari; A. Abbaspour-Tehrani Fard; A. S. Dobakhshari; A. M. Ranjbar

2011-11-01T23:59:59.000Z

32

Power and Voltage Smooth Control of Doubly Fed Induction Generator  

Science Journals Connector (OSTI)

Doubly-fed induction generator (DFIG) is the leading in wind power technology currently. In this paper, decoupling control of DFIG is studied and a new energy storage device is used in the smooth control of DFIG system's power and voltage. This new method ... Keywords: Doubly fed induction generator, Energy storage device, Decoupling control

An-Ren Ma; Cai-Xia Wang; Zhi-Wen Zhou; Tao Wu

2012-07-01T23:59:59.000Z

33

Princeton Power Systems (TRL 5 6 Component)- Marine High-Voltage Power Conditioning and Transmission System with Integrated Energy Storage  

Broader source: Energy.gov [DOE]

Princeton Power Systems (TRL 5 6 Component) - Marine High-Voltage Power Conditioning and Transmission System with Integrated Energy Storage

34

Voltage Regulator Chip: Power Supplies on a Chip  

SciTech Connect (OSTI)

ADEPT Project: CPES at Virginia Tech is finding ways to save real estate on a computer's motherboard that could be used for other critical functions. Every computer processor today contains a voltage regulator that automatically maintains a constant level of electricity entering the device. These regulators contain bulky components and take up about 30% of a computer's motherboard. CPES at Virginia Tech is developing a voltage regulator that uses semiconductors made of gallium nitride on silicon (GaN-on-Si) and high-frequency soft magnetic material. These materials are integrated on a small, 3D chip that can handle the same amount of power as traditional voltage regulators at 1/10 the size and with improved efficiency. The small size also frees up to 90% of the motherboard space occupied by current voltage regulators.

None

2010-09-01T23:59:59.000Z

35

Bi-directional power control system for voltage converter  

DOE Patents [OSTI]

A control system for a voltage converter includes: a power comparator for comparing a power signal on input terminals of the converter with a commanded power signal and producing a power comparison signal; a power regulator for transforming the power comparison signal to a commanded current signal; a current comparator for comparing the commanded current signal with a measured current signal on output terminals of the converter and producing a current comparison signal; a current regulator for transforming the current comparison signal to a pulse width modulator (PWM) duty cycle command signal; and a PWM for using the PWM duty cycle command signal to control electrical switches of the converter. The control system may further include: a command multiplier for converting a voltage signal across the output terminals of the converter to a gain signal having a value between zero (0) and unity (1), and a power multiplier for multiplying the commanded power signal by the gain signal to provide a limited commanded power signal, wherein power comparator compares the limited commanded power signal with the power signal on the input terminals.

Garrigan, Neil Richard (Niskayuna, NY); King, Robert Dean (Schenectady, NY); Schwartz, James Edward (Slingerlands, NY)

1999-01-01T23:59:59.000Z

36

Programmable AC power supply for simulating power transient expected in fusion reactor  

SciTech Connect (OSTI)

This paper focus on control engineering of the programmable AC power source which has capability to simulate power transient expected in fusion reactor. To generate the programmable power source, AC-AC power electronics converter is adopted to control the power of a set of heaters to represent the transient phenomena of heat exchangers or heat sources of a fusion reactor. The International Thermonuclear Experimental Reactor (ITER) plasma operation scenario is used as the basic reference for producing this transient power source. (authors)

Halimi, B. [Seoul National Univ., Seoul 151-744 (Korea, Republic of); Suh, K. Y. [Seoul National Univ., Seoul 151-744 (Korea, Republic of); PHILOSOPHIA, 1 Gwanak Ro, Gwanak Gu, Seoul 151-744 (Korea, Republic of)

2012-07-01T23:59:59.000Z

37

Intelligent Voltage and Reactive Power Control of Mini-Hydro Power Stations for Maximisation of Real  

E-Print Network [OSTI]

of a Mini-Hydro Power Generator to the Rural Grid The UK distribution network has been significantly exten1 Intelligent Voltage and Reactive Power Control of Mini-Hydro Power Stations for Maximisation Control (APFC) modes. The ability to export active and reactive power from mini-hydro power generators

Harrison, Gareth

38

Statistical Estimation of Circuit Timing Vulnerability Due to Leakage-Induced Power Grid Voltage Drop  

E-Print Network [OSTI]

Statistical Estimation of Circuit Timing Vulnerability Due to Leakage-Induced Power Grid Voltage voltage drops on the power grid that can affect circuit timing. We propose a statistical analysis supply voltage to circuit devices is referred to as the power grid. The consequences of power grid

Najm, Farid N.

39

Research on fuzzy logic based dynamic boundary voltage and reactive power integrated control method  

Science Journals Connector (OSTI)

Aiming at the existing problems of conventional substation voltage and reactive power integrated control method, a new fuzzy logic based dynamic reactive power boundary voltage and reactive power integrated control method is proposed. Fuzzy logic control ... Keywords: dynamic boundary, fuzzy logic, reactive power, voltage

Zigang Xu; Fei Wang

2009-06-01T23:59:59.000Z

40

Optimal Distributed Voltage Regulation in Power Distribution Networks  

E-Print Network [OSTI]

In this paper, we address the problem of voltage regulation in power distribution networks with deep-penetration of distributed energy resources (DERs), e.g., renewable-based generation, and storage-capable loads such as plug-in hybrid electric vehicles. We cast the problem as an optimization program, where the objective is to minimize the losses in the network subject to constraints on bus voltage magnitudes, limits on active and reactive power injections, transmission line thermal limits and losses. We provide sufficient conditions under which the optimization problem can be solved via its convex relaxation. Using data from existing networks, we show that the conditions are expected to be satisfied by most networks. We also provide an efficient distributed algorithm to solve the problem. The algorithm is asynchronous, with a communication topology that is the same as the electrical network topology. We illustrate the algorithm's performance in the IEEE 34-bus and the 123-bus feeder test systems.

Lam, Albert Y S; Dominguez-Garcia, Alejandro; Tse, David

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ac power voltage" 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

Design and analysis of modern three-phase AC/AC power converters for AC drives and utility interface  

E-Print Network [OSTI]

output current/voltage waveforms and fast dynamic response in high power areas. A new topology and control scheme for a six-step current source inverter is proposed. The proposed topology utilizes a small voltage source inverter, to turn off main...

Kwak, Sangshin

2005-08-29T23:59:59.000Z

42

Fuzzy Control on Voltage/Reactive Power in Electric Power Substation  

Science Journals Connector (OSTI)

A fuzzy method using in voltage and reactive power control in electric substation is proposed based on the improved 17 ... times at the tap positions of transformers in substation are much less than usual. So,...

Xiu-hua Wu; Jun-cheng Wang; Ping Yang…

2009-01-01T23:59:59.000Z

43

Nonlinear modal interaction in HVDC/AC power systems with dc power modulation  

SciTech Connect (OSTI)

In this paper investigation of nonlinear modal interaction using the normal form of vector fields technique is extended to HVDC/AC power systems with dc power modulation. The ac-dc interface equations are solved to form a state space model with second order approximation. Using the normal form technique, the system`s nonlinear dynamic characteristics are obtained. The proposed approach is applied to a 4-generator HVDC/AC test power system, and compare with the time domain solution.

Ni, Y.X. [Tsinghua Univ., Beijing (China)] [Tsinghua Univ., Beijing (China); Vittal, V.; Kliemann, W.; Fouad, A.A. [Iowa State Univ., Ames, IA (United States)] [Iowa State Univ., Ames, IA (United States)

1996-11-01T23:59:59.000Z

44

ePOWER Seminar AC solar cells: A new breed of PV power generation  

E-Print Network [OSTI]

ePOWER Seminar AC solar cells: A new breed of PV power generation Professor Faisal Khan Assistant dc output which needs to be processed and inverted for ac applications. Using a modern manufacturing facility, PV panels could be mass produced without any apparent issues. Unfortunately, power converters

Abolmaesumi, Purang

45

Impact of Wind Generation Variability on Voltage Profile of Radial Power Systems  

Science Journals Connector (OSTI)

This paper provides the results of a study conducted to assess the impacts of the "wind generation variability" on the voltage profile in a small-scale radial power system. The power network has been modeled using one of the well-known simulation programs ... Keywords: Wind Generation, Voltage Profile, Power Grids, Voltage Impacts, Minimum Singular Value, SSV index

M. O. Alruwaili; M. Y. Vaziri; S. Vadhva; S. Vaziri

2013-04-01T23:59:59.000Z

46

Statistical Estimation of Leakage-Induced Power Grid Voltage Drop Considering Within-Die Process Variations  

E-Print Network [OSTI]

Statistical Estimation of Leakage-Induced Power Grid Voltage Drop Considering Within-Die Process the power grid, the grid develops large voltage drops, which is an unavoidable background level of noise on the grid. We develop techniques for estimation of the statistics of the leakage-induced power grid voltage

Najm, Farid N.

47

Statistical Estimation of LeakageInduced Power Grid Voltage Drop Considering WithinDie Process Variations #  

E-Print Network [OSTI]

Statistical Estimation of Leakage­Induced Power Grid Voltage Drop Considering Within­Die Process the power grid, the grid develops large voltage drops, which is an unavoidable background level of noise on the grid. We develop techniques for estimation of the statistics of the leakage­induced power grid voltage

Najm, Farid N.

48

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

Broader source: Energy.gov (indexed) [DOE]

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.

49

Performance Analysis of a Hybrid Asymmetric Multilevel Inverter for High Voltage Active Power Filter Applications  

E-Print Network [OSTI]

Performance Analysis of a Hybrid Asymmetric Multilevel Inverter for High Voltage Active Power voltage-source inverters connected in series (known as cascaded hybrid asymmetric multilevel inverter voltage application due to semiconductor constraint. In order to achieve higher power level, hybrid

Catholic University of Chile (Universidad CatĂłlica de Chile)

50

A Static Pattern-Independent Technique for Power Grid Voltage Integrity Verification  

E-Print Network [OSTI]

A Static Pattern-Independent Technique for Power Grid Voltage Integrity Verification Dionysios Design verification must include the power grid. Checking that the voltage on the power grid does) the obviously large size of the power grids for modern high-performance chips, and ii) the difficulty of setting

Najm, Farid N.

51

A Static PatternIndependent Technique for Power Grid Voltage Integrity Verification #  

E-Print Network [OSTI]

A Static Pattern­Independent Technique for Power Grid Voltage Integrity Verification # Dionysios Design verification must include the power grid. Checking that the voltage on the power grid does) the obviously large size of the power grids for modern high­performance chips, and ii) the di#culty of setting

Najm, Farid N.

52

Importance of the Equlibrium Node in Preventing the Voltage Collapse Occurs in the Wind Power System  

E-Print Network [OSTI]

Importance of the Equlibrium Node in Preventing the Voltage Collapse Occurs in the Wind Power collapse will occurs in a wind power system is discussed next. The method of power flow calculation is the specific analysis of a given simplified wind power system. Keywords--voltage collapse; Newton

Lavaei, Javad

53

Public Opinions of Building Additional High-Voltage Electric Power Lines  

E-Print Network [OSTI]

to build new power lines. Residents living in counties with planned routes for new transmission linesPublic Opinions of Building Additional High-Voltage Electric Power Lines A Report to the National-Voltage Electric Power Lines: A Report to the National Science Foundation and the Electric Power Research Center

Tesfatsion, Leigh

54

Optimal Placement of the Wind Generators in the Medium Voltage Power Grid  

Science Journals Connector (OSTI)

The minimization of power losses in the medium voltage (MV) grid requires adjustment of network of power sources. This problem is particularly important for renewable energy sources, for example for the farms of wind generators. Their placement and nominal ... Keywords: medium voltage power grid, wind generators, genetic algorithms, parallel processing

Andrzej Jordan; Ryszard Szczebiot; Carsten Maple; Slawomir Cieslik

2011-04-01T23:59:59.000Z

55

AC-DC Microgrid Optimal Power Flow.  

E-Print Network [OSTI]

??Electricity market deregulation has opened the door for novel electricity production schemes within the existing central production paradigm that dominates the electricity power industry. The… (more)

Duggal, Inderjeet (Author)

2012-01-01T23:59:59.000Z

56

AC power | Princeton Plasma Physics Lab  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

developing an advanced power switch Scientists at the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) are assisting General Electric Co. in...

57

A Merged two-stage power conversion architecture with switched capacitor circuit for an LED driver module  

E-Print Network [OSTI]

In a power converter specified to convert from wide-range and high-level DC voltage or AC line voltage to low-level DC voltage, satisfying high efficiency, high power density, and high power factor is challenging because ...

Lim, Seungbum

2012-01-01T23:59:59.000Z

58

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

59

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

60

Research on Low-Voltage Early Warning System of Coalmine Power Grid  

Science Journals Connector (OSTI)

Research is proposed on coalmine power grid safety-running in case to insure coalmine ... voltage problem now still lying in the coalmine power grid, a method combined fuzzy comprehensive evaluation with gray com...

Tieying Zhao; Na Wang

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ac power voltage" 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

LM193/LM293/LM393/LM2903 Low Power Low Offset Voltage Dual Comparators  

E-Print Network [OSTI]

LM193/LM293/LM393/LM2903 Low Power Low Offset Voltage Dual Comparators General Description The LM clock timers; multivibrators and high voltage digital logic gates. The LM193 series was designed to directly interface with TTL and CMOS. When operated from both plus and minus power supplies, the LM193

Lanterman, Aaron

62

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

63

Real Power and Reactive Power Control of a Three-Phase Single-Stage-PV System and PV voltage Stability  

SciTech Connect (OSTI)

Grid-connected photovoltaic (PV) systems with power electronic interfaces can provide both real and reactive power to meet power system needs with appropriate control algorithms. This paper presents the control algorithm design for a three-phase single-stage grid-connected PV inverter to achieve either maximum power point tracking (MPPT) or a certain amount of real power injection, as well as the voltage/var control. The switching between MPPT control mode and a certain amount of real power control mode is automatic and seamless. Without the DC-to-DC booster stage, PV DC voltage stability is an important issue in the control design especially when the PV inverter is operating at maximum power point (MPP) with voltage/var control. The PV DC voltage collapse phenomenon and its reason are discussed. The method based on dynamic correction of the PV inverter output is proposed to ensure PV DC voltage stability. Simulation results of the single-stage PV system during system disturbances and fast solar irradiation changes confirm that the proposed control algorithm for single-stage PV inverters can provide appropriate real and reactive power services and ensure PV DC voltage stability during dynamic system operation and atmospheric conditions.

Li, Huijuan [ORNL] [ORNL; Xu, Yan [ORNL] [ORNL; Adhikari, Sarina [ORNL] [ORNL; Rizy, D Tom [ORNL] [ORNL; Li, Fangxing [ORNL] [ORNL; Irminger, Philip [ORNL] [ORNL

2012-01-01T23:59:59.000Z

64

Reactive power management of distribution networks with wind generation for improving voltage stability  

E-Print Network [OSTI]

Reactive power management of distribution networks with wind generation for improving voltage February 2013 Available online Keywords: Composite load Distributed generation D-STATCOM Q with distributed wind generation. Firstly, the impact of high wind penetration on the static voltage stability

Pota, Himanshu Roy

65

Voltage Control of Distribution Networks with Distributed Generation using Reactive Power  

E-Print Network [OSTI]

Voltage Control of Distribution Networks with Distributed Generation using Reactive Power. Nasiruzzaman Abstract--Voltage profile of distribution networks with dis- tributed generation are affected significantly due to the integra- tion of distributed generation (DG) on it. This paper presents a way

Pota, Himanshu Roy

66

Direct Power Control of Doubly-Fed Generator Based Wind Turbine Converters to Improve Low Voltage  

E-Print Network [OSTI]

Control (DPC) is discussed for Low Voltage Ride Through (LVRT) of DFIG based wind turbine converters power integration state that doubly fed induction generator (DFIG) controllers should be capable and maintaining dc bus voltage, then the DFIG will stay online during the disturbance. A fast acting controller

Kimball, Jonathan W.

67

AC Resonant charger with charge rate unrelated to primary power frequency  

DOE Patents [OSTI]

An AC resonant charger for a capacitive load, such as a PFN, is provided with a variable repetition rate unrelated to the frequency of a multi-phase AC power source by using a control unit to select and couple the phase of the power source to the resonant charger in order to charge the capacitive load with a phase that is the next to begin a half cycle. For optimum range in repetition rate and increased charging voltage, the resonant charger includes a step-up transformer and full-wave rectifier. The next phase selected may then be of either polarity, but is always selected to be of a polarity opposite the polarity of the last phase selected so that the transformer core does not saturate. Thyristors are used to select and couple the correct phase just after its zero crossover in response to a sharp pulse generated by a zero-crossover detector. The thyristor that is turned on then automatically turns off after a full half cycle of its associated phase input. A full-wave rectifier couples the secondary winding of the transformer to the load so that the load capacitance is always charged with the same polarity.

Watson, Harold (Torrance, CA)

1982-01-01T23:59:59.000Z

68

Scaling Analysis of On-Chip Power Grid Voltage Variations in Nanometer Scale ULSI  

Science Journals Connector (OSTI)

This paper presents a detailed scaling analysis of the power supply distribution network voltage drop in DSM technologies. The effects of chip temperature, electromigration and interconnect technology scaling (in...

Amir H. Ajami; Kaustav Banerjee…

2005-03-01T23:59:59.000Z

69

Dynamic modeling and direct power control of wind turbine driven DFIG under unbalanced network voltage conditions  

Science Journals Connector (OSTI)

This paper proposes an analysis and a direct power control (DPC) design of a wind turbine driven doubly-fed induction generator (DFIG) under unbalanced network voltage conditions. A DFIG model described in the po...

Jia-bing Hu; Yi-kang He; Lie Xu

2008-12-01T23:59:59.000Z

70

Low-voltage, low-power circuits for data communication systems  

E-Print Network [OSTI]

There are growing industrial demands for low-voltage supply and low-power consumption circuits and systems. This is especially true for very high integration level and very large scale integrated (VLSI) mixed-signal chips and system...

Chen, Mingdeng

2005-02-17T23:59:59.000Z

71

Geomagnetically induced currents in the Uruguayan high-voltage power grid  

Science Journals Connector (OSTI)

......currents in the Uruguayan high-voltage power grid R. Caraballo 1 2 L. Sanchez Bettucci...simple topology of the Uruguayan power grid provides some advantages in the calculation...transformers at the South African power grid during the Halloween storm in 2003......

R. Caraballo; L. Sánchez Bettucci; G. Tancredi

2013-01-01T23:59:59.000Z

72

A Worst-Case Circuit Delay Verification Technique Considering Power Grid Voltage Variations  

E-Print Network [OSTI]

A Worst-Case Circuit Delay Verification Technique Considering Power Grid Voltage Variations then these critical paths we tie the supplies of the gates to physical power grids and re-analyze for the worst- case and report on the implementation results using benchmark circuits tied to a number of test-case power grids

Najm, Farid N.

73

Analysis of the UHV Tie Line Active Power Peak Value of Weak Interconnected Grids Following Power Shortage Disturbance in China Power System  

Science Journals Connector (OSTI)

An ultra high voltage (UHV) AC tie line that connects North China ... peak value of active power oscillation of the UHV AC tie line following power shortage disturbance. ... The typical process of the oscillation...

Feng Hong; Jinfu Chen; Xianzhong Duan

2012-01-01T23:59:59.000Z

74

LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset Voltage Quad Comparators  

E-Print Network [OSTI]

LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset Voltage Quad Comparators General Description The LM139 series consists of four independent precision voltage comparators with an offset voltage clock timers; multivibrators and high voltage digital logic gates. The LM139 series was designed

Lanterman, Aaron

75

The Matrix Converter Drive Performance Under Abnormal Input Voltage Conditions  

E-Print Network [OSTI]

that generates variable magnitude variable frequency output voltage from the ac utility line. It has high power voltage disturbance related performance issues of the MC drive. Since the MC is a direct frequencyThe Matrix Converter Drive Performance Under Abnormal Input Voltage Conditions Jun-Koo Kang

Hava, Ahmet

76

Miniaturized, low-voltage power converters with fast dynamic response  

E-Print Network [OSTI]

This thesis introduces a two-stage architecture that combines the strengths of switched capacitor (SC) techniques (small size, light-load performance) with the high efficiency and regulation capability of switch-mode power ...

Giuliano, David (David Michael)

2013-01-01T23:59:59.000Z

77

Superconducting Cables for a.c. and d.c. Power Transmission  

Science Journals Connector (OSTI)

...1973 research-article Superconducting Cables for a.c. and d.c. Power Transmission...power transmission lines. Some present cables are water cooled to increase their current...both a.c. and d.c. superconducting cables are described, with particular attention...

1973-01-01T23:59:59.000Z

78

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

SciTech Connect (OSTI)

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

79

Voltage asymmetry at the buses of a combined substation  

Science Journals Connector (OSTI)

The voltage asymmetry at the buses of a combined (ac/dc) substation is calculated by phase method, using Mathcad ... , power may be supplied to a combined substation along a common line from a limited-...

A. G. Pakulin; V. A. Zagorskii; V. F. Put’ko

2013-07-01T23:59:59.000Z

80

Voltage and Frequency Control in Offshore Wind Turbines Connected to Isolated Oil Platform Power Systems  

Science Journals Connector (OSTI)

Offshore wind turbines have potential to supply offshore oil and gas platforms in the North Sea with electric energy. For remote located facilities it is attractive to pursue a solution where the wind turbines and oil platform operate in an isolated system. To study the operational properties of a system with these characteristics is necessary to identify possible advantages and disadvantages. This paper demonstrates how added voltage and frequency control in wind turbines equipped with full power electronic converters can improve the voltage and frequency stability in offshore oil and gas installations. The work is based on an electrical simulation model built in the PSCAD software. In the proposed transient simulation scenarios, the voltage dip is reduced from 16% to 6%, while the frequency overshoot is reduced from 97% to 25%. These are significant improvements that should be taken into consideration when offshore wind power is evaluated as power supply to oil installations.

Atle Rygg Ĺrdal; Tore Undeland; Kamran Sharifabadi

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ac power voltage" 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

An expert system for voltage control in a power system network  

SciTech Connect (OSTI)

This paper presents a prototype of an expert system for alleviation of voltage violations in the day-to-day operation of large power networks. Voltage control for varying load and generation conditions can be achieved by co-ordinated control of switchable shunt VAR compensating (SVC) devices and On load transformer taps (OLTC), while generator excitations are used in dynamic control of voltage profile. This paper deals with the development of an expert system for voltage corrections for base case and contingency conditions using switchable shunt reactive compensation and transformer tap settings. The performance of the expert system is compared with the conventional optimization technique of voltage control and concurrent results have been obtained. The proposed expert system has been tested with simulated conditions of a few practical power systems. Results obtained for a 24 bus EHV Indian power network have been included for illustration purpose. The expert system is found to be suitable for on-line application in Energy Control Center as the solution is obtained very fast.

Bansilal; Thukaram, D.; Parthasarathy, K. [Indian Inst. of Science, Bangalore (India). Dept. of Electrical Engineering

1995-12-31T23:59:59.000Z

82

Soft-Switching High-Frequency AC-Link Universal Power Converters with Galvanic Isolation  

E-Print Network [OSTI]

be used in a variety of applications, including photovoltaic power generation, wind power generation, and electric vehicles. In these converters the link current and voltage are both alternating and their frequency can be high, which leads...

Amirabadi, Mahshid

2013-08-07T23:59:59.000Z

83

TRANSIENT CURRENTSAM) VOLTAGES IN A POWER DISTRIBUTION SYSTEM DUE TO NATURAL LIGHTNING  

E-Print Network [OSTI]

July 1995, a lightning flash struck earth tens of meters away from the test system's conductors. On 11 of the test distribution system at ICLRT for the lightning flashes analyzed are given in Figs. 1 and 2TRANSIENT CURRENTSAM) VOLTAGES IN A POWER DISTRIBUTION SYSTEM DUE TO NATURAL LIGHTNING M

Florida, University of

84

Method for reducing fuel cell output voltage to permit low power operation  

DOE Patents [OSTI]

Fuel cell performance is degraded by recycling a portion of the cathode exhaust through the cells and, if necessary, also reducing the total air flow to the cells for the purpose of permitting operation below a power level which would otherwise result in excessive voltage.

Reiser, Carl A. (Glastonbury, CT); Landau, Michael B. (West Hartford, CT)

1980-01-01T23:59:59.000Z

85

Power control of a wind farm with active stall wind turbines and AC grid connection  

E-Print Network [OSTI]

Power control of a wind farm with active stall wind turbines and AC grid connection Anca D. Hansen1 controller for a wind farm made-up exclusively of active stall wind turbines with AC grid connection wind farm control involves both the control on wind turbine level as well as the central control

86

Conditions for Capacitor Voltage Regulation in a Five-Level Cascade Multilevel Inverter: Application to Voltage-Boost in a PM Drive  

E-Print Network [OSTI]

Conditions for Capacitor Voltage Regulation in a Five-Level Cascade Multilevel Inverter Abstract-- A cascade multilevel inverter is a power electronic device built to synthesize a desired AC voltage from several levels of DC voltages. Such inverters have been the subject of research in the last

Tolbert, Leon M.

87

A nonlinear robust HVDC control for a parallel AC/DC power system  

E-Print Network [OSTI]

A nonlinear robust HVDC control for a parallel AC/DC power system Hongzhi Cai a , Zhihua Qu b. Keywords: Robust control; HVDC; Power system; Stability; Lyapunov method 1. Introduction It has been recognized that, through an HVDC transmission line, fast electronic control can be applied on the DC power

Qu, Zhihua

88

Impact of Wind Power Plants on Voltage and Transient Stability of Power Systems  

SciTech Connect (OSTI)

A standard three-machine, nine-bus wind power system is studied and augmented by a radially connected wind power plant that contains 22 wind turbine generators.

Muljadi, E.; Nguyen, Tony B.; Pai, M. A.

2008-09-30T23:59:59.000Z

89

Current-based direct power control of a DFIG under unbalanced grid voltage  

Science Journals Connector (OSTI)

Abstract A novel current-based direct power control (CB-DPC) strategy for a grid-connected doubly-fed induction generator (DFIG) is proposed. The reported control scheme is applicable to DFIG-based variable-speed wind turbines that operate under unbalanced network voltages. The required DFIG rotor voltage for precise regulation of the stator active and reactive output powers and accurate elimination of their inherent pulsations are directly obtained using a nonlinear integral sliding-mode control (ISMC) scheme. Compared with other control methods, the proposed strategy is simpler since it is not based on the symmetrical components theory, does not need multiple synchronous coordinate transformations, and only requires DFIG voltage and current values as its inputs. Constant switching frequency of the rotor-side converter (RSC) is achieved by means of space vector pulse-width modulation (SVPWM) technique. Uncertainties in the parameters of the generator are included in the design. A compensation strategy is also proposed for tracking error mitigation of the powers that occur due to elimination of the chattering phenomena in the ISMC scheme. Simulation results on a 2MW DFIG under different operating conditions are presented to validate the effectiveness and robustness of the proposed method.

Mohammad Farshadnia; Seyed Abbas Taher

2014-01-01T23:59:59.000Z

90

Designing AC Power Grids using Integer Linear Programming  

E-Print Network [OSTI]

A power grid is a transmission network transporting electrical energy from power ... cost factor for the active power losses, Re the line resistance, and Xe the ...

2011-02-18T23:59:59.000Z

91

High voltage power supplies for the neutral beam injectors of the stellarator TJ-II  

Science Journals Connector (OSTI)

Neutral beam injection will be available for the second experimental phase of TJ-II. Two injectors, set in co-counter configuration, will inject into the plasma two 40 keV H0 beams, each of up to 1 MW. The two high voltage power supplies to feed the acceleration grids of the injectors, described in this paper, are of the transformer–rectifier type, taking their primary energy from a pulsed flywheel generator, and are coupled to the acceleration grids through a switching device. This environment effectively sets the main operation limits and protection requirements of the power supplies.

J Alonso; M Liniers; L Mart??nez Laso; E Jauregi; C Luc??a; F Valcárcel

2001-01-01T23:59:59.000Z

92

Utility-Scale Power Router: Dynamic Control of Grid Assets Using Direct AC Converter Cells  

SciTech Connect (OSTI)

ADEPT Project: Georgia Tech is developing a cost-effective, utility-scale power router that uses an enhanced transformer to more efficiently direct power on the grid. Existing power routing technologies are too expensive for widespread use, but the ability to route grid power to match real-time demand and power outages would significantly reduce energy costs for utilities, municipalities, and consumers. Georgia Tech is adding a power converter to an existing grid transformer to better control power flows at about 1/10th the cost of existing power routing solutions. Transformers convert the high-voltage electricity that is transmitted through the grid into the low-voltage electricity that is used by homes and businesses. The added converter uses fewer steps to convert some types of power and eliminates unnecessary power storage, among other improvements. The enhanced transformer is more efficient, and it would still work even if the converter fails, ensuring grid reliability.

None

2010-09-01T23:59:59.000Z

93

Determinationof the power transfer capacityof a UPFCwith considerationof the system and  

E-Print Network [OSTI]

transmission system (FACTS) devices provide new altematives in expanding the power transmission capacity inverters are interconnected via the DC link provided by a DC storage capacitor. The real power can flow reactive power at its own AC terminals. The series inverter injects onto the line voltage an AC voltage Vr

Qu, Zhihua

94

Breaking the ice: de-icing power transmission lines with high-frequency, high-voltage excitation  

E-Print Network [OSTI]

Breaking the ice: de-icing power transmission lines with high-frequency, high-voltage excitation of this work in other works must be obtained from the IEEE. #12;CING OF POWER TRANSMISSION lines during winter that applies 33-kV, 100-kHz power. TheoverallsystemisillustratedinFigure1.Itcouldbede- ployed in two different

95

Design Techniques for High Speed Low Voltage and Low Power Non-Calibrated Pipeline Analog to Digital Converters  

E-Print Network [OSTI]

DESIGN TECHNIQUES FOR HIGH SPEED LOW VOLTAGE AND LOW POWER NON-CALIBRATED PIPELINE ANALOG TO DIGITAL CONVERTERS A Dissertation by RIDA SHAWKY ASSAAD Submitted to the Office of Graduate Studies of Texas A&M University... in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY December 2009 Major Subject: Electrical Engineering DESIGN TECHNIQUES FOR HIGH SPEED LOW VOLTAGE AND LOW POWER NON-CALIBRATED PIPELINE ANALOG TO DIGITAL...

Assaad, Rida Shawky

2011-02-22T23:59:59.000Z

96

The War of the Currents: AC vs. DC Power | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

The War of the Currents: AC vs. DC Power The War of the Currents: AC vs. DC Power The War of the Currents: AC vs. DC Power November 20, 2013 - 3:52pm Addthis Electrical transmission lines cross a snow-covered field in Dallas Dam, Oregon. | Photo courtesy of the Energy Department Flickr page. Electrical transmission lines cross a snow-covered field in Dallas Dam, Oregon. | Photo courtesy of the Energy Department Flickr page. Allison Lantero Allison Lantero Public Affairs Specialist, Office of Public Affairs Tesla vs. Edison Are you on #TeamTesla or #TeamEdison? Vote now on our website for your favorite inventor! Submit questions for Tesla and Edison experts to answer during our live Google+ Hangout on Thursday, Nov. 21, at 12:30 p.m. EST. Read our lists of top facts about Thomas Edison and Nikola Tesla.

97

Modeling and improvement of direct power control of DFIG under unbalanced grid voltage condition  

Science Journals Connector (OSTI)

Abstract This paper presents analysis and control of a doubly-fed induction generator (DFIG)-based wind generation system operating under unbalanced grid voltage condition. The DFIG system is modeled in synchronous positive reference frame. System behavior and operation of both the generator and the grid side converter (GSC) under unbalanced condition is illustrated by definition of oscillating power terms in the synchronous reference frame. This analysis makes it possible to control both the active and reactive power generation by means of direct power control (DPC) technique. It is shown that considering the DFIG model in synchronous reference frame simplifies the power terms extraction. Moreover, alternative DFIG control targets such as reducing unbalanced stator current, torque and power pulsations minimization, are considered. In addition, by the proposed method, the oscillation of the stator output power is compensated by the GSC, to ensure constant power output from the overall DFIG generation system. The validation of results has been performed through simulation results on a 2 MW DFIG wind generation system.

Mohammad Jafar Zandzadeh; Abolfazl Vahedi

2014-01-01T23:59:59.000Z

98

Digital ac monitor  

DOE Patents [OSTI]

An apparatus and method is provided for monitoring a plurality of analog ac circuits by sampling the voltage and current waveform in each circuit at predetermined intervals, converting the analog current and voltage samples to digital format, storing the digitized current and voltage samples and using the stored digitized current and voltage samples to calculate a variety of electrical parameters; some of which are derived from the stored samples. The non-derived quantities are repeatedly calculated and stored over many separate cycles then averaged. The derived quantities are then calculated at the end of an averaging period. This produces a more accurate reading, especially when averaging over a period in which the power varies over a wide dynamic range. Frequency is measured by timing three cycles of the voltage waveform using the upward zero crossover point as a starting point for a digital timer. 24 figs.

Hart, G.W.; Kern, E.C. Jr.

1987-06-09T23:59:59.000Z

99

Meter Any Wire, Anywhere by Virtualizing the Voltage Channel Thomas Schmid, David Culler, Prabal Dutta  

E-Print Network [OSTI]

Meter Any Wire, Anywhere by Virtualizing the Voltage Channel Thomas Schmid, David Culler, Prabal}@eecs.umich.edu culler@cs.berkeley.edu Abstract AC power meters require both voltage and current to be sampled physical proximity and fed into a single power metering de- vice. In this paper, we explore the viability

Dutta, Prabal

100

LM139,LM239,LM2901,LM3302,LM339 LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset Voltage Quad  

E-Print Network [OSTI]

LM139,LM239,LM2901,LM3302,LM339 LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset Voltage Quad Comparators Literature Number: SNOSBJ3C #12;LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset Voltage Quad Comparators General Description The LM139 series consists of four independent precision voltage comparators

Ravikumar, B.

Note: This page contains sample records for the topic "ac power voltage" 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

Leveraging the LEDA high voltage power supply systems for the LANSCE refurbishment project  

SciTech Connect (OSTI)

The LANSCE Refurbishment Project (LANSCE-R) will revitalize the LANSCE accelerator infrastructure. Much of the equipment has been in use for over 39 years and is approaching the end of its design lifetime. As obsolescence issues make like-for-like replacements increasingly more expensive, modern systems with lower costs become a reasonable alternative. As part of the LANSCE-R project, four of the seven HV power supplies for the 805 MHz RF klystrons will be replaced. The present and future requirements for these power supplies influence the selection of replacement options. Details of the HV power supply replacement requirements and the different replacement options will be discussed. One option is to use four 95 kV, 21 A DC power supplies originally installed nearby as part of the Low Energy Demonstration Accelerator (LEDA) project. Significant material and labor cost savings can be achieved by leaving these supplies installed where they are and building a HV transport system to bring high voltage power from the existing LEDA facility to the LANSCE facility. The different replacement options will be compared based on material and labor costs as offset by long-term energy savings.

Bradley Iii, Joseph Thomas [Los Alamos National Laboratory; Rees, Daniel E [Los Alamos National Laboratory; Roybal, William T [Los Alamos National Laboratory; Young, Karen A [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

102

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 53, NO. 2, APRIL 2006 477 Voltage-Source Active Power Filter Based on  

E-Print Network [OSTI]

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 53, NO. 2, APRIL 2006 477 Voltage-Source Active compensate load current harmonics, keeping better-quality sinusoidal currents from the source. The simulated MODERN power electronics have contributed a great deal to the development of new powerful applications

Catholic University of Chile (Universidad CatĂłlica de Chile)

103

IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 7, NO. 2, MAY 1992, PP. 673 683. POINT OF COLLAPSE METHODS APPLIED TO AC DC POWER SYSTEMS  

E-Print Network [OSTI]

-node bifurcations in power systems including high voltage direct current HVDC transmission. Bus voltage pro les, become plausible when the dynamics for the HVDC system are included. Keywords: Voltage collapse, HVDC the subject of increasing study over the past few years 1 . Furthermore, the relative wide spread use of HVDC

Cañizares, Claudio A.

104

E-Print Network 3.0 - automatic reactive power Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

power Page: << < 1 2 3 4 5 > >> 1 Power control of a wind farm with active stall wind turbines and AC grid connection Summary: , reactive power control and automatic voltage...

105

AC system stability analysis and assessment for Shipboard Power Systems  

E-Print Network [OSTI]

during reconfiguration. A test SPS computer model, whose simulation results were used for stability studies, is presented in this dissertation. The model used a new generalized methodology for modeling and simulating ungrounded stiffly grounded power...

Qi, Li

2006-04-12T23:59:59.000Z

106

AC Loss of Ripple Current in Superconducting DC Power Transmission Cable  

Science Journals Connector (OSTI)

Abstract As a method of largely reducing the transmission loss in the electric power grid, superconducting direct current (DC) power transmission cable has been investigated. Using superconducting DC power transmission cables, large amounts of current and energy can be transferred compared to conventional copper cables. In this case, an alternating current (AC) is converted to DC and superposed AC which is known as ripple current, and the energy loss by the ripple current is generated. Therefore it is desired to estimate the energy loss density for the case of DC current and superposed AC current for a design of DC transmission cable system. In this study, the hysteresis loss for DC current of 2 kA rectified from 60 Hz alternating current is calculated using the Bean model, and coupling loss was also estimated. The diameter of the cable was 40 mm. The ripple currents generated by multi-pulse rectifiers, 6-pulse, 12-pulse, and 24-pulse were considered. It is found that the total AC loss including the hysteresis loss and the coupling loss is considerably smaller than the supposed heat loss of 0.5 W/m which is obtained with a newly developed cable.

K. Yoshitomi; E.S. Otabe; V.S. Vyatkin; M. Kiuchi; T. Matsushita; M. Hamabe; S. Yamaguchi; R. Inada

2014-01-01T23:59:59.000Z

107

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

108

Development of a 10 kW High Temperature High Power Density Three-Phase AC-DC-AC SiC Converter  

SciTech Connect (OSTI)

This paper presents the development and experimental performance of a 10 kW, all SiC, 250 C junction temperature high-power-density three-phase ac-dc-ac converter. The electromagnetic interference filter, thermal system, high temperature package, and gate drive design are discussed in detail. Finally, tests confirming the feasibility and validating the theoretical basis of the prototype converter system are described.

Ning, Puqi [ORNL

2012-01-01T23:59:59.000Z

109

Using Dielectric Losses to De-Ice Power Transmission Lines with 100 kHz High-Voltage  

E-Print Network [OSTI]

capable of exciting a 1 m test line to 30 kV has been tested and show to be capable of removing a 7 mm iceUsing Dielectric Losses to De-Ice Power Transmission Lines with 100 kHz High-Voltage Excitation J DIELECTRIC LOSSES TO DE-ICE POWER TRANSMISSION LINES . . . 1 Using Dielectric Losses to De-Ice Power

110

New live line tester for porcelain suspension insulators on high-voltage power lines  

SciTech Connect (OSTI)

Suspension insulator assemblies known as insulator strings are used in overhead power transmission lines to mechanically support high-voltage conductors while providing adequate insulation to withstand switching and lightning overvoltages. Since the useful life in service of the individual insulator elements making up these strings is hard to predict, they must be verified periodically to insure that adequate line reliability is maintained at all times. Over the years many testing methods have been used for this purpose, each one with its own advantages and disadvantages. Until now at Hydro-Quebec, porcelain insulators had been tested by the buzz method which simply consists of applying a short-circuit to each insulator in a string and listening for a buzz-like sound indicating a good insulator. However, safety considerations that preclude short-circuiting insulators and other disadvantages of that method have led Hydro-Quebec to undertake and complete the development of a new insulator tester. The working principle of this new device is based on the automatic measurement and recording of the electric field along the insulator string which decreases considerably in front of an internally-shorted insulator. The tester is slid along the string while the insulators are counted automatically. The information from tests on up to 200 strings can be stored in the device to be later transferred in a host computer for interpretation and/or permanent storage. The new tester also gives information on voltage distribution along the insulator strings which can be useful for the design of future power transmission lines.

Vaillancourt, G.H.; St-Jean, M. (Hydro-Quebec, Varennes, Quebec (Canada)); Bellerive, J.P. (Hydro-Quebec, Montreal, Quebec (Canada)); Jean, C. (Positron Inc., Montreal, Quebec (Canada))

1994-01-01T23:59:59.000Z

111

AC PV Modules Take a standard DC PV module and connect a microinverter  

E-Print Network [OSTI]

modules. These inverters range in power from 700 watts up to 1 megawatt. DC maximum system voltages can and up to 13 inverters for the 210 W version to be installed on the same AC output cable. home power 136, and secure a listing to UL1741 for a pre-assembled module/inverter device, and you have an AC PV module

Johnson, Eric E.

112

Local Voltage Support from Distributed Energy Resources to Prevent Air Conditioner Motor Stalling  

SciTech Connect (OSTI)

Microgrid voltage collapse often happens when there is a high percentage of low inertia air-conditioning (AC) motors in the power systems. The stalling of the AC motors results in Fault Induced Delayed Voltage Recovery (FIDVR). A hybrid load model including typical building loads, AC motor loads, and other induction motor loads is built to simulate the motoring stalling phenomena. Furthermore, distributed energy resources (DE) with local voltage support capability are utilized to boost the local bus voltage during a fault, and prevent the motor stalling. The simulation results are presented. The analysis of the simulation results show that local voltage support from multiple DEs can effectively and economically solve the microgrid voltage collapse problem.

Baone, Chaitanya A [ORNL] [ORNL; Xu, Yan [ORNL] [ORNL; Kueck, John D [ORNL] [ORNL

2010-01-01T23:59:59.000Z

113

Voltage balanced multilevel voltage source converter system  

DOE Patents [OSTI]

A voltage balanced multilevel converter for high power AC applications such as adjustable speed motor drives and back-to-back DC intertie of adjacent power systems. This converter provides a multilevel rectifier, a multilevel inverter, and a DC link between the rectifier and the inverter allowing voltage balancing between each of the voltage levels within the multilevel converter. The rectifier is equipped with at least one phase leg and a source input node for each of the phases. The rectifier is further equipped with a plurality of rectifier DC output nodes. The inverter is equipped with at least one phase leg and a load output node for each of the phases. The inverter is further equipped with a plurality of inverter DC input nodes. The DC link is equipped with a plurality of rectifier charging means and a plurality of inverter discharging means. The plurality of rectifier charging means are connected in series with one of the rectifier charging means disposed between and connected in an operable relationship with each adjacent pair of rectifier DC output nodes. The plurality of inverter discharging means are connected in series with one of the inverter discharging means disposed between and connected in an operable relationship with each adjacent pair of inverter DC input nodes. Each of said rectifier DC output nodes are individually electrically connected to the respective inverter DC input nodes. By this means, each of the rectifier DC output nodes and each of the inverter DC input nodes are voltage balanced by the respective charging and discharging of the rectifier charging means and the inverter discharging means.

Peng, Fang Zheng (Oak Ridge, TN); Lai, Jih-Sheng (Knoxville, TN)

1997-01-01T23:59:59.000Z

114

Voltage balanced multilevel voltage source converter system  

DOE Patents [OSTI]

Disclosed is a voltage balanced multilevel converter for high power AC applications such as adjustable speed motor drives and back-to-back DC intertie of adjacent power systems. This converter provides a multilevel rectifier, a multilevel inverter, and a DC link between the rectifier and the inverter allowing voltage balancing between each of the voltage levels within the multilevel converter. The rectifier is equipped with at least one phase leg and a source input node for each of the phases. The rectifier is further equipped with a plurality of rectifier DC output nodes. The inverter is equipped with at least one phase leg and a load output node for each of the phases. The inverter is further equipped with a plurality of inverter DC input nodes. The DC link is equipped with a plurality of rectifier charging means and a plurality of inverter discharging means. The plurality of rectifier charging means are connected in series with one of the rectifier charging means disposed between and connected in an operable relationship with each adjacent pair of rectifier DC output nodes. The plurality of inverter discharging means are connected in series with one of the inverter discharging means disposed between and connected in an operable relationship with each adjacent pair of inverter DC input nodes. Each of said rectifier DC output nodes are individually electrically connected to the respective inverter DC input nodes. By this means, each of the rectifier DC output nodes and each of the inverter DC input nodes are voltage balanced by the respective charging and discharging of the rectifier charging means and the inverter discharging means. 15 figs.

Peng, F.Z.; Lai, J.S.

1997-07-01T23:59:59.000Z

115

The Application of Planning to Power Substation Voltage Control Keith Bell, Andrew Coles, Maria Fox, Derek Long and Amanda Smith  

E-Print Network [OSTI]

The Application of Planning to Power Substation Voltage Control Keith Bell, Andrew Coles, Maria Fox substations is a complex control task involving the coordination of interactions between cus- tomer demand and substation components. In this paper we look at the efficient management of substations in a pre-fault state

Coles, Andrew

116

AC loss characteristics of superconducting power transmission cables: gap effect and  

Science Journals Connector (OSTI)

Four groups of superconducting power transmission cables composed of coated conductors with 4.0 mm width and 2 µm superconductor thickness have been designed, including mono-layer, two-layer, four-layer and six-layer cables. In each group, three types of cables have been constructed with gaps of different size between adjacent coated conductors, which are classified into small gap, medium gap and large gap. Moreover, different lateral critical current density (Jc) distributions, specifically a uniform distribution and a trapezoidal distribution with a sloping shoulder, have been assumed while calculating the AC losses of these cables numerically by using a one-dimensional FEM model. Numerical results show that AC losses in mono-layer cables are significantly influenced by gaps between coated conductors as well as lateral Jc distribution, while cables with many layers are hardly affected by them. This proves that small gaps between coated conductors are not absolutely essential to reduce AC losses in multi-layer cables, and a sloping shoulder of the Jc distribution is more allowable in multi-layer cables than in mono-layer cables. The AC loss distributions among layers in six-layer cables are presented and the reasons for different influences of the gap as well as the lateral Jc distribution in mono-layer and multi-layer cables are discussed.

Quan Li; Naoyuki Amemiya; Katsutoku Takeuchi; Taketsune Nakamura; Noboru Fujiwara

2010-01-01T23:59:59.000Z

117

ESBWR response to an extended station blackout/loss of all AC power  

SciTech Connect (OSTI)

U.S. federal regulations require light water cooled nuclear power plants to cope with Station Blackouts for a predetermined amount of time based on design factors for the plant. U.S. regulations define Station Blackout (SBO) as a loss of the offsite electric power system concurrent with turbine trip and unavailability of the onsite emergency AC power system. According to U.S. regulations, typically the coping period for an SBO is 4 hours and can be as long as 16 hours for currently operating BWR plants. Being able to cope with an SBO and loss of all AC power is required by international regulators as well. The U.S. licensing basis for the ESBWR is a coping period of 72 hours for an SBO based on U.S. NRC requirements for passive safety plants. In the event of an extended SBO (viz., greater than 72 hours), the ESBWR response shows that the design is able to cope with the event for at least 7 days without AC electrical power or operator action. ESBWR is a Generation III+ reactor design with an array of passive safety systems. The ESBWR primary success path for mitigation of an SBO event is the Isolation Condenser System (ICS). The ICS is a passive, closed loop, safety system that initiates automatically on a loss of power. Upon Station Blackout or loss of all AC power, the ICS begins removing decay heat from the Reactor Pressure Vessel (RPV) by (i) condensing the steam into water in heat exchangers located in pools of water above the containment, and (ii) transferring the decay heat to the atmosphere. The condensed water is then returned by gravity to cool the reactor again. The ICS alone is capable of maintaining the ESBWR in a safe shutdown condition after an SBO for an extended period. The fuel remains covered throughout the SBO event. The ICS is able to remove decay heat from the RPV for at least 7 days and maintains the reactor in a safe shutdown condition. The water level in the RPV remains well above the top of active fuel for the duration of the SBO event. Beyond 7 days, only a few simple actions are needed to cope with the SBO for an indefinite amount of time. The operation of the ICS as the primary success path for mitigation of an SBO, allows for near immediate plant restart once power is restored. (authors)

Barrett, A. J.; Marquino, W. [New Plants Engineering, GE Hitachi Nuclear Energy, M/CA 75, 3901 Castle Hayne Road, Wilmington, NC 28402 (United States)

2012-07-01T23:59:59.000Z

118

Coupled numerical modelling of power loss generation in busbar system of low-voltage switchgear  

Science Journals Connector (OSTI)

Abstract This paper presents a coupled mathematical model of the heat transfer processes in an electric switchgear. The considered problem required the computation of the detailed distribution of the power losses and all the heat transfer modes (radiation, convection, and conduction) within a unit. In this complex thermal analysis, different definitions of electric busbar heating were considered and compared. The most advanced model, which couples the thermal and electromagnetic fields in two ways, was also compared with the simplified approaches. First, the direct current loading of the busbar, which neglected the alternating current effects, was considered. Second, models that included only one method of coupling were calculated for different assumed average busbar temperatures. Finally, the model with the two-way coupling, which took the eddy currents and proximity effects into account, was simulated using an iteration loop between the electromagnetic and fluid flow solvers. This study employed a geometrical model of industrial low-voltage switchgear. The presented mathematical model was also validated against temperature measurements carried out by a certified laboratory. The obtained results show that a fully coupled model produces very satisfactory agreement between computed and experimental data.

Mateusz Bedkowski; Jacek Smolka; Krzysztof Banasiak; Zbigniew Bulinski; Andrzej J. Nowak; Tomasz Tomanek; Adam Wajda

2014-01-01T23:59:59.000Z

119

Voltage/Pitch Control for Maximization and Regulation of Active/Reactive Powers in Wind Turbines with Uncertainties  

E-Print Network [OSTI]

This paper addresses the problem of controlling a variable-speed wind turbine with a Doubly Fed Induction Generator (DFIG), modeled as an electromechanically-coupled nonlinear system with rotor voltages and blade pitch angle as its inputs, active and reactive powers as its outputs, and most of the aerodynamic and mechanical parameters as its uncertainties. Using a blend of linear and nonlinear control strategies (including feedback linearization, pole placement, uncertainty estimation, and gradient-based potential function minimization) as well as time-scale separation in the dynamics, we develop a controller that is capable of maximizing the active power in the Maximum Power Tracking (MPT) mode, regulating the active power in the Power Regulation (PR) mode, seamlessly switching between the two modes, and simultaneously adjusting the reactive power to achieve a desired power factor. The controller consists of four cascaded components, uses realistic feedback signals, and operates without knowledge of the C_p-...

Guo, Yi; Jiang, John N; Tang, Choon Yik; Ramakumar, Rama G

2010-01-01T23:59:59.000Z

120

Power superconducting power transmission cable  

DOE Patents [OSTI]

The present invention is for a compact superconducting power transmission cable operating at distribution level voltages. The superconducting cable is a conductor with a number of tapes assembled into a subconductor. These conductors are then mounted co-planarly in an elongated dielectric to produce a 3-phase cable. The arrangement increases the magnetic field parallel to the tapes thereby reducing ac losses.

Ashworth, Stephen P. (Cambridge, GB)

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ac power voltage" 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

Advance Three Phase Power Factor Correction Schemes for Utility Interface of Power Electronic Systems  

E-Print Network [OSTI]

systems, battery chargers and data centers etc. Also, high voltage DC (HVDC) systems employ rectifiers to convert ac input to DC output. HVDC is one example of the application of AC/DC conversion, in power system also, grid tie of two different power...

Albader, Mesaad

2014-07-30T23:59:59.000Z

122

Impact of Increasing Distributed Wind Power and Wind Turbine Siting on Rural Distribution Feeder Voltage Profiles: Preprint  

SciTech Connect (OSTI)

Many favorable wind energy resources in North America are located in remote locations without direct access to the transmission grid. Building transmission lines to connect remotely-located wind power plants to large load centers has become a barrier to increasing wind power penetration in North America. By connecting utility-sized megawatt-scale wind turbines to the distribution system, wind power supplied to consumers could be increased greatly. However, the impact of including megawatt-scale wind turbines on distribution feeders needs to be studied. The work presented here examined the impact that siting and power output of megawatt-scale wind turbines have on distribution feeder voltage. This is the start of work to present a general guide to megawatt-scale wind turbine impact on the distribution feeder and finding the amount of wind power that can be added without adversely impacting the distribution feeder operation, reliability, and power quality.

Allen, A.; Zhang, Y. C.; Hodge, B. M.

2013-09-01T23:59:59.000Z

123

ACS Installation During SM3B Introduction  

E-Print Network [OSTI]

ACS Installation During SM3B Introduction: · Installed during SM3B in March 2002 · Powerful 3rd · Over-voltage Protection kit installed · Optical Control Electronics connected · New Outer Blanket Layer, and coronagraph ­ Solar Blind Channel (SBC) : HST's most sensitive ultraviolet photon-counting detector 115-180 nm

Sirianni, Marco

124

Boosting the voltage of a salinity-gradient-power electrochemical cell by means of complex-forming solutions  

Science Journals Connector (OSTI)

We report experiments on a concentration cell with zinc electrodes and ZnCl2 solutions at different concentrations separated by a porous diaphragm. The cell is aimed at the conversion of the free energy associated to the concentration difference into electrical energy for renewable and clean energy applications. Usually the diffusion of the solute across the diaphragm constitutes a waste of free energy which impairs the voltage generation of the concentration cell with respect to other well-known techniques that work quasi-reversibly such as reverse electrodialysis or the “mixing entropy battery.” Quite surprisingly we find that the voltage produced by our concentration cell is significantly higher than the voltage obtained with the other quasi-reversible techniques. We show that the surplus voltage comes from the active transformation of the mixing free energy into electrical energy performed by the liquid junction and we show the connection with the negative apparent transference number of the zinc ion. This fortunate consequence of using ZnCl2 solution is ultimately related to the formation of complexes. We present the results of a cell for power production which has excellent performances with respect to known salinity-difference-power methods.

2014-01-01T23:59:59.000Z

125

Technical-evaluation report on the adequacy of station electric-distribution-system voltages for the Vermont Yankee Nuclear Power Station. Document No. 50-271  

SciTech Connect (OSTI)

This report documents the technical evaluation of the adequacy of the station electric distribution system voltages for the Vermont Yankee Nuclear Power Station. The evaluation is to determine if the onsite distribution system, in conjunction with the offsite power sources, has sufficient capacity to automatically start and operate all Class 1E loads within the equipment voltage ratings under certain conditions established by the Nuclear Regulatory Commission. The evaluation finds that the voltage analyses submitted demonstrate that adequate voltage will be supplied to the Class 1E equipment under worst case conditions.

Selan, J.C.

1982-09-03T23:59:59.000Z

126

Utility-Scale Solar Power Converter: Agile Direct Grid Connect Medium Voltage 4.7-13.8 kV Power Converter for PV Applications Utilizing Wide Band Gap Devices  

SciTech Connect (OSTI)

Solar ADEPT Project: Satcon is developing a compact, lightweight power conversion device that is capable of taking utility-scale solar power and outputting it directly into the electric utility grid at distribution voltage levels—eliminating the need for large transformers. Transformers “step up” the voltage of the power that is generated by a solar power system so it can be efficiently transported through transmission lines and eventually “stepped down” to usable voltages before it enters homes and businesses. Power companies step up the voltage because less electricity is lost along transmission lines when the voltage is high and current is low. Satcon’s new power conversion devices will eliminate these heavy transformers and connect a utility-scale solar power system directly to the grid. Satcon’s modular devices are designed to ensure reliability—if one device fails it can be bypassed and the system can continue to run.

None

2012-01-25T23:59:59.000Z

127

A SCR SWITCHED CAPACITOR VOLTAGE REGULATOR FOR 150 kV NEUTRAL BEAM POWER SUPPLY  

E-Print Network [OSTI]

2 ;;o c: REGULATOR BANK SCR TRIGGER CHASSIS BLOCK DIAGRAMLBL-8156 UC-20 A SCR SWITCHED CAPACITOR VOLTAGE REGULATORwill discharge through the SCR and the diodes. All of the

Milnes, K.A.

2011-01-01T23:59:59.000Z

128

AC Ward Leonard drive systems: Revisiting the four-quadrant operation of AC machines  

Science Journals Connector (OSTI)

Abstract In this paper, the problem of controlling the speed of AC machines in four quadrants is revisited from a completely new viewpoint, based on the idea of powering an AC machine with a synchronous generator that generates a variable-voltage–variable-frequency supply. This is a natural, mathematical, but not physical, extension of the conventional Ward Leonard drive systems for DC machines to AC machines. As a result, AC drives can be regarded as generator-motor systems, which facilitate the analysis of AC drives and the introduction of other special functions because a system consisting of a generator and a motor is easier to be handled than the conventional AC drive that consists of an inverter and a motor. Control strategies, with and without a speed sensor, are proposed to implement this idea and the experimental results are presented to demonstrate the feasibility.

Qing-Chang Zhong

2013-01-01T23:59:59.000Z

129

Optimal sizing and location of SVC devices for improvement of voltage profile in distribution network with dispersed photovoltaic and wind power plants  

Science Journals Connector (OSTI)

Abstract Intermittent power generation of wind turbines and photovoltaic plants creates voltage disturbances in power distribution networks which may not be acceptable to the consumers. To control the deviations of the nodal voltages, it is necessary to use fast dynamic control of the reactive power in the distribution network. Implementation of the power electronic devices, such as Static Var Compensator (SVC), enables effective dynamic state as well as a static state of the nodal voltage control in the distribution network. This paper analyzed optimal sizing and location of SVC devices by using genetic algorithm, to improve nodal voltages profile in a distribution network with dispersed photovoltaic and wind power plants. Practical application of the developed methodology was tested on an example of a real distribution network.

Aleksandar Savi?; Željko ?uriši?

2014-01-01T23:59:59.000Z

130

Wireless Electrical Power to Sub-millimeter Robots  

Science Journals Connector (OSTI)

A sub-millimeter scale coil is investigated as an alternative means to power electronics for small-scale robots. The AC voltage is induced by time-varying magnetic field. FEM analysis of employing magnetic fie...

Robert A. Nawrocki; Dominic R. Frutiger…

2012-01-01T23:59:59.000Z

131

Geomagnetically induced currents in the Uruguayan high-voltage power grid  

Science Journals Connector (OSTI)

......and uniform electric fields. IEEE Trans. Power Del. (1998) 13(4):1303-1308. Corbo...Geomagnetic disturbances and impacts upon power system operation. The Electric Power Engineering Handbook-Grigsby L.L., ed. (2007) 2nd edn......

R. Caraballo; L. Sánchez Bettucci; G. Tancredi

2013-01-01T23:59:59.000Z

132

Research on Low Voltage Ride through of Doubly-Fed Induction Generator Wind Power System  

Science Journals Connector (OSTI)

Due to the double fed induction generator’s(DFIG) advantage of controlling active and reactive power independently and partly power converter, DFIG is becoming a popular type of wind power generation system. However, the converter is quite sensitive ...

Yongfeng Ren; Hongyan Xu; Jianlin Li; Shuju Hu

2008-12-01T23:59:59.000Z

133

Operational Strategies for Battery Storage Systems in Low-voltage Distribution Grids to Limit the Feed-in Power of Roof-mounted Solar Power Systems  

Science Journals Connector (OSTI)

Abstract Due to the high amount of installed solar power systems in Germany, the low-voltage distribution grids reach their maximum capacities in periods of high insolation. In order to ensure a proper integration of today's and especially the prospective solar energy, grid reinforcement is a common method to increase the transmission capacity. As an alternative to this costly and intricate approach, local battery storage systems can be used to store the surplus generation and limit the feed-in power of the solar power systems. In this paper, two different operational strategies for battery storage systems together with solar power systems for self-consumption are presented and evaluated. Results show that the feed-in power can be distinctly reduced without generating significant losses for the system-owner.

Alexander Zeh; Rolf Witzmann

2014-01-01T23:59:59.000Z

134

Voltage Stability and Power Quality Issues of Wind Farm with Series Compensation  

E-Print Network [OSTI]

generator (DFIG) wind farms with series and shunt compensation are analyzed. The voltage source converter of a static synchronous compensator (STATCOM), the converter side of a DFIG and a load are considered-speed wind turbine (FSWT) and doubly-fed induction generator (DFIG) based wind farms. The expected number

Pota, Himanshu Roy

135

An earth-isolated optically coupled wideband high voltage probe powered by ambient light  

E-Print Network [OSTI]

(2012) Optimized working conditions for a thermoelectric generator as a topping cycle for gas turbines J (2012) Feasibility study in application of forging waste heat on absorption cooling system J. Renewable-emitting diode that converts high voltage into an amplitude-modulated optical signal, which is then conveyed

Bellan, Paul M.

136

Optimal Placement of Wind Generators in Medium Voltage Power Grids -- Investigations of Genetic Algorithm  

Science Journals Connector (OSTI)

The paper presents investigations of a genetic algorithm for computations of power losses in the MV power grid. In this case, the vector of start population PO0 and mutation likelihood was investigated. Diagrams of power losses in the grid dependent ... Keywords: genetic algorithm, wind generators, power grid, parallel processing, MPI

Andrzej Jordan; Carsten Maple; Ryszard Szczebiot; Lukasz Swierczewski

2011-04-01T23:59:59.000Z

137

AC Loss Measurements on a 2G YBCO Coil  

SciTech Connect (OSTI)

The Oak Ridge National Laboratory (ORNL) is collaborating with Waukesha Electric Systems (WES) to continue development of HTS power transformers. For compatibility with the existing power grid, a commercially viable HTS transformer will have to operate at high voltages in the range of 138 kV and above, and will have to withstand 550-kV impulse voltages as well. Second-generation (2G) YBCO coated conductors will be required for an economically-competitive design. In order to adequately size the refrigeration system for these transformers, the ac loss of these HTS coils must be characterized. Electrical AC loss measurements were conducted on a prototype high voltage (HV) coil with co-wound stainless steel at 60 Hz in a liquid nitrogen bath using a lock-in amplifier technique. The prototype HV coil consisted of 26 continuous (without splice) single pancake coils concentrically centered on a stainless steel former. For ac loss measurement purposes, voltage tap pairs were soldered across each set of two single pancake coils so that a total of 13 separate voltage measurements could be made across the entire length of the coil. AC loss measurements were taken as a function of ac excitation current. Results show that the loss is primarily concentrated at the ends of the coil where the operating fraction of critical current is the highest and show a distinct difference in current scaling of the losses between low current and high current regimes.

Rey, Christopher M [ORNL] [ORNL; Duckworth, Robert C [ORNL] [ORNL; Schwenterly, S W [ORNL] [ORNL

2011-01-01T23:59:59.000Z

138

Voltage quality behaviour of a wind turbine based Remote Area Power System  

Science Journals Connector (OSTI)

The power quality behaviour of a Remote Area Power System (RAPS) consisting of a Doubly Fed Induction Generator (DFIG), its main loads and a dummy load is presented in this paper. The dummy load is used to maintain the power balance of the system under ...

Nishad Mendis; Kashem M. Muttaqi; Sarath Perera

2009-02-01T23:59:59.000Z

139

Medium Voltage Overhead Power-line Broadband Communications; Transmission Capacity and Electromagnetic Interference  

E-Print Network [OSTI]

and Electromagnetic Interference P. Amirshahi and M. Kavehrad (FIEEE) The Pennsylvania State University, Department distribution networks for broadband power-line communications applications. Electromagnetic interference

Kavehrad, Mohsen

140

ANUEADflM-31 Electric Power High-Voltage Transmission Lines:  

Office of Scientific and Technical Information (OSTI)

formulated fluid that is kept under high pressure. This fluid helps to dissipate the power loss heat generated by the conductors. The construction costs in 1991 dollars for...

Note: This page contains sample records for the topic "ac power voltage" 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

RECIPIENT:Princeton Power Systems STATE: NJ PROJECT Marine High-Voltage Power Conditioning and Transmission System with Integrated Energy Storage  

Broader source: Energy.gov (indexed) [DOE]

Princeton Power Systems Princeton Power Systems STATE: NJ PROJECT Marine High-Voltage Power Conditioning and Transmission System with Integrated Energy Storage TITLE: Funding Opportunity Announcement Number Procurement Instrument Number NEPA Control Number cm Number DE-FOA-0000293 DE-EE0003640 GFO-000364~001 GOO Based on my review of the information concerning the proposed action, as NEPA Compliance Officer (authorized under DOE Order 451.1A), I have made the foUowing determination: CX, EA, EIS APPENDIX AND NUMBER: Description: A9 Information gathering (including, but not limited to, ~terature surveys, inventories, audits), data analysis (including computer modeling), document preparation (such as conceptual design or feasibility studies, analytical energy supply

142

Reliable, Efficient and Cost-Effective Electric Power Converter for Small Wind Turbines Based on AC-link Technology  

SciTech Connect (OSTI)

Grid-tied inverter power electronics have been an Achilles heel of the small wind industry, providing opportunity for new technologies to provide lower costs, greater efficiency, and improved reliability. The small wind turbine market is also moving towards the 50-100kW size range. The unique AC-link power conversion technology provides efficiency, reliability, and power quality advantages over existing technologies, and Princeton Power will adapt prototype designs used for industrial asynchronous motor control to a 50kW small wind turbine design.

Darren Hammell; Mark Holveck; DOE Project Officer - Keith Bennett

2006-08-01T23:59:59.000Z

143

Voltage Oscillations in Power Distribution Networks in the Presence of DFIGs and Induction Motor Loads  

E-Print Network [OSTI]

energy sources, wind power has proven to be one of the most successful sources offering relatively high-speed operation of wind tur- bines with frequency converters offers certain advantages [2]: mechanical stress penetration of wind power in traditional passive distribution networks requires detailed analysis to ensure

Pota, Himanshu Roy

144

Influence of the topology on the power flux of the Italian high-voltage electrical network  

E-Print Network [OSTI]

A model of the Italian 380 kV electrical transmission network has been analyzed under the topological and the functional viewpoints. The DC power flow model used to evaluate the power flux has been solved on the basis of input conditions (injected power - extracted power, line's reactances and the maximum flux capacity of each line) taken from real data. The vulnerability of the network under load conditions has been estimated by evaluating the power flux redistribution along the lines subsequent to line's removal. When the perturbed network cannot sustain a given input--output demand, the maximum power sustainable by the network has been evaluated to optimize the \\texttt{Quality of Service}, defined as the difference between the expected and the effective dispatched power. The functional relevance of the different lines of the network has been classified according to the amount of power that the network must reduce, to keep alive, upon their removal. Results show that topological and functional relevances ar...

Rosato, V; Gianese, G; Bologna, S

2009-01-01T23:59:59.000Z

145

Bulk Power System Dynamics and Control VI, August 22-27, 2004, Cortina d'Ampezzo, Italy Voltage Stability Enhancement via Model Predictive  

E-Print Network [OSTI]

Bulk Power System Dynamics and Control VI, August 22-27, 2004, Cortina d'Ampezzo, Italy Voltage of the North American power system in August 2003 could have been avoided by tripping a relatively small amount be more palatable. Recent advances in communications and computer systems facilitate such non-disruptive

Hiskens, Ian A.

146

Dynamic performance of a STATCON at an HVDC inverter feeding a very weak AC system  

SciTech Connect (OSTI)

This paper investigates the dynamic performance of the advanced static var compensator or STATCON at a high voltage direct current (HVDC) converter terminal where the ac system has a very low short circuit ratio (SCR). The STATCON is based on a nine-level GTO thyristor inverter. The studies include operating characteristics of the STATCON under various ac and dc disturbances. The simulation results are compared with other types of reactive power compensation options available for such applications. It is shown that the STATCON has clear advantages over the other compensators, in areas such as; fault response time, voltage support ability, and dc recovery, while operating with very weak ac systems.

Zhuang, Y.; Menzies, R.W. [Univ. of Manitoba, Winnipeg, Manitoba (Canada)] [Univ. of Manitoba, Winnipeg, Manitoba (Canada); Nayak, O.B. [HVDC Research Centre, Winnipeg, Manitoba (Canada)] [HVDC Research Centre, Winnipeg, Manitoba (Canada); Turanli, H.M. [Manitoba Hydro, Winnipeg, Manitoba (Canada)] [Manitoba Hydro, Winnipeg, Manitoba (Canada)

1996-04-01T23:59:59.000Z

147

Solar shield: forecasting and mitigating space weather effects on high-voltage power transmission systems  

Science Journals Connector (OSTI)

In this paper, central elements of the Solar Shield project, launched to design and establish ... about space weather conditions to the member power utilities. EPRI also evaluates the economic impacts of ... tran...

Antti Pulkkinen; Michael Hesse; Shahid Habib; Luke Van der Zel…

2010-05-01T23:59:59.000Z

148

Automatic voltage imbalance detector  

DOE Patents [OSTI]

A device for indicating and preventing damage to voltage cells such as galvanic cells and fuel cells connected in series by detecting sequential voltages and comparing these voltages to adjacent voltage cells. The device is implemented by using operational amplifiers and switching circuitry is provided by transistors. The device can be utilized in battery powered electric vehicles to prevent galvanic cell damage and also in series connected fuel cells to prevent fuel cell damage.

Bobbett, Ronald E. (Los Alamos, NM); McCormick, J. Byron (Los Alamos, NM); Kerwin, William J. (Tucson, AZ)

1984-01-01T23:59:59.000Z

149

E-Print Network 3.0 - ac railway power-line Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Information Sciences 17 MEASUREMENT AND ANALYSIS OF ELECTROMAGNETIC FIELDS FROM TRAMS, TRAINS AND HYBRID CARS Summary: (AC or DC). Railway safety signalling systems also use...

150

Abstract: Wind Energy Conversion Systems (WECS) produce fluctuating output power, which may cause voltage fluctuations and  

E-Print Network [OSTI]

Abstract: Wind Energy Conversion Systems (WECS) produce fluctuating output power, which may cause, solar energy conversion, virtual test bed simulation. Preprint Order Number: PE-531EC (02- plying its market-clearing mechanism. This mechanism determines the accepted and unaccepted energy bids

Gross, George

151

Supervisory hybrid model predictive control for voltage stability of power networks  

E-Print Network [OSTI]

on the predicted behavior of a model featuring hybrid dynamics of the loads and the generation system. I (via solar energy or wind energy installations) will start to feed electricity into the network [2 continuous dynamics and discrete events, i.e., power systems exhibit hybrid behavior. Components

Paris-Sud XI, Université de

152

Study of parallel AC and DC electrical distribution in the all-electric ship  

Science Journals Connector (OSTI)

Medium-voltage DC electrical distribution is envisioned as a possible system for the warship of the future, bringing numerous advantages including a very power-dense architecture. This system takes the AC power produced by generators, immediately rectifies ... Keywords: MVDC, electric-drive ship, electrical distribution

Julie S. Chalfant; Chryssostomos Chryssostomidis; Matthew G. Angle

2010-07-01T23:59:59.000Z

153

Wall-plug (AC) power consumption of a very high energy e+/e- storage ring collider  

E-Print Network [OSTI]

Estimated AC power consumption ranges from ~280 MW (1) to 416 MW (2) for a 350 GeV E_cm 80 km circumference colliding beam storage ring complex with parameters given in (1). The difference between the two estimates is from differing assumptions concerning heat removal, cryo-plant efficiency, klystron operation etc. The purpose of this note is to list and explain these. (1) Mike Koratzinos, et al, IPAC13 (2) Marc Ross, Higgs Quo Vadis Workshop, March 2013.

Ross, Marc C

2013-01-01T23:59:59.000Z

154

IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 17, NO. 4, OCTOBER 2002 1113 A Benchmark System for Digital Time-Domain  

E-Print Network [OSTI]

of power electronic-based apparatus at various voltage levels in electric energy systems is becoming in- creasingly widespread due to rapid progress in power electronic technology. The static synchronous that is well above the fundamental frequency of the ac supply. The capacitor voltage is at least equal

Lehn, Peter W.

155

Electrical power inverter having a phase modulated, twin-inverter, high frequency link and an energy storage module  

DOE Patents [OSTI]

The present invention provides an electrical power inverter method and apparatus, which includes a high frequency link, for converting DC power into AC power. Generally stated, the apparatus includes a first high frequency module which produces an AC voltage at a first output frequency, and a second high frequency inverter module which produces an AC voltage at a second output frequency that is substantially the same as the first output frequency. The second AC voltage is out of phase with the first AC voltage by a selected angular phase displacement. A mixer mixes the first and second output voltages to produce a high frequency carrier which has a selected base frequency impressed on the sidebands thereof. A rectifier rectifies the carrier, and a filter filters the rectified carrier. An output inverter inverts the filtered carrier to produce an AC line voltage at the selected base frequency. A phase modulator adjusts the relative angular phase displacement between the outputs of the first and second high frequency modules to control the base frequency and magnitude of the AC line voltage. 19 figs.

Pitel, I.J.

1987-02-03T23:59:59.000Z

156

Electrical power inverter having a phase modulated, twin-inverter, high frequency link and an energy storage module  

DOE Patents [OSTI]

The present invention provides an electrical power inverter method and apparatus, which includes a high frequency link, for converting DC power into AC power. Generally stated, the apparatus includes a first high frequency module which produces an AC voltage at a first output frequency, and a second high frequency inverter module which produces an AC voltage at a second output frequency that is substantially the same as the first output frequency. The second AC voltage is out of phase with the first AC voltage by a selected angular phase displacement. A mixer mixes the first and second output voltages to produce a high frequency carrier which has a selected base frequency impressed on the sidebands thereof. A rectifier rectifies the carrier, and a filter filters the rectified carrier. An output inverter inverts the filtered carrier to produce an AC line voltage at the selected base frequency. A phase modulator adjusts the relative angular phase displacement between the outputs of the first and second high frequency modules to control the base frequency and magnitude of the AC line voltage.

Pitel, Ira J. (Whippany, NJ)

1987-02-03T23:59:59.000Z

157

Scalable High-Power Redox Capacitors with Aligned Nanoforests of Crystalline MnO2 Nanorods by High Voltage Electrophoretic Deposition  

Science Journals Connector (OSTI)

Scalable High-Power Redox Capacitors with Aligned Nanoforests of Crystalline MnO2 Nanorods by High Voltage Electrophoretic Deposition ... The scalable nanomanufacturing process is demonstrated by roll-printing an aligned forest of ?-MnO2 nanorods on a large flexible substrate (1 inch by 1 foot). ...

Sunand Santhanagopalan; Anirudh Balram; Dennis Desheng Meng

2013-02-01T23:59:59.000Z

158

Ac loss reduction of multilayer superconducting power transmission cables by using narrow  

Science Journals Connector (OSTI)

The ac loss characteristics of coated conductors are dominated by the magnetic field component normal to their superconductor layer. Multilayer cables as well as monolayer cables consisting of 4 mm-wide coated conductors (named 4 mm cables) and those consisting of 2 mm-wide coated conductors (named 2 mm cables) were designed, and numerical electromagnetic field analyses were performed in their cross sections to calculate their ac losses. Trapezoidal lateral critical current density Jc distributions with shoulders as well as uniform ones were assumed in coated conductors for the analyses. The former models the degraded Jc near the edges of coated conductors. In the case of the monolayer, the calculated ac losses of the 2 mm cables were comparable to those of the 4 mm cables. In the cases of the multilayers, the calculated ac losses of the 2 mm cables were obviously less than those of the 4 mm cables. The degraded Jc near the edges of coated conductors more seriously affects the ac loss characteristics of the 2 mm cables than those of the 4 mm cables. However, even if we consider the influence of the degraded Jc near the edges of coated conductors, 2 mm-wide coated conductors are more profitable than 4 mm-wide coated conductors in multilayer cables from the viewpoint of ac loss reduction.

Naoyuki Amemiya; Quan Li; Kaoru Ito; Katsutoku Takeuchi; Taketsune Nakamura; Takeshi Okuma

2011-01-01T23:59:59.000Z

159

Voltage controlled stand-alone microhydro induction generator system  

Science Journals Connector (OSTI)

The paper discusses simulated control cases of the wound rotor self-excited induction generator WRSEIG. The generator external controller is designed to regulate the output voltage and frequency for constant or variable speed operation of the prime mover and has the inherent capability of protecting the load from short circuit, which permits voltage collapse under heavy loads. WRSEIG is self-excited using one set of excitation capacitance connected across the generator stator side. At the rotor side, a PWM controlled resistor is connected to the rotor windings through the rotating slips and act as a slip power controller. The controller can be configured to regulate the voltage as the speed or the load changes. The presented system has the capability to generate good quality AC power source with minimum controlling elements and can operate under constant or adjustable prime mover speed that suits many microhydro electricity-generating plants.

K.A. Nigim

2005-01-01T23:59:59.000Z

160

Boosting the voltage of a salinity-gradient-power electrochemical cell by means of complex-forming solutions  

E-Print Network [OSTI]

with respect to other well-known techniques that work quasi-reversibly, such as reverse electrodialysis luminance decay and voltage drift in polymer light-emitting electrochemical cells: Forward bias vs. reverse is significantly higher than the voltage obtained with the other quasi-reversible techniques. We show

Carati, Andrea

Note: This page contains sample records for the topic "ac power voltage" 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

A Stator-Voltage Decoupling Control Strategy for DFIG-based Wind Power Turbine Supplying Local Isolated Load  

Science Journals Connector (OSTI)

The performance of doubly fed induction generator (DFIG) based wind turbines supplying local isolated load is manly up to the stator-voltage control strategy. Compared with conventional steady mathematic model based one, a dynamic mathematic model based ... Keywords: dynamic model, supplying local isolated load, decoupling stator-voltage control, DFIG-based wind turbine

Long Zhan; Shuying Yang; Hui Gao

2012-10-01T23:59:59.000Z

162

CD54AC04, CD74AC04 HEX INVERTERS  

E-Print Network [OSTI]

°C to 125°C SOIC M Tube CD74AC04M AC04M­55°C to 125°C SOIC ­ M Tape and reel CD74AC04M96 AC04M CDIP-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance

Kretchmar, R. Matthew

163

Bonneville Power Administration is investigating wide-area stability and voltage control. The control provides a flexible  

E-Print Network [OSTI]

. There will also be synergy between wide-area control and substation automation (e.g., intelligent electronic Adminis- tration (BPA). For the past decade, wintertime voltage stability has been a major concern [1

Venkatasubramanian, Mani V.

164

A PC-PCL-based control system for the high-voltage pulsed-power operation of the Intense Diagnostic Neutral Beam (IDNB) Experiment  

SciTech Connect (OSTI)

A stand-alone, semiautomated control system for the high-voltage pulsed-power energy sources on the Intense Diagnostic Neutral Beam Experiment at Los Alamos National Laboratory using personal computer (PC) and programmable logic controller (PLC) technology has been developed and implemented. The control system, consisting of a PC with the graphic operator interface, the network connecting the PC to the PLC, the PLC, the PLC I/O modules, fiber-optic interfaces and software, is described.

Gribble, R.

1993-06-01T23:59:59.000Z

165

High-voltage engineering  

E-Print Network [OSTI]

High-voltage engineering covers the application, the useful use and proper working of high voltages and high fields. Here we give some introductory examples, i.e., ‘septa’ and ‘kicker’ at the Large Hadron Collider (14 TeV), the Super Proton Synchrotron (450 GeV) and the Proton Synchrotron (26 GeV) accelerators as found at the European Orginization for Nuclear Research (CERN) today. We briefly cover the theoretical foundation (Maxwell equations) and aspects of numerical field simulation methods. Concepts relating to electrical fields, insulation geometry and medium and breakdown are introduced. We discuss ways of generating high voltages with examples of AC sources (50/60 Hz), DC sources, and pulse sources. Insulation and breakdown in gases, liquids, solids and vacuum are presented, including Paschen’s law (breakdown field and streamer breakdown). Applications of the above are discussed, in particular the general application of a transformer. We briefly discuss measurement techniques of partial disch...

Gaxiola, E

2006-01-01T23:59:59.000Z

166

Reactive Power Compensation Technologies, State-of-the-Art Review  

E-Print Network [OSTI]

at all levels of power transmission, it improves HVDC (High Voltage Direct Current) conversion terminal performance, increases transmission efficiency, controls steady-state and temporary overvoltages [4], and can the performance of the overall ac power system. Traditionally, rotating synchronous condensers and fixed

Catholic University of Chile (Universidad CatĂłlica de Chile)

167

650 IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 26, NO. 2, APRIL 2011 Hourly Scheduling of DC Transmission Lines in  

E-Print Network [OSTI]

Transmission Lines in SCUC With Voltage Source Converters Azim Lotfjou, Mohammad Shahidehpour, Fellow, IEEE transmission lines, se- curity-constrained unit commitment, voltage-source converters. NOMENCLATURE Index of ac;LOTFJOU et al.: HOURLY SCHEDULING OF DC TRANSMISSION LINES 651 , Vector of real and reactive power

Fu, Yong

168

Power-One produces the industry's broadest selection of linear power supplies with output voltages from 5 volts through 250 volts. Rugged  

E-Print Network [OSTI]

-A 5V @ 9A (Note 1,5) N 5V HD5-12/OVP-A 5V @ 12A (Note 1,5) D HE5-18/OVP-A 5V @ 18A (Note 1,5) E F5 regulatory standards, and is CE Marked to the Low Voltage Directive (LVD). INTERNATIONAL SERIES LINEARS marked to Low Voltage Directive · 100% Burn-In · 2 Year Warranty · Overvoltage Protection (OVP) Standard

Berns, Hans-Gerd

169

Low electrical potential anode modified with Fe/ferric oxide and its application in marine benthic microbial fuel cell with higher voltage and power output  

Science Journals Connector (OSTI)

Abstract Low voltage and power output limit the widespread application of marine benthic microbial fuel cell (BMFCs). To increase the cell power, a Fe/Ferric oxide modified anode fabricating by electrolytic deposition is reported here. The novel anode has a lower surface contact angle and higher wettability, which favors the adhesion of bacteria. It is firstly demonstrated that the electrical potential of the modified anode is about ?775 mV, much lower than that of the plain graphite (about ?450 mV). Open circuit potential of BMFC with the modified anode is about 1050 ± 50 mV, while the potential for the plain cells is only 700 ± 50 mV. In comparison with the plain graphite, the modified anode presents a 393-fold exchange current density and a higher kinetic activity. The output power reaches 7.4 × 10?2 mW cm?2, 17.4-fold higher than that of the plain graphite. A composite mechanism of both chemical and microbial enhancement of the modified anode is proposed to explain its excellent electrochemical performance. The modified anode has potential for high-power output cell and novel voltage-booster design to make the BMFC utilization feasibility.

Yubin Fu; Qian Xu; Xuerong Zai; Yuanyuan Liu; Zhikai Lu

2014-01-01T23:59:59.000Z

170

E-Print Network 3.0 - ac metal-enclosed switchgear Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Anne 2011 Prsente devant Summary: -design; Transmission System; Life Cycle Assessment (LCA); 765 kV AC; 1000 kV AC; Ultra High Voltage; Extra High Voltage... Acidification AAC...

171

Architectures and circuits for low-voltage energy conversion and applications in renewable energy and power management  

E-Print Network [OSTI]

In this thesis we seek to develop smaller, less expensive, and more efficient power electronics. We also investigate emerging applications where the proper implementation of these new types of power converters can have a ...

Pilawa-Podgurski, Robert C. N

2012-01-01T23:59:59.000Z

172

Silicon-on-insulator-based high-voltage, high-temperature integrated circuit gate driver for silicon carbide-based power field effect transistors  

SciTech Connect (OSTI)

Silicon carbide (SiC)-based field effect transistors (FETs) are gaining popularity as switching elements in power electronic circuits designed for high-temperature environments like hybrid electric vehicle, aircraft, well logging, geothermal power generation etc. Like any other power switches, SiC-based power devices also need gate driver circuits to interface them with the logic units. The placement of the gate driver circuit next to the power switch is optimal for minimising system complexity. Successful operation of the gate driver circuit in a harsh environment, especially with minimal or no heat sink and without liquid cooling, can increase the power-to-volume ratio as well as the power-to-weight ratio for power conversion modules such as a DC-DC converter, inverter etc. A silicon-on-insulator (SOI)-based high-voltage, high-temperature integrated circuit (IC) gate driver for SiC power FETs has been designed and fabricated using a commercially available 0.8--m, 2-poly and 3-metal bipolar-complementary metal oxide semiconductor (CMOS)-double diffused metal oxide semiconductor (DMOS) process. The prototype circuit-s maximum gate drive supply can be 40-V with peak 2.3-A sourcing/sinking current driving capability. Owing to the wide driving range, this gate driver IC can be used to drive a wide variety of SiC FET switches (both normally OFF metal oxide semiconductor field effect transistor (MOSFET) and normally ON junction field effect transistor (JFET)). The switching frequency is 20-kHz and the duty cycle can be varied from 0 to 100-. The circuit has been successfully tested with SiC power MOSFETs and JFETs without any heat sink and cooling mechanism. During these tests, SiC switches were kept at room temperature and ambient temperature of the driver circuit was increased to 200-C. The circuit underwent numerous temperature cycles with negligible performance degradation.

Tolbert, Leon M [ORNL; Huque, Mohammad A [ORNL; Blalock, Benjamin J [ORNL; Islam, Syed K [ORNL

2010-01-01T23:59:59.000Z

173

Distribution System Voltage Performance Analysis for High-Penetration Photovoltaics  

SciTech Connect (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

174

E-Print Network 3.0 - ac input power Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

factor with high total harmonic... input cur- rent shape at near unity power factor. Advantages of the proposed topology are: no dc... as well as input supply variations. Matrix...

175

A Partitioning Approach for Parallel Simulation of AC-Radial Shipboard Power Systems  

E-Print Network [OSTI]

be used. That is, a transmission line of sufficient physical length must exist in order to partition power systems. If said line does not exist in the power system being modeled, short-lines (stublines [27]) with one time step delay can be used... the electrical network equations using modified nodal analysis, use Bergeron?s travelling-wave transmission line model to create subsystems, and to parallelize the simulation using a distributed computer. In this work, an SPS was formulated using loop...

Uriarte, Fabian Marcel

2011-08-08T23:59:59.000Z

176

North American Power Symposium NAPS, Cleveland, Ohio, October 1998, pp. 294 299. Fundamental Frequency Model of Uni ed Power Flow Controller  

E-Print Network [OSTI]

. The two main objectives of FACTS are to increase the transmission ca- pacity of ac lines and control power ow over designated transmission routes. The improvements in the eld of power electronics have had Capacitor TCSC, as it permits a change in the impedance of the transmission line through a voltage source

Cañizares, Claudio A.

177

CD54AC08, CD74AC08 QUADRUPLE 2-INPUT POSITIVE-AND GATES  

E-Print Network [OSTI]

SOIC M Tube CD74AC08M AC08M­55°C to 125°C SOIC ­ M Tape and reel CD74AC08M96 AC08M CDIP ­ F Tube CD54AC-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance

Kretchmar, R. Matthew

178

Low-voltage gyrotrons  

SciTech Connect (OSTI)

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

179

Definition: Automated Voltage Regulators | Open Energy Information  

Open Energy Info (EERE)

Regulators Regulators Jump to: navigation, search Dictionary.png Automated Voltage Regulators Voltage regulators are transformers that can increase or decrease the voltage on a distribution circuit to help keep the voltage within a pre-determined band. Unlike capacitor banks, voltage regulators cannot adjust power factor. These devices typically monitor the voltage at the location where they are connected, and compare it to a programmed set point. If the voltage deviates too far from the set point, the voltage regulator can increase or decrease its output voltage by moving the tap on the secondary side up or down. An automated voltage regulator can operate with remote control signals, or in concert with other area voltage control devices, to help regulate distribution voltage in a coordinated fashion.

180

Lurching towards markets for power: China's electricity policy 19852007 Xiaoli Zhao a,c,  

E-Print Network [OSTI]

of electricity prices and investment incentives. We argue that the gov- ernance reforms successfully ended tremendously. Meanwhile, the electricity price reform in 1996 promoted power generation corporations more responsive to electricity demand and price signals to some extend. However, it cannot be proved

Lyon, Thomas P.

Note: This page contains sample records for the topic "ac power voltage" 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

Minimum Cost Operation Mode and Minimum Loss Operation Mode of Power System – Operation Mode Selection Based on Voltage Stability  

Science Journals Connector (OSTI)

Two formulae – an optimal P-Q generation formula for minimum system cost and an optimal MW allocation formula for minimum system loss – are described in this paper. The author defines two kinds of power system operation

Sang-Joong Lee

2006-01-01T23:59:59.000Z

182

432 IEEE TRANSACTIONS ON EDUCATION, VOL. 49, NO. 4, NOVEMBER 2006 Voltage Stability Toolbox for Power System  

E-Print Network [OSTI]

the fundamentals of power system modeling together with di- verse mathematical formulations of bifurcation theory of Electrical and Electronics Engineering, College of Engineering, Nigde University, Nigde, 51200, Turkey (e

Kwatny, Harry G.

183

AC and lightning performance of fiberglass crossarms aged in 115 kV transmission line  

SciTech Connect (OSTI)

This paper presents the results of an investigation of the electrical performance of 115 kV transmission line fiberglass cross-arm used by Mississippi Power and Light Company. A transmission line fiberglass crossarm removed from service and companion cross-arms outdoors but not in service were examined. The evaluation of electrical performance was based on flashover voltage value at AC voltage and standard lightning impulses as well as under dry and wet conditions. The tests were performed in the Mississippi State University High Voltage Laboratory. The obtained flashover voltages show no large differences in electrical strength of fiberglass crossarms removed from service and those stored outdoors. The Added CFO voltage by fiberglass crossarm to the porcelain suspension insulators is presented versus the length of the fiberglass crossarm for dry and wet conditions.

Grzybowski, S. (Mississippi State Univ., Mississippi State, MS (United States). Dept. of Electrical and Computer Engineering); Jenkins, E.B. (Entergy, New Orleans, LA (United States). Generation and Transmission Group)

1993-10-01T23:59:59.000Z

184

A power regulator for the generators on the A.C. network calculator  

E-Print Network [OSTI]

, is gratefully acknowledged. It was with the help of these men end other members of the teaching staff of the Electrical Engineering Department, that this device was developed. TABLE OF CONTENTS CHAPTER I. THE PROBLEM AND DEFINITION OF TERMS II . THE RELAY... for an Ideal Servo 2. Time Delay Diagram for an Actual Servo 3. The Restoring Force - Error Diagram of an Ideal PACE Servomechanism 4. The Restoring Porce - Error Diagram of a Relay Servomechanism Having a Dead Zone 5. Block Diagram of the Power...

Francis, Lawrence Gregg

2012-06-07T23:59:59.000Z

185

EVSE Features Power Button for Zero Consumption Auto-restart  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Button for Zero Consumption Auto-restart Button for Zero Consumption Auto-restart Multi Colored Charge Indicator Led Power Indicator EVSE Specifications Grid connection Plug and cord NEMA 6-50 Connector type J1772 Test lab certifications ETL Listed Approximate size (H x W x D inches) 16 x 24 x 6 Charge level AC Level 2 Input voltage 208-240 VAC Maximum input current 30 Amp Circuit breaker rating 40 Amp Test Conditions 1 Test date 10/29/2012 Nominal supply voltage (Vrms) 208.38 Supply frequency (Hz) 59.99 Initial ambient temperature (°F) 64 Test Vehicle 1,3 Make and model 2012 Chevrolet Volt Battery type Li-ion Steady state charge power (AC kW) 3.07 Maximum charge power (AC kW) 3.32 EVSE Test Results

186

Ancillary service details: Voltage control  

SciTech Connect (OSTI)

Voltage control is accomplished by managing reactive power on an alternating-current power system. Reactive power can be produced and absorbed by both generation and transmission equipment. Reactive-power devices differ substantially in the magnitude and speed of response and in their capital costs. System operators, transmission owners, generators, customers, power marketers, and government regulators need to pay close attention to voltage control as they restructure the U.S. electricity industry. Voltage control can affect reliability and commerce in three ways: (1) Voltages must be maintained within an acceptable range for both customer and power-system equipment to function properly. (2) The movement of reactive power consumes transmission resources, which limits the ability to move real power and worsens congestion. (3) The movement of reactive power results in real-power losses. When generators are required to supply excessive amounts of reactive power, their real-power production must be curtailed. These opportunity costs are not currently compensated for in most regions. Current tariffs are based on embedded costs. These embedded-cost tariffs average about $0.51/MWh, equivalent to $1.5 billion annually for the United States as a whole. Although this cost is low when compared with the cost of energy, it still aggregates to a significant amount of money. This report takes a basic look at why the power system requires reactive power (an appendix explains the fundamentals of real and reactive power). The report then examines the various types of generation and transmission resources used to supply reactive power and to control voltage. Finally it discusses how these resources are deployed and paid for in several reliability regions around the country. As the U.S. electricity industry is restructured, the generation, transmission, and system-control equipment and functions that maintain voltages within the appropriate ranges are being deintegrated.

Kirby, B.; Hirst, E.

1997-12-01T23:59:59.000Z

187

Modeling of the Voltage Waves in the LHC Main Dipole Circuits  

E-Print Network [OSTI]

When a fast power abort is triggered in the LHC main dipole chain, voltage transients are generated at the output of the power converter and across the energy-extraction switches. The voltage waves propagate through the chain of 154 superconducting dipoles and can have undesired effects leading to spurious triggering of the quench protection system and firing of the quench heaters. The phase velocity of the waves travelling along the chain changes due to the inhomogeneous AC behavior of the dipoles. Furthermore, complex phenomena of reflection and superposition are present in the circuit. For these reasons analytical calculations are not sufficient for properly analyzing the circuit behavior after a fast power abort. The transients following the switch-off of the power converter and the opening of the switches are analyzed by means of a complete electrical model, developed with the Cadence© suite (PSpice© based). The model comprises all the electrical components of the circuit, additional components simula...

Ravaioli, E; Formenti, F; Steckert, J; Thiesen, H; Verweij, A

2012-01-01T23:59:59.000Z

188

On-line partial discharge monitoring system and data processing using WTST-NST filter for high voltage power cable  

Science Journals Connector (OSTI)

Defects inside insulation of HV XLPE cable accessories can lead to partial discharge (PD) activity. When PD activity happens, leakage current may flow through the grounded line. To acquire the PD current signal, one practicable and effective method is ... Keywords: MRD-MRR algorithm, adaptive WTST-NST filter, condition based maintenance(CBM), on-line monitoring, partial discharge, power cable, stationary noise interference

Hui Wang; Chengjun Huang; Li Zhang; Yong Qian; Junhua Liu; Linpeng Yao; Canxin Guo; Xiuchen Jiang

2009-07-01T23:59:59.000Z

189

Multimode power processor  

DOE Patents [OSTI]

In one embodiment, a power processor which operates in three modes: an inverter mode wherein power is delivered from a battery to an AC power grid or load; a battery charger mode wherein the battery is charged by a generator; and a parallel mode wherein the generator supplies power to the AC power grid or load in parallel with the battery. In the parallel mode, the system adapts to arbitrary non-linear loads. The power processor may operate on a per-phase basis wherein the load may be synthetically transferred from one phase to another by way of a bumpless transfer which causes no interruption of power to the load when transferring energy sources. Voltage transients and frequency transients delivered to the load when switching between the generator and battery sources are minimized, thereby providing an uninterruptible power supply. The power processor may be used as part of a hybrid electrical power source system which may contain, in one embodiment, a photovoltaic array, diesel engine, and battery power sources.

O'Sullivan, George A. (Pottersville, NJ); O'Sullivan, Joseph A. (St. Louis, MO)

1999-01-01T23:59:59.000Z

190

Analysis of three-phase rectifiers with constant-voltage loads  

E-Print Network [OSTI]

This work presents a quantitative analysis of the operating characteristics of three-phase diode bridge rectifiers with AC-side reactance and constant-voltage loads. We focus on the case where the AC-side currents vary ...

Caliskan, Vahe

191

EVSE Features Charge Delay Option Power Light Indicator Eight-segment Progress Indicator Auto-restart  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Charge Delay Option Power Light Indicator Charge Delay Option Power Light Indicator Eight-segment Progress Indicator Auto-restart EVSE Specifications Grid connection Plug and cord NEMA 6-50 Connector type J1772 Test lab certifications UL Listed Approximate size (H x W x D inches) 10 x 13 x 4 Charge level AC Level 2 Input voltage 240 VAC Maximum input current 30 Amp Circuit breaker rating 40 Amp Test Conditions 1 Test date 10/30/2012 Nominal supply voltage (Vrms) 209.04 Supply frequency (Hz) 59.99 Initial ambient temperature (°F) 64 Test Vehicle 1,3 Make and model 2012 Chevrolet Volt Battery type Li-ion Steady state charge power (AC kW) 3.09 Maximum charge power (AC kW) 3.20 EVSE Test Results 1,2,4

192

Dynamic voltage-current characteristics for a water jet plasma arc  

SciTech Connect (OSTI)

A virtual instrument technology is used to measure arc current, arc voltage, dynamic V-I characteristics, and nonlinear conductance for a cone-shaped water jet plasma arc under ac voltage. Experimental results show that ac arc discharge mainly happens in water vapor evaporated from water when heated. However, due to water's cooling effect and its conductance, arc conductance, reignition voltage, extinguish voltage, and current zero time are very different from those for ac arc discharge in gas work fluid. These can be valuable to further studies on mechanism and characteristics of plasma ac discharge in water, and even in gas work fluid.

Yang Jiaxiang; Lan Sheng; Xu Zuoming [College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, Heilongjiang 150040 (China)

2008-05-05T23:59:59.000Z

193

CD54AC02, CD74AC02 QUADRUPLE 2-INPUT POSITIVE-NOR GATES  

E-Print Network [OSTI]

to 125°C SOIC ­ M Tape and reel CD74AC02M96 AC02M CDIP ­ F Tube CD54AC02F3A CD54AC02F3A Package drawings-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance

Kretchmar, R. Matthew

194

CD54AC32, CD74AC32 QUADRUPLE 2-INPUT POSITIVE-OR GATES  

E-Print Network [OSTI]

Tape and reel CD74AC32M96 AC32M CDIP ­ F Tube CD54AC32F3A CD54AC32F3A Package drawings, standard-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance

Kretchmar, R. Matthew

195

Data:25fc8909-2275-4619-b587-6ea6033ac21f | Open Energy Information  

Open Energy Info (EERE)

909-2275-4619-b587-6ea6033ac21f 909-2275-4619-b587-6ea6033ac21f No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of Plymouth, Wisconsin (Utility Company) Effective date: 2011/12/22 End date if known: Rate name: Cp-1 Small Power Service Secondary Voltage Service Sector: Industrial Description: Power Cost Adjustment Clause - All metered rates shall be subject to a positive or negative power cost adjustment charge equivalent to the amount by which the current cost of power (per kilowatt-hour of sales) is greater or lesser than the base cost of power purchased (per kilowatt-hour of sales). The base cost of power (U) is $0.0774 per kilowatt-hour.

196

A Fuzzy Logic Based Power Electronic System for Wind Energy Conversion Scheme  

Science Journals Connector (OSTI)

This paper used fuzzy logic theory to study the behavior of a simple pulse width modulated three phase voltage controlled VSI, which feeds a weak ac network with power produced from an offshore wind farm (WF) of induction generators. Its control system, ...

Lata Gidwani; Rajesh Kumar

2007-12-01T23:59:59.000Z

197

A Stator-Voltage Decoupling Control Strategy for No-Load Cutting-in Process of DFIG-based Wind Power Turbines  

Science Journals Connector (OSTI)

The performance of no-load cutting-in process is manly up to the stator-voltage control strategy for doubly fed induction generator (DFIG) based wind turbines. Compared with conventional steady mathematic model based one, a dynamic mathematic model based ... Keywords: dynamic model, no-load cutting-in process decoupling stator-voltage control, DFIG-based wind turbine

Shuying Yang; Long Zhan; Xing Zhang

2012-07-01T23:59:59.000Z

198

Active and reactive power ripple minimization in direct power control of matrix converter-fed DFIG  

Science Journals Connector (OSTI)

Abstract Despite the advantages of matrix converters (MCs) compared with standard voltage source converters (VSCs), all of the direct power control (DPC) strategies for doubly fed induction generator (DFIG) reported in the literature, only utilize VSCs. In this paper, the influence of MC voltage vectors on active and reactive powers variation is investigated. Compared with VSCs, \\{MCs\\} generate higher number of voltage vectors. Using this inherent advantage of MC, the main contribution of this paper is to reduce large active and reactive power ripples which is one of the main drawbacks of conventional DPC method. Utilizing a wide range of voltage vectors with different amplitudes, a new switching table is derived which using this table, not only large power ripple is compensated but also, a close to unity input power factor for MC can be achieved. In the other word, the presented scheme adds the advantages of MC and DPC together. Moreover, Owing to the operation of MC in direct ac–ac form, the presented scheme effectively eliminates the need for the grid side converter used in conventional DPC, which has a complicated control method is eliminated. Simulation results show the effectiveness of the proposed method and have a reasonable correspondence with theoretical and mathematical analysis.

Arjang Yousefi-Talouki; Edris Pouresmaeil; Bo Nřrregaard Jřrgensen

2014-01-01T23:59:59.000Z

199

Microsoft PowerPoint - [5] Le Tang - ABB Presentation at DOE HVDC Workshop  

Broader source: Energy.gov (indexed) [DOE]

HVDC Technologies & ABB Experience HVDC Technologies & ABB Experience DOE Workshop - Applications for High-Voltage Direct Current Transmission Technologies Le Tang, ABB , April 22, 2013 In cable > 50 km (>30 miles), most of AC current is needed to charge and discharge In overhead lines > 200 km (>120 miles), most of AC voltage is needed to G G load I C = ωCU 0 U L = ωLI 0 I 0 U 0 I = I 0 - I C U=U 0 -U L Cable Overhead Line C load L Why is DC important in the Transmission Grid ? Capacitance and Inductance of Power Line © ABB Group April 22, 2013 | Slide 2 current is needed to charge and discharge the "C" (capacitance) of the cable most of AC voltage is needed to overcome the "L" (inductance) of the line ⇒ C& L can be compensated by reactors/capacitors or FACTS ⇒ or by use of DC, which means

200

Development and Verification of Control and Protection Strategies in Hybrid AC/DC Power Systems for Smart Grid Applications.  

E-Print Network [OSTI]

?? Modern power networks incorporate communications and information technology infrastructure into the electrical power system to create a smart grid in terms of control and… (more)

Salehi Pour Mehr, Vahid

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ac power voltage" 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

Non-contact current and voltage sensor  

DOE Patents [OSTI]

A detachable current and voltage sensor provides an isolated and convenient device to measure current passing through a conductor such as an AC branch circuit wire, as well as providing an indication of an electrostatic potential on the wire, which can be used to indicate the phase of the voltage on the wire, and optionally a magnitude of the voltage. The device includes a housing that contains the current and voltage sensors, which may be a ferrite cylinder with a hall effect sensor disposed in a gap along the circumference to measure current, or alternative a winding provided through the cylinder along its axis and a capacitive plate or wire disposed adjacent to, or within, the ferrite cylinder to provide the indication of the voltage.

Carpenter, Gary D; El-Essawy, Wael; Ferreira, Alexandre Peixoto; Keller, Thomas Walter; Rubio, Juan C; Schappert, Michael A

2014-03-25T23:59:59.000Z

202

Microsoft PowerPoint - [2] Nari Hingorani Slides - HVDC Workshop April 2013  

Broader source: Energy.gov (indexed) [DOE]

Energy's Grid Tech Team Energy's Grid Tech Team Workshop Applications for High Voltage Direct Current (HVDC) Transmission Technologies April 22, 2013 NRECA Conference Center NRECA Conference Center Arlington, VA 22203 Keynote Speaker: Nari Hingorani HVDC Overview Today's HVDC * Power System in general has to be AC, because there is no DC Transformers * Therefore Today's HVDC involves conversion of AC to DC and back to AC * To justify HVDC, there needs to be enough cost or performance benefit to pay for the converters. Hingorani Applications for HVDC * Moving large amounts of power over long distances. * Moving power by cable over moderate to long * Moving power by cable over moderate to long distances. * Moving power between asynchronous systems. * Forcing ordered power into an area Hingorani

203

Total compensation of line-side switching harmonics in converter-fed ac locomotives  

SciTech Connect (OSTI)

PWM controlled line-side converters of modern ac traction locomotives inject harmonic currents into the feeding overhead line. This causes problems of electromagnetic interference. Passive or active filters are usually provided for a partial reduction of the line harmonics. A novel and superior approach employs a switched electronic compensator. It generates an exact replica of the harmonic current, feeding it to the high-voltage transformer to produce a harmonic counter MMF. The transformer main flux is then forced to be sinusoidal, and so is the induced voltage in the primary. The line current, being low-pass filtered by the transformer leakage inductance, assumes a pure sinusoidal waveform. The compensator operates in the low switching frequency range of the main power converters. Its installed power is only 1% of the traction power. Operation, control, and design considerations are described. Results from laboratory tests at full power level are presented.

Krah, J.O.; Holtz, J. [Univ. of Wuppertal (Germany)] [Univ. of Wuppertal (Germany)

1995-11-01T23:59:59.000Z

204

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

205

Data:82669655-9455-4500-a883-ac345410ec12 | Open Energy Information  

Open Energy Info (EERE)

9455-4500-a883-ac345410ec12 9455-4500-a883-ac345410ec12 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Delmarva Power Effective date: 2013/06/01 End date if known: Rate name: OL "HPS" 50 Watt (Enclosed) (Existing) 21 kW Sector: Lighting Description: Source or reference: http://www.delmarva.com/_res/documents/DEMasterTariff.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous

206

Data:Cfaffcba-fd5c-47fc-9e02-8ac4521daa78 | Open Energy Information  

Open Energy Info (EERE)

Cfaffcba-fd5c-47fc-9e02-8ac4521daa78 Cfaffcba-fd5c-47fc-9e02-8ac4521daa78 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Southeastern Power Admin Effective date: End date if known: Rate name: Wholesale Power Rate Schedule CP&L-3-B Sector: Commercial Description: Source or reference: http://199.44.84.82/files/CP&L-3-B.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >>

207

Abstract--The increase in use of power electronics in transmission and distribution applications is the driving  

E-Print Network [OSTI]

is the driving force for development of high power devices. Utility applications like FACTS and HVDC require cost and compared for SiC and Si devices. These loss models are integrated with an HVDC transmission system to study of the systems. High Voltage DC (HVDC) transmission and Flexible AC Transmission Systems (FACTS) are the widely

Tolbert, Leon M.

208

E-Print Network 3.0 - ac transmission lines Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

lines Search Powered by Explorit Topic List Advanced Search Sample search results for: ac transmission lines...

209

E-Print Network 3.0 - ac transmission line Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

line Search Powered by Explorit Topic List Advanced Search Sample search results for: ac transmission line...

210

AC resistance measuring instrument  

DOE Patents [OSTI]

An auto-ranging AC resistance measuring instrument for remote measurement of the resistance of an electrical device or circuit connected to the instrument includes a signal generator which generates an AC excitation signal for application to a load, including the device and the transmission line, a monitoring circuit which provides a digitally encoded signal representing the voltage across the load, and a microprocessor which operates under program control to provide an auto-ranging function by which range resistance is connected in circuit with the load to limit the load voltage to an acceptable range for the instrument, and an auto-compensating function by which compensating capacitance is connected in shunt with the range resistance to compensate for the effects of line capacitance. After the auto-ranging and auto-compensation functions are complete, the microprocessor calculates the resistance of the load from the selected range resistance, the excitation signal, and the load voltage signal, and displays of the measured resistance on a digital display of the instrument. 8 figs.

Hof, P.J.

1983-10-04T23:59:59.000Z

211

Application of GTO voltage source inverter in a hybrid HVDC link  

SciTech Connect (OSTI)

This paper investigates the application of a GTO voltage source inverter in a two-terminal HVdc link, which is fed at the sending end by a line-commutated rectifier. This type of HVdc link may be applied when power transfer is predominantly unidirectional, especially to a weak ac system. The investigations are based on analytical studies and digital time-domain simulations with the Electro-Magnetic Transient program for DC systems (EMTDC). Control method and protection requirements are studied, together with dynamic behavior of the system following disturbances, e.g. dc fault, ac fault, start-up etc. The studies are aimed at exhibiting the technical feasibility of the proposed HVdc scheme. Need for further studies is pointed out when necessary.

Zhao, Z.; Iravani, M.R. (Univ. of Toronto, Ontario (Canada). Dept. of Electrical Engineering)

1994-01-01T23:59:59.000Z

212

Classification of Voltage Sags Based on MPCA Models  

Science Journals Connector (OSTI)

In this paper, we introduce a new framework for classification of short duration voltage reductions in the area of Power Quality Monitoring using Multiway Principal Component Analysis (MPCA). Firstly, we recast the sags occurred in High Voltage (HV) ...

Abbas Khosravi; Joaquim Melendez; Joan Colomer

2007-06-01T23:59:59.000Z

213

NREL: Measurements and Characterization - Current Versus Voltage  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Current Versus Voltage Current Versus Voltage The National Renewable Energy Laboratory (NREL) Device Performance group uses current versus voltage (I-V) measurement systems to assess the main performance parameters for photovoltaic (PV) cells and modules. I-V measurement systems determine the output performance of devices, including: open-circuit voltage (Voc), short-circuit current (Isc), fill factor (FF), maximum power output of the device (Pmax), voltage at maximum power (Vmax), current at maximum power (Imax), and conversion efficiency of the device (η). Some I-V systems may also be used to perform dark I-V measurements to determine diode properties and series and shunt resistances. We use three I-V systems to measure performance of individual PV cells; and four for modules - two for measurements under simulated conditions; and

214

Alternative Fuels at AC Transit  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Alternative Fuels at AC Transit Alternative Fuels at AC Transit Speaker(s): Jaimie Levin Date: November 1, 2011 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Eve Edelson Mr. Levin will discuss AC Transit's range of environmental technology initiatives, including: zero emission fuel cell transit buses; state-of-the-art, high-capacity, hydrogen fueling stations; solar energy systems; and stationary solid oxide fuel cell power generators. AC Transit has the largest fleet of fuel cell buses in the United States, featuring fuel cell systems with more than 10,000 hours of continuous operation without any failures or power degradation. Their fuel cell fleet has logged more than 400,000 miles of service and carried in excess of one million passengers. Come hear what AC Transit has learned, where they're headed,

215

252 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 39, NO. 1, JANUARY 2004 A CMOS Subbandgap Reference Circuit With 1-V Power Supply Voltage  

E-Print Network [OSTI]

252 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 39, NO. 1, JANUARY 2004 A CMOS Subbandgap Reference management circuits [1]. As process technologies go into the deep-submicron eras and the demand for battery) as well as design margin. To keep pace with supply voltage requirements of a state-of-the-art CMOS process

Ayers, Joseph

216

Development of High Voltage Electron Microscope  

Science Journals Connector (OSTI)

......Cockcroft Walton Type High Voltage Generator. O Power Line O Fig. 4...pressure in the tank to the atmospheric pressure by removing freon...pump using liquid nitrogen. Water buffer and liquid nitrogen...base plate of high voltage generator. Four poles stand on this......

Shinjiro KATAGIRI; Hirokazu KIMURA; Susumu OZASA; Kazumi SHIRAISHI

1969-01-01T23:59:59.000Z

217

6 - Control systems for AC variable speed drives  

Science Journals Connector (OSTI)

Publisher Summary This chapter explores the control system, embodied in the control circuits. The simplest method of providing auxiliary power to the converter control circuits is from an auxiliary transformer connected to the mains. The primary need for current feedback in general purpose variable speed drives (VSDs) is inverter switching device protection. Various disadvantages of the vector controlled AC drive as compared to a DC drive are discussed in the chapter. The strategy of an AC vector control drive is to calculate the individual current vectors to eventually enable separate control of the flux current and the torque current under all speed and load conditions. The power circuit for a vector converter is almost identical to that used by a variable voltage variable frequency (VVVF) drive. High accuracy motor current feedback is also necessary to provide control of motor torque. DC bus current feedback is suitable for switching device protection and current limiting in most AC VSDs. Analog speed transducers are increasingly being replaced by digital devices, which are more compatible with modern digital control systems.

Malcolm Barnes

2003-01-01T23:59:59.000Z

218

Definition: Reactive Power | Open Energy Information  

Open Energy Info (EERE)

Reactive Power Reactive Power Jump to: navigation, search Dictionary.png Reactive Power The portion of electricity that establishes and sustains the electric and magnetic fields of alternating-current equipment. Reactive power must be supplied to most types of magnetic equipment, such as motors and transformers. It also must supply the reactive losses on transmission facilities. Reactive power is provided by generators, synchronous condensers, or electrostatic equipment such as capacitors and directly influences electric system voltage. It is usually expressed in kilovars (kvar) or megavars (Mvar).[1] View on Wikipedia Wikipedia Definition In electric power transmission and distribution, volt-ampere reactive (var) is a unit used to measure reactive power in an AC electric

219

Research to Prevent the Anti-charging Incident of the Voltage Transformer in the Substation  

Science Journals Connector (OSTI)

The voltage transformer of the power system is a device which converts the high voltage of the primary side into the low voltage required by secondary device, and the primary side connects to the primary syste...

Hui-Ying Chen; Zhi-Peng Wang; Mu-Qin Tian

2011-01-01T23:59:59.000Z

220

Data:18733b2f-bbae-46bc-bbb1-ac5135bdd76a | Open Energy Information  

Open Energy Info (EERE)

b2f-bbae-46bc-bbb1-ac5135bdd76a b2f-bbae-46bc-bbb1-ac5135bdd76a No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Natchez Trace Elec Power Assn Effective date: End date if known: Rate name: Outdoor Lighting HPS 250 W Sector: Lighting Description: Source or reference: http://www.ntepa.com/ Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous 1 2 3 Next >> Seasonal/Monthly Demand Charge Structures

Note: This page contains sample records for the topic "ac power voltage" 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

Data:381deca3-a2f1-4614-9626-fed82694ac2d | Open Energy Information  

Open Energy Info (EERE)

deca3-a2f1-4614-9626-fed82694ac2d deca3-a2f1-4614-9626-fed82694ac2d No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Delmarva Power Effective date: 2013/06/01 End date if known: Rate name: OL "HPS" 250 Watt (Enclosed) (Customer Owned w/o maintenance) 109 kW Sector: Lighting Description: http://www.delmarva.com/_res/documents/DEMasterTariff.pdf Source or reference: Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category:

222

Data:3795e8fa-f992-4439-ac80-a5cb6584804a | Open Energy Information  

Open Energy Info (EERE)

fa-f992-4439-ac80-a5cb6584804a fa-f992-4439-ac80-a5cb6584804a No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Southwest Iowa Rural Elec Coop Effective date: 2011/05/01 End date if known: Rate name: Residential Single Phase Sector: Residential Description: Wholesale power cost adjustment is applicable. Source or reference: http://www.swiarec.coop/account/rates.shtml Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category:

223

AC Transit  

Broader source: Energy.gov [DOE]

AC Transit (or the Alameda-Contra Costa Transit District) is based in Oakland, California, and provides transportation services to the East Bay of San Francisco. The 360-square-mile service area includes 13 cities and adjacent unincorporated areas in Alameda and Contra Costa counties. AC Transit's approximately 638 vehicles serve more than 65 million annual passengers.

224

Design of an input filter for power factor correction (PFC) AC to DC converters employing an active ripple cancellation  

SciTech Connect (OSTI)

An active input filter for power factor correction (PFC) circuit employing ripple current cancellation is proposed to reduce the filter`s size and cost.Switching ripple current can be filtered by an active circuit from the line current. A single stage passive filter with the active filter compensation circuit, a high filter can be synthesized to meet the electromagnetic interference (EMI) and power factor requirements. Analysis of the active filter and design procedure are detailed. Simulation result is presented to verify the high order filter characteristics of proposed scheme.

Lee, D.Y.; Cho, B.H. [Seoul National Univ. (Korea, Republic of). Electrical Engineering Dept.

1996-12-31T23:59:59.000Z

225

Techniques for energy conservation in ac motor-driven systems. Final report  

SciTech Connect (OSTI)

Techniques for energy conservation of reducing losses in ac motor-driven systems proposed by the technical community in response to surging cost of energy are evaluated and compared. Report objectives are to provide better understanding of underlying principles and to evaluate technical and economic viability of these techniques for various applications. An important aspect considered is the impact on electric utility system in terms of harmonics, power factor of operation, and Electro-Magnetic Interference (EMI). The techniques evaluated are: NASA Power Factor Controller, a simple device for reducing power losses in lightly loaded ac motors; wanlass motor modification, a scheme of reconnecting motor windings with capacitors in series, with the intention of improving the motor efficiencies under all loading conditions; conventional variable frequency solid-state inverters which can control the speed of ac motors by producing adjustable frequency ac voltage, with a significant potential for energy conservation in pumps and air-handling systems; and other variable frequency drives and schemes including cycloconverters, slip-recovery scheme, Exxon Alternating Current Synthesizer, Venturini conversion technique, permanent magnet synchronous motors, and a device called the Phase-Liner. The impact of rapid growth in semiconductors and magnetic materials technologies is also considered.

Mohan, N.

1981-09-01T23:59:59.000Z

226

Do not exceed the operating input power, voltage, and current level and signal type appropriate for the instrument being used, refer to  

E-Print Network [OSTI]

operation. - Instrument generates high temperature or electrical shock during operation. - Power cable, plug below, immediately terminate operation and disconnect the power cable. Contact your local Agilent;Herstellerbescheinigung GER AUSCHEMISSION LpA Manufacturer

Anlage, Steven

227

Distributed Voltage and Current Control of Multi-Terminal High-Voltage Direct  

E-Print Network [OSTI]

to AC transmission systems. Off-shore wind farms also typically require HVDC power transmission This work was supported in part by the European Commission by the Hycon2 project, the Swedish Research

Dimarogonas, Dimos

228

Data:0035917e-2145-402d-ac20-617ac6c62e50 | Open Energy Information  

Open Energy Info (EERE)

e-2145-402d-ac20-617ac6c62e50 e-2145-402d-ac20-617ac6c62e50 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: CenterPoint Energy Effective date: 2013/01/25 End date if known: Rate name: Street Lighting - HPS 250 Watt SB - Existing Pole Mounts Sector: Lighting Description: Electric, LLC (CEHE or Company) where facilities of adequate capacity and suitable voltage are adjacent to the street lighting fixtures and ornamental standards (if any) to be served. The standard street lighting service provided by the Company is installed along public streets, roadways or other public access areas in accordance with Section 6.1.2.2, Construction Services, in this Tariff. Company will only provide for the delivery of electric power and energy, the street lighting fixtures and ornamental standards (if any), and maintenance. Retail Customer's electric power and energy must be provided by the Retail Customer's REP in accordance with Applicable Legal Authorities and the Company's Tariff.

229

DC-AC Cascaded H-Bridge Multilevel Boost Inverter With No Inductors for Electric/Hybrid Electric Vehicle Applications  

SciTech Connect (OSTI)

This paper presents a cascaded H-bridge multilevel boost inverter for electric vehicle (EV) and hybrid EV (HEV) applications implemented without the use of inductors. Currently available power inverter systems for HEVs use a dc-dc boost converter to boost the battery voltage for a traditional three-phase inverter. The present HEV traction drive inverters have low power density, are expensive, and have low efficiency because they need a bulky inductor. A cascaded H-bridge multilevel boost inverter design for EV and HEV applications implemented without the use of inductors is proposed in this paper. Traditionally, each H-bridge needs a dc power supply. The proposed design uses a standard three-leg inverter (one leg for each phase) and an H-bridge in series with each inverter leg which uses a capacitor as the dc power source. A fundamental switching scheme is used to do modulation control and to produce a five-level phase voltage. Experiments show that the proposed dc-ac cascaded H-bridge multilevel boost inverter can output a boosted ac voltage without the use of inductors.

Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL; Du, Zhong [ORNL; Chiasson, John N [ORNL

2009-01-01T23:59:59.000Z

230

International Journal of Systems Science, 2000, volume 31, number 4, pages 519 527 Multi machine power system excitation control design via theories  

E-Print Network [OSTI]

voltage direct current (HVDC) power control design and static voltage condensor (SVC) control design (Lu

Qu, Zhihua

231

Rotor current transient analysis of DFIG-based wind turbines during symmetrical voltage faults  

Science Journals Connector (OSTI)

Abstract The impact of grid voltage fault on doubly fed induction generators (DFIGs), especially rotor currents, has received much attention. So, in this paper, the rotor currents of based-DFIG wind turbines are considered in a generalized way, which can be widely used to analyze the cases under different levels of voltage symmetrical faults. A direct method based on space vector is proposed to obtain an accurate expression of rotor currents as a function of time for symmetrical voltage faults in the power system. The presented theoretical analysis is simple and easy to understand and especially highlights the accuracy of the expression. Finally, the comparable simulations evaluate this analysis and show that the expression of the rotor currents is sufficient to calculate the maximum fault current, DC and AC components, and especially helps to understand the causes of the problem and as a result, contributes to adapt reasonable approaches to enhance the fault ride through (FRT) capability of DFIG wind turbines during a voltage fault.

Yu Ling; Xu Cai; Ningbo Wang

2013-01-01T23:59:59.000Z

232

A High Frequency Isolated Current-fed Bidirectional DC/AC Converter For Grid-Tied Energy Storage System  

E-Print Network [OSTI]

tied energy storage systems (ESS) will be voltage to a high-DC/AC converter to interface ESS based on low voltage cellscharging and discharging of the ESS and the control strategy

King Jet, TSENG

2013-01-01T23:59:59.000Z

233

Distribution System Voltage Regulation by Distributed Energy Resources  

SciTech Connect (OSTI)

This paper proposes a control method to regulate voltages in 3 phase unbalanced electrical distribution systems. A constrained optimization problem to minimize voltage deviations and maximize distributed energy resource (DER) active power output is solved by harmony search algorithm. IEEE 13 Bus Distribution Test System was modified to test three different cases: a) only voltage regulator controlled system b) only DER controlled system and c) both voltage regulator and DER controlled system. The simulation results show that systems with both voltage regulators and DER control provide better voltage profile.

Ceylan, Oguzhan [ORNL; Liu, Guodong [ORNL; Xu, Yan [ORNL; Tomsovic, Kevin [University of Tennessee, Knoxville (UTK)

2014-01-01T23:59:59.000Z

234

Triple voltage dc-to-dc converter and method  

DOE Patents [OSTI]

A circuit and method of providing three dc voltage buses and transforming power between a low voltage dc converter and a high voltage dc converter, by coupling a primary dc power circuit and a secondary dc power circuit through an isolation transformer; providing the gating signals to power semiconductor switches in the primary and secondary circuits to control power flow between the primary and secondary circuits and by controlling a phase shift between the primary voltage and the secondary voltage. The primary dc power circuit and the secondary dc power circuit each further comprising at least two tank capacitances arranged in series as a tank leg, at least two resonant switching devices arranged in series with each other and arranged in parallel with the tank leg, and at least one voltage source arranged in parallel with the tank leg and the resonant switching devices, said resonant switching devices including power semiconductor switches that are operated by gating signals. Additional embodiments having a center-tapped battery on the low voltage side and a plurality of modules on both the low voltage side and the high voltage side are also disclosed for the purpose of reducing ripple current and for reducing the size of the components.

Su, Gui-Jia (Knoxville, TN)

2008-08-05T23:59:59.000Z

235

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

236

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

237

Panel Session: Optimization Techniques in Voltage Collapse Analysis," IEEE PES Summer Meeting, San Diego, July 14, 1998. Applications of Optimization to Voltage Collapse Analysis  

E-Print Network [OSTI]

Panel Session: Optimization Techniques in Voltage Collapse Analysis," IEEE PES Summer Meeting, San Diego, July 14, 1998. Applications of Optimization to Voltage Collapse Analysis Claudio A. Ca|Thispaper describesseveralapplica- tions of optimization for voltage stability analysis VSA of power systems. Voltage stability prob

Cañizares, Claudio A.

238

Data:678d7f03-ac7d-4270-8176-1daccc6c5c83 | Open Energy Information  

Open Energy Info (EERE)

f03-ac7d-4270-8176-1daccc6c5c83 f03-ac7d-4270-8176-1daccc6c5c83 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Athens Utility Board Effective date: 2011/08/01 End date if known: Rate name: SEASONAL DEMAND AND ENERGY RATES SMSC: Sector: Industrial Description: Source or reference: http://www.aub.org/rate_power_ci.php Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous

239

Data:E8f643c3-8975-42bb-bc79-ac08f097adc8 | Open Energy Information  

Open Energy Info (EERE)

3c3-8975-42bb-bc79-ac08f097adc8 3c3-8975-42bb-bc79-ac08f097adc8 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: McCook Public Power District Effective date: 2012/01/01 End date if known: Rate name: Irrigation Pivot Only Service V2 Sector: Industrial Description: Source or reference: Ilinois State University Rate binder # 10 Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >>

240

Data:2d08187e-df4e-44ac-884f-d620b6014b94 | Open Energy Information  

Open Energy Info (EERE)

7e-df4e-44ac-884f-d620b6014b94 7e-df4e-44ac-884f-d620b6014b94 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Stanton County Public Pwr Dist Effective date: 2012/01/01 End date if known: Rate name: Municipal Large Power Seasonal Sector: Industrial Description: Source or reference: ISU Archives Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous 1 2 3 Next >>

Note: This page contains sample records for the topic "ac power voltage" 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

Data:1d7453db-c309-4ac6-adfb-02a94ff9c66c | Open Energy Information  

Open Energy Info (EERE)

53db-c309-4ac6-adfb-02a94ff9c66c 53db-c309-4ac6-adfb-02a94ff9c66c No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Cleco Power LLC Effective date: 2011/02/01 End date if known: Rate name: Company-Owned Fixture - Floodlights 1000 Watt Metal Halide Sector: Lighting Description: Source or reference: www.cleco.com Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous

242

Data:C46faa1a-ac03-4153-b6da-2f6fed294612 | Open Energy Information  

Open Energy Info (EERE)

a-ac03-4153-b6da-2f6fed294612 a-ac03-4153-b6da-2f6fed294612 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Long Island Power Authority Effective date: 2013/06/01 End date if known: Rate name: 283 - Secondary Service Sector: Commercial Description: Source or reference: www.lipower.org/pdfs/account/rates_comm.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous

243

Data:8147c65e-738f-42da-a713-7f6ac750392d | Open Energy Information  

Open Energy Info (EERE)

c65e-738f-42da-a713-7f6ac750392d c65e-738f-42da-a713-7f6ac750392d No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Crow Wing Cooperative Power & Light Comp Effective date: End date if known: Rate name: Whole House Heat Pump Sector: Residential Description: (this program is closed to new participants) Source or reference: http://www.cwpower.com/rates.shtml Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring:

244

Data:766452be-0ac9-47b3-accb-7b30c6be754a | Open Energy Information  

Open Energy Info (EERE)

2be-0ac9-47b3-accb-7b30c6be754a 2be-0ac9-47b3-accb-7b30c6be754a No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Southwestern Electric Power Co (Louisiana) Effective date: 2013/03/01 End date if known: Rate name: MV - Closed Offerings - 175 Watt Mercury Vapor Sector: Lighting Description: Source or reference: https://www.swepco.com/ Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >>

245

Data:7f002ac8-3ebb-4ff8-b25e-d25a7348c050 | Open Energy Information  

Open Energy Info (EERE)

f002ac8-3ebb-4ff8-b25e-d25a7348c050 f002ac8-3ebb-4ff8-b25e-d25a7348c050 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Southwestern Electric Power Co (Louisiana) Effective date: 2013/03/01 End date if known: Rate name: MV - Closed Offerings - 100 Watt Mercury Vapor Sector: Lighting Description: Source or reference: https://www.swepco.com/ Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2

246

Data:A2136e95-3cde-4ac6-ad61-17df32db52b2 | Open Energy Information  

Open Energy Info (EERE)

6e95-3cde-4ac6-ad61-17df32db52b2 6e95-3cde-4ac6-ad61-17df32db52b2 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: M J M Electric Cooperative Inc Effective date: End date if known: Rate name: Large Power (Special Quarries Rate) Sector: Commercial Description: Source or reference: Rate Binder #7 (Illinois State University) Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous

247

Data:C3d66983-51ac-4a44-9436-6e74555d1163 | Open Energy Information  

Open Energy Info (EERE)

983-51ac-4a44-9436-6e74555d1163 983-51ac-4a44-9436-6e74555d1163 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Florida Power & Light Co. Effective date: 2013/07/01 End date if known: Rate name: OL-1 - Outdoor Lighting - Sodium Vapor 150 Watt Relamping - Customer Owned Sector: Lighting Description: Source or reference: www.fpl.com/rates Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous

248

Data:89a54dd1-2c9a-4dca-ac7c-8249caf259c0 | Open Energy Information  

Open Energy Info (EERE)

dd1-2c9a-4dca-ac7c-8249caf259c0 dd1-2c9a-4dca-ac7c-8249caf259c0 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Loup River Public Power Dist Effective date: 2013/01/15 End date if known: Rate name: District Owned Lighting EWN 27500 Sector: Commercial Description: Source or reference: www.loup.com/customersvc/rates.asp Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous

249

Data:99df3a59-78af-4da7-8083-753a727ac125 | Open Energy Information  

Open Energy Info (EERE)

78af-4da7-8083-753a727ac125 78af-4da7-8083-753a727ac125 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Cleco Power LLC Effective date: 2011/02/01 End date if known: Rate name: Company-Owned Fixture - Floodlights 750 Watt HPS Sector: Lighting Description: Source or reference: www.cleco.com Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous 1 2 3 Next >>

250

Data:Ed495bde-91e5-416f-b491-ea26ac6bc0ad | Open Energy Information  

Open Energy Info (EERE)

Ed495bde-91e5-416f-b491-ea26ac6bc0ad Ed495bde-91e5-416f-b491-ea26ac6bc0ad No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Western Area Power Administration (Arizona) Effective date: 2011/10/01 End date if known: Rate name: Regulation and Frequency Response Sector: Industrial Description: Source or reference: www.wapa.gov/dsw/pwrmkt/CRS/Current/Fy2012/RateSched.doc Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring:

251

Data:Ac71e8e5-289a-406f-a285-f0841344230d | Open Energy Information  

Open Energy Info (EERE)

Ac71e8e5-289a-406f-a285-f0841344230d Ac71e8e5-289a-406f-a285-f0841344230d No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Custer Public Power District Effective date: 2013/01/01 End date if known: Rate name: RURAL GENERAL SINGLE PHASE SERVICE - RATE CLASS 41 Sector: Commercial Description: Source or reference: http://www.custerpower.com/2012_Rates.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous

252

Data:B8b96e15-393d-4479-ac9e-d48adfd22275 | Open Energy Information  

Open Energy Info (EERE)

393d-4479-ac9e-d48adfd22275 393d-4479-ac9e-d48adfd22275 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Butler Public Power District Effective date: 2013/01/01 End date if known: Rate name: Commercial/Industrial Rate 04 Three Phase Sector: Commercial Description: Source or reference: http://www.butlerppd.com/customerpacket.htm Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >>

253

Data:D85d035b-2a02-45ac-8b2c-973f0f74dfd0 | Open Energy Information  

Open Energy Info (EERE)

35b-2a02-45ac-8b2c-973f0f74dfd0 35b-2a02-45ac-8b2c-973f0f74dfd0 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Cornhusker Public Power Dist Effective date: 2012/01/01 End date if known: Rate name: Irrigation and Grain-Drying Service I-3 (13, 14)- Three Control Days - With No Capacitor Sector: Residential Description: Source or reference: Illinois State University Binder #10 Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category:

254

Data:1f10a653-341f-4ac2-88ff-f580e17d3f23 | Open Energy Information  

Open Energy Info (EERE)

3-341f-4ac2-88ff-f580e17d3f23 3-341f-4ac2-88ff-f580e17d3f23 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Nebraska Public Power District Effective date: 2013/01/01 End date if known: Rate name: Directional Lighting HPS 400 W Unmetered 834 Sector: Lighting Description: 834 Source or reference: http://www.nppd.com/assets/areadirectionallighting.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous

255

Data:F0974650-57e9-470a-ac45-474810ee3d42 | Open Energy Information  

Open Energy Info (EERE)

50-57e9-470a-ac45-474810ee3d42 50-57e9-470a-ac45-474810ee3d42 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Carroll Electric Member Corp Effective date: End date if known: Rate name: Large Power Service* Sector: Description: Source or reference: Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous 1 2 3 Next >> Seasonal/Monthly Demand Charge Structures Structure for Rate Period 1

256

Data:E7f706d6-e848-4690-ac13-59bc3528f32d | Open Energy Information  

Open Energy Info (EERE)

d6-e848-4690-ac13-59bc3528f32d d6-e848-4690-ac13-59bc3528f32d No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Brunswick Electric Member Corp Effective date: 2012/06/01 End date if known: Rate name: Residential Sector: Residential Description: WPCA (Wholesale Power Cost Adjustment) as of June 1, 2012 - Residential $.00809/kW Source or reference: www.bemc.org Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring:

257

Data:30556eb8-afd6-4c19-81d4-32e13473ac5a | Open Energy Information  

Open Energy Info (EERE)

afd6-4c19-81d4-32e13473ac5a afd6-4c19-81d4-32e13473ac5a No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Natchez Trace Elec Power Assn Effective date: End date if known: Rate name: Outdoor Lighting HPS 400 W Sector: Lighting Description: Source or reference: http://www.ntepa.com/ Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous 1 2 3 Next >> Seasonal/Monthly Demand Charge Structures

258

Data:Bc8acb8a-c075-4fde-89bd-7305f4dee4f9 | Open Energy Information  

Open Energy Info (EERE)

acb8a-c075-4fde-89bd-7305f4dee4f9 acb8a-c075-4fde-89bd-7305f4dee4f9 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Delmarva Power Effective date: 2013/06/01 End date if known: Rate name: OL "HPS" 400 Watt (Enclosed) (Customer Owned w/ maintenance) 164 kW Sector: Industrial Description: Source or reference: http://www.delmarva.com/_res/documents/DEMasterTariff.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category:

259

Data:Da6b1182-7ac7-4635-8841-7f6d8be11e96 | Open Energy Information  

Open Energy Info (EERE)

82-7ac7-4635-8841-7f6d8be11e96 82-7ac7-4635-8841-7f6d8be11e96 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Natchez Trace Elec Power Assn Effective date: End date if known: Rate name: Outdoor Lighting HPS 400 W Dedicated Transformer Sector: Lighting Description: Source or reference: http://www.ntepa.com/ Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous

260

AN "AC INDUCTOR" BASED GRID CONNECTED INVERTER  

E-Print Network [OSTI]

AN "AC INDUCTOR" BASED GRID CONNECTED INVERTER Ilya Zeltser, Student Member, IEEE and Sam Ben proposes a soft switched Output Current Sourcing (OCS) grid connected inverter that applies a high sourcing inverters where the small disturbance at the line voltage may lead to current run away

Note: This page contains sample records for the topic "ac power voltage" 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

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

262

Study and Design a Strategy to Control High-Voltage Power Supply Based on PSM Technology on J-TEXT Tokamak  

Science Journals Connector (OSTI)

As shown in Fig. 1, the power is supplied by a 100 MW pulse flywheel generator with an output of 6.3 kV/80 Hz [14]. Four dry-type transformers with 36 secondary windings feed 144...15].

Shaoxiang Ma; Ming Zhang; Linglong Xia; Dehong Chen…

2014-12-01T23:59:59.000Z

263

High Voltage DC Transmission 2 1.0 Introduction  

E-Print Network [OSTI]

1 High Voltage DC Transmission 2 1.0 Introduction Interconnecting HVDC within an AC system requires on use of switching devices collectively referred to in the HVDC community as valves. Valves may be non. Fig. 1 There have been three types of devices for implementing HVDC converter circuits: mercury

McCalley, James D.

264

Data:C33d18ac-ec9a-44b1-b242-c482b98c2bab | Open Energy Information  

Open Energy Info (EERE)

d18ac-ec9a-44b1-b242-c482b98c2bab d18ac-ec9a-44b1-b242-c482b98c2bab No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Minnesota Power Inc Effective date: 2013/01/01 End date if known: Rate name: COMMERCIAL/INDUSTRIAL DUAL FUEL INTERRUPTIBLE ELECTRIC SERVICE HIGH V Sector: Commercial Description: To the interruptible electric service requirements of Commercial/Industrial Customers where an alternative source of energy is available to satisfy these requirements during periods of interruption. Service shall be delivered at one point from facilities of adequate type and capacity and shall be metered at (or compensated to) the voltage of delivery. Service is subject to Company's Electric Service Regulations and any applicable Riders. TYPE OF SERVICE Single phase, three phase, or single and three phase, 60 hertz, at low voltage (voltage level lower than that available from Company's 13,000 volt system) or high voltage (voltage level equal to or greater than that available from Company's 13,000 volt system).

265

A Novel Inductor-less DC-AC Cascaded H-bridge Multilevel Boost Inverter for Electric/Hybrid Electric Vehicle Applications  

SciTech Connect (OSTI)

This paper presents an inductorless cascaded H- bridge multilevel boost inverter for EV and HEV applications. Currently available power inverter systems for HEVs use a DC- DC boost converter to boost the battery voltage for a traditional 3-phase inverter. The present HEV traction drive inverters have low power density, are expensive, and have low efficiency because they need a bulky inductor. An inductorless cascaded H-bridge multilevel boost inverter for EV and HEV applications is proposed in this paper. Traditionally, each H-bridge needs a DC power supply. The proposed inductorless cascaded H-bridge multilevel boost inverter uses a standard 3-leg inverter (one leg for each phase) and an H-bridge in series with each inverter leg which uses a capacitor as the DC power source. Fundamental switching scheme is used to do modulation control and to produce a 5-level phase voltage. Experiments show that the proposed inductorless DC-AC cascaded H-bridge multilevel boost inverter can output a boosted AC voltage.

Du, Zhong [ORNL; Ozpineci, Burak [ORNL; Tolbert, Leon M [ORNL; Chiasson, John N [ORNL

2007-01-01T23:59:59.000Z

266

Data:E6a17bb2-0497-45db-b6c5-ac32197216dc | Open Energy Information  

Open Energy Info (EERE)

a17bb2-0497-45db-b6c5-ac32197216dc a17bb2-0497-45db-b6c5-ac32197216dc No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Perennial Public Power Dist Effective date: 2013/01/01 End date if known: Rate name: INDUSTRIAL POWER SERVICE - INTERRUPTIBLE Sector: Industrial Description: On-peak Demand charge. Source or reference: http://www.perennialpower.com/Images/INDUSTRIAL%20POWER%20SERVICE%20-%20INTERRUPTIBLE.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V):

267

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

SciTech Connect (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

268

AC-loss considerations of a pulse SMES for an accelerator  

Science Journals Connector (OSTI)

In particle accelerators quasi-DC superconducting magnets are used to keep particles in desired tracks. The needed rapid field variations of these high energy magnets require large energy bursts. If these bursts are taken from and fed back to the utility grid, its voltage is distorted and the quality of the electricity degrades. In addition, these bursts may decrease operation life time of generators and extra arrangements may be required by the electricity producers. Thus, an energy storage is an essential component for a cost-effective particle accelerator. Flywheels, capacitors and superconducting magnetic energy storage (SMES) are possible options for these relatively large and high power energy storages. Here we concentrate on AC-loss of a pulse SMES aiming to demonstrate the feasibility of NbTi SMES in a particle accelerator. The designing of a SMES requires highly reliable AC-loss simulations. In this paper, calorimetric AC-loss measurements of a NbTi magnet have been carried out to consider conductor's suitability in a pulse SMES. In addition, the measured results are compared with AC-loss simulations.

M Lyly; I Hiltunen; J Järvelä; A Korpela; L Lehti; A Stenvall; R Mikkonen

2010-01-01T23:59:59.000Z

269

Constant voltage ultracapacitor  

Science Journals Connector (OSTI)

Ultracapacitors have attracted lots of attention recently due to their growing use in hybrid vehicles and in energy storage applications for the smart grid. A very undesirable feature of ultracapacitors is the fact that the voltage drops as the capacitor is discharged. DC-DC converters are employed at present to convert the voltage of the ultracapacitor to constant voltage; however these converters typically do not operate if the voltage of the ultracapacitor drops below 1?V. In addition DC-DC converters suffer from well-known size/efficiency tradeoffs. This paper introduces a novel new ultracapacitor that is characterized by constant voltage. The new ultracapacitor does not utilize familiar energy conversion principles. Rather operation depends on an embedded electromechanical system that actually alters the capacitance of the ultracapacitor as the device is discharged. Due to a simple proportionality relationship between charge capacitance and voltage the voltage remains constant. Theoretical and experimental investigations have shown that the embedded mechanism for altering the capacitance has an efficiency of 99% or higher.

Ezzat G. Bakhoum

2012-01-01T23:59:59.000Z

270

Power Grid Correction Using Sensitivity Analysis.  

E-Print Network [OSTI]

??Power grid voltage integrity verification requires checking if all the voltage drops on the grid are less than a certain threshold that guarantees proper circuit… (more)

Aydonat, Meric

2010-01-01T23:59:59.000Z

271

Substation voltage upgrading  

SciTech Connect (OSTI)

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

272

REQUEST BY BALLARD POWER SYSTEMS CORPORATION FOR AN ADVANCE WAIVER OF DOMESTIC AND FOREIGN RIGHTS IN  

Broader source: Energy.gov (indexed) [DOE]

BALLARD POWER SYSTEMS CORPORATION FOR AN BALLARD POWER SYSTEMS CORPORATION FOR AN ADVANCE WAIVER OF DOMESTIC AND FOREIGN RIGHTS IN SUBJECT INVENTIONS MADE IN THE COURSE OF OR UNDER UT- BATTELLE, LLC SUBCONTRACT NO. 4000029752 UNDER PRIME CONTRACT NO. DE-AC05-00OR22725; DOE WAIVER DOCKET W(A)- 04-055 [ORO-790] Ballard Power Systems Corporation (Ballard) has made a timely request for an advance waiver of worldwide rights in Subject Inventions made in the course of or under UT- Battelle, LLC Subcontract No. 4000029752, entitled, "Research and Development of Fuel Cell & Advanced Vehicle Power Electronics and Machinery Applications" under UT-Battelle Prime Contract No. DE-AC05-00OR22725. The scope of work involves designing, developing, testing and delivering 4 prototype high voltage to 14V dc-to-dc

273

Microsoft PowerPoint - [9] Jack McCall Slides - HVDC Workshop April 2013  

Broader source: Energy.gov (indexed) [DOE]

Tres Tres Amigas Superstation: Opportunity, Technology, Challenges U.S. DOE Applications for High-Voltage Direct U.S. DOE Applications for High-Voltage Direct Current Transmission Technologies Workshop April 22, 2013 Arlington, VA Project Value Creation Connects the three US asynchronous power grids through a DC hub that can regulate the direction and level of power flows between the grids Provides economic incentives to further drive the growth of the nation's renewable resources 2 Optimizes the value of existing and planned AC and DC/ HTS infrastructure Provides open-access and cost-effective transmission services consistent with NERC standards and regional reliability requirements Provides voltage support, capacity firming and other value-added and ancillary

274

DECENTRALIZED VOLTAGE CONTROL TO MINIMIZE DISTRIBUTION LOSSES IN AN ISLANDED MICROGRID  

E-Print Network [OSTI]

power sources and energy storage systems such as batteries requires new power and voltage control-time voltage control algorithm that minimizes power losses for a microgrid supported by inverter based Microgrids can bring electricity power to rural communities or isolated military forward operation bases

Peng, Huei

275

Power Factor Compensation (PFC) Power Factor Compensation  

E-Print Network [OSTI]

Power Factor Compensation (PFC) Power Factor Compensation The power factor (PF) is defined as the ratio between the active power and the apparent power of a system. If the current and voltage are periodic with period , and [ ), then the active power is defined by ( ) ( ) (their inner product

Knobloch,JĂĽrgen

276

Data:5692e47f-44ac-4ddd-8a11-3650aaab4afc | Open Energy Information  

Open Energy Info (EERE)

2e47f-44ac-4ddd-8a11-3650aaab4afc 2e47f-44ac-4ddd-8a11-3650aaab4afc No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: KEM Electric Coop Inc Effective date: End date if known: Rate name: General Service - Three Phase/Lg Power Sector: Industrial Description: Available to all members who require multi-phase electric service. Service capacity will start at 51 kVa and shall not exceed a 999 kVa. Service shall be to a single point of service Type of Service Three Phase, 60 cycle, at secondary voltages. The Cooperative will provide meter, meter socket, and C.T. equipment necessary to measure electric usage.

277

Data:08648ff9-d4c8-4187-ac74-9367450ddd88 | Open Energy Information  

Open Energy Info (EERE)

ff9-d4c8-4187-ac74-9367450ddd88 ff9-d4c8-4187-ac74-9367450ddd88 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of St Marys, Ohio (Utility Company) Effective date: 2001/06/10 End date if known: Rate name: Industrial General Service Transmission Rate-Metering Discount Sector: Industrial Description: *This rate is available for lighting and power for those customers establishing a minimum of 3,000 KW demand. character of service:Standard transmission service voltages as provided in rules and regulations, Alternating Current 60 Hertz (cycles per second). minimum monthly charge:The minimum monthly charge will be based upon a billing demand of no less than 3,000 KW demand.

278

Data:12161c8c-37ac-4aef-9801-dfbb928dd419 | Open Energy Information  

Open Energy Info (EERE)

c8c-37ac-4aef-9801-dfbb928dd419 c8c-37ac-4aef-9801-dfbb928dd419 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of St Marys, Ohio (Utility Company) Effective date: 2001/06/10 End date if known: Rate name: Commercial General Service Transmission Rate-Off Peak Sector: Commercial Description: *This rate is available for lighting and power for those consumers establishing a minimum of 1,000 KW demand. character of service:Standard transmission service voltages as provided in rules and regulations, Alternating Current 60 Hertz (cycles per second). Distribution and ancillary charges:All kilowatts of billing demand per month - $0.98/KW. Added to demand charge.

279

Data:Ca3573cf-221c-44ab-86ff-89eee32076ac | Open Energy Information  

Open Energy Info (EERE)

cf-221c-44ab-86ff-89eee32076ac cf-221c-44ab-86ff-89eee32076ac No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: KEM Electric Coop Inc Effective date: End date if known: Rate name: Public Use - Single Phase/Lg Power Sector: Commercial Description: Available to all members who require single phase electric service, and are a government unit: federal, state, local, or public school. Service capacity will be greater than 50 kVa and shall not exceed 999kVa. Service shall be to a single point of service. Type of Service Single Phase, 60 cycles, at secondary voltages. The Cooperative will provide meter, meter socket, and C.T. equipment necessary to measure electric usage.

280

Data:6396fbcb-f4a3-436d-8723-0dfde80e00ac | Open Energy Information  

Open Energy Info (EERE)

fbcb-f4a3-436d-8723-0dfde80e00ac fbcb-f4a3-436d-8723-0dfde80e00ac No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Kaw Valley Electric Coop Inc Effective date: 2012/02/01 End date if known: Rate name: Large Power Service - Interruptible (55) Sector: Commercial Description: The Flat rate Adjustments fluctuates with the Cooperative's Wholesale Power Cost. Source or reference: http://www.kve.coop/elecRates.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V):

Note: This page contains sample records for the topic "ac power voltage" 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

Data:Bb03ebf5-822e-4d9e-a54a-c1b3483938ec | Open Energy Information  

Open Energy Info (EERE)

3ebf5-822e-4d9e-a54a-c1b3483938ec 3ebf5-822e-4d9e-a54a-c1b3483938ec No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of Halstad, Minnesota (Utility Company) Effective date: 2013/01/20 End date if known: Rate name: Power(HLC) Sector: Commercial Description: Nursing Home Source or reference: Rate Binder #10A, Illinois State University. Source Parent: Comments Flat rate buy= energy charge + Power surcharge Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service

282

Data:8637b2e2-ef4d-425f-851f-8f92ac71b667 | Open Energy Information  

Open Energy Info (EERE)

e2-ef4d-425f-851f-8f92ac71b667 e2-ef4d-425f-851f-8f92ac71b667 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Public Utility District No 2 Effective date: 2012/10/01 End date if known: Rate name: Primary Metered Commercial Single Phase Sector: Commercial Description: This schedule is applicable to commercial, public buildings, and other services where facilities were constructed to operate at a voltage greater than six hundred volts and where measured demand is greater than 50 kW at least one time during a calendar year. Power Cost Adjustment Factor = 7% The Power Cost Adjustment is based on rate adjustments from BPA .

283

Data:C59bf658-ac51-4245-962f-3e58bdf5cd27 | Open Energy Information  

Open Energy Info (EERE)

8-ac51-4245-962f-3e58bdf5cd27 8-ac51-4245-962f-3e58bdf5cd27 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of Anoka, Minnesota (Utility Company) Effective date: 2009/01/01 End date if known: Rate name: Green Power Wind Sector: Description: Source or reference: Rate Binder Kelly 3 ISU Documentation Source Parent: Comments $1/75 per 100 hwr converted to $0.0175 per kwh; ie Green Power is sold in blocks of 100kwh. Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service

284

E-Print Network 3.0 - applied voltages ii Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

dc-link voltage error is applied to the fun... --In this paper, a new hybrid active power filter topology is presented. A higher-voltage, low-switching fre... - quency...

285

The high voltage problem in the saturated core HTS fault current limiter  

Science Journals Connector (OSTI)

A small model of a one-phase saturated core HTS fault current limiter was developed. It consists of an iron core, an AC coil and a DC HTS coil. The HTS coil comprised six 126 turns double-pancakes (ID 70 mm), wound after heat treatment from Bi-2223 multifilamentary tape in Ag matrix. A fault simulation circuit was set up to characterize the dynamic properties of the model limiter. The voltages and currents of the AC coil and the DC HTS coil were measured through a computer-based data acquisition system. The tests have shown that the limiter has a fast response and the first current peak can be easily limited, but a high voltage will be induced on the DC HTS coil side during the fault state. This high voltage can badly affect the DC current equipment on the DC HTS coil side. The origin and value of the high voltage can be explained using a transformer model. For a limiter with n1 turns AC coil and n2 turns DC coil, the largest induced voltage will be roughly close to (n2/n1)U, where U is the rated voltage of the limiter. To commercialize this kind of limiter, the high voltage problem must be solved. Some different designs were introduced to lower the induced voltage.

Y.F. He; J.H. Li; X.H. Zong; J. Sun; Y.N. Wang; C.L. Wu; J.X. Wang

2003-01-01T23:59:59.000Z

286

IMPACT OF DYNAMIC VOLTAGE SCALING (DVS) ON CIRCUIT OPTIMIZATION  

E-Print Network [OSTI]

and dynamic power, respectively. Both gate sizing and Dual-VT are design-time techniques, which are applied to the circuit at a fixed voltage. On the other hand, DVS is a run-time technique and implies that the circuit will be operating at a different voltage...

Esquit Hernandez, Carlos A.

2010-01-16T23:59:59.000Z

287

Voltage controlled current source  

DOE Patents [OSTI]

A seven decade, voltage controlled current source is described for use in testing intermediate range nuclear instruments that covers the entire test current range of from 10 picoamperes to 100 microamperes. High accuracy is obtained throughout the entire seven decades of output current with circuitry that includes a coordinated switching scheme responsive to the input signal from a hybrid computer to control the input voltage to an antilog amplifier, and to selectively connect a resistance to the antilog amplifier output to provide a continuous output current source as a function of a preset range of input voltage. An operator controlled switch provides current adjustment for operation in either a real-time simulation test mode or a time response test mode.

Casne, Gregory M. (Pittsburgh, PA)

1992-01-01T23:59:59.000Z

288

ACS_RRA_2001.PDF  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Qualitative and Semi-quantitative Qualitative and Semi-quantitative Analysis Of Semi-volatile Organics from Ambient Air Fine-particulate Matter, PM 2.5 Richard Anderson, Don Martello, Brian R. Strazisar and Curt M. White richard.anderson@netl.doe.gov ACS-222 / RRA' / ST-10 / 8-28-2001 Different Missions * EPA - Protect the public health * DOE - Assist the private sector in supplying clean, abundant, and affordable energy ACS-222 / RRA' / ST-10 / 8-28-2001 PM 2.5 Regulatory Process * 1997 National Ambient Air Quality Standards (NAAQS) for PM 2.5 based on "health effects" - Mean annual concentration < 15 µg/m 3 - Maximum concentration < 65µg/ m 3 ACS-222 / RRA' / ST-10 / 8-28-2001 Why Is DOE Concerned About PM 2.5 ? * Coal-based power systems contribute to PM 2.5 - Primary particles * Ultra-fine fly-ash (Spherical Alumino-silicates,SAS), carbon soot

289

Variable Voltage Substation Electric Fire and Emergency Response  

Broader source: Energy.gov [DOE]

Variable Voltage Substation Electric Fire and Emergency Response My question is from an emergency response perspective. You stated that it took ~ ˝ for electricians to de-energize the electrical components before firefighters were allowed in to fight the fire. This delay causes more damage to equipment and potential propagation of the fire. Is there not a “master” breaker or switch? You’ve brought up a very good point. It gave me a good opportunity to discuss this with our Facilities Department and get a better understanding of the infrastructure upgrade plans. The direct answer to your question is “Yes, but…” Yes, there are “master” breakers and switches, but we can’t control them remotely. SLAC’s AC electrical distribution system at present is manual breakers – we have not installed the infrastructure to remotely control them (except see below). We recently underwent an upgrade to our Master Substation that will allow us to remotely control some high voltage breakers in the future, but we aren’t there yet. We do recognize the value in having this capability (and more importantly, our vulnerability in NOT having it), and have begun the preliminary planning to make this happen. One issue were are working on is cyber security for the power distribution networked infrastructure. Before we install the capability to remotely control the main electrical breakers, we are planning the infrastructure with our Information Technologies organization to ensure we have a robust secure network that is protected from unauthorized access. Once the cyber security issues are addressed and funded, we’re probably 5-10 years out from having remote operation capability due to limited resources to fund and install the infrastructure. Having said the above, we do have the capability of remotely opening the VVS Secondary Main Breakers – the ones that send power to the modulator distribution breakers - from our control room. Those breakers are integral parts of our safety systems in that interlock violation causes the breakers to open and remove power to the klystrons. But everything else is manual only. That remote operation capability would not have helped us in this case, as the VVS Secondary Main Breaker was the one that fried. We needed to open the breaker upstream of the VVS. Thanks for your interest. Let me know if I can provide further information.

290

A Generalized Class of Stationary Frame-Current Controllers for Grid-Connected AC–DC Converters  

E-Print Network [OSTI]

Within power systems, high-power pulsewidth-modulated ac-dc converters are used in flexible ac transmission systems controllers and for interfacing renewable energy sources to the grid. These converters traditionally ...

Hwang, J. George

291

CPFLOW for Power Tracer and Voltage Monitoring  

E-Print Network [OSTI]

contact: Professor Hsiao-Dong Chiang School of Electrical and Computer Engineering Cornell University 328 of this publication is granted if appropriate attribution is given to this document as the source material and by the National Science Foundation through the grant NSF EEC 9616221 received under the Industry

292

High Voltage Power Supply Capacitor Problem Analysis  

E-Print Network [OSTI]

evidence of pits on the surface. One pit showed evidence that the silver had burned thru. It was concluded this was the shorted area.. A microsection of the capacitor (see photomicrograph #1} shows a pit in the dielectric material. Photomicrograph #2 shows another pit in the same capacitor. 2. 3 A total of eighteen capacitors

Rathbun, Julie A.

293

Sacramento Area Voltage Support Environmental Impact Statement  

Broader source: Energy.gov (indexed) [DOE]

E E R R A N E V A D A R E G I O N Sacramento Area Voltage Support DRAFT ENVIRONMENTAL IMPACT STATEMENT DRAFT ENVIRONMENTAL IMPACT STATEMENT DOE/EIS-0323 NOVEMBER 2002 COVER SHEET Title: Sacramento Area Voltage Support Draft Environmental Impact Statement (EIS) Lead Agency: Western Area Power Administration (Western) Location: Alameda, Contra Costa, Placer, Sacramento, San Joaquin, and Sutter Counties, State of California. EIS Number: DOE/EIS-0323 Contact: Ms. Loreen McMahon, Environmental Project Manager Western Area Power Administration Sierra Nevada Region 114 Parkshore Drive Folsom, CA 95630 (916) 353-4460 (916) 985-1936 fax email: mcmahon@wapa.gov Website: Information is also available on our website: www.wapa.gov Hotline: 1-877-913-4440 (toll-free) Abstract The Western Area Power Administration's Central Valley Project transmission system forms an integral part of

294

Northwest, the Bonneville Power  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

by a similar event. Overgrown trees came in contact with high-voltage transmission lines, causing a protective shutdown that created cascading power outages across the...

295

Analysis and design of a direct AC to AC matrix converter topology  

E-Print Network [OSTI]

However, the NCC has the following disadvantages, 1. very limited(fow) output frequency range 2. subharmonics are generated at input and output side 3. poor input power factor These disadvantages can be overcome by employing forced commutated bidirec... diode sre connected anti-series. The main objectives of this thesis are summarized as follows, 1. Study and analysis of direct ac to ac matrix power converters. 2. Preseiitation of a new PWM control strategy to selectively eliminate unwanted lower...

Choi, Sewan

2012-06-07T23:59:59.000Z

296

Power dissipation characteristics of zinc-oxide arresters for HVDC systems  

SciTech Connect (OSTI)

Zinc-oxide arresters without series gaps have been used for HVDC systems. The voltage wave shapes applied to HVDC arresters are not a simple sinusoidal shape, so that the leakage current contains high frequency components. The power dissipation characteristics of a thyristor valve arrester were measured using a 1/25 prorated arrester section with a 5kV/500kW thyristor bridge. High frequency power dissipation characteristics of zinc-oxide elements were measured and it was shown that the high frequency power dissipation of the thyristor valve arrester was larger than that of an AC system arrester. Consideration of the equivalent continuous operating voltage for the performance test of an HVDC arrester are presented.

Horiuchi, S.; Ichikawa, F. (Tokyo Electric Power Co., Inc., Tokyo (JP)); Mizukoshi, A. (Hitachi Research Lab., Hitachi Ltd. (JP)); Kurita, K.; Shirakawa, S. (Kokubu Works Hitachi Ltd., Ibaraki (JP))

1988-10-01T23:59:59.000Z

297

Definition: Automated Voltage And Var Control | Open Energy Information  

Open Energy Info (EERE)

Voltage And Var Control Voltage And Var Control Jump to: navigation, search Dictionary.png Automated Voltage And Var Control Automated voltage and VAR control requires coordinated operation of reactive power resources such as capacitor banks, voltage regulators, transformer load-tap changers, and distributed generation (DG) with sensors, controls, and communications systems. These devices could operate autonomously in response to local events or in response to signals from a central control system.[1] View on Wikipedia Wikipedia Definition Also Known As Volt-VAR Control (VVC) Related Terms smart grid, Reactive Power References ↑ SmartGrid.gov 'Description of Functions' An i LikeLike UnlikeLike You like this.Sign Up to see what your friends like. nline Glossary Definition Retrieved from

298

A linear MOSFET regulator for improving performance of the booster ramping power supplies at the APS.  

SciTech Connect (OSTI)

The APS booster ring uses ramping power supplies to power the sextupole, quadrupole, and dipole magnets as the beam energy ramps up linearly to 7 GeV. Due to the circuit topology used, those supplies are unable to follow the linear ramp to the desired accuracy. The best regulation achieved is 0.25% while 0.1% is desired. In addition to the unsatisfying regulation, those supplies are sensitive to AC line perturbation and are not able to reject AC line noises of more than a few tens of hertz. To improve the performance, a linear MOSFET regulation system using paralleled MOSFET devices in series with the power supply is proposed. The system uses a realtime current feedback loop to force the MOSFETs to work in the linear operation mode. By using this linear MOSFET regulator, the voltage drop on MOSFETs, and hence the voltage imposed on magnets, can be regulated very quickly. As a result, the regulation of the magnet current can be improved significantly. So far the simulation results show that with the linear regulator, the current regulation can be improved to better than 0.1%. Because of the high bandwidth of the linear regulator, it can reduce the harmonic content in the output current as well as reject the AC line disturbance. This paper discusses the circuit topology, the regulation method, and the simulation results.

Feng, G.; Deriy, B.; Wang, J.; Accelerator Systems Division (APS)

2008-01-01T23:59:59.000Z

299

The Application of Droop-Control in Distributed Energy Resources to Extend the Voltage Collapse Margin  

SciTech Connect (OSTI)

The growth in distributed energy resources has the potential to reduce system stresses caused by transmission grid congestion by supplying power and voltage regulation closer to load centers. However, the additional voltage regulation provided by these resources can mask the onset of voltage collapse. Local voltage support flattens the slope in the upper region of the power-voltage nose curve. Coordinating voltage-regulation behavior with the droop-control scheme in distributed resources improves the observation of voltage collapse margins. Incorporating distributed resource models in the continuation power flow analysis, allows the exploration of the power transfer gains by the application of distributed resources. The analysis provides insight to the impact of droop control on the behavior of the power-voltage curve and voltage collapse. The analysis is applied to a fixed speed induction generator wind farm with separate reactive compensation and the interconnection to the local power system. Results reveal that coordinating the droop control strategy allows the distributed resource to significantly increase the voltage collapse margin without hiding the threat of voltage stability problems.

Henry, Shawn D. [Florida State University; Rizy, D Tom [ORNL; Baldwin, Thomas L [Florida State University; Kueck, John D [ORNL; Li, Fangxing [ORNL

2008-01-01T23:59:59.000Z

300

High-voltage direct current handbook: First edition  

SciTech Connect (OSTI)

HVDC systems offer opportunities for power transfer between asynchronous systems, improved performance of the ac system in which the dc link is integrated, and possibly increased power transfer across existing lines if converted to HVDC. This handbook is intended to help planners and engineers understand the intricacies of HVDC systems.

Piwko, R.J.; Leonard, D.J.; Nolan, J.J.; Thorpe, J.B. [eds.] [GE Industrial and Power Systems, Schenectady, NY (United States)

1994-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "ac power voltage" 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

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

302

Charge-pump voltage converter  

DOE Patents [OSTI]

A charge-pump voltage converter for converting a low voltage provided by a low-voltage source to a higher voltage. Charge is inductively generated on a transfer rotor electrode during its transit past an inductor stator electrode and subsequently transferred by the rotating rotor to a collector stator electrode for storage or use. Repetition of the charge transfer process leads to a build-up of voltage on a charge-receiving device. Connection of multiple charge-pump voltage converters in series can generate higher voltages, and connection of multiple charge-pump voltage converters in parallel can generate higher currents. Microelectromechanical (MEMS) embodiments of this invention provide a small and compact high-voltage (several hundred V) voltage source starting with a few-V initial voltage source. The microscale size of many embodiments of this invention make it ideally suited for MEMS- and other micro-applications where integration of the voltage or charge source in a small package is highly desirable.

Brainard, John P. (Albuquerque, NM); Christenson, Todd R. (Albuquerque, NM)

2009-11-03T23:59:59.000Z

303

Accommodation & ACS Advertising Policy  

E-Print Network [OSTI]

Accommodation & Campus Services. ACS Advertising Policy This paper states the University department Accommodation & Campus Services' (ACS) policy on advertising, sponsorship and promotions and any restrictions. Accommodation & Campus Services, the Students' Union, all affiliated bodies and advertisers are expected

Stevenson, Mark

304

ACS-GDCh ALLIANCE  

Science Journals Connector (OSTI)

ACS-GDCh ALLIANCE ... Other aspects of the strategic collaboration alliance will identify additional activities and services that could be mutually beneficial to both ACS and GDCh members, in keeping with both organizations’ strategic goals. ...

MADELEINE JACOBS

2010-09-20T23:59:59.000Z

305

Soft switched high frequency ac-link converter  

E-Print Network [OSTI]

Variable frequency drives typically have employed dc voltage or current links for power distribution between the input and output converters and as a means to temporarily store energy. The dc link based power conversion systems have several inherent...

Balakrishnan, Anand Kumar

2009-05-15T23:59:59.000Z

306

Data:2fcc37ac-1472-42f2-b13a-15bafb26d773 | Open Energy Information  

Open Energy Info (EERE)

fcc37ac-1472-42f2-b13a-15bafb26d773 fcc37ac-1472-42f2-b13a-15bafb26d773 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Alaska Village Elec Coop, Inc Effective date: 2012/01/06 End date if known: Rate name: Large Power- GS-2: Anvik Village Sector: Industrial Description: Note: The Adjustments entered here is the sum of the "Cost of Fuel" and the "RCC". Source or reference: Rates Binder B Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V):

307

Data:85ad1e56-7ac7-499a-9d67-9054a75203ea | Open Energy Information  

Open Energy Info (EERE)

e56-7ac7-499a-9d67-9054a75203ea e56-7ac7-499a-9d67-9054a75203ea No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Trico Electric Cooperative Inc Effective date: 2009/08/01 End date if known: Rate name: Lighting Services 100 Watt HPS Sector: Lighting Description: *It is cooperative owned, operated and maintained. Subject to tax and wholesale power cost adjustment. Source or reference: http://www.trico.coop/images/TRICO_OL1.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V):

308

Data:A64e395f-5129-45d3-9356-5aa5961773ac | Open Energy Information  

Open Energy Info (EERE)

e395f-5129-45d3-9356-5aa5961773ac e395f-5129-45d3-9356-5aa5961773ac No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of Georgetown, Texas (Utility Company) Effective date: 2011/01/01 End date if known: Rate name: Large General Service Sector: Commercial Description: *50 kW minimum, not less than $372.50 The Power Cost Adjustment is shown in the Flat rate adjustment field. Source or reference: http://billing.georgetown.org/rates/ Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage

309

Data:422b5a60-4e41-40cf-899a-c107708c88a0 | Open Energy Information  

Open Energy Info (EERE)

4e41-40cf-899a-c107708c88a0 4e41-40cf-899a-c107708c88a0 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Village of Leigh, Nebraska (Utility Company) Effective date: 2013/01/15 End date if known: Rate name: Large Light and Power Subtransmission Delivery >20,000KW - Sub-Transmission Lines Sector: Industrial Description: Source or reference: http://www.loup.com/customersvc/rates.asp Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service

310

Data:D6c15de4-85bc-4479-802e-8434bd9ac279 | Open Energy Information  

Open Energy Info (EERE)

c15de4-85bc-4479-802e-8434bd9ac279 c15de4-85bc-4479-802e-8434bd9ac279 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Kaw Valley Electric Coop Inc Effective date: 2012/02/01 End date if known: Rate name: Irrigation Service - Load Control (45) Sector: Commercial Description: The Flat rate Adjustments fluctuates with the Cooperative's Wholesale Power Cost. Source or reference: http://www.kve.coop/elecRates.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V):

311

Data:Fb354812-1c9c-4ac1-9b59-f904acbea6b3 | Open Energy Information  

Open Energy Info (EERE)

4812-1c9c-4ac1-9b59-f904acbea6b3 4812-1c9c-4ac1-9b59-f904acbea6b3 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Idaho Power Co Effective date: 2012/07/01 End date if known: Rate name: Schedule 7 - Small General Service Sector: Commercial Description: AVAILABILITY Service under this schedule is available at points on the Company's interconnected system within the State of Idaho where existing facilities of adequate capacity and desired phase and voltage are adjacent to the Premises to be served, and additional investment by the Company for transmission, substation, or terminal facilities is not necessary to supply the desired service.

312

Data:C2ce0819-d6c4-41a9-8836-2ac0c7dfae14 | Open Energy Information  

Open Energy Info (EERE)

819-d6c4-41a9-8836-2ac0c7dfae14 819-d6c4-41a9-8836-2ac0c7dfae14 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Potomac Electric Power Co Effective date: End date if known: Rate name: Residential All - Electric Service - Schedule AE Sector: Description: there are multiple monthly charges, which cannot be entered into out system. Source or reference: http://www.pepco.com/_res/documents/DCRates_AE.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service

313

Data:B7c7d80c-bf58-466f-82bb-566ac3c36af0 | Open Energy Information  

Open Energy Info (EERE)

d80c-bf58-466f-82bb-566ac3c36af0 d80c-bf58-466f-82bb-566ac3c36af0 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Trico Electric Cooperative Inc Effective date: 2009/08/01 End date if known: Rate name: Street Lighting-180 Watt LPS Sector: Commercial Description: *Applicable for lighting public streets,alleys and public parks. Subject to tax and wholesale power cost. Source or reference: http://www.trico.coop/images/TRICO_SL1.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage

314

Data:Df6e3961-2f56-480b-98e1-ac714759e207 | Open Energy Information  

Open Energy Info (EERE)

2f56-480b-98e1-ac714759e207 2f56-480b-98e1-ac714759e207 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of Thomaston, Georgia (Utility Company) Effective date: 2012/01/01 End date if known: Rate name: Residential Power Sector: Residential Description: For all domectic uses of a residential customer in a separetely metered residence. Source or reference: Rate Binder# 2 (Illinois State University) Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V):

315

Data:Eba222af-34f3-4be9-b56c-0232f6ac19fd | Open Energy Information  

Open Energy Info (EERE)

af-34f3-4be9-b56c-0232f6ac19fd af-34f3-4be9-b56c-0232f6ac19fd No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of Calhoun, Georgia (Utility Company) Effective date: 2006/07/01 End date if known: Rate name: Medium Power Service- Industrial Sector: Industrial Description: This rate is applicable to all commercial or industrial electric service which is delivered or compensated to one standard voltage . Source or reference: Rate Binder # 2 Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months):

316

Data:20d016e9-b480-42ac-9daa-2df3f2ae325b | Open Energy Information  

Open Energy Info (EERE)

6e9-b480-42ac-9daa-2df3f2ae325b 6e9-b480-42ac-9daa-2df3f2ae325b No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Rio Grande Electric Coop, Inc Effective date: End date if known: Rate name: Residential Temporary Service Sector: Residential Description: *Applicable to residential, recreational, general service. Subject to Power Cost Adjustment. Source or reference: http://www.riogrande.coop/pr/rates.asp Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service

317

Data:D0d064e3-87ed-468c-b871-42c5bcdf4ac3 | Open Energy Information  

Open Energy Info (EERE)

d064e3-87ed-468c-b871-42c5bcdf4ac3 d064e3-87ed-468c-b871-42c5bcdf4ac3 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of Burbank Water and Power, California (Utility Company) Effective date: 2013/07/01 End date if known: Rate name: Small General Service Without Demand - Optional TOU Rate for Electric Vehicle Owners - One Phase Sector: Commercial Description: Source or reference: burbankca.gov/home/showdocument?id=20930 Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V):

318

Data:E8ac5675-1aef-4014-bf43-09e15b892104 | Open Energy Information  

Open Energy Info (EERE)

ac5675-1aef-4014-bf43-09e15b892104 ac5675-1aef-4014-bf43-09e15b892104 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Kaw Valley Electric Coop Inc Effective date: 2012/02/01 End date if known: Rate name: General Service Small - Three Phase (32) Sector: Commercial Description: The Flat rate Adjustments fluctuates with the Cooperative's Wholesale Power Cost. Source or reference: http://www.kve.coop/elecRates.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V):

319

Data:D81379e3-96ca-46ba-9ac6-04c7a75f10f5 | Open Energy Information  

Open Energy Info (EERE)

379e3-96ca-46ba-9ac6-04c7a75f10f5 379e3-96ca-46ba-9ac6-04c7a75f10f5 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of Troy, Indiana (Utility Company) Effective date: End date if known: Rate name: Schedule A: Residential Sector: Residential Description: Rate is subject to a Purchased Power Cost Adjustment Tracking Factor. Source or reference: Rates Binder 1, Illinois State University Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service

320

Data:0caa2ba5-1c18-4e13-ac9a-d1fd6ecb5bf0 | Open Energy Information  

Open Energy Info (EERE)

ba5-1c18-4e13-ac9a-d1fd6ecb5bf0 ba5-1c18-4e13-ac9a-d1fd6ecb5bf0 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Columbus Southern Power Co Effective date: 2012/03/09 End date if known: Rate name: Interruptible Power - Discretionary(Transmission voltage)-supplemental interruptions Sector: Industrial Description: Service pursuant to this schedule is available to customers that have provided reasonable evidence to the Company that their electric service can be interrupted within a 10-minute notice period. Customers shall contract for electrical capacity sufficient to meet normal maximum requirements but not

Note: This page contains sample records for the topic "ac power voltage" 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

Comments on "Wall-plug (AC) power consumption of a very high energy e+/e- storage ring collider" by Marc Ross  

E-Print Network [OSTI]

The paper arXiv:1308.0735 questions some of the technical assumptions made by the TLEP Steering Group when estimating in arXiv:1305.6498 the power requirement for the very high energy e+e- storage ring collider TLEP. We show that our assumptions are based solidly on CERN experience with LEP and the LHC, as well accelerators elsewhere, and confirm our earlier baseline estimate of the TLEP power consumption.

Blondel, A; Butterworth, A; Janot, P; Zimmermann, F; Aleksan, R; Azzi, P; Ellis, J; Klute, M; Zanetti, M

2013-01-01T23:59:59.000Z

322

Transient recovery voltage considerations in the application of medium voltage circuit breakers  

SciTech Connect (OSTI)

Medium Voltage Circuit Breakers can fail to interrupt 3-phase fault currents when power systems have Transient Recovery Voltage (TRV) characteristics which exceed the rating of the circuit breaker. This paper examines the application of 13.8kV generation and load switchgear for an oil refinery in which circuit parameters as originally designed would have exceeded the 13.8kV circuit breakers TRV ratings had corrective measures not been taken. This paper illustrates this case and discusses the basis of TRV, how TRV is assessed, and alternative actions taken to bring circuits to within the 13.8 kV circuit breaker ratings.

Swindler, D.L.; Schwartz, P.; Hamer, P.S.; Lambert, S.R.

1995-12-31T23:59:59.000Z

323

Ignition distributor voltage generator  

SciTech Connect (OSTI)

This patent describes a voltage pulse generator and ignition distributor comprising, a base, a shaft rotatably supported by the base, a distributor cap supported by the base having a center electrode and circumferentially spaced outer electrodes. The pulse generator and ignition distribution also include a first rotor driven by the shaft formed of electrical insulating material having electrically conductive means connected to the center terminal and a portion that rotates past the outer electrodes. The portion of the electrically conductive means that rotates past the outer electrodes is spaced from the outer electrodes to form a gap therebetween. A voltage pulse generator comprises a second rotor driven by the shaft, at least one permanent magnet and an annular pickup coil supported by the base. The pickup coil has inner turns and outer turns, the beginning turn of the inner turns connected to a first lead and the last turn of the outer turns connected to a second lead, the outer turns enclosing the inner turns. The pickup coil also has a circuit connected directly between the second lead and ground which is operative to provide a direct conductive path to ground for high frequency energy capacitively coupled to the outer turns from the gap discharge between the electrically conductive means of the first rotor and an outer electrode, the outer turns forming a grounded shield for the inner turns.

Boyer, J.A.

1986-11-04T23:59:59.000Z

324

A linear MOSFET regulation system to improve the performance of the booster-ramping power supplies at the APS.  

SciTech Connect (OSTI)

The APS booster ring uses ramping power supplies to power the sextupole, quadrupole, and dipole magnets as the beam energy ramps up linearly to 7 GeV. Due to the circuit topology used, those supplies are unable to follow the linear ramp to the desired accuracy. The best regulation achieved is 0.5% while 0.1 % is desired. In addition to the unsatisfying regulation, those supplies are sensitive to AC line perturbations and are not able to reject AC line noises higher than a few tens of Hertz. To improve the performance, a linear MOSFET regulation system using paralleled MOSFET devices in series with the power supply is proposed. The system uses a real-time current feedback loop to force the MOSFETs to work in the linear operation mode. By using this linear MOSFET regulator, the voltage drop on MOSFETs, and hence the voltage imposed on magnets, can be regulated very quickly. As a result, the regulation of the magnet current can be improved significantly. Experiments and simulation have been performed to verify the proposed method. Results show that, with the linear regulator, the current regulation can be improved to better than 0.1%. Because of the high bandwidth of the linear regulator, it can reduce the harmonic content in the output current as well as reject the AC line disturbance.

Feng, G.; Deriy, B.; Wang, J.; Shang, H.; Xu, S.

2008-01-01T23:59:59.000Z

325

PowerPerfector | Open Energy Information  

Open Energy Info (EERE)

Carbon Product: Voltage Power Optimisation technology that reduces electricity consumption, costs and carbon emissions. References: PowerPerfector1 This article is a stub....

326

Planning of distribution networks for medium voltage and low voltage.  

E-Print Network [OSTI]

??Determination of the placement and rating of transformers and feeders are the main objective of the basic distribution network planning. The bus voltage and the… (more)

Ziari, Iman

2011-01-01T23:59:59.000Z

327

Optical crystal based devices for current and voltage measurement  

SciTech Connect (OSTI)

A prerequisite for safe, stable operation of an electric power system is accurate, reliable measurement of the system parameters, in particular, current and voltage. Traditionally this has been achieved on High Voltage (HV) systems by expensive, bulky iron-cored current transformers (CTs) and capacitor voltage transformers (VTs). Both these devices are increasingly coming under review in modern power systems due to their cost, safety implications for personnel and surrounding plant if failure occurs, installation time and indeed substation land requirements. This paper describes novel designs for magneto-optic and electro-optic crystal sensors providing potentially separate and combined current and voltage measurement. The results of testing programs are presented and details of the work associated with field trials given.

Cruden, A.; Richardson, Z.J.; McDonald, J.R.; Andonovic, I. [Univ. of Strathclyde (United Kingdom)] [Univ. of Strathclyde (United Kingdom)

1995-07-01T23:59:59.000Z

328

Design & Fabrication of a High-Voltage Photovoltaic Cell  

SciTech Connect (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

329

Data:71152dce-4bbe-4ac9-89ef-d46218af42ed | Open Energy Information  

Open Energy Info (EERE)

152dce-4bbe-4ac9-89ef-d46218af42ed 152dce-4bbe-4ac9-89ef-d46218af42ed No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Sharyland Utilities LP Effective date: End date if known: Rate name: Large Power Primary (Rate Codes 660 and 668) Sector: Commercial Description: This Rate Schedule is applicable to Electric Service for non-residential purposes at primary voltage when such Electric Service is to one Point of Delivery and measured through one Meter. Electric Service will be single or three-phase, 60 hertz, at standard primary voltage. Electric Service will be metered using Company's standard Meter provided for this type of Electric Service. Any Meter other than the standard Meter will be provided at an additional charge. Where Electric Service of the type desired is not available at the Point of Delivery, additional charges and special contract arrangements may be required prior to Electric Service being furnished, pursuant to the Company's Facilities extension policy.

330

Substation voltage upgrading  

SciTech Connect (OSTI)

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

331

Design issues for high voltage converters for ion engines  

SciTech Connect (OSTI)

A design strategy is presented for a power converter for a high voltage ion engine for a spacecraft application. Various design issues such as appropriate topologies and control methods are considered. In this particular instance it was determined that a full bridge converter with phase shift gating and voltage mode control provided an efficient system with a minimum of electromagnetic interference. This system can be implemented in a straightforward manner, and it is relatively easy to protect from faults at the output.

King, R.J.; Stuart, T.A. [Univ. of Toledo, OH (United States)

1995-12-31T23:59:59.000Z

332

Control of power to an inductively heated part  

DOE Patents [OSTI]

A process for induction hardening a part to a desired depth with an AC signal applied to the part from a closely coupled induction coil includes measuring the voltage of the AC signal at the coil and the current passing through the coil; and controlling the depth of hardening of the part from the measured voltage and current. The control system determines parameters of the part that are functions of applied voltage and current to the induction coil, and uses a neural network to control the application of the AC signal based on the detected functions for each part. 6 figs.

Adkins, D.R.; Frost, C.A.; Kahle, P.M.; Kelley, J.B.; Stanton, S.L.

1997-05-20T23:59:59.000Z

333

Backstepping DC Voltage Control in a Multi-terminal HVDC System Connecting Offshore Wind Farms  

Science Journals Connector (OSTI)

Wind power is projected to play an important ... current and future power systems. To integrate offshore wind farms to the existing onshore grid, voltage source ... in a safe range. To distribute transmitted wind

Xiaodong Zhao; Kang Li; Yusheng Xue

2014-01-01T23:59:59.000Z

334

Insulation co-ordination for continuous operating voltages and temporary overvoltages  

Science Journals Connector (OSTI)

This paper presents an approach to the insulation co-ordination of electric-power installations in ... calculate the necessary required withstand voltages of unit insulations for short-duration (1 min) power-...

Zlatoje Zdravkovi?; Petar Vukelja; Jovan Mrvi?

2006-06-01T23:59:59.000Z

335

Integrating a Feature Selection Algorithm for Classification of Voltage Sags Originated in Transmission and Distribution Networks  

Science Journals Connector (OSTI)

As a global problem in the power quality area, voltage sags are matter of high interest for both utilities and customers. With a view to resolving the problem of sag source location in the power network, this paper introduces a new method based on dimension ... Keywords: Direction, Hybrid Method, Mpca, Voltage Sag

Abbas Khosravi; Toni Martinez; Joaquim Melendez; Joan Colomer; Jorge Sanchez

2007-06-01T23:59:59.000Z

336

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

337

Superconducting Fault Current Limiter for Transmission Voltage  

Science Journals Connector (OSTI)

Within a collaboration of American Superconductor, Siemens, Nexans and Southern California Edison one electrical phase of a resistive superconducting fault current limiter for the 115 kV transmission voltage level has been designed and manufactured. The active part of the limiter consists of 63 bifilar coils made of 12 mm wide steel-stabilized YBCO conductor and is housed in a cryostat operated at 5 bar and 74 K. The first phase was completely assembled and successfully subjected to power switching tests and high voltage tests. The basic design of the system and the test results are reported. The work was funded in part by US-DOE under Contract Number DE-FC26-07NT43243.

Hans-Peter Kraemer; Wolfgang Schmidt; Hong Cai; Bruce Gamble; David Madura; Tim MacDonald; Joe McNamara; Walther Romanosky; Greg Snitchler; Nicolas Lallouet; Frank Schmidt; Syed Ahmed

2012-01-01T23:59:59.000Z

338

Data:30dc512d-f10b-45fd-ac67-973e8fb4bb29 | Open Energy Information  

Open Energy Info (EERE)

2d-f10b-45fd-ac67-973e8fb4bb29 2d-f10b-45fd-ac67-973e8fb4bb29 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Carroll Electric Member Corp Effective date: 2012/01/15 End date if known: Rate name: Large Power Service Sector: Industrial Description: Source or reference: http://www.cemc.com/Files/LP-2%20Large%20Power%20Final%20-2012.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3

339

Data:C429527a-0f8a-4833-ac69-2baf0af3b3b6 | Open Energy Information  

Open Energy Info (EERE)

7a-0f8a-4833-ac69-2baf0af3b3b6 7a-0f8a-4833-ac69-2baf0af3b3b6 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Southeastern Power Admin Effective date: End date if known: Rate name: Wholesale Power Rate Schedule CC-1-I Sector: Commercial Description: Source or reference: http://199.44.84.82/files/CC-1-I.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous

340

Programmable Power Supply for MST...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

voltage of no more than 450 V. A commercial MOSFET gate driver with Undervoltage Lockout controls the shorting MOSFETS; when power to the gate board is removed, the...

Note: This page contains sample records for the topic "ac power voltage" from the National Library of EnergyBeta (NLEBeta).
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341

Data:304c7bdb-9ac5-4bea-ab51-af99e3f22ac3 | Open Energy Information  

Open Energy Info (EERE)

bdb-9ac5-4bea-ab51-af99e3f22ac3 bdb-9ac5-4bea-ab51-af99e3f22ac3 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Cuming County Public Pwr Dist Effective date: 2011/12/14 End date if known: Rate name: Security Lighting Unmetered Lights 400W MV Sector: Lighting Description: Source or reference: Ilinois State University Rate binder # 10 Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >>

342

Data:Cd66912f-ac4c-4a5f-ac64-750948dd9b7f | Open Energy Information  

Open Energy Info (EERE)

2f-ac4c-4a5f-ac64-750948dd9b7f 2f-ac4c-4a5f-ac64-750948dd9b7f No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Farmers' Electric Coop, Inc (New Mexico) Effective date: 2010/05/01 End date if known: Rate name: Small Commercial Sector: Commercial Description: Source or reference: Rate Binder#8 (Illinois State University) Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous

343

2.3-MW Medium-Voltage, Three-Level Wind Energy Inverter Applying a Unique Bus Structure and 4.5-kV Si/SiC Hybrid Isolated Power Modules: Preprint  

SciTech Connect (OSTI)

A high-efficiency, 2.3-MW, medium-voltage, three-level inverter utilizing 4.5-kV Si/SiC (silicon carbide) hybrid modules for wind energy applications is discussed. The inverter addresses recent trends in siting the inverter within the base of multimegawatt turbine towers. A simplified split, three-layer laminated bus structure that maintains low parasitic inductances is introduced along with a low-voltage, high-current test method for determining these inductances. Feed-thru bushings, edge fill methods, and other design features of the laminated bus structure provide voltage isolation that is consistent with the 10.4-kV module isolation levels. Inverter efficiency improvement is a result of the (essential) elimination of the reverse recovery charge present in 4.5-kV Si PIN diodes, which can produce a significant reduction in diode turn-off losses as well as insulated-gate bipolar transistor (IGBT) turn-on losses. The hybrid modules are supplied in industry-standard 140 mm x 130 mm and 190 mm x 130 mm packages to demonstrate direct module substitution into existing inverter designs. A focus on laminated bus/capacitor-bank/module subassembly level switching performance is presented.

Erdman, W.; Keller, J.; Grider, D.; VanBrunt, E.

2014-11-01T23:59:59.000Z

344

Power Right. Power Smart. Efficient Computer Power Supplies and Monitors. |  

Broader source: Energy.gov (indexed) [DOE]

Power Right. Power Smart. Efficient Computer Power Supplies and Power Right. Power Smart. Efficient Computer Power Supplies and Monitors. Power Right. Power Smart. Efficient Computer Power Supplies and Monitors. March 10, 2009 - 6:00am Addthis John Lippert Power supplies convert the AC power that you get from your electric company into the DC power consumed by most electronics, including your computer. We expect our power supplies to be safe, reliable, and durable. If they meet those criteria, then they're all alike, except for cost, right? Well, not exactly. You see, there's one other important feature that sets them apart: efficiency. And I don't know about you, but I believe waste is bad. For me, high efficiency is one important feature that's needed for something to be high quality. So isn't it ridiculous that most power

345

Power Right. Power Smart. Efficient Computer Power Supplies and Monitors. |  

Broader source: Energy.gov (indexed) [DOE]

Power Right. Power Smart. Efficient Computer Power Supplies and Power Right. Power Smart. Efficient Computer Power Supplies and Monitors. Power Right. Power Smart. Efficient Computer Power Supplies and Monitors. March 10, 2009 - 6:00am Addthis John Lippert Power supplies convert the AC power that you get from your electric company into the DC power consumed by most electronics, including your computer. We expect our power supplies to be safe, reliable, and durable. If they meet those criteria, then they're all alike, except for cost, right? Well, not exactly. You see, there's one other important feature that sets them apart: efficiency. And I don't know about you, but I believe waste is bad. For me, high efficiency is one important feature that's needed for something to be high quality. So isn't it ridiculous that most power

346

ABBGroup-1-High voltage lab  

E-Print Network [OSTI]

;©ABBGroup-3- 3-Sep-07 Where does one use circuit breakers? High voltage (HV) circuit breakers are keyA DISTRIBUTION MEDIUM AND LOW VOLTAGE HV circuit breakers #12;©ABBGroup-4- 3-Sep-07 When a breaker fails to interrupt the current... Fault arc at a disconnector Fault arc in a substation #12;©ABBGroup-5- 3-Sep-07

Basse, Nils Plesner

347

Temperature controlled high voltage regulator  

DOE Patents [OSTI]

A temperature controlled high voltage regulator for automatically adjusting the high voltage applied to a radiation detector is described. The regulator is a solid state device that is independent of the attached radiation detector, enabling the regulator to be used by various models of radiation detectors, such as gas flow proportional radiation detectors.

Chiaro, Jr., Peter J. (Clinton, TN); Schulze, Gerald K. (Knoxville, TN)

2004-04-20T23:59:59.000Z

348

Voltage Impacts of Utility-Scale Distributed Wind  

SciTech Connect (OSTI)

Although most utility-scale wind turbines in the United States are added at the transmission level in large wind power plants, distributed wind power offers an alternative that could increase the overall wind power penetration without the need for additional transmission. This report examines the distribution feeder-level voltage issues that can arise when adding utility-scale wind turbines to the distribution system. Four of the Pacific Northwest National Laboratory taxonomy feeders were examined in detail to study the voltage issues associated with adding wind turbines at different distances from the sub-station. General rules relating feeder resistance up to the point of turbine interconnection to the expected maximum voltage change levels were developed. Additional analysis examined line and transformer overvoltage conditions.

Allen, A.

2014-09-01T23:59:59.000Z

349

Savings Potential of ENERGY STAR(R) External Power Adapters andBattery Chargers  

SciTech Connect (OSTI)

External power adapters may lose 10 to 70 percent of theenergy they consume, dissipated as heat rather than converted into usefulenergy. Battery charging systems have more avenues for losses: inaddition to power conversion losses, power is consumed by the chargingcircuitry, and additional power may be needed after the battery is fullcharged to balance self-discharge. In 2005, the Environmental ProtectionAgency launched a new ENERGY STAR(R) label for external power supplies(EPSs) that convert line-voltage AC electricity into low-voltage DCelectricity for certain electronic devices. The specification includedpower supplies for products with battery charging functions (e.g. laptopsand cell phones), but excluded others. In January 2006, a separatespecification was issued for battery charging systems contained primarilyin small household appliances and power tools. In addition to the ENERGYSTAR(R) label, the state of California will implement minimum energyperformance standards for EPSs in 2007, and similar standards for EPSsand battery chargers are in development at the national level.Many of theproducts covered by these policies use relatively little power and havemodest per-unit savings potential compared to conventional energyefficiency targets. But with an estimated 1.5 billion adapters and 230million battery charging systems in use in the United States, theaggregate savings potential is quite high. This paper presents estimatesof the savings potential for external power adapters and battery chargingsystems through 2025.

Webber, Carrie; Korn, David; Sanchez, Marla

2007-02-28T23:59:59.000Z

350

SVC implementation using neural networks for an AC electrical railway  

Science Journals Connector (OSTI)

This paper presents an on-line method for implementation of a static var compensator (SVC) in a real ac autotransformer (AT)-fed electrical railway for reactive power compensation using Neural Networks (NN). Genetic algorithm (GA) can be the off-line ... Keywords: AC electrical railways load flow, forward/backward sweep (FBS), genetic algorithm (GA), neural network (NN), reactive power compensation, static var compensator (SVC)

Saeid Veysi Raygani; Bijan Moaveni; Seyed Saeed Fazel; Amir Tahavorgar

2011-05-01T23:59:59.000Z

351

Celebrate Earth Day with ACS  

Science Journals Connector (OSTI)

Celebrate Earth Day with ACS ... Winners of the ACS-sponsored Earth Day 2004 music video contest are reported. ... ACS resources for celebrating the Earth Day 2005 theme, "Air—Here, There, Everywhere", are discussed. ...

Erica K. Jacobsen

2005-03-01T23:59:59.000Z

352

Optimal design of AC filter circuits in HVDC converter stations  

SciTech Connect (OSTI)

This paper investigates the reactive power as well as the harmonic conditions on both the valve and the AC-network sides of a HVDC converter station. The effect of the AC filter circuits is accurately modeled. The program is then augmented by adding an optimization routine. It can identify the optimal filter configuration, yielding the minimum current distortion factor at the AC network terminals for a prespecified fundamental reactive power to be provided by the filter. Several parameter studies were also conducted to illustrate the effect of accidental or intentional deletion of one of the filter branches.

Saied, M.M.; Khader, S.A. [Kuwait Univ. (Kuwait). Electrical and Computer Engineering Dept.

1995-12-31T23:59:59.000Z

353

Data:698c9611-0ac7-4edb-9401-6c20b99c4f76 | Open Energy Information  

Open Energy Info (EERE)

c9611-0ac7-4edb-9401-6c20b99c4f76 c9611-0ac7-4edb-9401-6c20b99c4f76 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Elkhorn Rural Public Pwr Dist Effective date: 2013/01/01 End date if known: Rate name: RATE 61- Large Power--Single and Three Phase Sector: Industrial Description: AVAILABLE: In the general area served by the District from lines of 12,470 volts or less. APPLICABLE: To any customer whose entire requirements are taken through one meter under a contract of standard form. (Not applicable to resale, standby or auxiliary services.) CHARACTER OF SERVICE: 60 cycle, A.C., single or three phase at any of the District's standard voltages (12,470 volts or less) where the service may be supplied by a single power transformation.

354

Installation considerations for IGBT AC drives  

SciTech Connect (OSTI)

In the last four years, Adjustable Speed ac Drive (ASD) manufacturers have migrated from Bipolar Junction Transistor (BJT) semiconductors to Insulated Gate Bipolar Transistors (IGBTs) as the preferred Output switching device. The advantage of IGBTs over BJTs is that device rise and fall time switching capability is 5 - 10 times faster, resulting in lower device switching loss and a more efficient drive. However, for a similar motor cable length as the BJT drive, the faster output voltage risetime of the IGBT drive may increase the dielectric voltage stress on the motor and cable due to a phenomenon called reflected wave. Faster output dv/dt transitions of IGBT drives also increase the possibility for phenomenon such as increased Common Mode (CM) electrical noise, Electromagnetic Interference (EMI) problems and increased capacitive cable charging current problems. Also, recent experience suggests any Pulse Width Modulated (PWM) drive with a steep fronted output voltage wave form may increase motor shaft voltage and lead to a bearing current phenomenon known as fluting. This paper provides a basic understanding of these issues, as well as solutions, to insure a successful drive system installation.

Skibinski, G.L.

1997-06-01T23:59:59.000Z

355

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

SciTech Connect (OSTI)

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

356

High-voltage air-core pulse transformers  

SciTech Connect (OSTI)

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

357

Low voltage nonprimary explosive detonator  

DOE Patents [OSTI]

A low voltage, electrically actuated, nonprimary explosive detonator is disclosed wherein said detonation is achieved by means of an explosive train in which a deflagration-to-detonation transition is made to occur. The explosive train is confined within a cylindrical body and positioned adjacent to low voltage ignition means have electrical leads extending outwardly from the cylindrical confining body. Application of a low voltage current to the electrical leads ignites a self-sustained deflagration in a donor portion of the explosive train which then is made to undergo a transition to detonation further down the train.

Dinegar, Robert H. (Los Alamos, NM); Kirkham, John (Newbury, GB2)

1982-01-01T23:59:59.000Z

358

Provably minimal energy using coordinated DVS and power gating  

Science Journals Connector (OSTI)

Both energy and execution speed can be greatly impacted by clock and power gating, nonlinear voltage scaling, and leakage energy. We address the problem of coordinated power gating and dynamic voltage scaling (DVS) to minimize the overall energy consumption ...

Nathaniel A. Conos; Saro Meguerdichian; Foad Dabiri; Miodrag Potkonjak

2014-03-01T23:59:59.000Z

359

Low Insertion HVDC Circuit Breaker: Magnetically Pulsed Hybrid Breaker for HVDC Power Distribution Protection  

SciTech Connect (OSTI)

GENI Project: General Atomics is developing a direct current (DC) circuit breaker that could protect the grid from faults 100 times faster than its alternating current (AC) counterparts. Circuit breakers are critical elements in any electrical system. At the grid level, their main function is to isolate parts of the grid where a fault has occurred—such as a downed power line or a transformer explosion—from the rest of the system. DC circuit breakers must interrupt the system during a fault much faster than AC circuit breakers to prevent possible damage to cables, converters and other grid-level components. General Atomics’ high-voltage DC circuit breaker would react in less than 1/1,000th of a second to interrupt current during a fault, preventing potential hazards to people and equipment.

None

2012-01-09T23:59:59.000Z

360

Catalog of DC Appliances and Power Systems  

E-Print Network [OSTI]

en.wikipedia.org/wiki/Variable-frequency_drive. Garbesi,are generally powered by variable frequency drives.The typical variable frequency drive first rectifies the AC

Garbesi, Karina

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ac power voltage" 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

Data:207c7a63-587d-4998-ac93-d427f10beaf5 | Open Energy Information  

Open Energy Info (EERE)

587d-4998-ac93-d427f10beaf5 587d-4998-ac93-d427f10beaf5 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Kankakee Valley Rural E M C Effective date: 2012/05/01 End date if known: Rate name: Rate Schedule LPTOU: Large Power Time of Use Sector: Industrial Description: AVAILABILITY: This schedule is available to any member of the REMC located within the territory served by Kankakee Valley Rural Electric Membership Corporation that utilizes power on a year-round basis. Customers that use power less than nine months out of the year are served under rate schedules SP, SR, CSP, or SPTOU. APPLICATION: This schedule is applicable to all electric service required for lighting, power, and any other purpose requiring less than 1,000 kVA installed transformer capacity for which no other specific rate schedule is applicable. CHARACTER OF SERVICE: Service under this schedule shall be single phase or three phase, 60 Hertz, alternating current at the REMC's available standard voltages. All service required on the premises by the customer will be supplied through one meter. Standby or resale service is not permitted hereunder.

362

Saving Megawatts with Voltage Optimization  

E-Print Network [OSTI]

that had been installed at several electric utility distribution substations in the U.S. and Canada. These systems, being operated in Conservation Voltage Regulation mode, have provided significant energy conservation where they have been installed...

Wilson, T.; Bell, D.

2010-01-01T23:59:59.000Z

363

Transient Signal Analysis is a digital device testing method that is based on the analysis of volt-age transients at multiple test points. In this paper, the power supply transient signals from sim-  

E-Print Network [OSTI]

in 8-bit Multiplier Simulation Experiments Investigating the Use of Power Supply Transient SigAbstract Transient Signal Analysis is a digital device testing method that is based on the analysis of volt- age transients at multiple test points. In this paper, the power supply transient signals from

Plusquellic, James

364

Accelerator System Development at High Voltage Engineering  

SciTech Connect (OSTI)

Throughout the years, HVE has continuously extended the capabilities of its accelerator systems to meet the rising demands from a diverse field of applications, among which are deep level ion implantation, micro-machining, neutron production for biomedical research, isotope production or accelerator mass spectrometry. Characteristic for HVE accelerators is the coaxial construction of the all solid state power supply around the acceleration tubes. With the use of solid state technology, the accelerators feature high stability and very low ripple. Terminal voltages range from 1 to 6 MV for HVE Singletrons and Tandetrons. The high-current versions of these accelerators can provide ion beams with powers of several kW. In the last years, several systems have been built with terminal voltages of 1.25 MV, 2 MV and 5 MV. Recently, the first system based on a 6 MV Tandetron has passed the factory tests. In this paper we describe the characteristics of the HVE accelerator systems and present as example recent systems.

Klein, M. G.; Gottdang, A.; Haitsma, R. G.; Mous, D. J. W. [High Voltage Engineering Europa B.V., P.O. Box 99, Amersfoort 3800 AB (Netherlands)

2009-03-10T23:59:59.000Z

365

Annotated Bibliography of UHV AC Substation Equipment, 1968-1985.  

SciTech Connect (OSTI)

This bibliography is divided into sections dealing with insulation coordination, switchgear, shunt reactors, surge arresters, power transformers, current and voltage measurement equipment, station design and operating experience, and testing facilities. (DLC)

Lava, Val

1985-08-01T23:59:59.000Z

366

Microfabricated AC impedance sensor  

DOE Patents [OSTI]

A microfabricated instrument for detecting and identifying cells and other particles based on alternating current (AC) impedance measurements. The microfabricated AC impedance sensor includes two critical elements: 1) a microfluidic chip, preferably of glass substrates, having at least one microchannel therein and with electrodes patterned on both substrates, and 2) electrical circuits that connect to the electrodes on the microfluidic chip and detect signals associated with particles traveling down the microchannels. These circuits enable multiple AC impedance measurements of individual particles at high throughput rates with sufficient resolution to identify different particle and cell types as appropriate for environmental detection and clinical diagnostic applications.

Krulevitch, Peter (Pleasanton, CA); Ackler, Harold D. (Sunnyvale, CA); Becker, Frederick (Houston, TX); Boser, Bernhard E. (Berkeley, CA); Eldredge, Adam B. (Austin, TX); Fuller, Christopher K. (Livermore, CA); Gascoyne, Peter R. C. (Bellaire, TX); Hamilton, Julie K. (Tracy, CA); Swierkowski, Stefan P. (Livermore, CA); Wang, Xiao-Bo (San Diego, CA)

2002-01-01T23:59:59.000Z

367

Data:55078b90-77aa-45e5-9897-745ed4ac476b | Open Energy Information  

Open Energy Info (EERE)

-77aa-45e5-9897-745ed4ac476b -77aa-45e5-9897-745ed4ac476b No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Whitewater Valley Rural EMC Effective date: 2010/05/01 End date if known: Rate name: Schedule SP - Small Power Service (Multi Phase) Sector: Commercial Description: AVAILABILITY Available to members of the REMC whose maximum load requirements do not exceed 100 KVA transformer capacity for single-phase. Transformer capacity maximum is not applicable to three-phase; however, regardless of service provided, customers whose 12-month average demand exceeds 100 kW will automatically be transferred to the appropriate rate. The minimum monthly demand is 10kW. TYPE OF SERVICE Alternating current, 60-hertz, single phase, 120/240 volts; or three-phase, 240 volts or other standard voltage values mutually agreeable to the member and the REMC. Standard voltage values mutually agreeable to the member and the REMC. Standby or resale service is not permitted under this rate schedule.

368

Data:F96ac3e8-89af-42ed-af3b-e45b3976a771 | Open Energy Information  

Open Energy Info (EERE)

ac3e8-89af-42ed-af3b-e45b3976a771 ac3e8-89af-42ed-af3b-e45b3976a771 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: GreyStone Power Corporation Effective date: 2011/08/01 End date if known: Rate name: Residential Farm Service Sector: Residential Description: Source or reference: http://www.greystonepower.com/UploadedFiles/pdf/residential%20farm%20service%20rate.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring:

369

Data:625d2ac7-cae9-4da4-a652-339bcb92c7b7 | Open Energy Information  

Open Energy Info (EERE)

ac7-cae9-4da4-a652-339bcb92c7b7 ac7-cae9-4da4-a652-339bcb92c7b7 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Paulding-Putman Elec Coop, Inc Effective date: 2012/01/01 End date if known: Rate name: Industrial Service Power 2 Sector: Industrial Description: Source or reference: www.ppec.coop/pdf/2012_rates_terms.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous

370

Data:7fb75ac1-2a7e-4b4a-b21e-c51764137a9e | Open Energy Information  

Open Energy Info (EERE)

7fb75ac1-2a7e-4b4a-b21e-c51764137a9e 7fb75ac1-2a7e-4b4a-b21e-c51764137a9e No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: New York Power Authority Effective date: 2013/07/01 End date if known: Rate name: SC 68 Conventional (Westchester Customers) Sector: Commercial Description: Source or reference: http://www.nypa.gov/about/documents.htm Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >>

371

Data:C02dc9c9-d0f3-4699-ac09-11a7073d049a | Open Energy Information  

Open Energy Info (EERE)

c9-d0f3-4699-ac09-11a7073d049a c9-d0f3-4699-ac09-11a7073d049a No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Pontotoc Electric Power Assn Effective date: 2013/07/01 End date if known: Rate name: Security Light MV 175 W 35' pole Sector: Lighting Description: Source or reference: http://www.sitemason.com/files/fjDo1q/May%202012.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >>

372

Data:52791b05-7fa0-4c97-b4ac-efca490e3b51 | Open Energy Information  

Open Energy Info (EERE)

91b05-7fa0-4c97-b4ac-efca490e3b51 91b05-7fa0-4c97-b4ac-efca490e3b51 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Alabama Power Co Effective date: 2009/01/01 End date if known: Rate name: 150W METAL HALIDE FLOODLIGHT Sector: Lighting Description: Source or reference: http://www.alabamapower.com/pricing/pdf/FPL.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous

373

Data:Db27ecb1-9a58-4d98-a11b-ac86f49ab85d | Open Energy Information  

Open Energy Info (EERE)

ecb1-9a58-4d98-a11b-ac86f49ab85d ecb1-9a58-4d98-a11b-ac86f49ab85d No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Custer Public Power District Effective date: 2013/01/01 End date if known: Rate name: RURAL ELECTRIC SPACE HEATING SERVICE - RATE CLASS 43 Sector: Commercial Description: Source or reference: http://www.custerpower.com/2012_Rates.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous

374

Data:2151ca28-21c3-4237-ac90-771e44f161ab | Open Energy Information  

Open Energy Info (EERE)

8-21c3-4237-ac90-771e44f161ab 8-21c3-4237-ac90-771e44f161ab No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Pontotoc Electric Power Assn Effective date: 2013/07/01 End date if known: Rate name: Flood Light MH 400 W 35' pole Sector: Lighting Description: Source or reference: http://www.sitemason.com/files/fjDo1q/May%202012.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >>

375

An Ensemble Empirical Mode Decomposition Approach for Voltage Sag Detection in a Smart Grid Context  

E-Print Network [OSTI]

An Ensemble Empirical Mode Decomposition Approach for Voltage Sag Detection in a Smart Grid Context Yassine Amirat1,2 , Mohamed Benbouzid2 , Tianzhen Wang3 and Sylvie Turri2 Abstract­Smart grids have become, using the instantaneous power for voltage sags detection in smart grids. Copyright © 2013 Praise Worthy

Brest, Université de

376

Hydroelectric Voltage Generation Based on Water-Filled Single-Walled Carbon Nanotubes  

Science Journals Connector (OSTI)

Hydroelectric Voltage Generation Based on Water-Filled Single-Walled Carbon Nanotubes ... The hydroelectric voltage generator can be expressed by the model illustrated in Figure 6a and b. ... Individual water-filled single-walled carbon nanotubes as hydroelectric power converters ...

Quanzi Yuan; Ya-Pu Zhao

2009-04-21T23:59:59.000Z

377

A genetic algorithm approach to voltage-VAR control in systems with distributed generation  

Science Journals Connector (OSTI)

This paper presents a case study that highlights the influences which the connection of distributed generation sources may have over the solutions of reactive power compensation and voltage control already existing in a given network. The problem of ... Keywords: distributed generation, genetic algorithms, renewable sources, voltage-var control

Iulia Coroama; Mihai Gavrilas; Ovidiu Ivanov

2010-10-01T23:59:59.000Z

378

RTDS-Based Design and Simulation of Distributed P-Q Power Resources in Smart Grid  

E-Print Network [OSTI]

in a distribution substation," IEEE Trans. on Power Systems,power peak load shaving at substation, reactive power peakload shaving at iv substation, and voltage regulation. We

Taylor, Zachariah David

2014-01-01T23:59:59.000Z

379

Data:64f25be4-f5e6-4cd7-8f3d-809fcb7ac8b2 | Open Energy Information  

Open Energy Info (EERE)

f5e6-4cd7-8f3d-809fcb7ac8b2 f5e6-4cd7-8f3d-809fcb7ac8b2 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Southeastern Power Admin Effective date: End date if known: Rate name: Wholesale Power Rate Schedule CP&L-4-B Sector: Commercial Description: Source or reference: http://199.44.84.82/files/CP&L-4-B.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous 1 2 3 Next >> << Previous

380

Data:Fc5d3d19-6ac8-4cdc-96b0-954b69f2b786 | Open Energy Information  

Open Energy Info (EERE)

d19-6ac8-4cdc-96b0-954b69f2b786 d19-6ac8-4cdc-96b0-954b69f2b786 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Pontotoc Electric Power Assn Effective date: 2013/07/01 End date if known: Rate name: General Power Service GSA (Under 50 kW) Single-Phase Sector: Commercial Description: Source or reference: http://www.sitemason.com/files/fjDo1q/May%202012.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring:

Note: This page contains sample records for the topic "ac power voltage" 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

Data:88a88b2d-fbc8-45ea-a9f5-d235ac61d267 | Open Energy Information  

Open Energy Info (EERE)

d-fbc8-45ea-a9f5-d235ac61d267 d-fbc8-45ea-a9f5-d235ac61d267 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Kankakee Valley Rural E M C Effective date: 2012/05/01 End date if known: Rate name: Rate Schedule GS: General Service Non-Demand Electric Rate Schedule Sector: Commercial Description: AVAILABILITY: This schedule is available to any member of the REMC located within the territory served by Kankakee Valley Rural Electric Membership Corporation that utilizes power on a year-round basis. Customers that use power less than nine months out of the year are served under rate schedules SP, SR, CSP, or SPTOU. APPLICATION: This schedule is applicable to all single phase farm and small commercial electric service required for lighting, power and any other purpose for which no other specific rate is applicable. CHARACTER OF SERVICE: Service under this schedule shall be single phase, 60 Hertz, alternating current at the REMC's available standard voltages. All electric service required on the premises by the customer will be supplied through one meter. Standby or resale service is not permitted hereunder.

382

Three phase AC motor controller  

DOE Patents [OSTI]

A motor controller for a three phase AC motor (10) which is adapted to operate bidirectionally from signals received either from a computer (30) or a manual control (32). The controller is comprised of digital logic circuit means which implement a forward and reverse command signal channel (27, 29) for the application of power through the forward and reverse power switching relays (16, 18, 20, 22). The digital logic elements are cross coupled to prevent activation of both channels simultaneously and each includes a plugging circuit (65, 67) for stopping the motor upon the removal of control signal applied to one of the two channels (27, 29) for a direction of rotation desired. Each plugging circuit (65, 67) includes a one-shot pulse signal generator (88, 102) which outputs a single pulse signal of predetermined pulsewidth which is adapted to inhibit further operation of the application of power in the channel which is being activated and to apply a reversal command signal to the other channel which provides a reversed phase application of power to the motor for a period defined by the pulse-width output of the one-shot signal generator to plug the motor (10) which will then be inoperative until another rotational command signal is applied to either of the two channels.

Vuckovich, Michael (Elizabeth, PA); Wright, Maynard K. (Bethel Park, PA); Burkett, John P. (South Huntington Township, Westmoreland County, PA)

1984-03-20T23:59:59.000Z

383

Non-Federal Participation In Ac Intertie Final Environmental Impact Statement  

Broader source: Energy.gov (indexed) [DOE]

Non-Federal Participation In Ac Intertie Non-Federal Participation In Ac Intertie Final Environmental Impact Statement Volume 1: Environmental Analysis Bonneville DOE/eis-0145 POWER ADMINISTRATION January 1994 Non-Federal Participation in AC Intertie Final Environmental Impact Statement (DOE/EIS - 0145) Responsible Agency: U.S. Department of Energy, Bonneville Power Administration (BPA) Title of Proposed Action: Non-Federal Participation in AC Intertie States and Other Areas Involved: Washington, Oregon, Idaho, Montana, California, Nevada, Utah, New Mexico, Arizona, Wyoming, British Columbia Abstract: BPA is considering action in two areas: (1) non-Federal access to

384

www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY  

E-Print Network [OSTI]

www.eprg.group.cam.ac.uk EPRGWORKINGPAPERNON-TECHNICALSUMMARY Nuclear Energy in the Enlarged in central and eastern Europe for nuclear power. This working paper notes that with the addition of 12 new significantly in favour of nuclear power. Furthermore several of these central and eastern EU countries have

Aickelin, Uwe

385

Voltage Control Devices on the IEEE 8500 Node Test Feeder  

SciTech Connect (OSTI)

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

386

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

387

IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 8, NO. 1, FEBRUARY 1993, PP. 1 8. POINT OF COLLAPSE AND CONTINUATION METHODS FOR LARGE  

E-Print Network [OSTI]

HVDC transmission, area interchange power control, regulating transformers, and voltage and reactive

Cañizares, Claudio A.

388

Design of the Wireless Temperature Measurement Alarming System in the High-Voltage Transformer Substation  

Science Journals Connector (OSTI)

Due to electric power overload and equipment aging, fire and explosion occur at transmission circuitry joints in high-voltage transformer substation caused by high temperatures accumulated at these...

Qiang Gao; Hongli Wang; Huaxiang Wang

2008-01-01T23:59:59.000Z

389

ABBGroup-1-High voltage lab  

E-Print Network [OSTI]

A DISTRIBUTION MEDIUM AND LOW VOLTAGE HV circuit breakers #12;©ABBGroup-4- 3-Sep-07 When a breaker fails to interrupt the current... Fault arc at a disconnector Fault arc in a substation #12;©ABBGroup-5- 3-Sep-07/costs A detailed understanding of arc physics and fluid dynamics is necessary for the development of HV circuit

Basse, Nils Plesner

390

Current vs. Voltage Feedback Amplifiers  

E-Print Network [OSTI]

?' In most applications, the differences between current feedback (CFB) and voltage feedback (VFB) are not apparent. Today's CFB and VFB amplifiers have comparable performance, but there are cer- tain unique Performance · Feedback Freedom Aside from the well-known attribute of CFB amplifiers, gain

Lanterman, Aaron

391

Modulated voltage metastable ionization detector  

SciTech Connect (OSTI)

Metastable ionization detectors used for chromatographic analysis usually employa fixed high voltage for the ionization potential. For this reason, the operating range is limited to about three orders of magnitude. By use of the technique disclosed in the instant invention, operating ranges of about nine orders of magnitude are obtained. The output current from a metastable ionization detector (MID) is applied to a modulation voltage circuit. An adjustment is made to balance out the background current, and an output current, above background, is applied to an input of a strip chart recorder. For low level concentrations, i.e., low detected output current, the ionization potential will be at a maximum and the metastable ionization detector will operate at its most sensitive level. When the detected current from the metastable ionization detector increases above a predetermined threshold level, a voltage control circuit is activated which turns on a high voltage transistor which acts to reduce the ionization potential. The ionization potential applied to the metastable ionization detector is then varied so as to maintain the detected signal level constant. The variation in ionization potential is now related to the concentration fo the constituent and a representative amplitude is applied to another input of said strip chart recorder.

Carle, G. C.; Humphry, D. E.; Kojiro, D. R.

1985-08-27T23:59:59.000Z

392

Data:40e2e271-26d2-47e3-9a6e-59ac46f56c6d | Open Energy Information  

Open Energy Info (EERE)

e271-26d2-47e3-9a6e-59ac46f56c6d e271-26d2-47e3-9a6e-59ac46f56c6d No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Perennial Public Power Dist Effective date: 2013/01/01 End date if known: Rate name: FARM AND RURAL RESIDENTIAL Single Phase Sector: Residential Description: AVAILABILITY: To rural residences with less than 150 kVA transformer capacity where usage is provided for domestic and farm use, and all service is provided through one meter. TYPE OF SERVICE: A.C., 60 cycles, single-phase or three-phase at any of the District's standard voltages. Energy Charge = Purchased Power + Distribution Delivery

393

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

SciTech Connect (OSTI)

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

394

Discrete sliding mode control strategy for direct real and reactive power regulation of wind driven DFIG  

Science Journals Connector (OSTI)

Abstract This paper investigates a discrete sliding mode control (DSMC) strategy for direct real and reactive power regulation for wind driven doubly fed induction generator (DFIG). The real and reactive power errors are eliminated by directly calculating the rotor control voltages through DSMC. In the stator stationary reference frame, direct real and reactive power control strategy is implemented. Therefore, it does not require the angular information of the stator and rotor currents or voltages. It does not involve any extra current loops which results into simple design. The use of constant converter switching frequency via space vector pulse width modulation eases the AC harmonic filter design and improves the power quality. The use of fast and flexible discrete controller makes the system competent with modern digital world. Detailed simulations have been carried out to validate the method. The simulation results reveal that the real and reactive power references are followed smoothly even in the presence of speed perturbations and performance of the system is robust against parameter variations and system disturbances.

V.N. Pande; U.M. Mate; Shailaja Kurode

2013-01-01T23:59:59.000Z

395

Electromagnetic power loss in open coaxial diodes and the Langmuir-Blodgett law  

SciTech Connect (OSTI)

The space charge limited current in coaxial diodes with electromagnetic power loss is studied. The Langmuir-Blodgett law is expressed in terms of the electromagnetic power loss and the applied voltage. Particle-in-cell simulations of photodiode-like situations and high power diodes confirm the relation between the applied voltage, diode voltage, and electromagnetic power loss.

Kumar, Raghwendra; Biswas, Debabrata [Theoretical Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India)

2010-10-15T23:59:59.000Z

396

Thermal Analysis and Optimization of 2.5-D Integrated Voltage Regulator  

E-Print Network [OSTI]

losses in the power distribution network, and by enabling power management with greater temporal at higher voltages, reducing resistive losses in the power distri- bution network, and by enabling fine in the IC and the inductor placed inside the interposer generate significant heat and affect the performance

Lim, Sung Kyu

397

Small-Signal Modeling of a Three-Phase Isolated Inverter with Both Voltage and  

E-Print Network [OSTI]

with the introduction of modern power generating units such as wind and solar power plants. As these new energy sourcesSmall-Signal Modeling of a Three-Phase Isolated Inverter with Both Voltage and Frequency Droop Rolla, Missouri 65409 Abstract-- In conventional power system operation, droop control methods are used

Kimball, Jonathan W.

398

Efficient Switches for Solar Power Conversion: Four Quadrant GaN Switch Enabled Three Phase Grid-Tied Microinverters  

SciTech Connect (OSTI)

Solar ADEPT Project: Transphorm is developing power switches for new types of inverters that improve the efficiency and reliability of converting energy from solar panels into useable electricity for the grid. Transistors act as fast switches and control the electrical energy that flows in an electrical circuit. Turning a transistor off opens the circuit and stops the flow of electrical current; turning it on closes the circuit and allows electrical current to flow. In this way a transistor can be used to convert DC from a solar panel into AC for use in a home. Transphorm’s transistors will enable a single semiconductor device to switch electrical currents at high-voltage in both directions—making the inverter more compact and reliable. Transphorm is using Gallium Nitride (GaN) as a semiconductor material in its transistors instead of silicon, which is used in most conventional transistors, because GaN transistors have lower losses at higher voltages and switching frequencies.

None

2012-02-13T23:59:59.000Z

399

Power Integrations Inc | Open Energy Information  

Open Energy Info (EERE)

Integrations Inc Jump to: navigation, search Name: Power Integrations Inc Place: San Jose, California Zip: 95138 Product: Supplier of high-voltage analog integrated circuits used...

400

Models for Architectural Power and Power Grid Noise Analysis on Data Bus  

Science Journals Connector (OSTI)

The transition activity...on a data bus is a time series that determines power consumption on this data bus. The average values of power consumption and power grid voltage drop are proportional to average value.....

Lijun Gao; Keshab K. Parhi

2006-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "ac power voltage" 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

Hybrid switch for resonant power converters  

DOE Patents [OSTI]

A hybrid switch comprising two semiconductor switches connected in parallel but having different voltage drop characteristics as a function of current facilitates attainment of zero voltage switching and reduces conduction losses to complement reduction of switching losses achieved through zero voltage switching in power converters such as high-current inverters.

Lai, Jih-Sheng; Yu, Wensong

2014-09-09T23:59:59.000Z

402

ACS | Open Energy Information  

Open Energy Info (EERE)

ACS ACS Jump to: navigation, search Name ACS Place Madrid, Spain Zip 28036 Sector Solar Product Madrid based construction company involved in the development of solar thermal projects. Coordinates 40.4203°, -3.705774° 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":40.4203,"lon":-3.705774,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

403

AC | OpenEI  

Open Energy Info (EERE)

AC AC Dataset Summary Description The following data-set is for a benchmark residential home for all TMY3 locations across all utilities in the US. The data is indexed by utility service provider which is described by its "unique" EIA ID ( Source National Renewable Energy Laboratory Date Released April 05th, 2012 (2 years ago) Date Updated April 06th, 2012 (2 years ago) Keywords AC apartment CFL coffeemaker Computer cooling cost demand Dishwasher Dryer Furnace gas HVAC Incandescent Laptop load Microwave model NREL Residential television tmy3 URDB Data text/csv icon Residential Cost Data for Common Household Items (csv, 14.5 MiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Annually Time Period License License Open Data Commons Public Domain Dedication and Licence (PDDL)

404

Electrochimica Acta 51 (2005) 943951 Tin oxide nanosensor fabrication using AC dielectrophoretic  

E-Print Network [OSTI]

into the microchannel. An alternating (AC) voltage of 9.8 V peak to peak, with variable frequency, was applied between, Room 321 Love Building, 771, Ferst Drive, Atlanta, GA 30332, USA b School of Materials Science a Maxwell­ Wagner interfacial polarization at a frequency determined by the relationship between the complex

Wang, Zhong L.

405

Monitoring voltage collapse margin with synchrophasors across transmission corridors with multiple lines and multiple contingencies  

E-Print Network [OSTI]

We use synchrophasor measurements of the complex voltage and current at both ends of multiple transmission lines that connect areas of a power system to monitor the online voltage collapse margin. A new reduction is used to reduce the multiple transmission lines to a single line equivalent and determine how to combine the synchrophasor measurements. Generator reactive power limits can be accommodated. The results show that this methodology can capture the effect of multiple contingencies inside the transmission corridors, giving awareness to the operators about the severity of contingencies with respect to voltage stability.

Ramirez, Lina

2014-01-01T23:59:59.000Z

406

Technical and environmental aspects of electric power transmission  

SciTech Connect (OSTI)

This document summarizes the salient aspects of power systems and transmission-line technology and the effects of power-line construction and operation on human health and the environment. Major components of power systems are identified from the level of the individual consumer to that of the power pool, including the distribution, subtransmission, transmission, and power pool levels. This is followed by descriptions of the constituent parts and construction of power lines and the operational requirements and features of power lines and systems. Examples of topics include structure and conductor types, design, and selection; switching station and substation design and operation; and transmission line construction and upgrading. Emphasis is on the operational characteristics of transmission lines and of power systems and pools, including conductor and line parameters, insulation, faults, fault protection, electromagnetic field phenomena, corona phenomena, conductor motion, undesirable voltage levels, compensation, system protection, and system stability, reliability, and adequacy. Overhead dc lines, underground lines, and regulations and safety codes pertaining to power lines are briefly discussed. Environmental effects discussed include those stemming from route selection, clearing and construction, power-line operation, right-of-way maintenance, and the physical presence of structures. Examples of specific topics include visual and ecological criteria for route selection; right-of-way acquisition and land-use rights; effects of construction on soils, vegetation, and wildlife; impacts of right-of-way maintenance with herbicides or by cutting; types and use of herbicides; and power-line structure interference with TV reception and bird migration. Finally, the environmental impacts of the construction and operation of ac and dc underground lines are discussed.

Kroodsma, R.L.; Van Dyke, J.W.

1985-05-01T23:59:59.000Z

407

ETA-AC002  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2 2 Revision 2 Effective March 1, 1997 "Control of Test Conduct" Prepared by Electric Transportation Applications Prepared by: _______________________________ Date:__________ Jude M. Clark Approved by: _________________________________________________ Date: _______________ Donald B. Karner Procedure ETA-AC002 Revision 2 2 ©1997 Electric Transportation Applications All Rights Reserved TABLE OF CONTENTS 1.0 Objectives 3 2.0 Purpose 3 3.0 Documentation 3 4.0 Initial Conditions and Prerequisites 4 5.0 Personnel Qualifications 5 6.0 Activity Requirements 6 7.0 Supplemental Activity Requirements 8 8.0 Glossary 9 9.0 References 10 Procedure ETA-AC002 Revision 2 3 ©1997

408

ETA-AC006  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

6 6 Revision 2 Effective: March 1, 1997 Vehicle Verification Prepared by Electric Transportation Applications Prepared by: _______________________________ Date:__________ Jude M. Clark Approved by: _________________________________________________ Date: ______________ Donald B. Karner ETA-AC006 Revision 2 2 ©1997 Electric Transportation Applications All Rights Reserved TABLE OF CONTENTS 1.0 Objectives 3 2.0 Purpose 3 3.0 Documentation 3 4.0 Initial Conditions and Prerequisites 4 5.0 Verification Requirements 5 6.0 Glossary 11 7.0 References 12 Appendices Appendix A - Manufacturer's Proposal Review Check List 13 Appendix B - Vehicle Receipt Check List 18 ETA-AC006 Revision 2 3

409

Non-Federal Participation in AC Intertie Final Environmental Impact Statement Volume2:Appendices  

Broader source: Energy.gov (indexed) [DOE]

Non-Federal Participation in AC Intertie Final Non-Federal Participation in AC Intertie Final Environmental Impact Statement Volume2:Appendices Bonneville DOE/eis- 0145 POWER ADMINISTRATION January 1994 Non-Federal Participation in AC Intertie Draft Environmental Impact Statement Table of Contents Appendix A Life-of-Facilities Capacity Ownership Proposal A1 Appendix B Long-Term Intertie Access Policy B1 Appendix C Glossary C1 Appendix D Biological Assessment ad Supporting Materials

410

Data:537e7901-a057-48d1-ac7a-c08908a00772 | Open Energy Information  

Open Energy Info (EERE)

-a057-48d1-ac7a-c08908a00772 -a057-48d1-ac7a-c08908a00772 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of Jasper, Indiana (Utility Company) Effective date: 2009/09/01 End date if known: Rate name: Municipal Street Light (400 W Mercury Vapor) Sector: Lighting Description: Applicable only for street, alley and park lighting and traffic signals of the City of Jasper. Source or reference: ISU Documentation Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V):

411

Data:E710dbca-01f1-41b8-a2ac-9680233ac368 | Open Energy Information  

Open Energy Info (EERE)

dbca-01f1-41b8-a2ac-9680233ac368 dbca-01f1-41b8-a2ac-9680233ac368 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of Stafford, Kansas (Utility Company) Effective date: End date if known: Rate name: E6 - 155 Horsepower Sector: Commercial Description: Source or reference: https://cas.sharepoint.illinoisstate.edu/grants/Sunshot/Lists/DATA%20ENTRY%20Rates%20Collected/Attachments/627/rate%20information%20for%20Stafford.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V):

412

?-Conotoxin KIIIA Derivatives with Divergent Affinities versus Efficacies in Blocking Voltage-Gated Sodium Channels  

Science Journals Connector (OSTI)

Because of their facile chemical synthesis, KIIIA analogues that had as a core structure the disulfide-depleted KIIIA[C1A,C2U,C9A,C15U] (where U is selenocysteine) or ddKIIIA were used. ... Abbreviations: dap, diaminoproprionate; ddKIIIA, disulfide-depleted ?-conotoxin KIIIA, i.e., KIIIA[C1A,C2U,C9A,C5U], where U is selenocysteine; ddKIIIA[K7X], ddKIIIA with residue X in position 7; ddKIIIA·NaV, binary complex of ddKIIIA and NaV; ddKIIIA[K7X]·NaV, binary complex of ddKIIIA[K7X] and NaV; ddKIIIA[K7X]·TTX·NaV, ternary complex of ddKIIIA[K7X], TTX, and NaV; GIIIA, ?-conotoxin GIIIA; INa, sodium current; KIIIA, ?-conotoxin KIIIA; KIIIA[K7A], ?-conotoxin KIIIA[K7A]; NaV, ?-subunit of the voltage-gated sodium channel; rINa, residual sodium current; TTX, tetrodotoxin; TTX·NaV, binary complex of TTX and NaV; VGSC, voltage-gated sodium channel. ... The long moniker of ddKIIIA[K7X] is KIIIA[C1A,C2U,K7X,C9A,C15U], where residue X at position 7 was either Ala, Asp, Gly, Leu, Lys (i.e., ddKIIIA), Phe, Ser, Thr, Val, or diaminoproprionate (dap). ...

Min-Min Zhang; Tiffany S. Han; Baldomero M. Olivera; Grzegorz Bulaj; Doju Yoshikami

2010-05-11T23:59:59.000Z

413

Power conversion apparatus and method  

DOE Patents [OSTI]

A power conversion apparatus includes an interfacing circuit that enables a current source inverter to operate from a voltage energy storage device (voltage source), such as a battery, ultracapacitor or fuel cell. The interfacing circuit, also referred to as a voltage-to-current converter, transforms the voltage source into a current source that feeds a DC current to a current source inverter. The voltage-to-current converter also provides means for controlling and maintaining a constant DC bus current that supplies the current source inverter. The voltage-to-current converter also enables the current source inverter to charge the voltage energy storage device, such as during dynamic braking of a hybrid electric vehicle, without the need of reversing the direction of the DC bus current.

Su, Gui-Jia (Knoxville, TN)

2012-02-07T23:59:59.000Z

414

Pasadena Water and Power - Solar Power Installation Rebate | Department of  

Broader source: Energy.gov (indexed) [DOE]

Pasadena Water and Power - Solar Power Installation Rebate Pasadena Water and Power - Solar Power Installation Rebate Pasadena Water and Power - Solar Power Installation Rebate < Back Eligibility Commercial Institutional Local Government Nonprofit Residential State Government Savings Category Solar Buying & Making Electricity Program Info State California Program Type Utility Rebate Program Rebate Amount Systems up to 30 kW have the option of receiving an expected performance based buydown (EPBB) or a performance based incentive (PBI). Systems larger than 30 kW are only eligible for the PBI. EPBB (effective 6/1/12): Residential: $1.40/watt AC Commercial and all PPAs: $0.85/watt AC Non-profits and Government: $1.60/watt AC Income-qualified residential: $4.00/watt PBI (effective 6/1/12): Residential: $0.212/kWh Commercial and all PPAs: $0.129/kWh

415

Dynamic performance of static and synchronous compensators at an HVDC inverter bus in a very weak AC system  

SciTech Connect (OSTI)

This paper discusses the performance of dynamic voltage control devices at the inverters of very weak ac systems. The types of compensation considered are: (a) static var compensator (SVC), (b) synchronous compensator (SC), (c) a mix of the two and (d) fixed capacitors. Although the primary purpose of these compensators is to control voltage at the ac bus, their dynamic performance during system disturbances is a very important factor. The investigation includes the behavior of the various voltage control options under ac and dc disturbances. The paper shows that the SVC has the fastest response for load rejection type of overvoltages, but can cause serious problems with recovery during undervoltages caused by single phase faults. The CIGRE benchmark model for HVdc control studies has been modified and used in this study. In particular the effect of local load has been included.

Nayak, O.B.; Gole, A.M. (Univ. of Manitoba, Winnipeg (Canada)); Chapman, D.G.; Davies, J.B. (Manitoba Hydro, Winnipeg (Canada))

1994-08-01T23:59:59.000Z

416

Automatic Voltage Control of Electrical Systems  

Science Journals Connector (OSTI)

... to have complete automatic voltage regulation and it also has supervisory control for its main substations. By a careful application of automatically controlled regulators it is shown that the voltage ...

1934-01-20T23:59:59.000Z

417

Implications of Pulser Voltage Ripple  

SciTech Connect (OSTI)

In a recent set of measurements obtained by G. Kamin, W. Manning, A. Molvik, and J. Sullivan, the voltage waveform of the diode pulser had a ripple of approximately {+-}1.3% of the 65 kV flattop voltage, and the beam current had a larger corresponding ripple of approximately {+-}8.4% of the 1.5 mA average current at the location of the second Faraday cup, approximately 1.9 m downstream from the ion source. The period of the ripple was about 1 {mu}s. It was initially unclear whether this large current ripple was in fact a true measurement of the current or a spurious measurement of noise produced by the pulser electronics. The purpose of this note is to provide simulations which closely match the experimental results and thereby corroborate the physical nature of those measurements, and to provide predictions of the amplitude of the current ripples as they propagate to the end of linear transport section. Additionally analytic estimates are obtained which lend some insight into the nature of the current fluctuations and to provide an estimate of what the maximum amplitude of the current fluctuations are expected to be, and conversely what initial ripple in the voltage source is allowed, given a smaller acceptable tolerance on the line charge density.

Barnard, J J

2011-12-21T23:59:59.000Z

418

Electrical voltages and resistances measured to inspect metallic cased wells and pipelines  

DOE Patents [OSTI]

A cased well in the earth is electrically energized with A.C. current. Voltages are measured from three voltage measurement electrodes in electrical contact with the interior of the casing while the casing is electrically energized. In a measurement mode, A.C. current is conducted from a first current carrying electrode within the cased well to a remote second current carrying electrode located on the surface of the earth. In a calibration mode, current is passed from the first current carrying electrode to a third current carrying electrode located vertically at a different position within the cased well, where the three voltage measurement electrodes are located vertically in between the first and third current carrying electrodes. Voltages along the casing and resistances along the casing are measured to determine wall thickness and the location of any casing collars present so as to electrically inspect the casing. Similar methods are employed to energize a pipeline to measure the wall thickness of the pipeline and the location of pipe joints to electrically inspect the pipeline.

Vail, III, William Banning (Bothell, WA); Momii, Steven Thomas (Seattle, WA)

2000-01-01T23:59:59.000Z

419

Electrical voltages and resistances measured to inspect metallic cased wells and pipelines  

DOE Patents [OSTI]

A cased well in the earth is electrically energized with A.C. current. Voltages are measured from three voltage measurement electrodes in electrical contact with the interior of the casing while the casing is electrically energized. In a measurement mode, A.C. current is conducted from a first current carrying electrode within the cased well to a remote second current carrying electrode located on the surface of the earth. In a calibration mode, current is passed from the first current carrying electrode to a third current carrying electrode located vertically at a different position within the cased well, where the three voltage measurement electrodes are located vertically in between the first and third current carrying electrodes. Voltages along the casing and resistances along the casing are measured to determine wall thickness and the location of any casing collars present so as to electrically inspect the casing. Similar methods are employed to energize a pipeline to measure the wall thickness of the pipeline and the location of pipe joints to electrically inspect the pipeline.

Vail, III, William Banning (Bothell, WA); Momii, Steven Thomas (Seattle, WA)

2001-01-01T23:59:59.000Z

420

Onset voltage of corona on coated conductors  

SciTech Connect (OSTI)

This paper is aimed for investigating the effect of surface coating on the positive and negative onset voltages of corona from stressed conductor as a pre-requisite for onset-voltage calculation. The electric field is accurately calculated by the charge simulation technique. The calculated onset voltages agreed satisfactorily with those measured experimentally for bare conductors. The effect of coating-layer thickness and permittivity as well as conductor radius and height on the onset-voltage values is discussed.

Abdel-Salam, M. [Assiut Univ. (Egypt). Electrical Engineering Dept.; Abo-Shal, Y. [SCECO-East, Dammam (Saudi Arabia). Electrical Engineering Div.

1995-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "ac power voltage" 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

STATCOM-based voltage and frequency regulator for stand-alone asynchronous generator  

Science Journals Connector (OSTI)

This paper presents a STATCOM-based voltage and frequency regulation for stand-alone asynchronous generator feeding linear and nonlinear loads. The SEIG have inherent poor voltage and frequency regulation. The voltage and frequency depend upon the load current and power factor of the load with fixed excitation capacitor employing unregulated turbines. The changing consumer load requires variable reactive power compensation for excitation requirement. Consumer load contains harmonics and performance of SEIG is largely affected by these load harmonics. A current controlled voltage source inverter working as STATCOM is used for harmonic elimination, load balancing and variable reactive power compensation. A DC chopper with dump load is connected across DC bus capacitor to regulate varying consumer load. The control algorithm has been first co-simulated with processor in the loop (PIL) and then experimentally validated. The transient behaviour of developed prototype system for application and removal of balanced, unbalanced, nonlinear load is investigated.

Dheeraj Kumar Palwalia

2014-01-01T23:59:59.000Z

422

Multilevel-Dc-Bus Inverter For Providing Sinusoidal And Pwm Electrical Machine Voltages  

DOE Patents [OSTI]

A circuit for controlling an ac machine comprises a full bridge network of commutation switches which are connected to supply current for a corresponding voltage phase to the stator windings, a plurality of diodes, each in parallel connection to a respective one of the commutation switches, a plurality of dc source connections providing a multi-level dc bus for the full bridge network of commutation switches to produce sinusoidal voltages or PWM signals, and a controller connected for control of said dc source connections and said full bridge network of commutation switches to output substantially sinusoidal voltages to the stator windings. With the invention, the number of semiconductor switches is reduced to m+3 for a multi-level dc bus having m levels. A method of machine control is also disclosed.

Su, Gui-Jia [Knoxville, TN

2005-11-29T23:59:59.000Z

423

Data:21866443-09a8-4ccc-a91b-a1ac16afd688 | Open Energy Information  

Open Energy Info (EERE)

443-09a8-4ccc-a91b-a1ac16afd688 443-09a8-4ccc-a91b-a1ac16afd688 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Kosciusko County Rural E M C Effective date: 2011/02/01 End date if known: Rate name: Large Power - Time of Use - Schedule LP-TOU Sector: Industrial Description: AVAILABILITY Available to any member of Kosciusko Rural Electric Membership Corporation(KREMC) meeting qualifications for service under Schedule LP. This schedule is not available for standby service or for use in conjunction with alternative power supply resources. CHARACTER OF SERVICE Service rendered under this schedule shall be alternating current, 60 hertz, at 120/240 volts or such other voltage as might be mutually agreed upon.

424

Data:Fdf48ae2-53ac-413b-9e71-8d3f566442e1 | Open Energy Information  

Open Energy Info (EERE)

Fdf48ae2-53ac-413b-9e71-8d3f566442e1 Fdf48ae2-53ac-413b-9e71-8d3f566442e1 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Columbus Southern Power Co Effective date: 2012/03/09 End date if known: Rate name: General Service - Medium Load Factor-Secondary Voltage (Breakdown Service Minimum Demand Charge) Sector: Industrial Description: Customers with cogeneration and/or small power production facilities which qualify under Section 210 of the Public Utility Regulatory Policies Act of 1978 shall take service under Schedule COGEN/SPP, Schedule NEMS, or by special agreement with the Company. A time-of-day meter is required to take service under this provision. All other customers having sources of electrical

425

Near?Millimeter Wave Issues for a Space Power Grid  

Science Journals Connector (OSTI)

This paper reports continuing work on an evolutionary revenue?generating approach to Space Solar Power. The 220 GHz atmospheric transmission window is chosen leaving open the option of using millimeter wave or laser wavelengths. The progression from frequency to system business case is laid out seeking the performance figures needed for a self?sustaining system and to open up Space Solar Power in 15 to 17 years from first launch. An overall transmission efficiency in excess of 30 percent is required from DC to beamed power and back to DC or high?voltage AC to meet a delivered free?market price target of 30 cents per KWH or 20 percent if a price of 45 cents per KWH. Climate data show that rain obscuration is a non?issue for many of the renewable?power sites that comprise the market. The technology of direct solar conversion to DC and to beamed power would satisfy the needed efficiencies but requires advances in nano?scale fabrication with dielectrics.

Narayanan Komerath; Vigneshwar Venkat; Jason Fernandez

2009-01-01T23:59:59.000Z

426

Data:E656ac25-f9e7-4517-be86-db03becc2c3e | Open Energy Information  

Open Energy Info (EERE)

Data Data Edit with form History Facebook icon Twitter icon » Data:E656ac25-f9e7-4517-be86-db03becc2c3e No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Sand Mountain Electric Coop Effective date: 2013/05/01 End date if known: Rate name: Schedule GSA - General Power Service - Part 2 Sector: Commercial Description: Source or reference: Illinois State University Archive Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service

427

A theoretical study of the incandescent filament lamp performance under voltage flicker  

SciTech Connect (OSTI)

Incandescent filament lamp flicker, produced by voltage fluctuation, is a power quality problem that caused engineering concern since the onset of electrical illumination technology. The flicker phenomenon was analyzed and explained in early studies. Standards dealing with acceptable flicker levels are well known, nevertheless, today the discussion about flicker continues to be a top priority topic due to the fact that steady-state and transient voltage waveform distortion is a growing problem in low and medium voltage systems. In many situations voltage flicker is caused by subharmonics and interharmonics of voltage. Cycloconverters, welders and arc furnaces, eccentrically operating tools and integral cycle controlled power equipment are notorious for producing voltage flicker. The goal of this paper is to provide solid mathematical basis for the analytical modeling of incandescent filament lamp flicker when the voltage is nonsinusoidal. A mathematical model that enables the evaluation of the luminous flux modulation caused by noninteger harmonics (subharmonics and interharmonics) is presented. Three situations are detailed: square-wave voltage modulation, sinusoidal modulation and the case of noninteger harmonics with nearly contiguous frequencies.

Peretto, L. [Univ. of Bologna (Italy)] [Univ. of Bologna (Italy); Emanuel, A.E. [Worcester Polytechnic Inst., MA (United States)] [Worcester Polytechnic Inst., MA (United States)

1997-01-01T23:59:59.000Z

428

Capability constraints to mitigate voltage fluctuations from DFIG wind farms when delivering ancillary services to the network  

Science Journals Connector (OSTI)

Abstract Majority of the wind power resources are typically sited at remote locations in power networks and generated power is transmitted through rural transmission corridors to load centres. With increased penetration level of the wind generation there is an increased requirement to provide ancillary services from distributed wind power resources, hence they are operated under different control strategies to provide ancillary services to the network. The control strategies and capability characteristics will significant impact on voltage fluctuations in distribution networks. This paper presents a comparative analysis between different wind generator control strategies (i.e. power factor control strategy, voltage control strategy and reactive power dispatch strategy) on network voltage fluctuations during variable wind conditions while considering extended reactive power capability (i.e. with both generator and power electronic converter reactive power capabilities) for the doubly-fed induction generator (DFIG). Voltage fluctuations are analysed using real wind data measured at a DFIG based wind farm, and the wind farm model was verified against real measurements. Study has shown that voltage fluctuations are exacerbated when wind generator is at mode transition (i.e. from power optimisation mode to power limitation mode). A sensitivity analysis has shown that voltage fluctuations are exacerbated due to the limitations of the reactive power capability of the DFIG, and the operating point of the DFIG power curve irrespective of the control strategy implemented at the wind generator. Furthermore, a mitigation strategy was developed as an integrated control scheme to the main control scheme in order to reduce voltage fluctuations due to wind power variations. However, effectiveness of the mitigation strategy is greatly affected by the reactive power capability of the DFIG, in particular during high wind turbulences.

Lasantha Meegahapola; Sarath Perera

2014-01-01T23:59:59.000Z

429

Generating Worst-Case Stimuli for Accurate Power Grid Analysis  

Science Journals Connector (OSTI)

Power distribution systems provide the voltages and currents that devices in a circuit need to operate properly and silicon success requires its careful design and verification. However, problems like voltage dro...

Pedro Marques Morgado; Paulo F. Flores…

2009-01-01T23:59:59.000Z

430

Data:3d1634ea-5b99-465e-ac3b-6d9d34e9b8b8 | Open Energy Information  

Open Energy Info (EERE)

ea-5b99-465e-ac3b-6d9d34e9b8b8 ea-5b99-465e-ac3b-6d9d34e9b8b8 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Cornhusker Public Power Dist Effective date: 2012/01/01 End date if known: Rate name: Irrigation and Grain-Drying Service I-3 (13, 14)- Three Control Days - With Capacitor Sector: Residential Description: Source or reference: Illinois State University Binder #10 Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category:

431

Data:15fb8a46-8c86-4227-99f4-8f4ac7c61c7f | Open Energy Information  

Open Energy Info (EERE)

fb8a46-8c86-4227-99f4-8f4ac7c61c7f fb8a46-8c86-4227-99f4-8f4ac7c61c7f No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Lincoln Electric System Effective date: End date if known: Rate name: Large Light and Power Off-Peak Seasonal Daily Primary Sector: Description: Excess kVA Source or reference: http://www.les.com/your_business/rate_schedules_llp.aspx Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous

432

Soft Magnetic Materials in High-Frequency, High-Power Conversion Applications  

E-Print Network [OSTI]

Voltage DC (HVDC) technologies aim to improve the effi- ciency of power networks and benefit from high

McHenry, Michael E.

433

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

434

PQMII POWER QUALITY METER INSTRUCTION MANUAL 11 PQMII Power Quality Meter  

E-Print Network [OSTI]

#12;#12;#12;PQMII POWER QUALITY METER ­ INSTRUCTION MANUAL 1­1 PQMII Power Quality Meter Chapter 1 Multilin PQMII Power Quality Meter is an ideal choice for continuous monitoring of a single or three-phase system. It provides metering for current, voltage, real power, reactive power, apparent power, energy use

Meyers, Steven D.

435

Outdoor PV Module Degradation of Current-Voltage Parameters: Preprint  

SciTech Connect (OSTI)

Photovoltaic (PV) module degradation rate analysis quantifies the loss of PV power output over time and is useful for estimating the impact of degradation on the cost of energy. An understanding of the degradation of all current-voltage (I-V) parameters helps to determine the cause of the degradation and also gives useful information for the design of the system. This study reports on data collected from 12 distinct mono- and poly-crystalline modules deployed at the National Renewable Energy Laboratory (NREL) in Golden, Colorado. Most modules investigated showed < 0.5%/year decrease in maximum power due to short-circuit current decline.

Smith, R. M.; Jordan, D. C.; Kurtz, S. R.

2012-04-01T23:59:59.000Z

436

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

437

Application of evolutionary algorithms for the planning of urban distribution networks of medium voltage  

E-Print Network [OSTI]

Abstract—Currently, an important issue in power distribution is the need to optimize medium voltage (mv) networks serving urban areas. This paper shows how an evolutionary algorithm can be used as the basis for the type of efficient algorithm such optimization demands. The search for optimal network solution will be restricted to a graph defined from the urban map, so each graph branch represents a trench. The solution space (networks) is assumed with “loop feeder circuits”: networks with two electrical paths from the high voltage/medium voltage (hv/mv) substations to the customers. In the optimization process, the investment and loss load costs are considered taking into account the constraints of conductor capacities and voltage drop. The investment costs will take into account that some cables can be lying in the same trench. The process was applied for a Spanish city of 200 000 inhabitants. Index Terms—Evolutionary algorithm, medium voltage network planning, network design, urban distribution network. I.

unknown authors

2002-01-01T23:59:59.000Z

438

Dimmable AC LED Driver With Efficiency Improved Based on Switched LED Module  

Science Journals Connector (OSTI)

In this paper, one AC light-emitting diode (LED) driver with high power factor (PF) and low total harmonic distortion (THD) is adopted, which is added with the proposed...

Hwu, K I; Tu, W C; Fang, Y T

2014-01-01T23:59:59.000Z

439

E-Print Network 3.0 - ac electric arc Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Search Powered by Explorit Topic List Advanced Search Sample search results for: ac electric arc Page: << < 1 2 3 4 5 > >> 1 The response of the azimuthal component of the...

440

Alameda-Contra Costa Transit District (AC Transit) Fuel Cell Transit Buses: Preliminary Evaluation Results  

SciTech Connect (OSTI)

This report provides an evaluation of three prototype fuel cell-powered transit buses operating at AC Transit in Oakland, California, and six baseline diesel buses similar in design to the fuel cell buses.

Chandler, K.; Eudy, L.

2007-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "ac power voltage" 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

Alameda-Contra Costa Transit District (AC Transit) Fuel Cell Transit Buses: Preliminary Evaluation Results  

Broader source: Energy.gov [DOE]

This report provides an evaluation of three prototype fuel cell-powered transit buses operating at AC Transit in Oakland, California, and six baseline diesel buses similar in design to the fuel cell buses.

442

Interleaved power converter  

DOE Patents [OSTI]

A power converter architecture interleaves full bridge converters to alleviate thermal management problems in high current applications, and may, for example, double the output power capability while reducing parts count and costs. For example, one phase of a three phase inverter is shared between two transformers, which provide power to a rectifier such as a current doubler rectifier to provide two full bridge DC/DC converters with three rather than four high voltage inverter legs.

Zhu, Lizhi (Canton, MI)

2007-11-13T23:59:59.000Z

443

Optimizing performance per watt on GPUs in High Performance Computing: temperature, frequency and voltage effects  

E-Print Network [OSTI]

The magnitude of the real-time digital signal processing challenge attached to large radio astronomical antenna arrays motivates use of high performance computing (HPC) systems. The need for high power efficiency (performance per watt) at remote observatory sites parallels that in HPC broadly, where efficiency is an emerging critical metric. We investigate how the performance per watt of graphics processing units (GPUs) is affected by temperature, core clock frequency and voltage. Our results highlight how the underlying physical processes that govern transistor operation affect power efficiency. In particular, we show experimentally that GPU power consumption grows non-linearly with both temperature and supply voltage, as predicted by physical transistor models. We show lowering GPU supply voltage and increasing clock frequency while maintaining a low die temperature increases the power efficiency of an NVIDIA K20 GPU by up to 37-48% over default settings when running xGPU, a compute-bound code used in radio...

Price, D C; Barsdell, B R; Babich, R; Greenhill, L J

2014-01-01T23:59:59.000Z

444

Efficient Computation of Sensitivity Coefficients of Node Voltages and Line Currents in Unbalanced Electrical Networks  

E-Print Network [OSTI]

The problem of optimal control of power distribution systems is becoming increasingly compelling due to the progressive penetration of distributed energy resources in this specific layer of the electrical infrastructure. Distribution systems are, indeed, experiencing significant changes in terms of operation philosophies that are often based on optimal control strategies relying on the computation of linearized dependencies between controlled (e.g. voltages) and control variables (e.g. power injections). As the implementation of these strategies in real-time controllers imposes stringent time constraints, the derivation of analytical dependency between controlled and control variables becomes a non-trivial task to be solved. With reference to optimal voltage and power flow controls, this paper aims at providing an analytical derivation of node voltage and line current flows as a function of the nodal power injections. Compared to other approaches presented in the literature, the one proposed here is based on ...

Christakou, Konstantina; Paolone, Mario; Tomozei, Dan-Cristian

2012-01-01T23:59:59.000Z

445

Stability analysis of multi-phase AC arc discharge for in-flight glass melting  

Science Journals Connector (OSTI)

A stable multi-phase AC arc was generated to by transformers at a commercial electric system. The arc discharge behavior and the stability were investigated by the high-speed video camera observation synchronized with the voltage waveform analysis. The effect of the number of phase and the flaming gas addition into the arc region on the arc behavior and the arc stability were studied. Results showed that the re-ignition occurred between adjacent electrodes periodically. Two kinds of the stability analysis methods were introduced. The estimated fluctuation degree showed that an increase of the number of the phase leads to the stable multi-phase AC arc. The deviation of the arc voltage from the average arc voltage was estimated to evaluate the uniformity of the multi-phase AC arc. Although an addition of the oxygen flame into the arc region leads to lower uniformity, the modification of the electrode position can improve the uniformity of the multi-phase AC arc.

Manabu Tanaka; Yosuke Tsuruoka; Yaping Liu; Tsugio Matsuura; Takayuki Watanabe

2011-01-01T23:59:59.000Z

446

Sequential power-up circuit  

DOE Patents [OSTI]

A sequential power-up circuit for starting several electrical load elements in series to avoid excessive current surge, comprising a voltage ramp generator and a set of voltage comparators, each comparator having a different reference voltage and interfacing with a switch that is capable of turning on one of the load elements. As the voltage rises, it passes the reference voltages one at a time and causes the switch corresponding to that voltage to turn on its load element. The ramp is turned on and off by a single switch or by a logic-level electrical signal. The ramp rate for turning on the load element is relatively slow and the rate for turning the elements off is relatively fast. Optionally, the duration of each interval of time between the turning on of the load elements is programmable. 2 figs.

Kronberg, J.W.

1992-06-02T23:59:59.000Z

447

Manufacturing challenges of optical current and voltage sensors for utility applications  

SciTech Connect (OSTI)

Measurement of voltages and currents in power transmission and distribution systems are critical to the electric utility industry for both revenue metering and reliability. Nonconventional instrument transformers based on intensity modulation of optical signals have been reported in the literature for more than 20 years. Recently described devices using passive bulk optical sensor elements include the Electro-Optic Voltage Transducer (EOVT) and Magneto-Optic Current Transducer (MOCT). These technologies offer substantial advantages over conventional instrument transformers in accuracy, optical isolation bandwidth, environmental compatibility, weight and size. This paper describes design and manufacturing issues associated with the EOVT and the Optical Metering Unit (OMU) recently introduced by ABB with field installation results presented for prototype units in the 345 kV and 420 kV voltage classes. The OMU incorporates an EOVT and MOCT to monitor the voltage and current on power transmission lines using a single free-standing device.

Yakymyshyn, C.P. [Montana State Univ., Bozeman, MT (United States). Dept. of Electrical and Computer Engineering; Brubaker, M.A. [Los Alamos National Lab., NM (United States); Johnston, P.M. [Johnston (Paul M.), Raleigh, NC (United States); Reinbold, C. [ABB High Voltage Switchgear, Greensburg, PA (United States)

1997-12-01T23:59:59.000Z

448

Aircraft AC Generators: Hybrid System Modeling and Simulation  

E-Print Network [OSTI]

1 Aircraft AC Generators: Hybrid System Modeling and Simulation Ashraf Tantawy, Student Member--Integrated Drive Generators (IDGs) are the main source of electrical power for a number of critical systems is a difficult task. dq0 models have been developed for design and control of generators, but these models

Koutsoukos, Xenofon D.

449

The scaling of transport AC losses in Roebel cables with varying strand parameters  

Science Journals Connector (OSTI)

A Roebel cable is a good candidate for low-voltage windings in a high-temperature superconductor (HTS) transformer because of its high current-carrying capability and low AC loss. Transport AC loss measurements were carried out in 1.8 m long 15/5 (fifteen 5 mm wide strands) and 15/4 Roebel cables. The results were compared with those in many Roebel cables composed of 2 mm wide Roebel strands. Comparison of the AC losses hinted that the intrinsic difference in normalized transport AC losses is due to differences in the g/w (ratio of the horizontal gap between the Roebel strands over the Roebel strand width) values. The intrinsic difference was confirmed by measuring transport AC loss in a series of horizontally arranged parallel conductor pairs with various g values. A method to scale transport AC losses in Roebel cables with varying strand parameters was developed. The scaling method will be useful for a rough assessment of AC loss in one-layer solenoid winding coils, such as in a HTS transformer.

Zhenan Jiang; Mike Staines; Nicholas J Long; Rodney A Badcock; Chris Bumby; Evgeny Talantsev; Kent Hamilton; Robert G Buckley; Naoyuki Amemiya

2014-01-01T23:59:59.000Z

450

Power Electronics' Circuit Topology the Basic Switching Cells Fang Z. Peng Leon M. Tolbert, Faisal Khan  

E-Print Network [OSTI]

be obtained for the construction and decomposition of existing power electronic circuits. New power conversion, inverter, N- cell, P-cell. I. INTRODUCTION Power electronic circuits that range from dc-dc, ac-dc, dc- acPower Electronics' Circuit Topology ­ the Basic Switching Cells Fang Z. Peng Leon M. Tolbert

Tolbert, Leon M.

451

Development of an AC Module System: Final Technical Report  

SciTech Connect (OSTI)

The GreenRay Inc. program focused on simplifying solar electricity and making it affordable and accessible to the mainstream population. This was accomplished by integrating a solar module, micro-inverter, mounting and monitoring into a reliable, 'plug and play' AC system for residential rooftops, offering the following advantages: (1) Reduced Cost: Reduction in installation labor with fewer components, faster mounting, faster wiring. (2) Maximized Energy Production: Each AC Module operates at its maximum, reducing overall losses from shading, mismatch, or module downtime. (3) Increased Safety. Electrical and fire safety experts agree that AC Modules have significant benefits, with no energized wiring or live connections during installation, maintenance or emergency conditions. (4) Simplified PV for a Broader Group of Installers. Dramatic simplification of design and installation of a solar power system, enabling faster and more efficient delivery of the product into the market through well-established, mainstream channels. This makes solar more accessible to the public. (5) Broadened the Rooftop Market: AC Modules enable solar for many homes that have shading, split roofs, or obstructions. In addition, due to the smaller building block size of 200W vs. 1000W, homeowners with budget limitations can start small and add to their systems over time. Through this DOE program GreenRay developed the all-in-one AC Module system with an integrated PV Module and microinverter, custom residential mounting and performance monitoring. Development efforts took the product from its initial concept, through prototypes, to a commercial product sold and deployed in the residential market. This pilot deployment has demonstrated the technical effectiveness of the AC Module system in meeting the needs and solving the problems of the residential market. While more expensive than the traditional central inverter systems at the pilot scale, the economics of AC Modules become more and more favorable as the product matures and is made in high volumes. GreenRay's early customers have been highly enthusiastic about the AC Module system benefits.

Suparna Kadam; Miles Russell

2012-06-15T23:59:59.000Z

452

Definition: Operating Voltage | Open Energy Information  

Open Energy Info (EERE)

Voltage Voltage Jump to: navigation, search Dictionary.png Operating Voltage The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related; also, the effective (root-mean-square) potential difference between any two conductors or between a conductor and the ground. The actual voltage of the circuit may vary somewhat above or below this value.[1] Related Terms system References ↑ Glossary of Terms Used in Reliability Standards An LikeLike UnlikeLike You like this.Sign Up to see what your friends like. inline Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Operating_Voltage&oldid=480559" Categories: Definitions ISGAN Definitions What links here Related changes

453

High voltage load resistor array  

DOE Patents [OSTI]

A high voltage resistor comprising an array of a plurality of parallel electrically connected resistor elements each containing a resistive solution, attached at each end thereof to an end plate, and about the circumference of each of the end plates, a corona reduction ring. Each of the resistor elements comprises an insulating tube having an electrode inserted into each end thereof and held in position by one or more hose clamps about the outer periphery of the insulating tube. According to a preferred embodiment, the electrode is fabricated from stainless steel and has a mushroom shape at one end, that inserted into the tube, and a flat end for engagement with the end plates that provides connection of the resistor array and with a load.

Lehmann, Monty Ray (Smithfield, VA)

2005-01-18T23:59:59.000Z

454

Novel passive lossless turn-on snubber for voltage source inverters  

SciTech Connect (OSTI)

A novel passive lossless turn-on snubber with a soft clamped turn-off snubber circuit for voltage source inverters is proposed. The energy trapped in the snubber is recovered into the dc supply and load without any active devices, associated control circuitry, or resistors. The overshoot voltage on the switches is clamped, and the peak switch current is low, making this snubber suitable for use in high-power insulated gate bipolar transistor (IGBT) inverters.

He, X.; Qian, Z.M. [Zhejiang Univ., Hangzhou (China). Dept. of Electrical Engineering; Finney, S.J.; Williams, B.W. [Heriot-Watt Univ., Edinburgh (United Kingdom). Dept. of Computing and Electrical Engineering

1997-01-01T23:59:59.000Z

455

Non-transposed, three phase transmission lines: a study of their effect on load voltages.  

E-Print Network [OSTI]

TRANSMISSION LINES A S'PJDY OF THEIR EFFECT ON LOAD VOLTAGES A Thesis By Robert Dean Chenoweth August 1951 NON-TRANSPOSED~ THREE PHASE TRANSMISSION LINES A STUDY OF THEIR EFFECT ON LOAD VOLTAGES A Thesis Submitted to the Faculty of the Agricultural... all large blocks of alternating current power are transmitted from the generating station to the load by means of three phase transmission lines. With present day equipment this method is economical and when ~ properly designed gives very...

Chenoweth, Robert Dean

2012-06-07T23:59:59.000Z

456

Advanced Gate Drive for the SNS High Voltage Converter Modulator  

SciTech Connect (OSTI)

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

457

Thermally-induced voltage alteration for integrated circuit analysis  

DOE Patents [OSTI]

A thermally-induced voltage alteration (TIVA) apparatus and method are disclosed for analyzing an integrated circuit (IC) either from a device side of the IC or through the IC substrate to locate any open-circuit or short-circuit defects therein. The TIVA apparatus uses constant-current biasing of the IC while scanning a focused laser beam over electrical conductors (i.e. a patterned metallization) in the IC to produce localized heating of the conductors. This localized heating produces a thermoelectric potential due to the Seebeck effect in any conductors with open-circuit defects and a resistance change in any conductors with short-circuit defects, both of which alter the power demand by the IC and thereby change the voltage of a source or power supply providing the constant-current biasing. By measuring the change in the supply voltage and the position of the focused and scanned laser beam over time, any open-circuit or short-circuit defects in the IC can be located and imaged. The TIVA apparatus can be formed in part from a scanning optical microscope, and has applications for qualification testing or failure analysis of ICs.

Cole, Jr., Edward I. (Albuquerque, NM)

2000-01-01T23:59:59.000Z

458

High-Voltage Test Laboratories  

Science Journals Connector (OSTI)

The power for a complete HV laboratory is usually supplied from a medium-...9.20...). One or several three-phase distribution transformers in a nearby substation should be used for that purpose. Their...Sect. 9.2...

Wolfgang Hauschild; Eberhard Lemke

2014-01-01T23:59:59.000Z

459

Group 3: Humidity, Temperature, and Voltage (Presentation)  

SciTech Connect (OSTI)

Group 3 is chartered to develop accelerated stress tests that can be used as comparative predictors of module lifetime versus stresses associated with humidity, temperature and voltage.

Wohlgemuth, J.

2013-05-01T23:59:59.000Z

460

High Voltage Electrolyte for Lithium Batteries  

Broader source: Energy.gov (indexed) [DOE]

battery using high voltage high energy cathode materials to enable large-scale, cost competitive production of the next generation of electric-drive vehicles. To...

Note: This page contains sample records for the topic "ac power voltage" 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

Dept. of CSE 1 Low Power Design andLow Power Design and  

E-Print Network [OSTI]

voltage with multicycling (MVMC) Why power fluctuation minimization ? · to reduce power supply noise (L di/dt) · to reduce cross talk (M di/dt) · to increase battery efficiency (electrochemical efficiency) · to increase

Mohanty, Saraju P.

462

THREE DIMENSIONAL VISUALIZATIONS FOR POWER SYSTEM CONTINGENCY ANALYSIS VOLTAGE DATA  

E-Print Network [OSTI]

arrangement. A typical CA models single element outage (one-transmission line or one-generator outage), multiple-element outage (two-transmission line outage, one transmission line and one generator outage, etc data. We visualize vulnerability levels of buses and severity information of outages separately

463

Distribution capacitor automation that controls voltage and saves energy  

SciTech Connect (OSTI)

The Electric Distribution Business Line of Southern California Edison Company (SCE) has begun a program to improve the distribution system operations and electrical efficiency. The program, called the Distribution System Efficiency Enhancement Program (DSEEP), consists of five principal projects: Automated Switching, Circuit Lock-Out Alarming, Substation Monitoring and Control, Outage Management, and Distribution Capacitor Automation Project (DCAP). DCAP is the largest and most sophisticated of the projects being implemented. The project takes advantage of fine-tuning customer voltages for conservation voltage regulation (CVR) benefits as well as minimizes line losses by reducing unnecessary reactive power flow. DCAP can also help to increase transmission line and substation capacity by improving system power factor. The DCAP system takes advantage of the distributed processing capability of meters, capacitor controllers, radios, and substation processors. DCAP uses two-way packet radios and new electronic meters that read real-time customer voltages as well as energy consumption. The radios transmit customer meter voltage information and capacitor status to substation processors, where a control algorithm runs to determine which capacitors should be turned on or off. The objective of DCAP is to reduce over-all net energy transfer from the substation to the customer and meet system VAR requirements. SCE has tested the system on 66 circuit capacitors (including 3 substation capacitors) on 18 circuits served from two substations. The positive results of the DCAP demonstrations has led to an aggressive roll-out plan for system-wide implementation of automating over 7600 switched capacitors by year-end 1995.

Williams, B.R.

1994-12-31T23:59:59.000Z

464

Data:Ec554b62-3b1a-4913-a7a0-16e580478ac6 | Open Energy Information  

Open Energy Info (EERE)

54b62-3b1a-4913-a7a0-16e580478ac6 54b62-3b1a-4913-a7a0-16e580478ac6 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Omaha Public Power District Effective date: 2013/01/01 End date if known: Rate name: CONSUMER OWNED STREET LIGHTING Metal Halide 250 Sector: Lighting Description: CONSUMER OWNED SYSTEM OPERATED BY DISTRICT Source or reference: http://ww3.oppd.com/rates/OppdRateManual.pdf#nameddest=110 Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service

465

Data:22f774e8-c734-4ac6-b86d-c99d00427811 | Open Energy Information  

Open Energy Info (EERE)

-c734-4ac6-b86d-c99d00427811 -c734-4ac6-b86d-c99d00427811 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Connecticut Light & Power Co Effective date: 2013/07/01 End date if known: Rate name: Rate 35 - Intermediate General Electric Service (Bundled Service Facilities Ownership) Sector: Commercial Description: AVAILABLE for the electrical requirements where the customer's maximum demand is less than 200 kW and delivered at one point and at one standard voltage through one installation of transformers supplied by the Company. Service will be metered at one point by one installation of meters. The meter location will be determined by the Company. Where the Company deems it impractical to deliver electricity through one service, or where more than one meter has been installed for billing under a withdrawn rate, then the measurement of electricity may be by two or more meters.

466

Data:A2ff941d-4678-4908-992b-bbf59574ac4b | Open Energy Information  

Open Energy Info (EERE)

ff941d-4678-4908-992b-bbf59574ac4b ff941d-4678-4908-992b-bbf59574ac4b No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Idaho Power Co Effective date: 2012/07/01 End date if known: Rate name: Schedule 45 - Standby Service (Transmission) Sector: Industrial Description: Standby Service under this schedule is available at points on the Company's interconnected system within the State of Idaho where existing facilities of adequate capacity and desired phase and voltage are available. If additional distribution facilities are required to supply the desired service, those facilities provided for under Rule H will be provided under the terms and conditions of that rule. To the extent that additional facilities not provided for under Rule H, including transmission and/or substation facilities, are required to provide the requested service, special arrangements will be made in a separate agreement between the Customer and the Company.

467

Data:166ef4ac-a95b-4b0a-a9cc-a84d89909599 | Open Energy Information  

Open Energy Info (EERE)

ef4ac-a95b-4b0a-a9cc-a84d89909599 ef4ac-a95b-4b0a-a9cc-a84d89909599 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Entergy Louisiana Inc Effective date: 2006/01/31 End date if known: Rate name: Business Schedule GS - 1W (Rider UMS-5) (transmission < 230kV voltage) Sector: Commercial Description: This rider is applicable to electric service required by Customers who contract for unmetered electric service under Schedule GS to billboards, unmetered telephone services, telephone booths, railroad signals, cathodic units, traffic cameras or for community antenna systems' pole mounted power supplies, amplifiers, and related incidental equipment, hereinafter referred to as equipment, or other such equipment where metering is not feasible or economical.

468

Data:2a74959b-ab90-4e4a-89b0-ac12c5861f01 | Open Energy Information  

Open Energy Info (EERE)

9b-ab90-4e4a-89b0-ac12c5861f01 9b-ab90-4e4a-89b0-ac12c5861f01 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: City of Story City, Iowa (Utility Company) Effective date: 2004/11/01 End date if known: Rate name: Residential Rural Sector: Residential Description: Monthly Service charge is subject to fuel cost and purchase power adjustment Source or reference: Rate Binder# 1B (Illinois State University) Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service

469

Data:B4f65671-6f28-4612-8e20-f6935ac11b6f | Open Energy Information  

Open Energy Info (EERE)

f65671-6f28-4612-8e20-f6935ac11b6f f65671-6f28-4612-8e20-f6935ac11b6f No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: El Paso Electric Co Effective date: 2010/07/01 End date if known: Rate name: Electric furnace rate - transmission voltage Sector: Industrial Description: This rate is available to customers for lighting and power service who have electric furnaces for metal melting where an individual furnace has a name plate rating of 5,000 kilowatts (kW) or more. This rate is not available to any new or existing customer who takes initial service after May 1. 1980. Source or reference: http://www.epelectric.com/files/html/Rates/TX_Tariff_Schedules/TX_Sch_No._30_Electric_Furnace.pdf

470

Data:233b3ac5-37b1-44ef-8d95-2f9bdbab5bc3 | Open Energy Information  

Open Energy Info (EERE)

ac5-37b1-44ef-8d95-2f9bdbab5bc3 ac5-37b1-44ef-8d95-2f9bdbab5bc3 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Poudre Valley R E A, Inc Effective date: 2013/01/01 End date if known: Rate name: LPTOU - Commercial, Large Time-of-Use Sector: Commercial Description: Available to all large power consumers for all types of usage over 37.5 kW and less than 5000 kW, which is not primary metered, subject to the established rules and regulations, tariffs, bylaws and Articles, of Incorporation of the Association. Consumers requesting this rate shall consult with a qualified representative to discuss applicability of this rate. Consumers may choose to switch to the Schedule B rate at the beginning of the next following regular billing period. Consumers may not switch back to this time-of-use rate for the next 12 months. Service: Single or three-phase, 60 hertz, at the Association's standard voltages. Riders are applied in accordance with rate Schedule R.

471

Data:0824b651-96aa-4a18-b44a-c4ecaceeacc1 | Open Energy Information  

Open Energy Info (EERE)

b651-96aa-4a18-b44a-c4ecaceeacc1 b651-96aa-4a18-b44a-c4ecaceeacc1 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Pearl River Valley El Pwr Assn Effective date: 2001/07/01 End date if known: Rate name: 23 LP-PM-AE-2 Large Power Primary Metering All Electric Sector: Description: Available to non-residential Consumers requiring a transformer capacity of 75 kVA or more, but less than 1,000 kVA, subject to Association's established rules and regulations. This rate applies to electrci service measured by one meter used exclusively by one Consumer in a single establishment on one premise utilizing a single delivery point, and not resold or shared with others. Single phase and or three phase, 60 cycles, at available secondary voltages. Motors having a rated capacity of 10 HP or above must be three phase.

472

Data:F532263c-df1d-44a9-aa8a-c997f3f8ebf4 | Open Energy Information  

Open Energy Info (EERE)

3c-df1d-44a9-aa8a-c997f3f8ebf4 3c-df1d-44a9-aa8a-c997f3f8ebf4 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Raton Public Service Company Effective date: End date if known: Rate name: Commercial- Three Phase Sector: Commercial Description: To all three phase commercial and all industrial customers in the RPS service area for lighting, heating, and power purposes. Source or reference: Rates Binder A Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service

473

Data:E7101117-ac86-4860-b08b-f043c5e88676 | Open Energy Information  

Open Energy Info (EERE)

17-ac86-4860-b08b-f043c5e88676 17-ac86-4860-b08b-f043c5e88676 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Pearl River Valley El Pwr Assn Effective date: 2001/07/01 End date if known: Rate name: 50 Mall-3 Mall Sector: Commercial Description: Available to shopping mall where electrical service is provided to mall tenants and or common areas within mall complex by one consumer utilizing a single delivery point, measured by one meter, and requiring 500 kVA or more of transformer capacity. Three phase 60 cycles, at Association's standard or an approved voltage by Association. Demand Charge: $7.25 per KVA Energy Charge: First 330 KWH per KVA of metered demand @ $0.028 per KWH. Next 140 KWH per KVA @ $0.024 per KWH. Over 470 KWH per KVA @ $0.021 per KWH. Power Cost Adjustment: $0.0001

474

Data:1634d96a-b098-4ac8-ab25-b2db936dda3c | Open Energy Information  

Open Energy Info (EERE)

34d96a-b098-4ac8-ab25-b2db936dda3c 34d96a-b098-4ac8-ab25-b2db936dda3c No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Southwestern Electric Power Co (Louisiana) Effective date: 2013/03/01 End date if known: Rate name: Municipal Street and Parkway Lighting - Closed offering - 100 Watt MV Sector: Lighting Description: Source or reference: http://www.swepco.com/global/utilities/lib/docs/ratesandtariffs/Louisiana/LouisianaA_06_06_2013.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage

475

Data:A36c4073-55fc-46de-ae37-38ac1b8674b6 | Open Energy Information  

Open Energy Info (EERE)

c4073-55fc-46de-ae37-38ac1b8674b6 c4073-55fc-46de-ae37-38ac1b8674b6 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Central Maine Power Co Effective date: 2012/07/01 End date if known: Rate name: A-LM Load Management Service Fixed Price Two-Year Short Term Sector: Description: AVAILABILITY This rate is available only to residential customers and to non-residential customers with monthly demands below 20 kW who have thermal energy storage devices and/or thermal storage heating systems integrated with resistance electric heating units (Eligible Devices). Devices that do not store thermal energy and thus would be adversely affected by periodic interruption will not be served under this rate. Service will be available under this rate for the time period between 8 p.m. on a given day and 7 a.m. on the following day. CHARACTER OF SERVICE End use service will be single phase, alternating current, 60 hertz, at one standard secondary distribution voltage as described in the Company's Handbook of Requirements for Electric Service and Meter Installations and through one point of delivery. SHORT-TERM SERVICE CHARGE

476

Data:B38ccddf-a536-40bc-ac35-0cd2af6decb3 | Open Energy Information  

Open Energy Info (EERE)

ccddf-a536-40bc-ac35-0cd2af6decb3 ccddf-a536-40bc-ac35-0cd2af6decb3 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Central Maine Power Co Effective date: 2012/07/01 End date if known: Rate name: A-LM Load Management Service Fixed Price Two-Year Sector: Description: AVAILABILITY This rate is available only to residential customers and to non-residential customers with monthly demands below 20 kW who have thermal energy storage devices and/or thermal storage heating systems integrated with resistance electric heating units (Eligible Devices). Devices that do not store thermal energy and thus would be adversely affected by periodic interruption will not be served under this rate. Service will be available under this rate for the time period between 8 p.m. on a given day and 7 a.m. on the following day. CHARACTER OF SERVICE End use service will be single phase, alternating current, 60 hertz, at one standard secondary distribution voltage as described in the Company's Handbook of Requirements for Electric Service and Meter Installations and through one point of delivery.

477

Data:F63123dd-1ac1-41a7-83c0-13fdfd2dc3f0 | Open Energy Information  

Open Energy Info (EERE)

123dd-1ac1-41a7-83c0-13fdfd2dc3f0 123dd-1ac1-41a7-83c0-13fdfd2dc3f0 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Omaha Public Power District Effective date: 2013/01/01 End date if known: Rate name: CONSUMER OWNED STREET LIGHTING Metal Halide 100 Sector: Lighting Description: CONSUMER OWNED SYSTEM OPERATED BY DISTRICT Source or reference: http://ww3.oppd.com/rates/OppdRateManual.pdf#nameddest=110 Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service

478

Data:36ac00e2-045d-4527-8247-d8b14308a095 | Open Energy Information  

Open Energy Info (EERE)

ac00e2-045d-4527-8247-d8b14308a095 ac00e2-045d-4527-8247-d8b14308a095 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Poudre Valley R E A, Inc Effective date: 2013/01/01 End date if known: Rate name: LP - Commercial, Large Sector: Commercial Description: Available to all large power consumers for all types of usage over 37.5 kW and less than 5000 kW, which is not primary metered, subject to the established rules and regulations, tariffs, bylaws and Articles, of Incorporation of the Association. Service: Single or three-phase, 60 hertz, at the Association's standard voltages. The minimum monthly charge shall be the highest of the following: 1. The minimum monthly charge specified in the Contract; 2. A charge of $1.50 per KVA of required transforemer capacity for three-phase service and $1.00 per KVA for single-phase service; 3. Current effective Facilities Charge. Riders are applied in accordance with rate Schedule R.

479

Data:Eabaed13-77fe-41c4-89ac-60a1c1f40cb4 | Open Energy Information  

Open Energy Info (EERE)

Eabaed13-77fe-41c4-89ac-60a1c1f40cb4 Eabaed13-77fe-41c4-89ac-60a1c1f40cb4 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: KEM Electric Coop Inc Effective date: End date if known: Rate name: General Service - Single Phase/Lg Power Sector: Commercial Description: Available to all members who do not meet the classifications or requirements of Farm/Residential, Seasonal, or other classifications. Service capacity will be greater than 50 kVa. Service shall be to a single-phase service at a single point of service. Type of Service Single Phase, 60 cycle, at secondary voltages. The Cooperative will provide meter, meter socket, and C.T. equipment necessary to measure electric usage.

480

Data:A7a47cbe-aff2-42c9-8b71-ec11ac15e102 | Open Energy Information  

Open Energy Info (EERE)

cbe-aff2-42c9-8b71-ec11ac15e102 cbe-aff2-42c9-8b71-ec11ac15e102 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Delmarva Power (Maryland) Effective date: 2012/06/01 End date if known: Rate name: GENERAL SERVICE - PRIMARY "GS-P" Sector: Description: the rate is unclear, there is type 1 and type 2 customer. they don't add up Source or reference: http://www.delmarva.com/_res/documents/DPLMdMasterTariff.pdf Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V):

Note: This page contains sample records for the topic "ac power voltage" from the National Library of EnergyBeta (NLEBeta).
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481

Data:Ea266ab1-d223-4ac0-9d07-2230acd11bdc | Open Energy Information  

Open Energy Info (EERE)

ab1-d223-4ac0-9d07-2230acd11bdc ab1-d223-4ac0-9d07-2230acd11bdc No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Kerrville Public Utility Board Effective date: 2000/01/01 End date if known: Rate name: Commercial-for Energy less or equal to 2500 kWh Sector: Commercial Description: Applicable throughout the service area to all electric service required for lighting, power and any other purpose, other than residential service as defined in Rate Schedule - RS, and where the maximum demand in any month is less than 400 kW. Not applicable to standby, shared, or resale service. Service under this rate schedule shall be alternating current, 60 Hertz, single or three phase,at the customer's option of standard available secondary voltages.

482

Design and Realization of Autonomous Power CMOS Single Phase Inverter and Rectifier for Low Power Conditioning Applications  

E-Print Network [OSTI]

Design and Realization of Autonomous Power CMOS Single Phase Inverter and Rectifier for Low Power operate as an inverter or as a rectifier in a wide range of power flows and input voltages. Three of the inverter reaches up to 92% as a function of input voltage with these conditions. The second experimental

Paris-Sud XI, Université de

483

Data:Da10b869-2522-4b0f-b7b6-3127ac40ac6b | Open Energy Information  

Open Energy Info (EERE)

Da10b869-2522-4b0f-b7b6-3127ac40ac6b Da10b869-2522-4b0f-b7b6-3127ac40ac6b No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1. Basic Information 2. Demand 3. Energy << Previous 1 2 3 Next >> Basic Information Utility name: Southwestern Electric Coop Inc (New Mexico) Effective date: 2007/07/01 End date if known: Rate name: Commercial Lighting Service >500 HP Sector: Lighting Description: Source or reference: http://www.swec-coop.org/rates-602-IRR.cfm Source Parent: Comments Applicability Demand (kW) Minimum (kW): Maximum (kW): History (months): Energy (kWh) Minimum (kWh): Maximum (kWh): History (months): Service Voltage Minimum (V): Maximum (V): Character of Service Voltage Category: Phase Wiring: << Previous

484

Abstract--The optimal power flow (OPF) problem is a critical problem for power generation and is generally non-convex. This  

E-Print Network [OSTI]

voltage lines with voltage magnitudes below 100 kV. Traditionally OPF problem mainly focus on transmission generators to areas in need, the networks' voltages are typically above 100 kV. Distribution networks flow on the line P: vector of active power generations Q: vector of reactive power generations L: loss

Lavaei, Javad

485

DESIGN AND IMPLEMENTATION OF A FUZZY LOGIC-BASED VOLTAGE CONTROLLER FOR VOLTAGE REGULATION  

E-Print Network [OSTI]

1 DESIGN AND IMPLEMENTATION OF A FUZZY LOGIC-BASED VOLTAGE CONTROLLER FOR VOLTAGE REGULATION In this paper the design and implementation of a fuzzy logic-based controller is described for regulating the output voltage of a synchronous generator. An automated fuzzy logic-based control strategy is presented

LaMeres, Brock J.

486

Dynamic Power Management with Power Network-on-Chip Inna Vaisband and Eby G. Friedman  

E-Print Network [OSTI]

Dynamic Power Management with Power Network-on-Chip Inna Vaisband and Eby G. Friedman Department dynamically controlled power to support power efficient and portable systems. Effi- ciently providing multiple point-of-load on-chip voltages requires fundamental changes to the power delivery and management process

Friedman, Eby G.

487

Power Conditioning and Control Applications for Energy Conservation  

E-Print Network [OSTI]

Electrical power conditioning and control (PCC) systems are finding cost effective applications in AC motor drives, lamp ballasts and power supplies. Substantial system efficiency improvements are being realized when the appropriate PCC system...

Brushwood, J. S.

1982-01-01T23:59:59.000Z

488

Auxiliary power controls on the Nelson River HVDC scheme  

SciTech Connect (OSTI)

This paper describes the auxiliary power controls on the Nelson River HVDC scheme. It shows how the fast control feature of the HVDC link can be utilized to enhance the operation of an integrated ac/dc power system.

Chand, J. (Manitoba Hydro, Winnipeg, Manitoba (CA))

1992-02-01T23:59:59.000Z

489

Voltage regulation in linear induction accelerators  

DOE Patents [OSTI]

Improvement in voltage regulation in a Linear Induction Accelerator wherein a varistor, such as a metal oxide varistor, is placed in parallel with the beam accelerating cavity and the magnetic core. The non-linear properties of the varistor result in a more stable voltage across the beam accelerating cavity than with a conventional compensating resistance.

Parsons, William M. (Santa Fe, NM)

1992-01-01T23:59:59.000Z

490

Voltage regulation in linear induction accelerators  

DOE Patents [OSTI]

Improvement in voltage regulation in a linear induction accelerator wherein a varistor, such as a metal oxide varistor, is placed in parallel with the beam accelerating cavity and the magnetic core is disclosed. The non-linear properties of the varistor result in a more stable voltage across the beam accelerating cavity than with a conventional compensating resistance. 4 figs.

Parsons, W.M.

1992-12-29T23:59:59.000Z

491

Limitations of High-Voltage Insulation  

Science Journals Connector (OSTI)

... materials such as impregnated paper. The important electrical properties of the materials used for the insulation of high-voltage circuits are conductivity and electric strength. The conductivity measures the ability ... a million times between themselves, but they are all classified as available for high-voltage insulation.

1938-01-08T23:59:59.000Z

492

Sacramento Area Voltage Support Driaft Supplement Environmental Impact Statement and Environmental Impact Report  

Broader source: Energy.gov (indexed) [DOE]

Sacramento Area Voltage Support Draft SEIS/EIR * Western Area Power Administration * Sierra Nevada Region Sacramento Area Voltage Support Draft SEIS/EIR * Western Area Power Administration * Sierra Nevada Region A-1 APPEN DIX A Alternatives Development A.1 INTRODUCTION Appendix A summarizes the process used to identify and screen project alternatives for the joint, draft Supplemental Environmental Impact Statement and Environmental Impact Report (Sacramento Area Voltage Support (SVS) Draft SEIS and EIR). Public involvement was used to develop and refine alternatives. Engineering considerations were the primary factor in eliminating several alternatives. A.2 ALTERNATIVES SELECTED FOR DETAILED ANALYSIS Western Area Power Administration (Western), Sacramento Municipal Utility District (SMUD), and the City of Roseville (Roseville) identified three transmission line segments between Western's

493

On-chip Power Grid Verification with Reduced Order Modeling.  

E-Print Network [OSTI]

??To ensure the robustness of an integrated circuit design, its power distribution network (PDN) must be validated beforehand against any voltage drop on VDD nets.… (more)

Goyal, Ankit

2010-01-01T23:59:59.000Z

494

How a Geothermal Power Plant Works (Simple) - Text Version |...  

Energy Savers [EERE]

Lines Deliver Electricity Electrical current from the generator is sent to a step-up transformer outside the power plant. Voltage is increased in the transformer and electrical...

495

High Voltage Safety Act | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

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

496

New leading/trailing edge modulation strategies for two-stage AC/DC PFC adapters to reduce DC-link capacitor ripple current  

E-Print Network [OSTI]

AC/DC adapters mostly employ two-stage topology: Power Factor Correction (PFC) pre-regulation stage followed by an isolated DC/DC converter stage. Low power AC/DC adapters require a small size to be competitive. Among their components, the bulk DC...

Sun, Jing

2007-09-17T23:59:59.000Z

497

Data:0a6670af-b5e1-4c9b-ada1-5c6e425ac375 | Open Energy Information  

Open Energy Info (EERE)

0af-b5e1-4c9b-ada1-5c6e425ac375 0af-b5e1-4c9b-ada1-5c6e425ac375 No revision has been approved for this page. It is currently under review by our subject matter experts. Jump to: navigation, search Loading... 1.