Powered by Deep Web Technologies
Note: This page contains sample records for the topic "automatic generation control" 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

Definition: Automatic Generation Control | Open Energy Information  

Open Energy Info (EERE)

Automatic Generation Control Automatic Generation Control Jump to: navigation, search Dictionary.png Automatic Generation Control Equipment that automatically adjusts generation in a Balancing Authority Area from a central location to maintain the Balancing Authority's interchange schedule plus Frequency Bias. AGC may also accommodate automatic inadvertent payback and time error correction.[1] View on Wikipedia Wikipedia Definition Related Terms system, power, electricity generation, load, frequency bias, balancing authority, balancing authority area, smart grid References ↑ Glossary of Terms Used in Reliability Standards An inline LikeLike UnlikeLike You like this.Sign Up to see what your friends like. Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Automatic_Generation_Control&oldid=502513"

2

Design of novel hybrid controller for automatic generation control of hydrothermal system under open market scenario  

Science Conference Proceedings (OSTI)

This paper presents the analysis of Automatic generation control (AGC) of a two-area hydrothermal system under open market scenario by considering a novel hybrid controller which combines the principles of variable structure controller (VSC) and conventional ... Keywords: AGC, VSC, deregulated system, hybrid controller, hydrothermal system, open market system

C. Srinivasa Rao; S. Siva Nagaraju; P. Sangameswara Raju

2009-12-01T23:59:59.000Z

3

Evaluation of the Effectiveness of Automatic Generation Control (AGC) Alterations for Improved Control with Significant Wind Generation  

Science Conference Proceedings (OSTI)

Wind power represents a significant fraction of the total generation capacity of the Hawaii Electric Light Company (HELCO) system, and HELCO system operators have observed instances where the short-term variability of the existing wind generation has resulted in increased frequency fluctuations. The existing automatic generation control (AGC) system has sometimes exacerbated these frequency fluctuations. To deal with this problem, HELCO contracted with AREVA to implement functional changes to the existin...

2009-05-26T23:59:59.000Z

4

Improving Automatic Interface Generation with Smart Templates  

E-Print Network (OSTI)

Improving Automatic Interface Generation with Smart Templates Jeffrey Nichols, Brad A. Myers 1. Arrangements of media playback controls gener- ated automatically from the media-control Smart differently. Smart Templates is a technique that uses parameterized templates in the appliance model

Myers, Brad A.

5

Automatic temperature control  

Science Conference Proceedings (OSTI)

An automatic temperature control system is described for maintaining a preset temperature in an enclosed space in a building, comprising: heating and cooling means for conditioning the air in the enclosed space to maintain the preset temperature; exterior thermostat means outside the building for sensing ambient exterior temperature levels; interior thermostat means in the enclosed space, preset to the preset temperature to be maintained and connected with the heating and cooling means to energize the means for heating or cooling, as appropriate, when the preset temperature is reached; means defining a heat sink containing a volume of air heated by solar radiation, the volume of the heat sink being such that the temperature level therein is not affected by minor or temporary ambient temperature fluctuations; and heat sink thermostat means in the heat sink sensing the temperature in the heat sink, the heat sink thermostat means being connected in tandem with the exterior thermostat means and operative with the exterior thermostat means to switch the interior thermostat means to either a first readiness state for heating or a second readiness state for cooling, depending upon which mode is indicated by both the exterior and heat sink thermostat means, whereby the system automatically switches between heating and cooling, as required, in response to a comparison of exterior and heat sink temperatures.

Sheridan, J.P.

1986-07-22T23:59:59.000Z

6

Automatic lighting controls demonstration  

SciTech Connect

The purpose of this work was to demonstrate, in a real building situation, the energy and peak demand reduction capabilities of an electronically ballasted lighting control system that can utilize all types of control strategies to efficiently manage lighting. The project has demonstrated that a state-of-the-art electronically ballasted dimmable lighting system can reduce energy and lighting demand by as least 50% using various combinations of control strategies. By reducing light levels over circulation areas (tuning) and reducing after hours light levels to accommodate the less stringent lighting demands of the cleaning crew (scheduling), lighting energy consumption on weekdays was reduced an average of 54% relative to the initial condition. 10 refs., 14 figs., 3 tabs.

Rubinstein, F.; Verderber, R.

1990-03-01T23:59:59.000Z

7

AUTOMATIC LIGHT CONTROL  

DOE Patents (OSTI)

A control system for a projection kinescope used in a facsimile scanning system and, in particular, meams for maintaining substantially constant the light emanating from the flying spot on the face of the kinescope are described. In general, the invention provides a feeler member disposed in such a position with respect to a projecting lens as to intercept a portion of the light striking the lens. Suitable circuitry in conjunction with a photomultiplier tube provides a signal proportional to the light intensity of the flying spot. The grid bias on the kinescope is controlled by this signal to maintain the intensity of the spot substantially constant.

Artzt, M.

1957-08-27T23:59:59.000Z

8

Automatic tool path generation for finish machining  

SciTech Connect

A system for automatic tool path generation was developed at Sandia National Laboratories for finish machining operations. The system consists of a commercially available 5-axis milling machine controlled by Sandia developed software. This system was used to remove overspray on cast turbine blades. A laser-based, structured-light sensor, mounted on a tool holder, is used to collect 3D data points around the surface of the turbine blade. Using the digitized model of the blade, a tool path is generated which will drive a 0.375 inch diameter CBN grinding pin around the tip of the blade. A fuzzified digital filter was developed to properly eliminate false sensor readings caused by burrs, holes and overspray. The digital filter was found to successfully generate the correct tool path for a blade with intentionally scanned holes and defects. The fuzzified filter improved the computation efficiency by a factor of 25. For application to general parts, an adaptive scanning algorithm was developed and presented with simulation results. A right pyramid and an ellipsoid were scanned successfully with the adaptive algorithm.

Kwok, Kwan S.; Loucks, C.S.; Driessen, B.J.

1997-03-01T23:59:59.000Z

9

Technology for automatic generation of application programs: a pragmatic view  

Science Conference Proceedings (OSTI)

This article pragmatically reviews and appraises significant technology and efforts directed toward enhancing application program development and productivity and the challenging automatic generation of application programs. The topics covered are: decision ... Keywords: COBOL generators, automated information system development, automatic program generation, automatic programming, customizers, database generation, problem statement languages, software automation, special purpose languages

Alfonso F. Cardenas

1977-09-01T23:59:59.000Z

10

Install an Automatic Blowdown Control System  

SciTech Connect

This revised ITP steam tip sheet on installing automatic blowdown controls provide how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

Not Available

2006-01-01T23:59:59.000Z

11

Automatic generation of random self-checking test cases  

Science Conference Proceedings (OSTI)

A technique of automatically generating random software test cases is described. The nature of such test cases ensures that they will execute to completion, and their execution is predicted at the time of generation. Wherever possible the test cases ...

D. L. Bird; C. U. Munoz

1983-03-01T23:59:59.000Z

12

Automatic generation of random self-checking test cases  

Science Conference Proceedings (OSTI)

A technique of automatically generating random software test cases is described. The nature of such test cases ensures that they will execute to completion, and their execution is predicted at the time of generation. Wherever possible the test cases ...

D. L. Bird; C. U. Munoz

1983-09-01T23:59:59.000Z

13

Requirements for Automatically Generating Multi-Modal Interfaces for Complex Appliances  

E-Print Network (OSTI)

Several industrial and academic research groups are working to simplify the control of appliances and services by creating a truly universal remote control. Unlike the preprogrammed remote controls available today, these new controllers download a specification from the appliance or service and use it to automatically generate a remote control interface. This promises to be a useful approach because the specification can be made detailed enough to generate both speech and graphical interfaces. Unfortunately, generating good user interfaces can be difficult. Based on user studies and prototype implementations, this paper presents a set of requirements that we have found are needed for automatic interface generation systems to create high-quality user interfaces.

Jeffrey Nichols; Brad Myers; Thomas K. Harris; Roni Rosenfeld; Stefanie Shriver

2002-01-01T23:59:59.000Z

14

Automatic test generation using genetically-engineered distinguishing sequences  

Science Conference Proceedings (OSTI)

A fault-oriented sequential circuit test generator is described in which various types of distinguishing sequences are derived, both statically and dynamically, to aid the test generation process. A two-phase algorithm is used during test generation. ... Keywords: DIGATE, automatic test generation, automatic testing, distinguishing sequence, fault diagnosis, fault effects, flip-flops, genetic algorithm, genetic algorithms, logic testing, sequences, sequential circuit, sequential circuits, two-phase algorithm

M. S. Hsiao; E. M. Rudnick; J. H. Patel

1996-04-01T23:59:59.000Z

15

Automatic control in electric power systems  

Science Conference Proceedings (OSTI)

The recent progress in the application of automatic controls to electric power systems is outlined. After a brief review of present trends in power system planning and operation, the role of computers and of modern control methods and techniques in optimal ...

G. Quazza

1970-01-01T23:59:59.000Z

16

Automatic generation of executable communication specifications from parallel applications  

Science Conference Proceedings (OSTI)

Portable parallel benchmarks are widely used and highly effective for (a) the evaluation, analysis and procurement of high-performance computing (HPC) systems and (b) quantifying the potential benefits of porting applications for new hardware platforms. Yet, past techniques to synthetically parameterized hand-coded HPC benchmarks prove insufficient for today's rapidly-evolving scientific codes particularly when subject to multi-scale science modeling or when utilizing domain-specific libraries. To address these problems, this work contributes novel methods to automatically generate highly portable and customizable communication benchmarks from HPC applications. We utilize ScalaTrace, a lossless, yet scalable, parallel application tracing framework to collect selected aspects of the run-time behavior of HPC applications, including communication operations and execution time, while abstracting away the details of the computation proper. We subsequently generate benchmarks with identical run-time behavior from the collected traces. A unique feature of our approach is that we generate benchmarks in CONCEPTUAL, a domain-specific language that enables the expression of sophisticated communication patterns using a rich and easily understandable grammar yet compiles to ordinary C + MPI. Experimental results demonstrate that the generated benchmarks are able to preserve the run-time behavior - including both the communication pattern and the execution time - of the original applications. Such automated benchmark generation is particularly valuable for proprietary, export-controlled, or classified application codes: when supplied to a third party. Our auto-generated benchmarks ensure performance fidelity but without the risks associated with releasing the original code. This ability to automatically generate performance-accurate benchmarks from parallel applications is novel and without any precedence, to our knowledge.

Pakin, Scott [Los Alamos National Laboratory; Wu, Xing [NCSU; Mueller, Frank [NCSU

2011-01-19T23:59:59.000Z

17

An evaluation of an automatically generated compiler  

Science Conference Proceedings (OSTI)

Compilers or language translators can be generated using a variety of formal specification techniques. Whether generation is worthwhile depends on the effort required to specify the translation task and the quality of the generated compiler. A systematic ... Keywords: compiler generation

Anthony M. Sloane

1995-09-01T23:59:59.000Z

18

A novel approach to automatic gazetteer generation using Wikipedia  

Science Conference Proceedings (OSTI)

Gazetteers or entity dictionaries are important knowledge resources for solving a wide range of NLP problems, such as entity extraction. We introduce a novel method to automatically generate gazetteers from seed lists using an external knowledge resource, ...

Ziqi Zhang; José Iria

2009-08-01T23:59:59.000Z

19

Automatic metadata generation using associative networks  

Science Conference Proceedings (OSTI)

In spite of its tremendous value, metadata is generally sparse and incomplete, thereby hampering the effectiveness of digital information services. Many of the existing mechanisms for the automated creation of metadata rely primarily on content analysis ... Keywords: Associative networks, metadata generation, particle-swarms

Marko A. Rodriguez; Johan Bollen; Herbert Van De Sompel

2009-02-01T23:59:59.000Z

20

An Automatic Load Sharing Approach for a DFIG Based Wind Generator in a Microgrid  

E-Print Network (OSTI)

An Automatic Load Sharing Approach for a DFIG Based Wind Generator in a Microgrid M. A. Barik and H.ravishankar@unsw.edu.au Abstract--The aim of this paper is to manage the load variation of a microgrid by controlling the wind by simulating a benchmark microgrid test system. Simulation results show that the proposed control scheme

Pota, Himanshu Roy

Note: This page contains sample records for the topic "automatic generation control" 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 survey on guiding logic for automatic user interface generation  

Science Conference Proceedings (OSTI)

Mobile devices and other computationally-capable artifacts are presenting new ways in which to interact with our applications and data. However, to do so effectively requires user interfaces that are optimized for the target platform. Designing such ... Keywords: adaptation, automatic user interface generation

Gaurav Dubey

2011-07-01T23:59:59.000Z

22

Automatic Generation of Tcl Bindings for C and C++ Libraries  

E-Print Network (OSTI)

Automatic Generation of Tcl Bindings for C and C++ Libraries Wolfgang Heidrich Computer Graphics@informatik.uni-erlangen.de Abstract In the past few years Tcl has found widespread in- terest as a extensible scripting language. Numerous Tcl interfaces for a variety of C libraries have been created. While most of these language

Heidrich, Wolfgang

23

automatic  

Science Conference Proceedings (OSTI)

... automatic — Set parameters automatically. Description. Many OOF2 parameters can be set automatically when you cannot or will not do it yourself. ...

2013-08-23T23:59:59.000Z

24

Automatic Digital Surface Model (DSM) Generation from Linear Array Images  

E-Print Network (OSTI)

the ability to acquire more than 2 views of the terrain surface during a single flight line or orbit by far not live up to the standards set by manual measurements. Therefore, efforts have to be made and automatic quality control, and works with a coarse-to-fine hierarchical matching strategy. The most

Giger, Christine

25

Huddle: automatically generating interfaces for systems of multiple connected appliances  

E-Print Network (OSTI)

Systems of connected appliances, such as home theaters and presentation rooms, are becoming commonplace in our homes and workplaces. These systems are often difficult to use, in part because users must determine how to split the tasks they wish to perform into sub-tasks for each appliance and then find the particular functions of each appliance to complete their sub-tasks. This paper describes Huddle, a new system that automatically generates taskbased interfaces for a system of multiple appliances based on models of the content flow within the multi-appliance system. ACM Classification: H5.2 [Information interfaces and

Jeffrey Nichols; On Rothrock; Duen Horng Chau; Brad A. Myers

2006-01-01T23:59:59.000Z

26

Source templates for the automatic generation of adjoint code through static call graph reversal  

Science Conference Proceedings (OSTI)

We present a new approach to the automatic generation of adjoint codes using automatic differentiation by source transformation. Our method relies on static checkpointing techniques applied to an extended version of the program's call graph. A code ...

Uwe Naumann; Jean Utke

2005-05-01T23:59:59.000Z

27

Control circuit for automatic battery chargers  

SciTech Connect

An improved battery charger apparatus having a control circuit providing different charging periods which are automatically correlated with the type of battery connected to the charge for charging the connected battery to a preselected full charge state. The apparatus has a charging circuit for charging the battery, a sensing circuit for sensing the state of the battery during charging thereof by the charging circuit and a circuit for determining first and second predetermined reference voltage/current states. The apparatus causes the charging of the battery at a preselected initial charging level for an initial time period and establishes a first finish time period. The apparatus further determines a first time at which the state of the battery reaches the first predetermined referenced voltage/current state during the initial time period, and causes the charging circuit to continue to charge the battery at a preselected first charging level after the determination of the first time for a first finish time period. The apparatus further establishes a second finish time period and determines a second time at which the state of the battery reaches the second predetermined referenced voltage/current state during the first finish time period. The apparatus terminates charging of the battery if the state of the battery does not reach the second predetermined referenced voltage/current state during the first finish time period, and causes the charging circuit to continue to charge the battery at a preselected second charging level after the determination of the second time for a second finish time period.

Lambert, F.J.; Bosack, D.J.; Johansen, D.K.

1984-05-22T23:59:59.000Z

28

Control system for wind-powered generators  

DOE Green Energy (OSTI)

In a system of wind-powered generators, a reliable yet inexpensive control system is desirable. Such a system would be completely automatic so it could be left unattended for long periods. It would respond to electrical representations of data such as bearing temperature, vibration, wind velocity, turbine velocity, torque, or any other pertinent data. It would respond by starting or stopping the turbine, controlling the loading, or sounding an alarm. A microprocessor-based controller capable of these functions is described.

Kroth, G.J.

1977-05-01T23:59:59.000Z

29

Adaptive control of hydraulic shift actuation in an automatic transmission  

E-Print Network (OSTI)

A low-order dynamic model of a clutch for hydraulic control in an automatic transmission is developed by separating dynamics of the shift into four regions based on clutch piston position. The first three regions of the ...

Thornton, Sarah Marie

2013-01-01T23:59:59.000Z

30

Using PL/SQL to automatically enhance CASE*Generator 2.0 generated forms  

SciTech Connect

The SQL{trademark} Forms generator in CASE{trademark} Generator can generate forms with many useful capabilities. Generated forms can be further enhanced by the use of the CASE{trademark} Generator forms template. The template can be used to make these capabilities easily included in every form in a system. However, there are times when capabilities need to be added to all of the forms in a system, that cannot be implemented with the generator or template. This is especially true when generated block and field level triggers have to be modified. This paper describe how PL/SQL can be used to modify the generated forms. CASE{trademark} Generator can be configured to perform these modifications automatically. Three examples of modifications that have been made using this technique will also be detailed.

Atkins, K.D. [Boeing Computer Services, Richland, WA (United States)

1994-03-01T23:59:59.000Z

31

Automatic Generation of Tcl Bindings for C and C++ Libraries  

E-Print Network (OSTI)

In the past few years Tcl has found widespread interest as a extensible scripting language. Numerous Tcl interfaces for a variety of C libraries have been created. While most of these language bindings have been created by hand, others have made use of dedicated code generators designed for the specific library. In this paper we present a tool for the automatic generation of Tcl language bindings for arbitrary C libraries. Moreover, the mapping of C++ class hierarchies to [incr Tcl] classes will be described. 1 Introduction 1.1 Prior Work One of the reasons for the recent success of Tcl is its powerful API to C and C++, which allows the extension of the core language with commands implemented as C functions. This facility has been used to create a variety of language bindings for C libraries, ranging from different 3D graphics libraries (iris gl, OpenGL, vogle, sipp) to several X widget sets, for example Wafe and tclMotif. While most of this work has been done manually, other bind...

Wolfgang Heidrich; Philipp Slusallek

1995-01-01T23:59:59.000Z

32

Automatic ID heat load generation in ANSYS code  

SciTech Connect

Detailed power density profiles are critical in the execution of a thermal analysis using a finite element (FE) code such as ANSYS. Unfortunately, as yet there is no easy way to directly input the precise power profiles into ANSYS. A straight-forward way to do this is to hand-calculate the power of each node or element and then type the data into the code. Every time a change is made to the FE model, the data must be recalculated and reentered. One way to solve this problem is to generate a set of discrete data, using another code such as PHOTON2, and curve-fit the data. Using curve-fitted formulae has several disadvantages. It is time consuming because of the need to run a second code for generation of the data, curve-fitting, and doing the data check, etc. Additionally, because there is no generality for different beamlines or different parameters, the above work must be repeated for each case. And, errors in the power profiles due to curve-fitting result in errors in the analysis. To solve the problem once and for all and with the capability to apply to any insertion device (ID), a program for ED power profile was written in ANSYS Parametric Design Language (APDL). This program is implemented as an ANSYS command with input parameters of peak magnetic field, deflection parameter, length of ID, and distance from the source. Once the command is issued, all the heat load will be automatically generated by the code.

Wang, Zhibi

1992-04-30T23:59:59.000Z

33

Feasibility and Importance of an Automatic Controller for Solar Hot Water System  

Science Conference Proceedings (OSTI)

Being a developing country, Bangladesh has a very poor condition in terms of generating electricity. Alongside, natural resources like fuel and coal are in limited amount and will not be able to sustain forever. As a result, sustainable energy is starting ... Keywords: automatic, solar, heater, controller, microcontroller, relay, LCD, valve

M. R. Hasan; A. Rahman; A. Azad

2011-10-01T23:59:59.000Z

34

Generating Remote Control Interfaces for Complex Appliances  

E-Print Network (OSTI)

The personal universal controller (PUC) is an approach for improving the interfaces to complex appliances by introducing an intermediary graphical or speech interface. A PUC engages in two-way communication with everyday appliances, first downloading a specification of the appliance's functions, and then automatically creating an interface for controlling that appliance. The specification of each appliance includes a high-level description of every function, a hierarchical grouping of those functions, and dependency information, which relates the availability of each function to the appliance's state. Dependency information makes it easier for designers to create specifications and helps the automatic interface generators produce a higher quality result. We describe the architecture that supports the PUC, and the interface generators that use our specification language to build high-quality graphical and speech interfaces.

Jeffrey Nichols; Brad A. Myers; Michael Higgins; Joseph Hughes; Thomas K. Harris; Roni Rosenfeld; Mathilde Pignol

2002-01-01T23:59:59.000Z

35

Automatic control and management of electrostatic precipitator  

Science Conference Proceedings (OSTI)

The efficient operation of an electrostatic precipitator (ESP) in practice depends upon many variables, such as charging method, particle size, gas flow, temperature, dust resistivity, etc. With the air pollution control requirements becoming increasingly stringent, it is essential to closely monitor and accurately control the key parameters of an ESP control system. The efficient functioning of an ESP normally means minimizing power consumption and maximizing dust collection. Several control strategies can be adopted to meet this broad requirement. In this paper, a distributed control technique of an ESP, which uses the actual dust emission and boiler load as feedback inputs has been explained. The Electrostatic Precipitator Management System, which is a system designed by Bharat Heavy Electricals Ltd., Hyderabad, India, to meet the above control strategies using the distributed architecture to achieve efficient ESP operation is also described.

Durga Prasad, N.V.P.R.; Lakshminarayana, T.; Narasimham, J.R.K.; Verman, T.M.; Krishnam Raju, C.S.R. [Bharat Heavy Electricals Ltd., Hyderabad (India). Programmable Control Systems Lab.

1999-05-01T23:59:59.000Z

36

Automatically Generating Wikipedia Articles: A Structure-Aware Approach  

E-Print Network (OSTI)

In this paper, we investigate an approach for creating a comprehensive textual overview of a subject composed of information drawn from the Internet. We use the high-level structure of human-authored texts to automatically ...

Sauper, Christina Joan

37

NN-Based Near Real Time Load Prediction for Optimal Generation Control  

Science Conference Proceedings (OSTI)

In the environment of ongoing deregulated power industry, traditional automatic generation control (AGC) has become a set of ancillary services traded in separate markets which are different than the energy market. The performance of AGC is mandated ... Keywords: Automatic Generation Control (AGC), Control Performance Standard (CPS), Dynamic Economic Dispatch, Hierarchical Neural Network, Load Dynamics, Very Short Term Load Prediction (VSTLP)

Dingguo Chen

2008-09-01T23:59:59.000Z

38

Automatic generation of CSP || B skeletons from xUML models  

E-Print Network (OSTI)

Automatic generation of CSP || B skeletons from xUML models Edward Turner, Helen Treharne, Steve. CSP B is a formal approach to specification that combines CSP and B. In this paper we present our tool that automatically trans- lates a subset of executable UML (xUML) models into CSP B, for the purpose of verification

Doran, Simon J.

39

Injection engine as a control object. II. Problems of automatic control of the engine  

Science Conference Proceedings (OSTI)

Specific features of injection engine as a control object are discussed, strict formulations of problems of engine automatic control and principles of their solution are presented. Examples of solution of the problem of stabilization of air-fuel ratio ...

D. N. Gerasimov; H. Javaherian; D. V. Efimov; V. O. Nikiforov

2010-12-01T23:59:59.000Z

40

An Automatic Control System for Conditioning 30 GHz Accelerating Structures  

E-Print Network (OSTI)

A software application programme has been developed to allow fast and automatic high-gradient conditioning of accelerating structures at 30 GHz in CTF3. The specificity of the application is the ability to control the high-power electron beam which produces the 30 GHz RF power used to condition the accelerating structures. The programme permits operation round the clock with minimum manpower requirements. In this paper the fast control system, machine control system, logging system, graphical user control interface and logging data visualization are described. An outline of the conditioning control system itself and of the feedback controlling peak power and pulse length is given. The software allows different types of conditioning strategies to be programmed

Dubrovskiy, A

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

An automatic method for generating affine moment invariants  

Science Conference Proceedings (OSTI)

Affine moment invariants are important if one wants to recognize the surface of a plane in three dimensions when the orientation of the plane is not known beforehand and only two-dimensional information is available. The notion of generating function ... Keywords: Affine invariant, Affine transformation, Generating invariants, Pattern recognition

Jin Liu; Deren Li; Wenbing Tao; Li Yan

2007-12-01T23:59:59.000Z

42

Automatic Code Generation From UML Class and Statechart Diagrams  

E-Print Network (OSTI)

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

Tanaka, Jiro

43

Intermediate leak protection/automatic shutdown for B and W helical coil steam generator  

SciTech Connect

The report summarizes a follow-on study to the multi-tiered Intermediate Leak/Automatic Shutdown System report. It makes the automatic shutdown system specific to the Babcock and Wilcox (B and W) helical coil steam generator and to the Large Development LMFBR Plant. Threshold leak criteria specific to this steam generator design are developed, and performance predictions are presented for a multi-tier intermediate leak, automatic shutdown system applied to this unit. Preliminary performance predictions for application to the helical coil steam generator were given in the referenced report; for the most part, these predictions have been confirmed. The importance of including a cover gas hydrogen meter in this unit is demonstrated by calculation of a response time one-fifth that of an in-sodium meter at hot standby and refueling conditions.

1981-01-01T23:59:59.000Z

44

Eclat: Automatic Generation and Classification of Test Inputs  

E-Print Network (OSTI)

This paper describes a technique that helps a test engineerselect, from a large set of randomly generated testinputs, a small subset likely to reveal faults in the softwareunder test. The technique takes a program or ...

Pacheo, Carlos

2004-10-14T23:59:59.000Z

45

Automatic generation of water distribution systems based on GIS data  

Science Conference Proceedings (OSTI)

In the field of water distribution system (WDS) analysis, case study research is needed for testing or benchmarking optimisation strategies and newly developed software. However, data availability for the investigation of real cases is limited due to ... Keywords: Algorithmic network generation, GIS-data, Hydraulic simulation, Modular design system, Water distribution system

Robert Sitzenfrei, Michael MöDerl, Wolfgang Rauch

2013-09-01T23:59:59.000Z

46

Automatic Identification of Shaft Orbits for Steam Turbine Generator Sets  

Science Conference Proceedings (OSTI)

The shaft orbits and dynamic characteristics of the shaft centre orbit contain abundant information for the fault diagnosis of rotating machinery and reflect different faults of rotating machine. Therefore the shaft orbits recognition plays an important ... Keywords: shaft orbit, steam turbine generator sets, morphological filter, invariant moment, BP neural network

Changfeng Yan; Hao Zhang; Hui Li; Li Yang; Wen Huang

2009-05-01T23:59:59.000Z

47

Revisiting the Steam-Boiler Case Study with LUTESS : Modeling for Automatic Test Generation  

E-Print Network (OSTI)

Revisiting the Steam-Boiler Case Study with LUTESS : Modeling for Automatic Test Generation. In this paper, we apply this modeling principle to a well known case study, the steam boiler problem which has model and to assess the difficulty of such a process in a realistic case study. The steam boiler case

Paris-Sud XI, Université de

48

Automatic Generation of Symbolic Reliability Functions for Processor-Memory-Switch Structures  

Science Conference Proceedings (OSTI)

Calculation of the reliability of computer system architectures with built-in redundancy, such as multiprocessors, is gaining in importance. The task of computing the reliability function for arbitrary Processor-Memory-Switch (PMS) interconnection structures, ... Keywords: symbolic hard-failure reliability functions, Automatic generation of symbolic reliability functions, processor-memory-switch (PMS) structures, reliability computation program

V. Kini; D. P. Siewiorek

1982-08-01T23:59:59.000Z

49

Simulation-based automatic generation of signomial and posynomial performance models for analog integrated circuit sizing  

Science Conference Proceedings (OSTI)

This paper presents a method to automatically generate posynomial response surface models for the performance parameters of analog integrated circuits. The posynomial models enable the use of efficient geometric programming techniques for circuit sizing ... Keywords: analog circuit modeling, design of experiments, geometric programming, posynomial and signomial response surface modeling

Walter Daems; Georges Gielen; Willy Sansen

2001-11-01T23:59:59.000Z

50

Closed loop computer control for an automatic transmission  

DOE Patents (OSTI)

In an automotive vehicle having an automatic transmission that driveably connects a power source to the driving wheels, a method to control the application of hydraulic pressure to a clutch, whose engagement produces an upshift and whose disengagement produces a downshift, the speed of the power source, and the output torque of the transmission. The transmission output shaft torque and the power source speed are the controlled variables. The commanded power source torque and commanded hydraulic pressure supplied to the clutch are the control variables. A mathematical model is formulated that describes the kinematics and dynamics of the powertrain before, during and after a gear shift. The model represents the operating characteristics of each component and the structural arrangement of the components within the transmission being controlled. Next, a close loop feedback control is developed to determine the proper control law or compensation strategy to achieve an acceptably smooth gear ratio change, one in which the output torque disturbance is kept to a minimum and the duration of the shift is minimized. Then a computer algorithm simulating the shift dynamics employing the mathematical model is used to study the effects of changes in the values of the parameters established from a closed loop control of the clutch hydraulic and the power source torque on the shift quality. This computer simulation is used also to establish possible shift control strategies. The shift strategies determined from the prior step are reduced to an algorithm executed by a computer to control the operation of the power source and the transmission.

Patil, Prabhakar B. (Detroit, MI)

1989-01-01T23:59:59.000Z

51

System for computer controlled shifting of an automatic transmission  

DOE Patents (OSTI)

In an automotive vehicle having an automatic transmission that driveably connects a power source to the driving wheels, a method to control the application of hydraulic pressure to a clutch, whose engagement produces an upshift and whose disengagement produces a downshift, the speed of the power source, and the output torque of the transmission. The transmission output shaft torque and the power source speed are the controlled variables. The commanded power source torque and commanded hydraulic pressure supplied to the clutch are the control variables. A mathematical model is formulated that describes the kinematics and dynamics of the powertrain before, during and after a gear shift. The model represents the operating characteristics of each component and the structural arrangement of the components within the transmission being controlled. Next, a close loop feedback control is developed to determine the proper control law or compensation strategy to achieve an acceptably smooth gear ratio change, one in which the output torque disturbance is kept to a minimum and the duration of the shift is minimized. Then a computer algorithm simulating the shift dynamics employing the mathematical model is used to study the effects of changes in the values of the parameters established from a closed loop control of the clutch hydraulic and the power source torque on the shift quality. This computer simulation is used also to establish possible shift control strategies. The shift strategies determine from the prior step are reduced to an algorithm executed by a computer to control the operation of the power source and the transmission.

Patil, Prabhakar B. (Detroit, MI)

1989-01-01T23:59:59.000Z

52

Automatic generation of bas-reliefs from 3D shapes  

E-Print Network (OSTI)

generated by our method and their profiles (middle images). A bas-relief of the Stanford Armadillo model on a bended cylinder (most-right image). In this paper, we introduce and study a new problem of converting a given 3D shape (or a 2.5D range data) into a bas-relief. The problem can be considered as a geometry counterpart of the HDR image compression problem widely studied in computer graphics. In our approach to the shape bas-reliefing problem, we combine the concepts of mesh saliency, shape exaggerating, and discrete differential coordinates. The final bas-relief has a small width, preserves salient features of the original 3D shape, and, therefore, can be used for shape decorating purposes. 1

Wenhao Song; Alexander Belyaev; Hans-peter Seidel

2007-01-01T23:59:59.000Z

53

Computer controllable synchronous shifting of an automatic transmission  

DOE Patents (OSTI)

A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the torque at the output of the transmission or drive wheels, the speed of the power source, and the hydraulic pressure applied to a clutch and brake. A control algorithm produces input data representing a commanded upshift, a commanded downshift, a commanded transmission output torque, and commanded power source speed. A microprocessor processes the inputs and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake at a rate that satisfies the requirements for a short gear ratio change and smooth torque transfer between the friction elements. 6 figs.

Davis, R.I.; Patil, P.B.

1989-08-08T23:59:59.000Z

54

Computer controlled synchronous shifting of an automatic transmission  

DOE Patents (OSTI)

A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the torque at the output of the transmission or drive wheels, the speed of the power source, and the hydraulic pressure applied to a clutch and brake. A control algorithm produces input data representing a commanded upshift, a commanded downshift, a commanded transmission output torque, and commanded power source speed. A microprocessor processes the inputs and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake at a rate that satisfies the requirements for a short gear ratio change and smooth torque transfer between the friction elements.

Davis, Roy I. (9214 Abbey La., Ypsilanti, MI 48198); Patil, Prabhakar B. (10294 W. Outer Dr., Detroit, MI 48223)

1989-01-01T23:59:59.000Z

55

Automatic generation of stop word lists for information retrieval and analysis  

DOE Patents (OSTI)

Methods and systems for automatically generating lists of stop words for information retrieval and analysis. Generation of the stop words can include providing a corpus of documents and a plurality of keywords. From the corpus of documents, a term list of all terms is constructed and both a keyword adjacency frequency and a keyword frequency are determined. If a ratio of the keyword adjacency frequency to the keyword frequency for a particular term on the term list is less than a predetermined value, then that term is excluded from the term list. The resulting term list is truncated based on predetermined criteria to form a stop word list.

Rose, Stuart J

2013-01-08T23:59:59.000Z

56

Automatic Table Ground Truth Generation and a Background-Analysis-Based Table Structure Extraction  

E-Print Network (OSTI)

In this paper, we first describe an automatic table ground truth generation system which can efficiently generate a large amount of accurate table ground truth suitable for the development of table detection algorithms. Then a novel background-analysis-based, coarse-to-fine table identification algorithm and an X-Y cut table decomposition algorithm are described. We discuss an experimental protocol to evaluate the table detection algorithms. For a total of having vin table entities and a total cell entities, our table detection algorithm takes line, word segmentation results as input and obtains around cell correct detection rates.

Yalin Wang; Ihsin T. Phillips; Robert Haralick

2001-01-01T23:59:59.000Z

57

An Automatically Controlled Electrical Heating System for Use in an Explosive Environment  

SciTech Connect

An automatically controlled electrical heating system was developed to heat specific components of a compacting system for the production of explosive pellets. The electrical heating system was designed for application in a hazardous environment.

Page, D. O.; Draut, C. F.

1974-08-08T23:59:59.000Z

58

Knowledge representations for the automatic generation of numerical simulators for PDEs  

Science Conference Proceedings (OSTI)

In this paper we describe an automatic programming (AP) system which generates numerical discretization schemes for partial differential equation (PDE) problems. This system is based on the observation that a wide variety of discretization schemes can be mechanically produced by computing surface integrals of spacetime currents. However, surface integration is difficult to carry out using conventional vector calculus. For this reason, the system is structured to include the differential geometry formalisms which make high dimensional surface integration simple. The differential geometry formalisms have also simplified the representation of continuous physics problems and increased the domain of applicability of the system. 10 refs., 1 fig., 3 tabs.

Balaban, D.; Garbarini, J.; Greiman, W.; Durst, M. (Lawrence Livermore National Lab., CA (USA); Lawrence Berkeley Lab., CA (USA); Lawrence Livermore National Lab., CA (USA))

1989-02-21T23:59:59.000Z

59

The Quantum Governor: Automatic quantum control and reduction of the influence of noise without measuring  

E-Print Network (OSTI)

The problem of automatically protecting a quantum system against noise in a closed circuit is analyzed. A general scheme is developed built from two steps. At first, a distillation step is induced in which undesired components are removed to another degree of freedom of the system. Later a recovering step is employed which the system gains back its initial density. An Optimal-Control method is used to generate the distilling operator. The scheme is demonstrated by a simulation of a two level byte influenced by white noise. Undesired deviations from the target were shown to be reduced by at least two orders of magnitude on average. The relations between the quantum version of the classical Watt's Governor and the field of quantum information are also discussed.

Kallush, S

2005-01-01T23:59:59.000Z

60

The Quantum Governor: Automatic quantum control and reduction of the influence of noise without measuring  

E-Print Network (OSTI)

The problem of automatically protecting a quantum system against noise in a closed circuit is analyzed. A general scheme is developed built from two steps. At first, a distillation step is induced in which undesired components are removed to another degree of freedom of the system. Later a recovering step is employed which the system gains back its initial density. An Optimal-Control method is used to generate the distilling operator. The scheme is demonstrated by a simulation of a two level byte influenced by white noise. Undesired deviations from the target were shown to be reduced by at least two orders of magnitude on average. The relations between the quantum version of the classical Watt's Governor and the field of quantum information are also discussed.

S. Kallush; R. Kosloff

2005-11-21T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

Heat engine generator control system  

SciTech Connect

An electrical power generation system includes a heat engine having an output member operatively coupled to the rotor of a dynamoelectric machine. System output power is controlled by varying an electrical parameter of the dynamoelectric machine. A power request signal is related to an engine speed and the electrical parameter is varied in accordance with a speed control loop. Initially, the sense of change in the electrical parameter in response to a change in the power request signal is opposite that required to effectuate a steady state output power consistent with the power request signal. Thereafter, the electrical parameter is varied to converge the output member speed to the speed known to be associated with the desired electrical output power.

Rajashekara, Kaushik (Carmel, IN); Gorti, Bhanuprasad Venkata (Towson, MD); McMullen, Steven Robert (Anderson, IN); Raibert, Robert Joseph (Fishers, IN)

1998-01-01T23:59:59.000Z

62

Heat engine generator control system  

DOE Patents (OSTI)

An electrical power generation system includes a heat engine having an output member operatively coupled to the rotor of a dynamoelectric machine. System output power is controlled by varying an electrical parameter of the dynamoelectric machine. A power request signal is related to an engine speed and the electrical parameter is varied in accordance with a speed control loop. Initially, the sense of change in the electrical parameter in response to a change in the power request signal is opposite that required to effectuate a steady state output power consistent with the power request signal. Thereafter, the electrical parameter is varied to converge the output member speed to the speed known to be associated with the desired electrical output power. 8 figs.

Rajashekara, K.; Gorti, B.V.; McMullen, S.R.; Raibert, R.J.

1998-05-12T23:59:59.000Z

63

Automatic generation of weather forecast texts using comprehensive probabilistic generation-space models  

Science Conference Proceedings (OSTI)

Two important recent trends in natural language generation are (i) probabilistic techniques and (ii) comprehensive approaches that move away from traditional strictly modular and sequential models. This paper reports experiments in which pCRU ...

Anja Belz

2008-10-01T23:59:59.000Z

64

Microcomputer-controlled two-pulse generator  

SciTech Connect

The two-pulse generator generates trains of pulses whose parameters are specified by an Elektronika D3-28 microcomputer. The pulse durations are 1-128 usec, the intervals are 1-2048 usec, and the repetition periods are from 4 msec to 16 sec. In conjunction with an automated system, the generator allows automatic measurement of spin-spin and spin-lattice relaxation times in nuclear quadrupole resonance, setting of optimum pulse-train parameters (90-180 degrees), etc.

Boguslavskii, A.A.; Ermilov, V.V.; Pechenov, V.V.; Semin, G.K.; Shapiro, G.Y.

1986-07-01T23:59:59.000Z

65

Survey Automatic control in microelectronics manufacturing: Practices, challenges, and possibilities  

Science Conference Proceedings (OSTI)

Advances in modeling and control will be required to meet future technical challenges in microelectronics manufacturing. The implementation of closed-loop control on key unit operations has been limited due to a dearth of suitable in situ measurements, ... Keywords: End point control, Factory automation, Microelectronics manufacturing, Predictive control, Process control, Quality control, Sensors, Temperature control

Thomas F. Edgar; Stephanie W. Butler; W.Jarrett Campbell; Carlos Pfeiffer; Christopher Bode; Sung Bo Hwang; K. S. Balakrishnan; J. Hahn

2000-11-01T23:59:59.000Z

66

An Automatic Control System for a Manufacturing Process in an Explosive Environment  

SciTech Connect

The authors describe a state-of-the-art automatic control system as it is used to control a manufacturing process in an explosive environment. Compact, explosion proof sensing devices and a custom designed interface to a controller input are discussed.

Page, D. O; Draut, C. F.

1973-06-01T23:59:59.000Z

67

FlySPEC: a multi-user video camera system with hybrid human and automatic control  

Science Conference Proceedings (OSTI)

FlySPEC is a video camera system designed for real-time remote operation. A hybrid design combines the high resolution of an optomechanical video camera with the wide field of view always available from a panoramic camera. The control system integrates ... Keywords: collaborative and automatic camera control, distance learning, gesture based camera control, panoramic video, video communication, video conferencing, video production, webcams

Qiong Liu; Don Kimber; Jonathan Foote; Lynn Wilcox; John Boreczky

2002-12-01T23:59:59.000Z

68

Control system for fluid heated steam generator  

DOE Patents (OSTI)

A control system for controlling the location of the nucleate-boiling region in a fluid heated steam generator comprises means for measuring the temperature gradient (change in temperature per unit length) of the heating fluid along the steam generator; means for determining a control variable in accordance with a predetermined function of temperature gradients and for generating a control signal in response thereto; and means for adjusting the feedwater flow rate in accordance with the control signal.

Boland, James F. (Bonneville County, ID); Koenig, John F. (Idaho Falls, ID)

1985-01-01T23:59:59.000Z

69

Control system for fluid heated steam generator  

DOE Patents (OSTI)

A control system for controlling the location of the nucleate-boiling region in a fluid heated steam generator comprises means for measuring the temperature gradient (change in temperature per unit length) of the heating fluid along the steam generator; means for determining a control variable in accordance with a predetermined function of temperature gradients and for generating a control signal in response thereto; and means for adjusting the feedwater flow rate in accordance with the control signal.

Boland, J.F.; Koenig, J.F.

1984-05-29T23:59:59.000Z

70

Automatic Minimum and Maximum Alarm Thresholds for Quality Control  

Science Conference Proceedings (OSTI)

Automated quality control is a necessity for meteorological measurement networks because of an ever-increasing number of measurements. One of the basic quality control tests is to check that the observations fall into a range of acceptable ...

Vesa Hasu; Ari Aaltonen

2011-01-01T23:59:59.000Z

71

Transient Control Level Test Generators  

Science Conference Proceedings (OSTI)

... final determination should be made by direct measurement at ... by the regulation of the generator, must be ... of the timing circuit used to drive the relay ...

2013-05-17T23:59:59.000Z

72

Automatic Test Case Generation Using Multi-protocol Test Method Soo-in Lee, Yongbum Park, and Myungchul Kim  

E-Print Network (OSTI)

Automatic Test Case Generation Using Multi-protocol Test Method Soo-in Lee, Yongbum Park, mckim}@icu.ac.kr Abstract - A method for testing multi-protocol implementation under test (IUT) with a single test suite has been proposed in the literature. It tests a multi-protocol IUT in an integrated way

Lee, Ben

73

Automatic generation of dynamic virtual fences as part of BIM-based prevention program for construction safety  

Science Conference Proceedings (OSTI)

The present research aims to investigate a new method for the automatic generation of Dynamic Virtual Fences (DVFs) as part of a BIM-based prevention program for construction safety following the Safety Code of Quebec Provence in Canada. First, the Safety ...

Amin Hammad; Shayan Setayeshgar; Cheng Zhang; Yoosef Asen

2012-12-01T23:59:59.000Z

74

Automatic lighting controls demonstration: Long-term results  

SciTech Connect

An advanced electronically ballasted lighting control system was installed in a portion of an office building to measure the energy and demand savings. The lighting control system used an integrated lighting control scenario that included daylight following, lumen depreciation correction, and scheduling. The system reduced lighting energy on weekdays by 62% and 51% in the north and south daylit zones, respectively, compared to a reference zone that did not have controls. During the summer, over 75% energy savings were achieved on weekdays in the north daylit zone. Even in the south interior zone, which benefitted lime from daylight, correction strategies and adjustment of the aisleway lights to a low level resulted in energy use of only half that of the reference zone. Although, in general, the savings varied over the year due to changing daylight conditions, the energy reduction achieved with controls could be fit using a simple analytical model. Significant savings also occurred during core operating hours when it is more expensive to supply and use energy. Compared to the usage in the reference zone, energy reductions of 49%, 44%, and 62% were measured in the south daylight, south interior, and north daylight zones, respectively, during core operating hours throughout the year. Lighting energy usage on weekends decreased dramatically in the zones with controls, with the usage in the north daylit zone only 10% that of the reference zone. A simple survey developed to assess occupant response to the lighting control system showed that the occupants were satisfied with the light levels provided.

Rubinstein, F. (Lawrence Berkeley Lab., CA (United States))

1991-10-18T23:59:59.000Z

75

Self-powered automatic secondary air controllers for woodstoves and small furnaces  

DOE Patents (OSTI)

This invention relates to the regulation of combustion in woodstoves, small furnaces and the like, so as to produce efficient combustion, while maximizing the possible heat output and minimizing air pollution. More specifically, the invention relates to controllers for automatically regulating and the supply of secondary combustion air to woodstoves, small furnaces or the like. 9 figs.

Siemer, D.D.

1989-03-15T23:59:59.000Z

76

Wind turbine with automatic pitch and yaw control  

DOE Patents (OSTI)

A wind turbine having a flexible central beam member supporting aerodynamic blades at opposite ends thereof and fabricated of uni-directional high tensile strength material bonded together into beam form so that the beam is lightweight, and has high tensile strength to carry the blade centrifugal loads, low shear modulus to permit torsional twisting thereof for turbine speed control purposes, and adequate bending stiffness to permit out-of-plane deflection thereof for turbine yard control purposes. A selectively off-set weighted pendulum member is pivotally connected to the turbine and connected to the beam or blade so as to cause torsional twisting thereof in response to centrifugal loading of the pendulum member for turbine speed control purposes.

Cheney, Jr., Marvin Chapin (Glastonbury, CT); Spierings, Petrus A. M. (Middletown, CT)

1978-01-01T23:59:59.000Z

77

140 IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY, VOL. 9, NO. 1, JANUARY 2001 Fuzzy Damage-Mitigating Control of a Fossil Power  

E-Print Network (OSTI)

these are nonstandard automatic control procedures suchas using attemperating sprays to generate steam

Ray, Asok

78

Automatic coolant flow control device for a nuclear reactor assembly  

DOE Patents (OSTI)

A device which controls coolant flow through a nuclear reactor assembly comprises a baffle means at the exit end of said assembly having a plurality of orifices, and a bimetallic member in operative relation to the baffle means such that at increased temperatures said bimetallic member deforms to unblock some of said orifices and allow increased coolant flow therethrough.

Hutter, E.

1984-01-27T23:59:59.000Z

79

Automatic coolant flow control device for a nuclear reactor assembly  

DOE Patents (OSTI)

A device which controls coolant flow through a nuclear reactor assembly comprises a baffle means at the exit end of said assembly having a plurality of orifices, and a bimetallic member in operative relation to the baffle means such that at increased temperatures said bimetallic member deforms to unblock some of said orifices and allow increased coolant flow therethrough.

Hutter, Ernest (Wilmette, IL)

1986-01-01T23:59:59.000Z

80

Automatic IEEE 802.11 rate control for streaming applications  

E-Print Network (OSTI)

Streaming multimedia content in real-time over a wireless link is a challenging task because of the rapid fluctuations in link conditions that can occur due to movement, interference, and so on. The popular IEEE 802.11 standard includes low-level tuning parameters like the transmission rate. Standard device drivers for today’s wireless products are based on gathering statistics, and consequently, adapt rather slowly to changes in conditions. To meet the strict latency requirements of streaming applications, we designed and implemented an advanced hybrid control algorithm that uses signal-strength (SNR) information to achieve fast responses. Since SNR readings are quite noisy we do not use that information to directly control the rate setting, but rather as a safeguard limiting the range of feasible settings to choose from. We report on real-time experiments involving two laptops equipped with IEEE 802.11a wireless interface cards. The results show that using SNR information greatly enhances responsiveness in comparison to statistics-based rate controllers. Finally, we will present the results of an experiment with realtime video streaming to a moving laptop in an office-like environment. Our hybrid control algorithm effectively prevented many packets losses, thereby achieving a much higher video quality than 1 the statistics based algorithm.

Ivaylo Haratcherev; Jacco Taal; Koen Langendoen; Reginald Lagendijk; Henk Sips

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

A field demonstration of automatic restroom ventilation control to reduce energy consumption  

SciTech Connect

This report documents the motion sensor evaluation task for the Hanford Energy Management Committee (HEMC) performed by Pacific Northwest Laboratory (PNL) to support the energy reduction mission. The study included installing automatic exhaust ventilation controls in the restrooms of the 1103 Building, 100N area. The goal of this task was to measure the benefit of automatically controlling exhaust ventilation in restrooms of an office building on the Hanford Site. The HEMC belief is that the value of controlling the fans is not limited to the power consumed by the fans, but also includes the value invested to condition (heat or cool) the makeup air. The air exhausted to the exterior of the building must ultimately be replaced by unconditioned air from the outside. This outside air must then by conditioned to maintain the comfort of building occupants. 6 figs., 1 tab.

Doggett, W.H.; Merrick, S.B.; Richman, E.E.

1989-09-01T23:59:59.000Z

82

Relaying and Controls for Generator Applications  

E-Print Network (OSTI)

In today's competitive marketplace, many electrical energy consumers are encouraged to enter into interruptible or cogeneration contracts by their electrical utility. Interruptible contracts provide year-round cost savings for the consumer, and defer costly infrastructure expansion for the utility. In some cases, existing generators and controls can be upgraded or modified for paralleling with the utility. In new installations, there are literally dozens of options available for generator operation. This paper provides an overview of generators, relaying and controls. Typical operational procedures are discussed to provide a framework for optimizing generator performance. Additionally, methods of providing electrical protection and control for generators are discussed for small and large generator applications at low and medium voltages. Note: The views expressed in this paper do not necessarily represent the views of the United States of America, the U. S. Department of Justice, or the Federal Bureau of Prisons.

Massey, G. W.

2000-04-01T23:59:59.000Z

83

Neural block control for synchronous generators  

Science Conference Proceedings (OSTI)

In this paper, a novel approach to control a single generator, connected to an infinite bus, is presented. Modifying published results for nonlinear identification using recurrent neural networks, a block controllable neural identifier is proposed, based ... Keywords: Adaptive control, Electro-mechanical systems, Gray-box modeling, Neural networks, Power-energy

Ramon A. Felix; Edgar N. Sanchez; Alexander G. Loukianov

2009-12-01T23:59:59.000Z

84

Service- and energy-related optimization of advanced automatic train control  

DOE Green Energy (OSTI)

The Bay Area Rapid Transit (BART) system, in collaboration with Hughes Aircraft Company and Harmon Industries, is in the process of developing an Advanced Automatic Train Control (AATC) system to replace the current fixed-block automatic system. As in the current ATC system, the trains will be controlled by station computers at the wayside; however, spread-spectrum radios rather than track-circuits will be employed to determine train locations and reliably transfer control information, allowing for finer speed and acceleration control, as well as more precise train locating capabilities and moving-block control. The authors have developed a simulator of the train control and power consumption of the AATC system, and are now employing this tool to develop enhanced train control algorithms to supplement the safety-critical controller. These algorithms do not attempt to globally optimize the control system with respect to a cost function, but rather they modify the baseline vital control to smooth the train trajectories, and to reduce energy consumption and power infrastructure requirements, through coordination of multiple trains. Several control algorithms are under development, including (1) delay recovery, which smoothly and efficiently controls trains approaching and stopped behind a delayed train, (2) interference management, which controls closely-following trains to avoid oscillatory brake/acceleration cycles, and (3) low voltage avoidance, which limits power consumption by multiple trains in an area to prevent low voltage events. The authors discuss progress to date on development of these control algorithms, as well as their service- and energy-related benefits.

Gordon, S.P. [Sandia National Labs., Livermore, CA (United States); Lehrer, D.G. [Bay Area Rapid Transit District, Oakland, CA (United States)

1998-05-01T23:59:59.000Z

85

Analysis and synthesis of logical-dynamic systems of automatic control of a gas-turbine engine  

Science Conference Proceedings (OSTI)

Specific features of analysis and synthesis of logical-dynamic automatic control systems with algebraic selectors for gas-turbine engines are considered. Equivalent nonlinear structures of these systems are obtained. Methods for providing stability, ...

V. I. Petunin; A. I. Frid

2012-11-01T23:59:59.000Z

86

PGPG: An Automatic Generator of Pipeline Design for Programmable GRAPE Systems  

E-Print Network (OSTI)

We have developed PGPG (Pipeline Generator for Programmable GRAPE), a software which generates the low-level design of the pipeline processor and communication software for FPGA-based computing engines (FBCEs). An FBCE typically consists of one or multiple FPGA (Field-Programmable Gate Array) chips and local memory. Here, the term "Field-Programmable" means that one can rewrite the logic implemented to the chip after the hardware is completed, and therefore a single FBCE can be used for calculation of various functions, for example pipeline processors for gravity, SPH interaction, or image processing. The main problem with FBCEs is that the user need to develop the detailed hardware design for the processor to be implemented to FPGA chips. In addition, she or he has to write the control logic for the processor, communication and data conversion library on the host processor, and application program which uses the developed processor. These require detailed knowledge of hardware design, a hardware description language such as VHDL, the operating system and the application, and amount of human work is huge. A relatively simple design would require 1 person-year or more. The PGPG software generates all necessary design descriptions, except for the application software itself, from a high-level design description of the pipeline processor in the PGPG language. The PGPG language is a simple language, specialized to the description of pipeline processors. Thus, the design of pipeline processor in PGPG language is much easier than the traditional design. For real applications such as the pipeline for gravitational interaction, the pipeline processor generated by PGPG achieved the performance similar to that of hand-written code. In this paper we present a detailed description of PGPG version 1.0.

Tsuyoshi Hamada; Toshiyuki Fukushige; Junichiro Makino

2007-03-08T23:59:59.000Z

87

Optimal generation of entanglement under local control  

E-Print Network (OSTI)

We study the optimal generation of entanglement between two qubits subject to local unitary control. With the only assumptions of linear control and unitary dynamics, by means of a numerical protocol based on the variational approach (Pontryagin's Minimum Principle), we evaluate the optimal control strategy leading to the maximal achievable entanglement in an arbitrary interaction time, taking into account the energy cost associated to the controls. In our model we can arbitrarily choose the relative weight between a large entanglement and a small energy cost.

Raffaele Romano; Alessio Del Fabbro

2007-07-11T23:59:59.000Z

88

Optimal generation of entanglement under local control  

E-Print Network (OSTI)

We study the optimal generation of entanglement between two qubits subject to local unitary control. With the only assumptions of linear control and unitary dynamics, by means of a numerical protocol based on the variational approach (Pontryagin's Minimum Principle), we evaluate the optimal control strategy leading to the maximal achievable entanglement in an arbitrary interaction time, taking into account the energy cost associated to the controls. In our model we can arbitrarily choose the relative weight between a large entanglement and a small energy cost.

Romano, Raffaele

2007-01-01T23:59:59.000Z

89

A Novel Approach for Automatic Control of Piezoelectric Elements Used for Lorentz Force Detuning Compensation  

E-Print Network (OSTI)

Abstract: Linear accelerators such as Free Electron Lasers (FELs) use superconducting (SC) resonant cavities to accelerate electron beam to high energies. TESLA type resonators are extremely sensitive to detuning induced by mechanical deformations – Lorentz force detuning (LFD), mainly due to the extremely high quality factor (Q) of the 1.3 GHz resonance mode, in the range of 1e6. The resulting modulation of a resonance frequency of the cavity makes power consumption and stability performances of the Low-Latency Radio Frequency (LLRF) control more critical. In order to minimize the RF control efforts and desired stabilities, the fast piezoelectric actuators with digital control systems are commonly used. The paper presents a novel approach for automatic control of piezoelectric actuators used for compensation of Lorentz force detuning, the practical application and carried out tests in accelerating module ACC6 in Free-Electron Laser in Hamburg (FLASH).

Przygoda, K; Napieralski, A; Grecki, M

2010-01-01T23:59:59.000Z

90

Self-powered automatic secondary air controllers for woodstoves and small furnaces  

DOE Patents (OSTI)

A controller for automatically regulating the supply of secondary combustion air to woodstoves and small furnaces. The controller includes a movable air valve for controlling the amount of secondary air admitted into the chamber. A self powered means monitors the concentration of combustible gases and vapors and actuates the movable air valve to increase the supply of secondary air in response to increasing concentrations of the combustible gases and vapors. The self-powered means can be two fluid filled sensor bulbs, one of which has a coating of a combustion catalyst. Alternatively, the self powered means can be two metallic stripes laminated together, one of which is coated with a combustion catalyst, and when heated, causes the air valve to actuate.

Siemer, Darryl D. (Idaho Falls, ID)

1991-01-01T23:59:59.000Z

91

High-Level Specification and Automatic Generation of IP Interface Monitors  

E-Print Network (OSTI)

A central problem in functional verification is to check that a circuit block is producing correct outputs while enforcing that the environment is providing legal inputs. To attack this problem, several researchers have proposed monitor-based methodologies, which offer many benefits. This paper presents a novel, high-level specification style for these monitors, along with a linear-size, linear-time translation algorithm into monitor circuits. The specification style naturally fits the complex, but well-specified interfaces used between IP blocks in systems-on-chip. To demonstrate the advantage of our specification style, we have specified monitors for various versions of the Sonics OCP protocol as well as the AMBA AHB protocol, and have developed a prototype tool that automatically translates specifications into Verilog or VHDL monitor circuits.

Marcio T. Oliveira; Alan J. Hu

2002-01-01T23:59:59.000Z

92

INTEGRATED CONTROL OF NEXT GENERATION POWER SYSTEM  

Science Conference Proceedings (OSTI)

Control methodologies provide the necessary data acquisition, analysis and corrective actions needed to maintain the state of an electric power system within acceptable operating limits. These methods are primarily software-based algorithms that are nonfunctional unless properly integrated with system data and the appropriate control devices. Components of the control of power systems today include protective relays, supervisory control and data acquisition (SCADA), distribution automation (DA), feeder automation, software agents, sensors, control devices and communications. Necessary corrective actions are still accomplished using large electromechanical devices such as vacuum, oil and gas-insulated breakers, capacitor banks, regulators, transformer tap changers, reclosers, generators, and more recently FACTS (flexible AC transmission system) devices. The recent evolution of multi-agent system (MAS) technologies has been reviewed and effort made to integrate MAS into next generation power systems. A MAS can be defined as ��a loosely-coupled network of problem solvers that work together to solve problems that are beyond their individual capabilities��. These problem solvers, often called agents, are autonomous and may be heterogeneous in nature. This project has shown that a MAS has significant advantages over a single, monolithic, centralized problem solver for next generation power systems. Various communication media are being used in the electric power system today, including copper, optical fiber and power line carrier (PLC) as well as wireless technologies. These technologies have enabled the deployment of substation automation (SA) at many facilities. Recently, carrier and wireless technologies have been developed and demonstrated on a pilot basis. Hence, efforts have been made by this project to penetrate these communication technologies as an infrastructure for next generation power systems. This project has thus pursued efforts to use specific MAS methods as well as pertinent communications protocols to imbed and assess such technologies in a real electric power distribution system, specifically the Circuit of the Future (CoF) developed by Southern California Edison (SCE). By modeling the behavior and communication for the components of a MAS, the operation and control of the power distribution circuit have been enhanced. The use of MAS to model and integrate a power distribution circuit offers a significantly different approach to the design of next generation power systems. For example, ways to control a power distribution circuit that includes a micro-grid while considering the impacts of thermal constraints, and integrating voltage control and renewable energy sources on the main power system have been pursued. Both computer simulations and laboratory testbeds have been used to demonstrate such technologies in electric power distribution systems. An economic assessment of MAS in electric power systems was also performed during this project. A report on the economic feasibility of MAS for electric power systems was prepared, and particularly discusses the feasibility of incorporating MAS in transmission and distribution (T&D) systems. Also, the commercial viability of deploying MAS in T&D systems has been assessed by developing an initial case study using utility input to estimate the benefits of deploying MAS. In summary, the MAS approach, which had previously been investigated with good success by APERC for naval shipboard applications, has now been applied with promising results for enhancing an electric power distribution circuit, such as the Circuit of the Future developed by Southern California Edison. The results for next generation power systems include better ability to reconfigure circuits, improve protection and enhance reliability.

None

2010-02-28T23:59:59.000Z

93

Object-oriented pattern-based parallel programming with automatically generated frameworks  

Science Conference Proceedings (OSTI)

The CO2P3S parallel programming system uses design patterns and object-oriented programming to reduce the complexities of parallel programming. The system generates correct frameworks from pattern template specifications and provides ...

Steve MacDonald; Duane Szafron; Jonathan Schaeffer

1999-05-01T23:59:59.000Z

94

Apparatus for generating a robotic plan for automatically assembling a mechanical component  

DOE Patents (OSTI)

This invention is comprised of an apparatus operable in combination with a robot positioned in a workcell having a preselected specification is operable to generate a program for operating the robot to assemble a mechanical component. The apparatus includes a planner for receiving as inputs a CAD model of the mechanical component to be assembled, a set of robot primitives and a set of mechanical component assembly rules for determining the conditions under which the set of robot primitives apply. The planner generates from these inputs a general, workcell specification-independent plan for assembling the mechanical component. The general plan generated by the planner is provided as an input to a compiler along with details relating to the workcell specification, and the compiler generates from these inputs a workcell specification-dependent program which operates the robot to assemble the mechanical component.

Maciejewski, A.A.; Strip, D.R.

1991-12-31T23:59:59.000Z

95

DC Motor control using motor-generator set with controlled generator field  

DOE Patents (OSTI)

A d.c. generator is connected in series opposed to the polarity of a d.c. power source supplying a d.c. drive motor. The generator is part of a motor-generator set, the motor of which is supplied from the power source connected to the motor. A generator field control means varies the field produced by at least one of the generator windings in order to change the effective voltage output. When the generator voltage is exactly equal to the d.c. voltage supply, no voltage is applied across the drive motor. As the field of the generator is reduced, the drive motor is supplied greater voltage until the full voltage of the d.c. power source is supplied when the generator has zero field applied. Additional voltage may be applied across the drive motor by reversing and increasing the reversed field on the generator. The drive motor may be reversed in direction from standstill by increasing the generator field so that a reverse voltage is applied across the d.c. motor.

Belsterling, Charles A. (Norristown, PA); Stone, John (Medford, NJ)

1982-01-01T23:59:59.000Z

96

Random Table and Its Ground Truth Automatic Generation: A Tool for Table  

E-Print Network (OSTI)

We developed a software tool to assist table understanding research. It can analyze any given table ground truth and generate documents that include similar table elements while have more variety on both table and non-table parts. Based on our novel content matching ground truthing idea, the table ground truth data for the generated table elements become available with little manual work. The validity of the proposed strategy was confirmed by our table detection algorithm development. We made this software package publicly available.

Understanding Research Yalin; Yalin Wang

2001-01-01T23:59:59.000Z

97

AUTOMATIC GENERATION OF DIGITAL BUILDING MODELS FOR COMPLEX STRUCTURES FROM LIDAR DATA  

E-Print Network (OSTI)

Automated and reliable 3D reconstruction of man-made structures is important for various applications in virtual reality, city modeling, military training, etc. This paper is concerned with the automated generation of Digital Building Models (DBM) associated with complex structures comprised of small parts with different slopes, sizes, and shapes, from a LiDAR point cloud. The proposed methodology consists of a sequence of four steps: ground/non-ground point separation; building hypothesis generation; segmentation of planar patches and intermediate boundary generation; and boundary refinement and 3D wire frame generation. First, a novel ground/non-ground point classification technique is proposed based on the visibility analysis among ground and non-ground points in a synthesized perspective view. Once the LiDAR point cloud has been classified into ground and non-ground points, the non-ground points are analyzed and used to generate hypotheses of building instances based on the point attributes and the spatial relationships among the points. The third step of the proposed methodology segments each building hypothesis into a group of planar patches while simultaneously considering the attribute similarity and the spatial proximity among the points. The intermediate boundaries for segmented clusters are produced by using a modified convex hull algorithm. These boundaries are used as initial approximations of the planar surfaces comprising the building model of a given hypothesis. The last step of the proposed methodology utilizes these initial boundaries to come up with a refined set of boundaries, which are connected to produce a wire frame representing the DBM. The performance of the proposed methodology has been evaluated using experimental results from real data.

Changjae Kim; Ayman Habib; Yu-chuan Chang

2008-01-01T23:59:59.000Z

98

Wind Turbine Generator Condition Monitoring via the Generator Control Loop.  

E-Print Network (OSTI)

??This thesis focuses on the development of condition monitoring techniques for application in wind turbines, particularly for offshore wind turbine driven doubly fed induction generators.… (more)

ZAGGOUT, MAHMOUD,NOUH

2013-01-01T23:59:59.000Z

99

Variable Renewable Generation Can Provide Balancing Control to...  

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

Variable Renewable Generation Can Provide Balancing Control to the Electric Power System e Active Power Control Helps Maintain System Frequency As wind and solar plants become more...

100

Variable Renewable Generation can Provide Balancing Control to the Electric Power System (Fact Sheet)  

DOE Green Energy (OSTI)

As wind and solar plants become more common in the electric power system, they may be called on to provide grid support services to help maintain system reliability. For example, through the use of inertial response, primary frequency response, and automatic generation control (also called secondary frequency response), wind power can provide assistance in balancing the generation and load on the system. These active power (i.e., real power) control services have the potential to assist the electric power system in times of disturbances and during normal conditions while also potentially providing economic value to consumers and variable renewable generation owners. This one-page, two-sided fact sheet discusses the grid-friendly support and benefits renewables can provide to the electric power system.

Not Available

2013-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

Published in proceedings of the 1996 EUROSIM Int'l Conf., June 10--12, 1996, Delft, The Netherlands, pp. 421--428. Automatic Code Generation for High Performance Computing in  

E-Print Network (OSTI)

, The Netherlands, pp. 421--428. Automatic Code Generation for High Performance Computing in Environmental Modeling Robert van Engelen a#+ , Lex Wolters a+# , and Gerard Cats b# a High Performance Computing Division, Dept: cats@knmi.nl In this paper we will discuss automatic code generation for high performance computer

van Engelen, Robert A.

102

Advanced NOx Emissions Control: Control Technology - Second Generation  

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

Second Generation Advanced Reburning Second Generation Advanced Reburning General Electric - Energy and Environmental Research Corporation (GE-EER) is carrying out a two Phase research program to develop novel Advanced Reburning (AR) concepts for high efficiency and low cost NOx control from coal-fired utility boilers. AR technologies are based on combination of basic reburning and N-agent/promoter injections. Phase I of the project was successfully completed and EER was selected to continue to develop AR technology during Phase II. Phase I demonstrated that AR technologies are able to provide effective NOx control for coal-fired combustors. Three technologies were originally envisioned for development: AR-Lean, AR-Rich, and Multiple Injection AR (MIAR). Along with these, three additional technologies were identified during the project: reburning plus promoted SNCR; AR-Lean plus promoted SNCR; and AR-Rich plus promoted SNCR. The promoters are sodium salts, in particular sodium carbonate. These AR technologies have different optimum reburn heat input levels and furnace temperature requirements. For full scale application, an optimum technology can be selected on a boiler-specific basis depending on furnace temperature profile and regions of injector access.

103

Advanced NOx Emissions Control: Control Technology - Second Generation  

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

In Situ Device for Real-Time Catalyst Deactivation Measurements in Full-Scale SCR Systems In Situ Device for Real-Time Catalyst Deactivation Measurements in Full-Scale SCR Systems To support trends in the electric generating industry of moving from seasonal to year-round operation of Selective Catalytic Reduction (SCR) for control of NOx and mercury, as well as extending the time between generating unit outages, Fossil Energy Research Corporation (FERCo) is developing technology to determine SCR catalyst activity and remaining life without requiring an outage to obtain and analyze catalyst samples. FERCo intends to use SCR catalyst performance results measured with their in situ device at Alabama Power’s Plant Gorgas during the 2005 and 2006 ozone seasons, along with EPRI’s CatReactTM catalyst management software, to demonstrate the value of real-time activity measurements with respect to the optimization of catalyst replacement strategy. Southern Company and the Electric Power Research Institute are co-funding the project.

104

BATTERY STORAGE CONTROL FOR STEADYING RENEWABLE POWER GENERATION  

E-Print Network (OSTI)

BATTERY STORAGE CONTROL FOR STEADYING RENEWABLE POWER GENERATION By Shengyuan (Mike) Chen, Emilie-626-7370 URL: http://www.ima.umn.edu #12;Battery Storage Control for Steadying Renewable Power Generation by storing excess power to a battery during excess generation, and then releasing the energy when power

105

Controllable procedural map generation via multiobjective evolution  

Science Conference Proceedings (OSTI)

This paper shows how multiobjective evolutionary algorithms can be used to procedurally generate complete and playable maps for real-time strategy (RTS) games. We devise heuristic objective functions that measure properties of maps that impact important ... Keywords: Evolutionary computation, Multiobjective optimisation, Procedural content generation, RTS, Real-time strategy games, StarCraft

Julian Togelius; Mike Preuss; Nicola Beume; Simon Wessing; Johan Hagelbäck; Georgios N. Yannakakis; Corrado Grappiolo

2013-06-01T23:59:59.000Z

106

Power and Voltage Smooth Control of Doubly Fed Induction Generator  

Science Conference Proceedings (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

107

Natural circulation steam generator model for optimal steam generator water level control  

SciTech Connect

Several authors have cited the control of steam generator water level as an important problem in the operation of pressurized water reactor plants. In this paper problems associated with steam generator water level control are identified, and advantages of modern estimation and control theory in dealing with these problems are discussed. A new state variable steam generator model and preliminary verification results using data from the loss of fluid test (LOFT) plant are also presented.

Feeley, J.J.

1979-06-01T23:59:59.000Z

108

Resilient Control Systems: Next Generation Design Research  

Science Conference Proceedings (OSTI)

Since digital control systems were introduced to the market more than 30 years ago, the operational efficiency and stability gained through their use have fueled our migration and ultimate dependence on them for the monitoring and control of critical infrastructure. While these systems have been designed for functionality and reliability, a hostile cyber environment and uncertainties in complex networks and human interactions have placed additional parameters on the design expectations for control systems.

Craig Rieger

2009-05-01T23:59:59.000Z

109

Control Strategies for the Next Generation Microgrids.  

E-Print Network (OSTI)

??In the context of the envisioned electric power delivery system of the future, the smart grid, this dissertation focuses on control and management strategies for… (more)

Ali, Mehrizi-Sani

2012-01-01T23:59:59.000Z

110

Solar powered automatic turn-on control (spa-toc) unit and method  

SciTech Connect

Orderly control of power applied by a photovoltaic solar panel d.c. source to a load is attained despite varying long and short term solar conditions by coupling power from the panel to an inverter in response to the panel voltage exceeding a predetermined level and preventing coupling of power from the panel to the inverter in response to the panel voltage being less than a predetermined level. The switching frequency of the inverter is controlled in response to the panel voltage so that approximately maximum power which the panel is capable of generating is supplied to the inverter for the incident solar energy on the panel at a given temperature. Power is supplied to the inverter by a series switch between the panel and inverter. The switch is activated into a conducting state in response to the panel voltage exceeding a predetermined value. The panel voltage controls the turn-on and turn-off levels of the series switch by a hysteresis effect, provided by connecting a dummy power dissipating load in shunt with the panel while the series switch is cut off. The dummy load has a value causing the panel output voltage to be less than the voltage for maximum panel output power. A similar series switch and hysteresis control is provided for control circuitry for the inverter. The series switch for supplying power to the control circuitry can be activated in response to the same voltage which activates the series switch for the inverter, or in response to a different voltage level.

Baker, R.H.

1982-06-01T23:59:59.000Z

111

A learning control of unused energy power generation  

Science Conference Proceedings (OSTI)

In recent years, the development of new clean energy without dependence on fossil fuel has become urgent. This article proposes a learning control system for power generation using a low-temperature gap which has been designed to maintain the speed of ... Keywords: BP neural network, Evaporator, Learning control, Low thermal gap, Power generator, Turbine

Satomi Shikasho; Kun-Young Han; Ji-Sun Shin; Chui Chengyou; Hee-Hyol Lee

2010-12-01T23:59:59.000Z

112

Control of Doubly-Fed Induction Generator System Using PIDNNs  

Science Conference Proceedings (OSTI)

An intelligent control stand-alone doubly-fed induction generator (DFIG) system using proportional-integral-derivative neural network (PIDNN) is proposed in this study. This system can be applied as a stand-alone power supply system or as the emergency ... Keywords: Doubly-fed induction generator, field-oriented control, proportional-integral-derivative neural network

Faa-Jeng Lin; Jonq-Chin Hwang; Kuang-Hsiung Tan; Zong-Han Lu; Yung-Ruei Chang

2010-12-01T23:59:59.000Z

113

Advanced Voltage Control Strategies for High Penetration of Distributed Generation  

Science Conference Proceedings (OSTI)

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

2010-12-31T23:59:59.000Z

114

Thermoelectric generator cooling system and method of control  

DOE Patents (OSTI)

An apparatus is provided that includes a thermoelectric generator and an exhaust gas system operatively connected to the thermoelectric generator to heat a portion of the thermoelectric generator with exhaust gas flow through the thermoelectric generator. A coolant system is operatively connected to the thermoelectric generator to cool another portion of the thermoelectric generator with coolant flow through the thermoelectric generator. At least one valve is controllable to cause the coolant flow through the thermoelectric generator in a direction that opposes a direction of the exhaust gas flow under a first set of operating conditions and to cause the coolant flow through the thermoelectric generator in the direction of exhaust gas flow under a second set of operating conditions.

Prior, Gregory P; Meisner, Gregory P; Glassford, Daniel B

2012-10-16T23:59:59.000Z

115

Development of Adaptive Signal Control (ASC) Based on Automatic Vehicle Location (AVL) System and Its Applications  

E-Print Network (OSTI)

into Flexible Traffic Control Systems, TRB State-of-the-artTraffic Signal Control System: Architecture, Algorithms, andlength for urban traffic control systems. Proceedings of the

Wu, Guoyuan

2010-01-01T23:59:59.000Z

116

Security of jump controlled sequence generators for stream ciphers  

Science Conference Proceedings (OSTI)

The use of jump control technique provides efficient and secure ways for generating key-stream for stream ciphers. This design approach was recently implemented in some algorithms submitted to eSTREAM, the ECRYPT Stream Cipher Project. However, inappropriately ... Keywords: Pomaranch, cryptanalysis, jump register, key-stream generator, linear relations, stream cipher

Tor Helleseth; Cees J. A. Jansen; Shahram Khazaei; Alexander Kholosha

2006-09-01T23:59:59.000Z

117

Functional Requirements of Next Generation Control Center Applications  

Science Conference Proceedings (OSTI)

Future electric grids will operate in an environment where there are increasing renewables, demand responses, and storage with aging infrastructures. Next generation control centers (NGCC) need enhanced and new monitoring, analysis, and control functions to help operators improve efficient, reliable, and low-carbon operation of the grid. This report reviews the status and trends in the integration of renewable generation, demand responses, and storage systems, and recommends requirements for NGCC functio...

2011-06-15T23:59:59.000Z

118

Power and Frequency Control as it Relates to Wind-Powered Generation  

E-Print Network (OSTI)

amount of wind power generation that can be accommodated.ramping of generation Power and Frequency Control as itfrequency to loss of generation Power and Frequency Control

Lacommare, Kristina S H

2011-01-01T23:59:59.000Z

119

CMOS implementation of a 1.6 GHz low voltage low phase noise quadrature output frequency synthesizer with automatic amplitude control  

Science Conference Proceedings (OSTI)

This article presents the design of a 1.2 V CMOS low phase noise quadrature output frequency synthesizer (FS) to be used for a GPS tuner application. Special reference is made to the design of a wide tuning range quadrature output voltage-controlled ... Keywords: AM-to-PM up-conversion, Automatic amplitude control, DC---DC Converter, Phase noise, Quadrature VCO

Owen Casha; Ivan Grech; Joseph Micallef; Edward Gatt

2008-04-01T23:59:59.000Z

120

Maximum power tracking control scheme for wind generator systems  

E-Print Network (OSTI)

The purpose of this work is to develop a maximum power tracking control strategy for variable speed wind turbine systems. Modern wind turbine control systems are slow, and they depend on the design parameters of the turbine and use wind and/or rotor speed measurements as control variable inputs. The dependence on the accuracy of the measurement devices makes the controller less reliable. The proposed control scheme is based on the stiff system concept and provides a fast response and a dynamic solution to the complicated aerodynamic system. This control scheme provides a response to the wind changes without the knowledge of wind speed and turbine parameters. The system consists of a permanent magnet synchronous machine (PMSM), a passive rectifier, a dc/dc boost converter, a current controlled voltage source inverter, and a microcontroller that commands the dc/dc converter to control the generator for maximum power extraction. The microcontroller will also be able to control the current output of the three-phase inverter. In this work, the aerodynamic characteristics of wind turbines and the power conversion system topology are explained. The maximum power tracking control algorithm with a variable step estimator is introduced and the modeling and simulation of the wind turbine generator system using the MATLAB/SIMULINK® software is presented and its results show, at least in principle, that the maximum power tracking algorithm developed is suitable for wind turbine generation systems.

Mena Lopez, Hugo Eduardo

2007-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

Nuclear Maintenance Applications Center: Emergency Diesel Generator Control Systems  

Science Conference Proceedings (OSTI)

Emergency diesel generators (EDGs) have been a subject of industry attention since the 1980s because of their importance to plant safety, and a key point of focus has been their control systems. To support long-term reliability and availability of EDG control systems, the Electric Power Research Institute (EPRI) has developed this report, which highlights maintenance tasks and strategies that can reduce failures of control system components. The report draws from the knowledge of industry EDG experts and...

2012-08-06T23:59:59.000Z

122

Emergency Diesel Generator Digital Control System Upgrade Requirements  

Science Conference Proceedings (OSTI)

This interim report documents the development of system requirements for a digital control system upgrade to the station emergency diesel generators (EDGs). Operators of nuclear power plants (NPPs) must be able to replace and upgrade equipment in a cost-effective manner while continuing to meet safety and reliability requirements and controlling modification costs. Upgrades to plant equipment—especially instrumentation and control (I&C) systems—typically involve replacement of analog ...

2013-12-18T23:59:59.000Z

123

A Step Towards Automatic Documentation  

E-Print Network (OSTI)

This paper describes a system which automatically generates program documentation. Starting with a plan generated by analyzing the program, the system computes several kinds of summary information about the program. The ...

Frank, Claude

124

CERTIFICATE OF ACCEPTANCE LTG-3A Automatic Daylighting Control Acceptance Document (Page 1 of 1)  

E-Print Network (OSTI)

for buildings with > 5 daylight control systems, sample group glazing must be the same orientation) Control-meter or amp-meter measurement Applicable Control SystemComplete all tests on pages 5 & 6 (No Daylight Test, Full Daylight Test, and Partial Daylight Test) and fill out Pass/Fail section on Page 6 A B C System

125

Next Generation Nuclear Plant Resilient Control System Functional Analysis  

SciTech Connect

Control Systems and their associated instrumentation must meet reliability, availability, maintainability, and resiliency criteria in order for high temperature gas-cooled reactors (HTGRs) to be economically competitive. Research, perhaps requiring several years, may be needed to develop control systems to support plant availability and resiliency. This report functionally analyzes the gaps between traditional and resilient control systems as applicable to HTGRs, which includes the Next Generation Nuclear Plant; defines resilient controls; assesses the current state of both traditional and resilient control systems; and documents the functional gaps existing between these two controls approaches as applicable to HTGRs. This report supports the development of an overall strategy for applying resilient controls to HTGRs by showing that control systems with adequate levels of resilience perform at higher levels, respond more quickly to disturbances, increase operational efficiency, and increase public protection.

Lynne M. Stevens

2010-07-01T23:59:59.000Z

126

Emission Control Options for Distributed Resource Generators: A White Paper  

Science Conference Proceedings (OSTI)

This report analyzes the performance and cost of conventional and emerging emission control technologies for distributed resource generators (combustion turbines, microturbines, and reciprocating engines). The performance is benchmarked against the proposed California Air Resources Board (CARB) small generator certification standards for 2007, the most stringent of several emissions certification standards adopted or being considered. The costs are provided as capital cost and cost of electricity for emi...

2005-03-23T23:59:59.000Z

127

Development of control system for automatic mechanical transmission of battery electric bus  

Science Conference Proceedings (OSTI)

Due to the advantages of high efficiency, zero emission and good drivability, the battery electric vehicles (BEVs) promise to be one of the best choices to replace the oil fueled vehicle. In this paper a solution for the development of a control system ... Keywords: AMT, battery electric vehicle, control system, layered architecture, modular design

Hong-bo Liu; Yu-long Lei; Yu Zhang; Xiao-lin Zhang; You-de Li

2011-09-01T23:59:59.000Z

128

Options for Control of Reactive Power by Distributed Photovoltaic Generators  

E-Print Network (OSTI)

High penetration levels of distributed photovoltaic(PV) generation on an electrical distribution circuit present several challenges and opportunities for distribution utilities. Rapidly varying irradiance conditions may cause voltage sags and swells that cannot be compensated by slowly responding utility equipment resulting in a degradation of power quality. Although not permitted under current standards for interconnection of distributed generation, fast-reacting, VAR-capable PV inverters may provide the necessary reactive power injection or consumption to maintain voltage regulation under difficult transient conditions. As side benefit, the control of reactive power injection at each PV inverter provides an opportunity and a new tool for distribution utilities to optimize the performance of distribution circuits, e.g. by minimizing thermal losses. We discuss and compare via simulation various design options for control systems to manage the reactive power generated by these inverters. An important design decision that weighs on the speed and quality of communication required is whether the control should be centralized or distributed (i.e. local). In general, we find that local control schemes are capable for maintaining voltage within acceptable bounds. We consider the benefits of choosing different local variables on which to control and how the control system can be continuously tuned between robust voltage control, suitable for daytime operation when circuit conditions can change rapidly, and loss minimization better suited for nighttime operation.

Petr Sulc; Konstantin Turitsyn; Scott Backhaus; Michael Chertkov

2010-08-04T23:59:59.000Z

129

Automatic lighting controls demonstration: Long-term results. Final report, July 1991  

SciTech Connect

An advanced electronically ballasted lighting control system was installed in a portion of an office building to measure the energy and demand savings. The lighting control system used an integrated lighting control scenario that included daylight following, lumen depreciation correction, and scheduling. The system reduced lighting energy on weekdays by 62% and 51% in the north and south daylit zones, respectively, compared to a reference zone that did not have controls. During the summer, over 75% energy savings were achieved on weekdays in the north daylit zone. Even in the south interior zone, which benefitted lime from daylight, correction strategies and adjustment of the aisleway lights to a low level resulted in energy use of only half that of the reference zone. Although, in general, the savings varied over the year due to changing daylight conditions, the energy reduction achieved with controls could be fit using a simple analytical model. Significant savings also occurred during core operating hours when it is more expensive to supply and use energy. Compared to the usage in the reference zone, energy reductions of 49%, 44%, and 62% were measured in the south daylight, south interior, and north daylight zones, respectively, during core operating hours throughout the year. Lighting energy usage on weekends decreased dramatically in the zones with controls, with the usage in the north daylit zone only 10% that of the reference zone. A simple survey developed to assess occupant response to the lighting control system showed that the occupants were satisfied with the light levels provided.

Rubinstein, F. [Lawrence Berkeley Lab., CA (United States)

1991-10-18T23:59:59.000Z

130

Use of Linear Predictive Control for a Solar Electric Generating System  

E-Print Network (OSTI)

that use parabolic troughs in order to produce electricity from sunlight5 . The parabolic troughs are long, the temperature of the HTF leaving the parabolic trough collector is controlled by a skilled operator. He. Automatic control of the HTF in a parabolic trough collector through proportional control has been attempted

Wisconsin at Madison, University of

131

Local control of reactive power by distributed photovoltaic generators  

SciTech Connect

High penetration levels of distributed photovoltaic (PV) generation on an electrical distribution circuit may severely degrade power quality due to voltage sags and swells caused by rapidly varying PV generation during cloud transients coupled with the slow response of existing utility compensation and regulation equipment. Although not permitted under current standards for interconnection of distributed generation, fast-reacting, VAR-capable PV inverters may provide the necessary reactive power injection or consumption to maintain voltage regulation under difficult transient conditions. As side benefit, the control of reactive power injection at each PV inverter provides an opportunity and a new tool for distribution utilities to optimize the performance of distribution circuits, e.g. by minimizing thermal losses. We suggest a local control scheme that dispatches reactive power from each PV inverter based on local instantaneous measurements of the real and reactive components of the consumed power and the real power generated by the PVs. Using one adjustable parameter per circuit, we balance the requirements on power quality and desire to minimize thermal losses. Numerical analysis of two exemplary systems, with comparable total PV generation albeit a different spatial distribution, show how to adjust the optimization parameter depending on the goal. Overall, this local scheme shows excellent performance; it's capable of guaranteeing acceptable power quality and achieving significant saving in thermal losses in various situations even when the renewable generation in excess of the circuit own load, i.e. feeding power back to the higher-level system.

Chertkov, Michael [Los Alamos National Laboratory; Turitsyn, Konstantin [Los Alamos National Laboratory; Sulc, Petr [Los Alamos National Laboratory; Backhaus, Scott [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

132

Options for Control of Reactive Power by Distributed Photovoltaic Generators  

E-Print Network (OSTI)

High penetration levels of distributed photovoltaic(PV) generation on an electrical distribution circuit present several challenges and opportunities for distribution utilities. Rapidly varying irradiance conditions may cause voltage sags and swells that cannot be compensated by slowly responding utility equipment resulting in a degradation of power quality. Although not permitted under current standards for interconnection of distributed generation, fast-reacting, VAR-capable PV inverters may provide the necessary reactive power injection or consumption to maintain voltage regulation under difficult transient conditions. As side benefit, the control of reactive power injection at each PV inverter provides an opportunity and a new tool for distribution utilities to optimize the performance of distribution circuits, e.g. by minimizing thermal losses. We discuss and compare via simulation various design options for control systems to manage the reactive power generated by these inverters. An important design de...

Sulc, Petr; Backhaus, Scott; Chertkov, Michael

2010-01-01T23:59:59.000Z

133

Automatic Synthesis of Robust and Optimal Controllers An Industrial Case Study  

E-Print Network (OSTI)

containing oil and a fixed amount of gas in order to put the oil under pressure, and (4) a pump. When the pump to introduce additional oil in the accumulator (increasing the gas pressure). The control and is composed of: (1) a machine which consumes oil, (2) a reservoir containing oil, (3) an accumulator

Paris-Sud XI, Université de

134

International Conference on Machine Control & Guidance 2008 1 Automatic Guidance of Track Laying Machines with  

E-Print Network (OSTI)

laying machines, coordinate systems, error detection, work process driven data management, quality. Its outstanding result, the track management system Toporail, was developed under the operational lead on Machine Control & Guidance 2008 5 Figure 5: Maintenance process driven data management: Data updates

135

Autonomous monitoring of control hardware to predict off-normal conditions using NIF automatic Alignment Systems  

Science Conference Proceedings (OSTI)

The National Ignition Facility (NIF) is a high power laser system capable of supporting high-energy-density experimentation as a user facility for the next 30 years. In order to maximize the facility availability, preventive maintenance enhancements are being introduced into the system. An example of such an enhancement is a camera-based health monitoring system, integrated into the automated alignment system, which provides an opportunity to monitor trends in measurements such as average beam intensity, size of the beam, and pixel saturation. The monitoring system will generate alerts based on observed trends in measurements to allow scheduled pro-active maintenance before routine off-normal detection stops system operations requiring unscheduled intervention.

Awwal, A; Wilhelmsen, K; Leach, R; Kamm, V M; Burkhart, S; Lowe-Webb, R; Cohen, S

2011-07-20T23:59:59.000Z

136

Nonlinear power flow control applications to conventional generator swing equations subject to variable generation.  

Science Conference Proceedings (OSTI)

In this paper, the swing equations for renewable generators are formulated as a natural Hamiltonian system with externally applied non-conservative forces. A two-step process referred to as Hamiltonian Surface Shaping and Power Flow Control (HSSPFC) is used to analyze and design feedback controllers for the renewable generator system. This formulation extends previous results on the analytical verification of the Potential Energy Boundary Surface (PEBS) method to nonlinear control analysis and design and justifies the decomposition of the system into conservative and non-conservative systems to enable a two-step, serial analysis and design procedure. In particular, this approach extends the work done by developing a formulation which applies to a larger set of Hamiltonian Systems that has Nearly Hamiltonian Systems as a subset. The results of this research include the determination of the required performance of a proposed Flexible AC Transmission System (FACTS)/storage device to enable the maximum power output of a wind turbine while meeting the power system constraints on frequency and phase. The FACTS/storage device is required to operate as both a generator and load (energy storage) on the power system in this design. The Second Law of Thermodynamics is applied to the power flow equations to determine the stability boundaries (limit cycles) of the renewable generator system and enable design of feedback controllers that meet stability requirements while maximizing the power generation and flow to the load. Necessary and sufficient conditions for stability of renewable generators systems are determined based on the concepts of Hamiltonian systems, power flow, exergy (the maximum work that can be extracted from an energy flow) rate, and entropy rate.

Robinett, Rush D., III; Wilson, David Gerald

2010-05-01T23:59:59.000Z

137

Generating polarization controllable FELs at Dalian coherent light source  

E-Print Network (OSTI)

The property of the FEL polarization is of great importance to the user community. FEL pulses with ultra-high intensity and flexible polarization control ability will absolutely open up new scientific realms. In this paper, several polarization control approaches are presented to investigate the great potential on Dalian coherent light source, which is a government-approved novel FEL user facility with the capability of wavelength continuously tunable in the EUV regime of 50-150 nm. The numerical simulations show that both circularly polarized FELs with highly modulating frequency and 100 microjoule level pulse energy could be generated at Dalian coherent light source.

Zhang, T; Wang, D; Zhao, Z T; Zhang, W Q; Wu, G R; Dai, D X; Yang, X M

2013-01-01T23:59:59.000Z

138

1346 IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 46, NO. 9, SEPTEMBER 2001 Passive Velocity Field Control (PVFC)  

E-Print Network (OSTI)

, such that , and , is represented by the symmetric inertia matrix, with elements: We assume that defines the kinetic energy that the closed-loop control system is passive with respect to the supply rate . A skew-symmetric 2 tensor . The storage function in this case can be taken to be the kinetic energy . Notice that the component mechanical

Horowitz, Roberto

139

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 53, NO. 7, AUGUST 2008 1575 Adaptive Boundary Control for Unstable Parabolic  

E-Print Network (OSTI)

for Unstable Parabolic PDEs--Part I: Lyapunov Design Miroslav Krstic, Fellow, IEEE, and Andrey Smyshlyaev, Member, IEEE Abstract--We develop adaptive controllers for parabolic par- tial differential equations for parabolic PDEs con- trolled from a boundary and containing unknown destabilizing parameters affecting

Krstic, Miroslav

140

Automatic categorization of query results  

Science Conference Proceedings (OSTI)

Exploratory ad-hoc queries could return too many answers - a phenomenon commonly referred to as "information overload". In this paper, we propose to automatically categorize the results of SQL queries to address this problem. We dynamically generate ...

Kaushik Chakrabarti; Surajit Chaudhuri; Seung-won Hwang

2004-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

HTGR power plant turbine-generator load control system  

SciTech Connect

A control system is disclosed for a high temperature gas cooled reactor power plant, wherein a steam source derives heat from the reactor coolant gas to generate superheated and reheated steam in respective superheater and reheater sections that are included in the steam source. Each of dual turbine-generators includes a high pressure turbine to pass superheated steam and an associated intermediate low pressure turbine to pass reheated steam. A first admission valve means is connected to govern a flow of superheated steam through a high pressure turbine, and a second admission valve means is connected to govern a flow of reheated steam through an intermediate-low pressure turbine. A bypass line and bypass valve means connected therein are connected across a second admission valve means and its intermediate-low pressure turbine. The second admission valve means is positioned to govern the steam flow through the intermediate-low pressure turbine in accordance with the desired power output of the turbine-generator. In response to the steam flow through the intermediate-low pressure turbine, the bypass valve means is positioned to govern the steam flow through the bypass line to maintain a desired minimum flow through the reheater section at times when the steam flow through the intermediate-low pressure turbine is less than such minimum. The power output of the high pressure turbine is controlled by positioning the first admission valve means in predetermined proportionality with the desired power output of the turbine-generator, thereby improving the accuracy of control of the power output of the high pressure turbine at low load levels.

Braytenbah, A.S.; Jaegtnes, K.O.

1976-12-28T23:59:59.000Z

142

Battery control strategy Diesel generator Fuel consumption Hybrid system  

E-Print Network (OSTI)

Standalone diesel generators (DGs) are widely utilized in remote areas in Indonesia. Some areas use microhydro (MH) systems with DGs backup. However, highly diesel fuel price makes such systems become uneconomical. This paper introduces hybrid photovoltaic (PV)/MH/DG/battery systems with a battery control strategy to minimize the diesel fuel consumption. The method is applied to control the state of charge (SOC) level of the battery based on its previous level and the demand load condition to optimize the DG operation. Simulation results show that operations of the hybrid PV/MH/DG/battery with the battery control strategy needs less fuel consumption than PV/MH/DG and MH/DG systems.

Ayong Hiendro; Yohannes M. Simanjuntak

2012-01-01T23:59:59.000Z

143

Ab initio wavenumber accurate spectroscopy : {sup 1}CH{sub 2} and HCN vibrational levels on automatically generated IMLS potential energy surfaces.  

SciTech Connect

We report here calculated J = 0 vibrational frequencies for {sup 1}CH{sub 2} and HCN with root-mean-square error relative to available measurements of 2.0 cm{sup -1} and 3.2 cm{sup -1}, respectively. These results are obtained with DVR calculations with a dense grid on ab initio potential energy surfaces (PESs). The ab initio electronic structure calculations employed are Davidson-corrected MRCI calculations with double-, triple-, and quadruple-{zeta} basis sets extrapolated to the complete basis set (CBS) limit. In the {sup 1}CH{sub 2} case, Full CI tests of the Davidson correction at small basis set levels lead to a scaling of the correction with the bend angle that can be profitably applied at the CBS limit. Core-valence corrections are added derived from CCSD(T) calculations with and without frozen cores. Relativistic and non-Born-Oppenheimer corrections are available for HCN and were applied. CBS limit CCSD(T) and CASPT2 calculations with the same basis sets were also tried for HCN. The CCSD(T) results are noticeably less accurate than the MRCI results while the CASPT2 results are much poorer. The PESs were generated automatically using the local interpolative moving least-squares method (L-IMLS). A general triatomic code is described where the L-IMLS method is interfaced with several common electronic structure packages. All PESs were computed with this code running in parallel on eight processors. The L-IMLS method provides global and local fitting error measures important in automatically growing the PES from initial ab initio seed points. The reliability of this approach was tested for {sup 1}CH{sub 2} by comparing DVR-calculated vibrational levels on an L-IMLS ab initio surface with levels generated by an explicit ab initio calculation at each DVR grid point. For all levels ({approx}200) below 20000 cm{sup -1}, the mean unsigned difference between the levels of these two calculations was 0.1 cm{sup -1}, consistent with the L-IMLS estimated mean unsigned fitting error of 0.3 cm{sup -1}. All L-IMLS PESs used in this work have comparable mean unsigned fitting errors, implying that fitting errors have a negligible role in the final errors of the computed vibrational levels with experiment. Less than 500 ab initio calculations of the energy and gradients are required to achieve this level of accuracy.

Dawes, R.; Wagner, A. F.; Thompson, D. L.; Chemical Sciences and Engineering Division; Univ. of Missouri at Columbia

2009-04-23T23:59:59.000Z

144

Particle Swarm Optimization and Gradient Descent Methods for Optimization of PI Controller for AGC of Multi-area Thermal-Wind-Hydro Power Plants  

Science Conference Proceedings (OSTI)

The automatic generation control (AGC) of three unequal interconnected Thermal, Wind and Hydro power plant has been designed with PI controller. Further computational intelligent technique Particle Swarm Optimization and conventional Gradient Descent ... Keywords: Automatic generation control, Particle swarm optimization, Gradient Descent method, Generation rate constraint, Area control error, Wind energy conversion system

Naresh Kumari, A N. Jha

2013-04-01T23:59:59.000Z

145

Pitch-Controlled Variable-Speed Wind Turbine Generation  

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

Pitch-Controlled Variable-Speed Pitch-Controlled Variable-Speed Wind Turbine Generation February 2000 * NREL/CP-500-27143 E. Muljadi and C.P. Butterfield Presented at the 1999 IEEE Industry Applications Society Annual Meeting Phoenix, Arizona October 3-7, 1999 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute * * * * Battelle * * * * Bechtel Contract No. DE-AC36-99-GO10337 NOTICE The submitted manuscript has been offered by an employee of the Midwest Research Institute (MRI), a contractor of the US Government under Contract No. DE-AC36-99GO10337. Accordingly, the US Government and MRI retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes.

146

Second Generation Advanced Reburning for High Efficiency NOx Control  

SciTech Connect

This project is designed to develop a family of novel NO{sub x} control technologies, called Second Generation Advanced Reburning (SGAR) which has the potential to achieve 90+ NO{sub x} control in coal fired boilers at a significantly lower cost than Selective Catalytic Reduction. The ninth reporting period in Phase II (October 1-December 31, 1999) included preparation of the 10 x 10{sup 6} Btu/hr Tower Furnace for tests and setting the SGAR model to predict process performance under Tower Furnace conditions. Based on results of previous work, a paper has been prepared and submitted for the presentation at the 28 Symposium (International) on Combustion to be held at the University of Edinburgh, Scotland.

Vladimir M. Zamansky; Vitali V. Lissianski

1999-12-31T23:59:59.000Z

147

The Lightspeed Automatic . . .  

E-Print Network (OSTI)

We present an automated approach for high-quality preview of feature-film rendering during lighting design. Similar to previous work, we use a deep-framebuffer shaded on the GPU to achieve interactive performance. Our first contribution is to generate the deep-framebuffer and corresponding shaders automatically through data-flow analysis and compilation of the original scene. Cache compression reduces automatically-generated deep-framebuffers to reasonable size for complex production scenes and shaders. We also propose a new structure, the indirect framebuffer, that decouples shading samples from final pixels and allows a deep-framebuffer to handle antialiasing, motion blur and transparency efficiently. Progressive refinement enables fast feedback at coarser resolution. We demonstrate our approach in real-world production.

Jonathan Millard Ragan-Kelley

2007-01-01T23:59:59.000Z

148

AUTOMATIC COUNTER  

DOE Patents (OSTI)

An automatic counter of alpha particle tracks recorded by a sensitive emulsion of a photographic plate is described. The counter includes a source of mcdulated dark-field illumination for developing light flashes from the recorded particle tracks as the photographic plate is automatically scanned in narrow strips. Photoelectric means convert the light flashes to proportional current pulses for application to an electronic counting circuit. Photoelectric means are further provided for developing a phase reference signal from the photographic plate in such a manner that signals arising from particle tracks not parallel to the edge of the plate are out of phase with the reference signal. The counting circuit includes provision for rejecting the out-of-phase signals resulting from unoriented tracks as well as signals resulting from spurious marks on the plate such as scratches, dust or grain clumpings, etc. The output of the circuit is hence indicative only of the tracks that would be counted by a human operator.

Robinson, H.P.

1960-06-01T23:59:59.000Z

149

Computer controlled MHD power consolidation and pulse generation system  

DOE Green Energy (OSTI)

The major goal of this research project is to establish the feasibility of a power conversion technology which will permit the direct synthesis of computer programmable pulse power. Feasibility has been established in this project by demonstration of direct synthesis of commercial frequency power by means of computer control. The power input to the conversion system is assumed to be a Faraday connected MHD generator which may be viewed as a multi-terminal dc source and is simulated for the purpose of this demonstration by a set of dc power supplies. This consolidation/inversion (CI), process will be referred to subsequently as Pulse Amplitude Synthesis and Control (PASC). A secondary goal is to deliver a controller subsystem consisting of a computer, software, and computer interface board which can serve as one of the building blocks for a possible phase II prototype system. This report period work summarizes the accomplishments and covers the high points of the two year project. 6 refs., 41 figs.

Johnson, R.; Marcotte, K.; Donnelly, M.

1990-01-01T23:59:59.000Z

150

Automatic generation of search engines  

Science Conference Proceedings (OSTI)

A plethora of enhancements are available to be used together with the ?? search algorithm. There are so many, that their selection and implementation is a non-trivial task, even for the expert. Every domain has its specifics which affect ...

Markian Hlynka; Jonathan Schaeffer

2006-09-01T23:59:59.000Z

151

Automatic safety rod for reactors  

DOE Patents (OSTI)

An automatic safety rod for a nuclear reactor containing neutron absorbing material and designed to be inserted into a reactor core after a loss-of-core flow. Actuation is based upon either a sudden decrease in core pressure drop or the pressure drop decreases below a predetermined minimum value. The automatic control rod includes a pressure regulating device whereby a controlled decrease in operating pressure due to reduced coolant flow does not cause the rod to drop into the core.

Germer, John H. (San Jose, CA)

1988-01-01T23:59:59.000Z

152

A Comparision of Sensorless Control Strategies of Doubly Fed Induction Generator  

Science Conference Proceedings (OSTI)

Decoupled control has been widely used in the DIFG (doubly fed induction generator) which needs the rotor position as well as the rotor speed for the control system. A lot of research has been done in the sensorless control field for the DFIG because ... Keywords: Doubly Fed Induction Generator(DFIG), Decoupled Control, PI adjustor, Rotor position, Rotor speed, Sensorless control, MRAS

Xin Hao; Chong Wei Zhang; Xing Zhang

2009-10-01T23:59:59.000Z

153

Indirect vector control of a squirrel cage induction generator wind turbine  

Science Conference Proceedings (OSTI)

The paper deals with a squirrel cage induction generator connected to the grid through a back-to-back converter driven by vector control. The stator-side converter controls the generator torque by means of an indirect vector control scheme. In order ... Keywords: Back-to-back converter, Low voltage ride through, Squirrel cage induction generator (SCIG), Torque regulation, Vector control, Wind power generation

José Luis DomíNguez-GarcíA; Oriol Gomis-Bellmunt; LluíS Trilla-Romero; Adrií Junyent-Ferré

2012-07-01T23:59:59.000Z

154

Wind turbine power generation emulation via doubly fed induction generator control .  

E-Print Network (OSTI)

??In this thesis, we emulate a Wind Turbine Generator by driving a Doubly Fed Induction Generator (DFIG) via a DC motor with variable input torque… (more)

Edwards, Gregory W.

2009-01-01T23:59:59.000Z

155

Intelligent robust control of hybrid distributed generation system under voltage sag  

Science Conference Proceedings (OSTI)

In this paper, design of control strategy for hybrid fuel cell/energy storage distributed power generation system during voltage sag has been presented. The proposed control strategy allows hybrid distributed generation system works properly when a voltage ... Keywords: Energy storage, Fuel cell, Fuzzy sliding control, Hybrid distributed generation, Lyapanov, Neuro-fuzzy, Voltage sag

Amin Hajizadeh; Masoud Aliakbar Golkar

2010-12-01T23:59:59.000Z

156

Excitation and control of a high-speed induction generator  

E-Print Network (OSTI)

This project investigates the use of a high speed, squirrel cage induction generator and power converter for producing DC electrical power onboard ships and submarines. Potential advantages of high speed induction generators ...

Englebretson, Steven Carl

2005-01-01T23:59:59.000Z

157

Two Families of Sliding Mode Controllers for a Doubly-Fed Induction Generator in an Isolated Generation System  

Science Conference Proceedings (OSTI)

In this paper the authors consider the Sliding Mode Control (SMC) of a Doubly Fed Induction Generator (DFIG), supplying an isolated RL load in a Variable Speed-Constant Frequency (VSCF) generation system. It must be reminded that in electric machines ...

R. Galindo; M. Cotorogea; D. Biel

2006-09-01T23:59:59.000Z

158

Personal Universal Controllers: Controlling Complex Appliances with . . .  

E-Print Network (OSTI)

We envision a future where each person will carry with them a personal universal controller (PUC), a portable computerized device that allows the user to control any appliance within their environment. The PUC has a two-way communication channel with each appliance. It downloads a specification of the appliance's features and then automatically generates an interface for controlling that appliance (graphical, speech, or both). In this demonstration we present a working PUC system that automatically generates graphical and speech interfaces, and controls real appliances, including a shelf stereo and a Sony camcorder.

Jeffrey Nichols; Brad A. Myers; Michael Higgins; Joseph Hughes; Thomas K. Harris; Roni Rosenfeld; Kevin Litwack

2003-01-01T23:59:59.000Z

159

Some noise control problems peculiar to nuclear generating facilities  

Science Conference Proceedings (OSTI)

The ability to confidently predict the noise environment in a nuclear generating facility presently under construction is complicated by the design constraints of physical layout

Robert A. Putnam

1977-01-01T23:59:59.000Z

160

Wind generator-energy storage control schemes for autonomous grid.  

E-Print Network (OSTI)

??Conventionally the power network operators were obliged to buy all the wind energy generated by wind farms. However, as the penetration of wind energy (or… (more)

Fazeli, Meghdad

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

Modeling and control of a cascaded doubly-fed induction generator based on dynamical equivalent circuits  

Science Conference Proceedings (OSTI)

This paper deals with the control of an autonomous cascaded doubly-fed induction generator operating in a variable speed constant frequency mode. The proposed structure is a full stand-alone generating system dedicated to isolated grids in embedded systems ... Keywords: Aircraft applications, Cascaded doubly-fed induction generator, Isolated grid, Modeling, Control, Topology analysis, Variable speed constant frequency

N. Patin; E. Monmasson; J. -P. Louis

2010-10-01T23:59:59.000Z

162

A variable voltage MPPT control method for photovoltaic generation system  

Science Conference Proceedings (OSTI)

To increase the output efficiency of a photovoltaic (PV) generation system it is important to have an efficient maximum power point tracking (MPPT) technique. This paper describes the analysis, design and implementation of an efficient tracking method ... Keywords: maximum power point tracking (MPPT), photovoltaic generation system, pulse-width-modulation (PWM), solar energy, variable voltage

Liu Liqun; Wang Zhixin

2009-04-01T23:59:59.000Z

163

Plenary lecture VIII: a survey of some automotive integrated-starter-generators and their control  

Science Conference Proceedings (OSTI)

Integrated starter generator (ISG) uses one machine to replace conventional starter and alternator onboard vehicles and provides greater electrical generation capacity and improves the fuel economy and emissions. The main requirements of the ISG control ...

Dorin Dumitru Lucache

2008-06-01T23:59:59.000Z

164

THz polaritonics : optical THz generation, detection, and control on a chip  

E-Print Network (OSTI)

The THz polaritonics system is an on-chip platform for THz generation, detection, and control. THz-frequency electromagnetic waves are generated directly in a thin slab of lithium niobate crystal where they can be amplified ...

Werley, Christopher A. (Christopher Alan)

2012-01-01T23:59:59.000Z

165

Comparison of Control Strategy for Double-fed Induction Generator (DFIG)  

Science Conference Proceedings (OSTI)

Vector Control(VC) and Direct Power Control (DPC) of Doubly Fed Induction Generator(DFIG) is studied in this paper. Grid connection and steady state running for DFIG are discussed based on VC and DPC. Two kinds of control strategies of DFIG both have ... Keywords: double-fed induction generator (DFIG), idle load grid-connection, direct power control, vector control, grid voltage orientation

Liu Qizhong; Yu Lan; Wu Guoxiang

2011-01-01T23:59:59.000Z

166

Exhaust gas bypass valve control for thermoelectric generator  

DOE Patents (OSTI)

A method of controlling engine exhaust flow through at least one of an exhaust bypass and a thermoelectric device via a bypass valve is provided. The method includes: determining a mass flow of exhaust exiting an engine; determining a desired exhaust pressure based on the mass flow of exhaust; comparing the desired exhaust pressure to a determined exhaust pressure; and determining a bypass valve control value based on the comparing, wherein the bypass valve control value is used to control the bypass valve.

Reynolds, Michael G; Yang, Jihui; Meisner, Greogry P.; Stabler, Francis R.; De Bock, Hendrik Pieter (Peter) Jacobus; Anderson, Todd Alan

2012-09-04T23:59:59.000Z

167

Monitoring and Controlling Carryover in Heat Recovery Steam Generators  

Science Conference Proceedings (OSTI)

Optimization of the cycle chemistry in the steam generating system of combined-cycle/heat recovery steam generator (HRSG) plants is vital to ensuring the efficient and reliable operation of the equipment. Monitoring of steam purity and drum carryover are core parameters for HRSG chemistry programs. Carryover is any solid, liquid, or vaporous contaminant that leaves the HRSG steam drum along with the steam. Carryover might be the result of the limited separation of the steam/water mixture in the steam dru...

2010-10-27T23:59:59.000Z

168

SABOT: specification-based payload generation for programmable logic controllers  

Science Conference Proceedings (OSTI)

Programmable Logic Controllers (PLCs) drive the behavior of industrial control systems according to uploaded programs. It is now known that PLCs are vulnerable to the uploading of malicious code that can have severe physical consequences. What is not ... Keywords: attack, critical infrastructure, programmable logic controller

Stephen McLaughlin; Patrick McDaniel

2012-10-01T23:59:59.000Z

169

Enabling control software generation by using mechatronics modeling primitives  

Science Conference Proceedings (OSTI)

Mechatronic systems are characterized by the synergetic integration of mechanic, electronic, software and control design aspects. The development of control software requires data and information from all design domains in order to create the required ... Keywords: Control software, Knowledge-Based Engineering, Mechatronics

M. J. Foeken; A. A. Alvarez Cabrera; M. Voskuijl; M. J. L. van Tooren

2012-04-01T23:59:59.000Z

170

Optimal control of generator resynchronisation in electric power systems  

Science Conference Proceedings (OSTI)

Optimal control techniques are discussed for the resynchronisation of a steam turbine unit in an electric power system after it has lost synchronism. A time optimal control is derived and the resulting bang-bang control law is first simulated on an analogue ...

D. Rosenfeld; F. J. Evans

1972-11-01T23:59:59.000Z

171

Grid-connected and control of MPPT for wind power generation systems based on the SCIG  

Science Conference Proceedings (OSTI)

This paper adopts a main circuit structure with back-to-back PWM converter, in which generator-side using direct torque control method, and grid-side adopts three-phase VSR inner current decoupling control based feed forward control algorithms, and this ... Keywords: back-to-back, grid-connected, maximum power point tracking (MPPT), squirrel cage induction generator (SCIG), wind-turbine generation system

Yidong Chen; Yulin Yang; Liqiao Wang; Zhiyun Jia; Weiyang Wu

2010-03-01T23:59:59.000Z

172

Control design and analysis of doubly-fed induction generator in wind power application.  

E-Print Network (OSTI)

??The work presented in this thesis includes control system design, analysis and grid synchronization of a DFIG (doubly-fed induction generator) driven by a wind turbine… (more)

Mazari, Shukul

2009-01-01T23:59:59.000Z

173

Integration of Advanced Emissions Controls to Produce Next-Generation Circulating Fluid Bed Coal Generating Unit (withdrawn prior to award)  

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

contacts contacts Brad tomer Director Office of Major Demonstrations National Energy Technology Laboratory 3610 Collins Ferry Road P.O. Box 880 Morgantown, WV 26507-0880 304-285-4692 brad.tomer@netl.doe.gov PaRtIcIPant Colorado Springs Utilities Colorado Springs, CO aDDItIonaL tEaM MEMBERs Foster Wheeler Power Group, Inc. Clinton, NJ IntegratIon of advanced emIssIons controls to Produce next-generatIon cIrculatIng fluId Bed coal generatIng unIt (wIthdrawn PrIor to award) Project Description Colorado Springs Utilities (Springs Utilities) and Foster Wheeler are planning a joint demonstration of an advanced coal-fired electric power plant using advanced, low-cost emission control systems to produce exceedingly low emissions. Multi- layered emission controls will be

174

Unbiased Statistics of a CSP - A Controlled-Bias Generator  

E-Print Network (OSTI)

We show that estimating the complexity (mean and distribution) of the instances of a fixed size Constraint Satisfaction Problem (CSP) can be very hard. We deal with the main two aspects of the problem: defining a measure of complexity and generating random unbiased instances. For the first problem, we rely on a general framework and a measure of complexity we presented at CISSE08. For the generation problem, we restrict our analysis to the Sudoku example and we provide a solution that also explains why it is so difficult.

Berthier, Denis

2011-01-01T23:59:59.000Z

175

A transformation contract to generate aspects from access control policies  

Science Conference Proceedings (OSTI)

Access control is an important security issue. It has been addressed since the late 1960s in the early time-sharing computer systems. Many access control models have been proposed since than but of particular interest is Ferraiolo and Khun's role-based ...

Christiano Braga

2011-07-01T23:59:59.000Z

176

Program on Technology Innovation: Next Generation Monitoring, Assessment, and Control  

Science Conference Proceedings (OSTI)

Power system operation technologies such as computerized one-line diagram visualization, state estimation, contingency analysis, and distance relay were developed upwards of 50 years ago, However, technological advances in communication, computing, and algorithms have made it possible to reexamine methods for performing real-time monitoring, assessment, and control. This report describes the vision, infrastructure, and technology roadmap for future smart control centers.

2009-01-22T23:59:59.000Z

177

Isolated sub-100-attosecond pulse generation via controlling electron dynamics  

E-Print Network (OSTI)

A new method to coherently control the electron dynamics is proposed using a few-cycle laser pulse in combination with a controlling field. It is shown that this method not only broadens the attosecond pulse bandwidth, but also reduces the chirp, then an isolated 80-as pulse is straightforwardly obtained and even shorter pulse is achievable by increasing the intensity of the controlling field. Such ultrashort pulses allow one to investigate ultrafast electronic processes which have never be achieved before. In addition, the few-cycle synthesized pulse is expected to manipulate a wide range of laser-atom interactions.

Lan, Pengfei; Cao, Wei; Li, Yuhua; Wang, Xinlin

2007-01-01T23:59:59.000Z

178

Definition: Joint Control | Open Energy Information  

Open Energy Info (EERE)

Automatic Generation Control References Glossary of Terms Used in Reliability Standards An LikeLike UnlikeLike You like this.Sign Up to see what your friends like. inline...

179

The Use of Automatic Wire Coding to Evaluate Control Selection Bias in the Savitz et al. Study  

Science Conference Proceedings (OSTI)

One possible explanation of the association between wire codes and childhood cancer is that selecting controls using random digit dialing techniques may have resulted in controls that were not representative of the population from which the cases arose. An under-representation of controls in the highest wire code category could have created the appearance of an association between that category and childhood cancer. The project was designed to evaluate this possibility in the Savitz et al. study in Denver.

1998-10-05T23:59:59.000Z

180

Automatic monitoring helps reduce lighting costs  

SciTech Connect

A Benton, Arkansas utility is using a dimmable ballast system to curb high-intensity-discharge (HID) lighting costs. The system also incorpoates a monitoring control system. This control automatically maintains minimum illumination levels.

1978-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

Control of Combined Storage and Generation in Dynamic Distribution Systems  

E-Print Network (OSTI)

Battery energy storage units provide an added degree of freedom to a microgrid that allows time-shifting between the generation and use of energy. Microgrid energy storage elements are very similar to any other inverter-based source with the exception of bi-directional power flow capabilities. Having the ability to generate and accept power means that the demand and the supply can be disparate by as far as the power capabilities of the energy storage unit allow. This enables combined heat power systems to support a heat load demand independent of local electric power demand. Having an energy storage element on standby also allows for a certain amount of immediately available power to reduce the need for idling or lightly loaded rotating generators under the n-1 stability criterion. The relative speed of any inverter based source allows a sub-cycle change in power output to ensure that dynamic loads will be supplied regardless of the slow reaction of larger rotating sources that require seconds of response time to transients. Thirdly, they can act as a UPS system during grid faults, providing backup power for some time even for non-essential loads while the microgrid is islanded. Lastly, the energy storage element can provide an economic and/or logistical advantage by

Certs Microgrid; Robert Lasseter; Micah Erickson

2009-01-01T23:59:59.000Z

182

Evolution of the CERN Power Converter Function Generator/Controller for Operation in Fast Cycling Accelerators  

E-Print Network (OSTI)

Power converters in the LHC are controlled by the second generation of an embedded computer known as a Function Generator/Controller (FGC2). Following the success of this control system, new power converter installations at CERN will be based around an evolution of the design – a third generation called FGC3. The FGC3 will initially be used in the PS Booster and Linac4. This paper compares the hardware of the two generations of FGC and details the decisions made during the design of the FGC3.

Calcoen, D; Semanaz, PF

2011-01-01T23:59:59.000Z

183

Protection and Control for Grid Connected Photovoltaic Power Generation System Based on Instantaneous Power Theory  

Science Conference Proceedings (OSTI)

Reliable protection and reasonable control run an important role in grid connected PV power generation system. The detection and calculation of real and reactive power are the bases of many inverter resident passive and active islanding detection method ... Keywords: Distributed generation, photovoltaic system, grid connected, protection and control, power theory

Fei Wang; Chengcheng Zhang

2009-05-01T23:59:59.000Z

184

Grid-Connected Marine Current Generation System Power Smoothing Control Using Supercapacitors  

E-Print Network (OSTI)

Grid-Connected Marine Current Generation System Power Smoothing Control Using Supercapacitors to reduce the fluctuation of generator power. In the second step, Supercapacitor (SC) Energy Storage System fluctuation, swell effect, power smoothing control, supercapacitor. I. [NTRODUCTION [n the recent years

Paris-Sud XI, Université de

185

Simulation for Performance Analysis of Grid-Connected Induction Generators with Input Voltage Control  

Science Conference Proceedings (OSTI)

With the increasing application of wind energy, various technologies are developed for analyzing the performance of grid-connected induction generator (GIG) based wind energy conversion systems (WECSs). Input voltage control is one among them. In the ... Keywords: grid-connected induction generators (GIGs), wind energy conversion systems (WECSs), input voltage control, performance analysis, MATLAB

Farhad Ilahi Bakhsh, Shirazul Islam, Sayeed Ahmad

2013-04-01T23:59:59.000Z

186

Transient States of the Multiscalar Controlled Double Fed Induction Generator in the Wind Farm  

Science Conference Proceedings (OSTI)

This article presents a detailed model and analysis of wind turbine based on double fed induction generator (DFIG) including cable line to the point of common coupling (PCC). The vector control system is based on the multiscalar model of the machine. ... Keywords: Double Fed Induction Generator, Multiscalar Control, Reactive Power Compensation, Wind Farm Modelling

Piotr Kolodziejek

2011-12-01T23:59:59.000Z

187

Extreme learning machine based wind speed estimation and sensorless control for wind turbine power generation system  

Science Conference Proceedings (OSTI)

This paper proposes a precise real-time wind speed estimation method and sensorless control for variable-speed variable-pitch wind turbine power generation system (WTPGS). The wind speed estimation is realized by a nonlinear input-output mapping extreme ... Keywords: Extreme learning machine, Sensorless control, Wind speed estimation, Wind turbine power generation system

Si Wu; Youyi Wang; Shijie Cheng

2013-02-01T23:59:59.000Z

188

Automatic Electric Load Identification in  

E-Print Network (OSTI)

Abstract — A microgrid is the power system of choice for the electrification of rural areas in developing countries. It should be able to adapt to changing load situations without the need for specialists to change the configuration of the microgrid controller. This paper proposes a self-configuring microgrid management system that is able to adjust both generation and demand of the system, so that also in case of growing electricity demand the grid can still be operable by disconnecting unessential loads. A crucial task for the microgrid controller is to automatically identify the connected loads on the basis of their consumption behaviors. For this, a template-matching algorithm is proposed that is based on Dynamic Time Warping, which is primarily used in speech recognition. It has been found that for load profile analysis, simple signal features such as the number of rising edges or the aggregated energy consumption in a given time window is sufficient to describe the signal. In contrast to speech recognition, frequency domain analysis is not necessary.

Self-configuring Microgrids; Friederich Kupzog; Tehseen Zia; Adeel Abbas Zaidi

2009-01-01T23:59:59.000Z

189

Effects of voltage control in utility interactive dispersed storage and generation systems  

DOE Green Energy (OSTI)

When a small generator is connected to the distribution system, the voltage at the point of interconnection is determined largely by the system and not the generator. This report examines the effect on the generator, on the load voltage and on the distribution system of a number of different voltage control strategies in the generator. Synchronous generators with three kinds of exciter control are considered, as well as induction generators and dc/ac inverters, with and without capacitor compensation. The effect of varying input power during operation (which may be experienced by generators based on renewable resources) is explored, as well as the effect of connecting and disconnecting the generator at ten percent of its rated power.

Kirkham, H.; Das, R.

1983-03-15T23:59:59.000Z

190

Novel Distributed Generation Control and Dispatching System: Application Validation and Benefits Quantification  

Science Conference Proceedings (OSTI)

This report describes a novel control and dispatching hardware/software system for distributed generation. The system allows the connection of multiple generators at a number of sites to a utility control and monitoring system for the purpose of providing peaking power for the utility. Using distributed generation for this purpose is a potentially cost-effective solution to localized power system constraints caused by the inability to increase power transmission into an area experiencing steady growth in...

2002-10-01T23:59:59.000Z

191

Spectral Phase Distribution Retrieval through Coherent Control of Harmonic Generation  

SciTech Connect

The temporal intensity distribution of the third harmonic of a Ti:sapphire laser generated in Xe gas is fully reconstructed from its spectral phase and amplitude distributions. The spectral phases are retrieved by cross correlating the fundamental laser frequency field with that of the third harmonic, in a three laser versus one harmonic photon coupling scheme. The third harmonic spectral amplitude distribution is extracted from its field autocorrelation. The measured pulse duration is found to be in agreement with that expected from lowest order perturbation theory both for unstretched and chirped pulses.

Papalazarou, E.; Charalambidis, D. [Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, PO Box 1527, GR711 10 Heraklion (Crete) (Greece); Department of Physics, University of Crete, PO Box 2208, GR71003 Heraklion (Crete) (Greece); Kovacev, M.; Tzallas, P.; Benis, E.P.; Kalpouzos, C. [Foundation for Research and Technology - Hellas, Institute of Electronic Structure and Laser, PO Box 1527, GR711 10 Heraklion (Crete) (Greece); Tsakiris, G. D. [Max-Planck-Institut fuer Quantenoptik, D-85748 Garching (Germany)

2006-04-28T23:59:59.000Z

192

Biofouling Control With Ozone at the Bergen Generating Station  

Science Conference Proceedings (OSTI)

Tests were conducted to evaluate the effectiveness of ozone as an alternative to chlorine for condenser biofouling control in a once-through cooling system. A pilot-scale test facility with three model condensors simulated condenser operation and conditions at the Bergen station. Both ozone and chlorine were tested. The minimum effective level of each was determined by daily measurements of heat transfer coefficients across model condenser tubes and/or water-side pressure drop. Final evaluation was based...

1980-11-01T23:59:59.000Z

193

An electrical modeling and fuzzy logic control of a fuel cell generation system  

SciTech Connect

Fuel cell generation system consists of a stack, a reformer, and converters. The stack generates DC power by electrochemical reaction. For system design and analysis, it is necessary to obtain electrical models. Simplified electrical models of a fuel cell generation system for system control are proposed. Then using the electrical models, system performance of a fuel cell generation system in which power is boosted by step-up choppers is analyzed. A fuzzy controller is designed for improved system performance. Simulation and experimental results confirmed the high performance capability of the designed system.

Kim, Y.H.; Kim, S.S. [Chung-Ang Univ., Seoul (Korea, Republic of). Dept. of Electrical Engineering

1999-06-01T23:59:59.000Z

194

Rotor power feedback control of wind turbine system doubly-fed induction generator  

Science Conference Proceedings (OSTI)

The paper deals with a new system of wind turbine active power vector control. The already familiar cascade regulation with internal vector component feedback of rotor current and external active and reactive power feedbacks control of wind turbine has ... Keywords: DFIG rotor power regulator, doubly-fed induction generator, simulation, vector control

J. Smajo

2006-09-01T23:59:59.000Z

195

Impact assessment of wind generation on the operations of a power system  

SciTech Connect

The impact of intermittent wind generation on the operations of the Tennessee Valley Authority (TVA) power system is investigated. The operations of the TVA power system are outlined, and the hypothetical reconfiguration of the TVA transmission system to accommodate wind generation is described. Simulations and analyses of wind generation impacts on unit commitment, unit predispatch, and automatic control of generation are also presented.

Sadanandan, N.D.; Hilson, D.W.; Morris, K.W.; Needham, M.E.; Sendaula, M.

1983-09-01T23:59:59.000Z

196

Automatic rapid attachable warhead section  

DOE Patents (OSTI)

Disclosed are a method and apparatus for automatically selecting warheads or reentry vehicles from a storage area containing a plurality of types of warheads or reentry vehicles, automatically selecting weapon carriers from a storage area containing at least one type of weapon carrier, manipulating and aligning the selected warheads or reentry vehicles and weapon carriers, and automatically coupling the warheads or reentry vehicles with the weapon carriers such that coupling of improperly selected warheads or reentry vehicles with weapon carriers is inhibited. Such inhibition enhances safety of operations and is achieved by a number of means including computer control of the process of selection and coupling and use of connectorless interfaces capable of assuring that improperly selected items will be rejected or rendered inoperable prior to coupling. Also disclosed are a method and apparatus wherein the stated principles pertaining to selection, coupling and inhibition are extended to apply to any item-to-be-carried and any carrying assembly. 10 figures.

Trennel, A.J.

1994-05-10T23:59:59.000Z

197

Automatic rapid attachable warhead section  

DOE Patents (OSTI)

Disclosed are a method and apparatus for (1) automatically selecting warheads or reentry vehicles from a storage area containing a plurality of types of warheads or reentry vehicles, (2) automatically selecting weapon carriers from a storage area containing at least one type of weapon carrier, (3) manipulating and aligning the selected warheads or reentry vehicles and weapon carriers, and (4) automatically coupling the warheads or reentry vehicles with the weapon carriers such that coupling of improperly selected warheads or reentry vehicles with weapon carriers is inhibited. Such inhibition enhances safety of operations and is achieved by a number of means including computer control of the process of selection and coupling and use of connectorless interfaces capable of assuring that improperly selected items will be rejected or rendered inoperable prior to coupling. Also disclosed are a method and apparatus wherein the stated principles pertaining to selection, coupling and inhibition are extended to apply to any item-to-be-carried and any carrying assembly.

Trennel, Anthony J. (Albuquerque, NM)

1994-05-10T23:59:59.000Z

198

Study and Development of Anti-Islanding Control for Synchronous Machine-Based Distributed Generators: November 2001--March 2004  

SciTech Connect

This report summarizes the study and development of new active anti-islanding control schemes for synchronous machine-based distributed generators, including engine generators and gas turbines.

Ye, Z.

2006-03-01T23:59:59.000Z

199

Compensated gain control circuit for buck regulator command charge circuit  

DOE Patents (OSTI)

A buck regulator command charge circuit includes a compensated-gain control signal for compensating for changes in the component values in order to achieve optimal voltage regulation. The compensated-gain control circuit includes an automatic-gain control circuit for generating a variable-gain control signal. The automatic-gain control circuit is formed of a precision rectifier circuit, a filter network, an error amplifier, and an integrator circuit.

Barrett, David M. (Albuquerque, NM)

1996-01-01T23:59:59.000Z

200

DOE Selects Projects to Develop Sensors and Controls for Next-Generation  

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

Selects Projects to Develop Sensors and Controls for Selects Projects to Develop Sensors and Controls for Next-Generation Power Plants DOE Selects Projects to Develop Sensors and Controls for Next-Generation Power Plants August 25, 2009 - 1:00pm Addthis Washington, DC - The U.S. Department of Energy has selected seven projects to develop sensors and controls to support the full-scale implementation and operation of highly efficient power generation technologies with near-zero emissions. The total award value of the projects is nearly $7 million, which includes $1.4 million in cost-sharing from the recipients. The projects will be managed by the Office of Fossil Energy's National Energy Technology Laboratory. Future power generation facilities are expected to be very complex, requiring a high level of system integration for efficient operation. To

Note: This page contains sample records for the topic "automatic generation control" 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

Controlled generation of hard and easy Bayesian networks: Impact on maximal clique size in tree clustering  

Science Conference Proceedings (OSTI)

This article presents and analyzes algorithms that systematically generate random Bayesian networks of varying difficulty levels, with respect to inference using tree clustering. The results are relevant to research on efficient Bayesian network inference, ... Keywords: Bayesian networks, C/V-ratio, Controlled experiments, Maximal clique size, Probabilistic reasoning, Random generation, Tree clustering inference

Ole J. Mengshoel; David C. Wilkins; Dan Roth

2006-11-01T23:59:59.000Z

202

Optimal control in energy conversion of small wind power systems with permanent-magnet-synchronous-generators  

Science Conference Proceedings (OSTI)

This paper presents the results of experimental investigation of a low-power wind energy conversion system (WECS), based on a permanent-magnet synchronous generator (PMSG) connected directly to the turbine. A development system was built in order to ... Keywords: hardware-in-the-loop simulation, maximum power point tracking, optimal control, permanent-magnet synchronous generator, wind system

C. Vlad; I. Munteanu; A. I. Bratcu; E. Ceanga

2008-07-01T23:59:59.000Z

203

Model predictive control system and method for integrated gasification combined cycle power generation  

DOE Patents (OSTI)

Control system and method for controlling an integrated gasification combined cycle (IGCC) plant are provided. The system may include a controller coupled to a dynamic model of the plant to process a prediction of plant performance and determine a control strategy for the IGCC plant over a time horizon subject to plant constraints. The control strategy may include control functionality to meet a tracking objective and control functionality to meet an optimization objective. The control strategy may be configured to prioritize the tracking objective over the optimization objective based on a coordinate transformation, such as an orthogonal or quasi-orthogonal projection. A plurality of plant control knobs may be set in accordance with the control strategy to generate a sequence of coordinated multivariable control inputs to meet the tracking objective and the optimization objective subject to the prioritization resulting from the coordinate transformation.

Kumar, Aditya; Shi, Ruijie; Kumar, Rajeeva; Dokucu, Mustafa

2013-04-09T23:59:59.000Z

204

Automatic service deployment using virtualisation  

E-Print Network (OSTI)

Manual deployment of the application usually requires expertise both about the underlying system and the application. Automatic service deployment can improve deployment significantly by using on-demand deployment and selfhealing services. To support these features this paper describes an extension the Globus Workspace Service [10]. This extension includes creating virtual appliances for Grid services, service deployment from a repository, and influencing the service schedules by altering execution planning services, candidate set generators or information systems. 1 2 1.

Gabor Kecskemeti; Peter Kacsuk; Gabor Terstyanszky; Tamas Kiss; Thierry Delaitre

2008-01-01T23:59:59.000Z

205

Modeling and Control of the PMSG Wind Generation System with a Novel Controller  

Science Conference Proceedings (OSTI)

This paper is based on the maximum power point tracking (MPPT) strategy for Direct Drive Permanent Magnet Synchronous Generator Wind turbine. The parts of generator is setted in d-p synchronous rotating reference frame. And the voltage space vector PWM(SVPWM) ... Keywords: wind power system, PMSG, SVPWM, direct driven wind turbine, variable speed

Shun Yang, Lida Zhang

2013-01-01T23:59:59.000Z

206

Automatic safety rod for reactors. [LMFBR  

DOE Patents (OSTI)

An automatic safety rod for a nuclear reactor containing neutron absorbing material and designed to be inserted into a reactor core after a loss-of-flow. Actuation is based upon either a sudden decrease in core pressure drop or the pressure drop decreases below a predetermined minimum value. The automatic control rod includes a pressure regulating device whereby a controlled decrease in operating pressure due to reduced coolant flow does not cause the rod to drop into the core.

Germer, J.H.

1982-03-23T23:59:59.000Z

207

Sensor-based navigation of a mobile robot using automatically constructed fuzzy rules  

SciTech Connect

A system for automatic generation of fuzzy rules is proposed which is based on a new approach, called ``Fuzzy Behaviorist,`` and on its associated formalism for rule base development in behavior-based robot control systems. The automated generator of fuzzy rules automatically constructs the set of rules and the associated membership functions that implement reasoning schemes that have been expressed in qualitative terms. The system also checks for completeness of the rule base and independence and/or redundancy of the rules to ensure that the requirements of the formalism are satisfied. Examples of the automatic generation of fuzzy rules for cases involving suppression and/or inhibition of fuzzy behaviors are given and discussed. Experimental results obtained with the automated fuzzy rule generator applied to the domain of sensor-based navigation in a priori unknown environments using one of our autonomous test-bed robots are then presented and discussed to illustrate the feasibility of large-scale automatic fuzzy rule generation using our proposed ``Fuzzy Behaviorist`` approach.

Watanabe, Y.; Pin, F.G.

1993-10-01T23:59:59.000Z

208

Heat recovery steam generator outlet temperature control system for a combined cycle power plant  

Science Conference Proceedings (OSTI)

This patent describes a command cycle electrical power plant including: a steam turbine and at least one set comprising a gas turbine, an afterburner and a heat recovery steam generator having an attemperator for supplying from an outlet thereof to the steam turbine superheated steam under steam turbine operating conditions requiring predetermined superheated steam temperature, flow and pressure; with the gas turbine and steam turbine each generating megawatts in accordance with a plant load demand; master control means being provided for controlling the steam turbine and the heat recovery steam generator so as to establish the steam operating conditions; the combination of: first control means responsive to the gas inlet temperature of the heat recovery steam generator and to the plant load demand for controlling the firing of the afterburner; second control means responsive to the superheated steam predetermined temperature and to superheated steam temperature from the outlet for controlling the attemperator between a closed and an open position; the first and second control means being operated concurrently to maintain the superheated steam outlet temperature while controlling the load of the gas turbine independently of the steam turbine operating conditions.

Martens, A.; Myers, G.A.; McCarty, W.L.; Wescott, K.R.

1986-04-01T23:59:59.000Z

209

Real-time deferrable load control: handling the uncertainties of renewable generation  

Science Conference Proceedings (OSTI)

Real-time demand response is essential for handling the uncertainties of renewable generation. Traditionally, demand response has been focused on large industrial and commercial loads, however it is expected that a large number of small residential loads ... Keywords: deferrable load control, demand response, model predictive control, smart grid

Lingwen Gan, Adam Wierman, Ufuk Topcu, Niangjun Chen, Steven H. Low

2013-01-01T23:59:59.000Z

210

Predictive Power Control of Doubly-Fed Induction Generator for Wave Energy Converters  

E-Print Network (OSTI)

the Doubly- fed induction generator (DFIG). This paper deals then with a model-based predictive power control of a DFIG-based Wave Energy Converter (WEC). In the proposed control approach, the predicted output power was calculated using a DFIG linearized state-space model. The DFIG-based WEC power tracking performances further

Paris-Sud XI, Université de

211

Sensorless Adaptive Output Feedback Control of Wind Energy Systems with PMS Generators  

E-Print Network (OSTI)

1 Sensorless Adaptive Output Feedback Control of Wind Energy Systems with PMS Generators A. El the problem of controlling wind energy conversion (WEC) systems involving permanent magnet synchronous is to maximize wind energy extraction which cannot be achieved without letting the wind turbine rotor operate

Paris-Sud XI, Université de

212

A real-time self-tuning fuzzy controller through scaling factor adjustment for the steam generator of NPP  

Science Conference Proceedings (OSTI)

Keywords: fuzzy controller, instantaneous system performance, real-time, scaling factor, self-tuning, steam generator, variable reference tuning index

Chul-Hwan Jung; Chang-Shik Ham; Kuhn-Il Lee

1995-08-01T23:59:59.000Z

213

Controlled generation of field squeezing with cold atomic clouds coupled to a superconducting transmission line resonator  

E-Print Network (OSTI)

We propose an efficient method for controlled generation of field squeezing with cold atomic clouds trapped close to a superconducting transmission line resonator. It is shown that, based on the coherent strong magnetic coupling between the collective atomic spins and microwave fields in the transmission line resonator, two-mode or single mode field squeezed states can be generated through coherent control on the dynamics of the system. The degree of squeezing and preparing time can be directly controlled through tuning the external classical fields. This protocol may offer a promising platform for implementing scalable on-chip quantum information processing with continuous variables.

Li, Peng-Bo

2010-01-01T23:59:59.000Z

214

Controlled generation of field squeezing with cold atomic clouds coupled to a superconducting transmission line resonator  

E-Print Network (OSTI)

We propose an efficient method for controlled generation of field squeezing with cold atomic clouds trapped close to a superconducting transmission line resonator. It is shown that, based on the coherent strong magnetic coupling between the collective atomic spins and microwave fields in the transmission line resonator, two-mode or single mode field squeezed states can be generated through coherent control on the dynamics of the system. The degree of squeezing and preparing time can be directly controlled through tuning the external classical fields. This protocol may offer a promising platform for implementing scalable on-chip quantum information processing with continuous variables.

Peng-Bo Li; Fu-Li Li

2010-02-26T23:59:59.000Z

215

Control of a dynamic brake to reduce turbine-generator shaft transient torques  

SciTech Connect

A resistive, thyristor-controlled brake is used to damp transient torques in large thermo-electric generators supplying series-compensated transmission lines. Emphasis is placed on developing a suitable control algorithm and testing the algorithm through a wide variety of different operating configurations. Discrete-level Generalized Predictive Control is examined as one possible approach to optimal control of the brake. Some problems with implementation of GPC on the system are discussed. Prony analysis is used to identify system transfer functions which are then related to control design considerations and robustness properties.

Donnelly, M.K.; Smith, J.R.; Johnson, R.M. (Montana State Univ., Bozeman, MT (United States)); Hauer, J.F. (Bonneville Power Administration, Kalispell, MT (United States)); Brush, R.W. (Montana Power Co., Butte, MT (United States)); Adapa, R. (Electric Power Research Inst., Palo Alto, CA (United States))

1993-02-01T23:59:59.000Z

216

Integrating Small Scale Distributed Generation into a Deregulated Market: Control Strategies and Price Feedback  

E-Print Network (OSTI)

Small scale power generating technologies, such as gas turbines, small hydro turbines, photovoltaics, wind turbines and fuel cells, are gradually replacing conventional generating technologies, for various applications, in the electric power system. The industry restructuring process in the United States is exposing the power sector to market forces, which is creating competitive structures for generation and alternative regulatory structures for the transmission and distribution systems. The potentially conflicting economic and technical demands of the new, independent generators introduce a set of significant uncertainties. What balance between market forces and centralized control will be found to coordinate distribution system operations? How will the siting of numerous small scale generators in distribution feeders impact the technical operations and control of the distribution system? Who will provide ancillary services (such as voltage support and spinning reserves) in the new competitive environment? This project investigates both the engineering and market integration of distributed generators into the distribution system. On the technical side, this project investigates the frequency performance of a distribution system that has multiple small scale generators. Using IEEE sample distribution systems and new dynamic generator models, this project develops general methods for

Judith Cardell; Marija Ili?; Richard D. Tabors

1997-01-01T23:59:59.000Z

217

Cooldown control system for a combined cycle electrical power generation plant  

SciTech Connect

This patent describes a combined cycle electrical power plant including a steam turbine, a heat recovery steam generator for supplying steam to the steam turbine, a gas turbine for supplying heat to the heat recovery steam generator. The steam generator and gas turbine both produce electrical power under load, and the gas turbine has a control circuit determining the operation therof. A cooldown control system is described for the power generation plant. The system comprises: first means for detecting one of a steaming condition and a non-steaming condition in the heat recovery steam generator; second means responsive to the steaming condition and to a gas turbine STOP signal for reducing the load of the gas turbine toward a minimum load level; third means responsive to the non-steaming condition and to the minimum load level being reached for generating a STOP command and applying the STOP command to the control circuit of the gas turbine, thereby to indicate a sequence of steps to stop the gas turbine.

Martens, A.; Snow, B.E.

1987-01-27T23:59:59.000Z

218

Use of mixed surfactants to generate foams for mobility control in chemical flooding  

Science Conference Proceedings (OSTI)

The application of mixed surfactant foams as an alternative method for mobility control behind a low-concentration chemical flood was evaluated in laboratory experiments. Results indicated that use of alternating slug cycles of gas and selected mixed surfactants resulted in significantly higher differential pressures, [Delta]p, compared with use of only the individual surfactant components, even at low surfactant concentrations. Foams generated with these systems were more stable, even in the presence of oil. The synergistic effect of enhancing foam-generation behavior and stability of these types of systems can improve propagation of a mobility-control front through porous media.

Llave, F.M.; Olsen, D.K. (NIPER/BDM-Oklahoma Inc., Bartlesville, OK (United States))

1994-05-01T23:59:59.000Z

219

Voltage sag ride through using Improved Adaptive Internal Model Controller for doubly fed induction generator wind farms  

Science Conference Proceedings (OSTI)

This paper presents the effect of a single pulse dither signal injection in adaptive internal model controller for a doubly fed induction generator (DFIG)-based wind farm. Rotor current controller using adaptive internal model controller is designed ...

N. Amuthan, P. Subburaj, P. Melba Mary

2013-02-01T23:59:59.000Z

220

THE ORNL ANALYTICAL CHEMISTRY DIVISION'S 150-KV COCKCROFT-WALTON GENERATOR  

SciTech Connect

A general description of the facilities used to house a small Cockcroft- Walton generator is presented. Preliminary irformation and data are given as to the operational performance of the generator, the radiation safety controls involved, and the expected use of the device, In addition, an automatic-manual device for control of tritium target usage is described. (auth)

Strain, J.E.; Hampton, W.J.; Leddicotte, G.W.

1962-09-10T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

SummitView 1.0: a code to automatically generate 3D solid models of surface micro-machining based MEMS designs.  

Science Conference Proceedings (OSTI)

This report describes the SummitView 1.0 computer code developed at Sandia National Laboratories. SummitView is designed to generate a 3D solid model, amenable to visualization and meshing, that represents the end state of a microsystem fabrication process such as the SUMMiT (Sandia Ultra-Planar Multilevel MEMS Technology) V process. Functionally, SummitView performs essentially the same computational task as an earlier code called the 3D Geometry modeler [1]. However, because SummitView is based on 2D instead of 3D data structures and operations, it has significant speed and robustness advantages. As input it requires a definition of both the process itself and the collection of individual 2D masks created by the designer and associated with each of the process steps. The definition of the process is contained in a special process definition file [2] and the 2D masks are contained in MEM format files [3]. The code is written in C++ and consists of a set of classes and routines. The classes represent the geometric data and the SUMMiT V process steps. Classes are provided for the following process steps: Planar Deposition, Planar Etch, Conformal Deposition, Dry Etch, Wet Etch and Release Etch. SummitView is built upon the 2D Boolean library GBL-2D [4], and thus contains all of that library's functionality.

McBride, Cory L. (Elemental Technologies, American Fort, UT); Yarberry, Victor R.; Schmidt, Rodney Cannon; Meyers, Ray J. (Elemental Technologies, American Fort, UT)

2006-11-01T23:59:59.000Z

222

Nonlinear Dual-Mode Control of Variable-Speed Wind Turbines with Doubly Fed Induction Generators  

E-Print Network (OSTI)

This paper presents a feedback/feedforward nonlinear controller for variable-speed wind turbines with doubly fed induction generators. By appropriately adjusting the rotor voltages and the blade pitch angle, the controller simultaneously enables: (a) control of the active power in both the maximum power tracking and power regulation modes, (b) seamless switching between the two modes, and (c) control of the reactive power so that a desirable power factor is maintained. Unlike many existing designs, the controller is developed based on original, nonlinear, electromechanically-coupled models of wind turbines, without attempting approximate linearization. Its development consists of three steps: (i) employ feedback linearization to exactly cancel some of the nonlinearities and perform arbitrary pole placement, (ii) design a speed controller that makes the rotor angular velocity track a desired reference whenever possible, and (iii) introduce a Lyapunov-like function and present a gradient-based approach for mini...

Tang, Choon Yik; Jiang, John N

2010-01-01T23:59:59.000Z

223

Asymmetric trajectory generation and impedance control for running of biped robots  

Science Conference Proceedings (OSTI)

An online asymmetric trajectory generation method for biped robots is proposed to maintain dynamical postural stability and increase energy autonomy, based on the running stability criterion defined in phases. In a support phase, an asymmetric trajectories ... Keywords: Angular momentum, Asymmetric trajectory, Biped robot, Impedance control, Running stability

Ohung Kwon; Jong Hyeon Park

2009-01-01T23:59:59.000Z

224

Control of Natural Gas Catalytic Partial Oxidation for Hydrogen Generation in Fuel Cell Applications1  

E-Print Network (OSTI)

Control of Natural Gas Catalytic Partial Oxidation for Hydrogen Generation in Fuel Cell Ghosh3 , Huei Peng2 Abstract A fuel processor that reforms natural gas to hydrogen-rich mixture to feed of the hydrogen in the fuel processor is based on catalytic partial oxidation of the methane in the natural gas

Peng, Huei

225

Microwave-controlled generation of shaped single photons in circuit quantum electrodynamics  

E-Print Network (OSTI)

Coherent generation of single photons with waveforms of a given shape plays an important role in many protocols for quantum information exchange between distant quantum bits. Here we create shaped microwave photons in a superconducting system consisting of a transmon circuit coupled to a transmission line resonator. Using the third level of the transmon, we exploit a second-order transition induced by a modulated microwave drive to controllably transfer an excitation to the resonator from which it is emitted into a transmission line as a travelling photon. We demonstrate the single-photon nature of the emitted field and the ability to generate photons with a controlled amplitude and phase. In contrast to similar schemes, the presented one requires only a single control line, allowing for a simple implementation with fixed-frequency qubits.

M. Pechal; C. Eichler; S. Zeytinoglu; S. Berger; A. Wallraff; S. Filipp

2013-08-19T23:59:59.000Z

226

Towards automatic security management: a model-based approach  

Science Conference Proceedings (OSTI)

This paper introduces a security management approach that integrates system monitoring, intrusion detection, and automatic control in order to detect, classify and protect against security attacks automatically. The model-based controller computes the ... Keywords: DoS attack, detection, optimization, protection

Qian Chen; Sherif Abdelwahed; Weston Monceaux

2013-01-01T23:59:59.000Z

227

Original article: Adaptive sliding mode control of interleaved parallel boost converter for fuel cell energy generation system  

Science Conference Proceedings (OSTI)

This paper deals with the problem of controlling energy generation systems including fuel cells (FCs) and interleaved boost power converters. The proposed nonlinear adaptive controller is designed using sliding mode control (SMC) technique based on the ... Keywords: Adaptive control, Fuel cell, Interleaved boost converter, Sliding mode control

H. El Fadil, F. Giri, Josep M. Guerrero

2013-05-01T23:59:59.000Z

228

An automatic image based modeling system by patch growing  

Science Conference Proceedings (OSTI)

In this paper, we present an automatic and efficient image based modeling system which can create objects' 3D models directly from images captured from different viewpoints. The system firstly uses structure from motion to generate camera parameters ... Keywords: automatic, image based modeling, patch, quasi dense, system

Bo Shu; Ting Li; Xianjie Qiu; Zhaoqi Wang

2009-05-01T23:59:59.000Z

229

Automatic array privatization  

Science Conference Proceedings (OSTI)

This chapter discusses techniques for automatic array privatization developed as part of the Polaris project at the University of Illinois at Urbana-Champaign. Array privatization is one of the most important transformations for effective program parallelization. ...

Peng Tu; David Padua

2001-06-01T23:59:59.000Z

230

Automatic thesaurus construction  

Science Conference Proceedings (OSTI)

In this paper we introduce a novel method of automating thesauri using syntactically constrained distributional similarity. With respect to syntactically conditioned cooccurrences, most popular approaches to automatic thesaurus construction simply ignore ... Keywords: distribution, similarity, syntactic dependency

Dongqiang Yang; David M. Powers

2008-01-01T23:59:59.000Z

231

Monitoring and control requirement definition study for dispersed storage and generation (DSG). Volume I. Final report  

DOE Green Energy (OSTI)

Dispersed Storage and Generation (DSG) is the term that characterizes the present and future dispersed, relatively small (<30 MW) energy systems, such as solar thermal electric, photovoltaic, wind, fuel cell, storage battery, hydro, and cogeneration, that can help achieve national energy conservation goals and can be dispersed throughout the distribution portion of an electric utility system. A study of trends reveals that the need for DSG monitoring and control equipment by 1990 to 2000 will be great, measured in tens of thousands. Criteria for assessing DSG integration have been defined and indicate that economic and institutional as well as technical and other factors must be included. The principal emphasis in this report is on the functional requirements for DSG monitoring and control in six major categories. Twenty-four functional requirements have been prepared under these six categories and serve to indicate how to integrate the DSGs with the distribution and other portions of the electric utility system. The results indicate that there are no fundamental technical obstacles to prevent the connection of dispersed storage and generation to the distribution system. However, a communication system of some sophistication will be required to integrate the distribution system and the dispersed generation sources for effective control. The large-size span of generators from 10 kW to 30 MW means that a variety of remote monitoring and control may be required. The results show that an increased effort is required to develop demonstration equipment to perform the DSG monitoring and control functions and to acquire experience with this equipment in the utility distribution environment.

Not Available

1980-10-01T23:59:59.000Z

232

Advanced control for power density maximization of the brushless DC generator  

E-Print Network (OSTI)

This dissertation proposes a novel control technique for power density maximization of the brushless DC (BLDC) generator which is a nonsinusoidal power supply system. In a generator of given rating, the weight and size of the system affect the fuel consumption directly, therefore power density is one of the most important issues in a stand-alone generator. Conventional rectification methods cannot achieve the maximum power possible because of a distorted or unsuitable current waveform. The optimal current waveform for maximizing power density and minimizing machine size and weight in a nonsinusoidal power supply system has been proposed theoretically and verified by simulation and experimental work. Also, various attributes of practical interest are analyzed and simulated to investigate the impact on real systems.

Lee, Hyung-Woo

2003-12-01T23:59:59.000Z

233

Dynamic performance and control of a static var generator using cascade multilevel inverters  

SciTech Connect

A cascade multilevel inverter is proposed for static VAR shifting, compensation/generation applications. The new cascade M-level inverter consists of (M-1)/2 single-phase full bridges in which each bridge has its own separate dc source. This inverter can generate almost sinusoidal waveform voltage with only one time switching per cycle. It can eliminate the need for transformers in multipulse inverters. A prototype static VAR generator (SVG) system using 11- level cascade inverter (21-level line-to-line voltage waveform) has been built. The output voltage waveform is equivalent to that of a 60- pulse inverter. This paper focuses on dynamic performance of the cascade inverter based SVG system. Control schemes are proposed to achieve a fast response which is impossible for a conventional static VAR compensator (SVC). Analytical, simulated and experimental results show the superiority of the proposed SVG system.

Peng, Fang Zheng [Tennessee Univ., Knoxville, TN (United States); Lai, Jih-Sheng [Oak Ridge National Lab., TN (United States)

1996-10-01T23:59:59.000Z

234

Automatic implementation generation for pervasive applications  

E-Print Network (OSTI)

Pervasive computing promises to put computers in almost every corner of our life. Unfortunately, it also promises to make programmers' jobs harder since they cannot know what components are available in the run-time ...

Paluska, Justin Mazzola, 1981-

2004-01-01T23:59:59.000Z

235

AIMHelp: generating help for GUI applications automatically  

Science Conference Proceedings (OSTI)

Help systems are a requirement in most modern applications. However, current mainstream help systems can be improved to provide information that is more relevant and accurate. This paper introduces a new approach for help systems -- AIMHelp -- that can ... Keywords: automated help, context-sensitive help, dynamic help, explanation strategies, reflection

Yashasvi Appilla Chakravarthi; Christof Lutteroth; Gerald Weber

2009-07-01T23:59:59.000Z

236

Automatic generation of XSLT by simultaneous editing  

E-Print Network (OSTI)

The proliferation of XML during recent years has been aided by an array of powerful companion tools. One such tool, XSL Transformations (XSLTs), has played an important role in XML's adoption, facilitating interoperability ...

Stube, Brian A. (Brian Andrew), 1980-

2004-01-01T23:59:59.000Z

237

User evaluation of automatically generated semantic hypertext ...  

Science Conference Proceedings (OSTI)

... This paper is an interim report on our efforts to ... The work reported on here forms part of our ... the 1977 amendments to the Federal Coal Mine Health ...

238

Power and Frequency Control as it Relates to Wind-Powered Generation  

SciTech Connect

This report is a part of an investigation of the ability of the U.S. power system to accommodate large scale additions of wind generation. The objectives of this report are to describe principles by which large multi-area power systems are controlled and to anticipate how the introduction of large amounts of wind power production might require control protocols to be changed. The operation of a power system is described in terms of primary and secondary control actions. Primary control is fast, autonomous, and provides the first-line corrective action in disturbances; secondary control takes place on a follow-up time scale and manages the deployment of resources to ensure reliable and economic operation. This report anticipates that the present fundamental primary and secondary control protocols will be satisfactory as wind power provides an increasing fraction of the total production, provided that appropriate attention is paid to the timing of primary control response, to short term wind forecasting, and to management of reserves for control action.

Lacommare, Kristina S H

2010-12-20T23:59:59.000Z

239

Support and control system of the Waste Isolation Pilot Plant gas generation experiment glovebox  

SciTech Connect

A glovebox was designed and fabricated to house test containers loaded with contact handled transuranic (CH-TRU) waste. The test containers were designed to simulate the environmental characteristics of the caverns at the Waste Isolation Pilot Plant (WIPP). The support and control systems used to operate and maintain the Gas Generation Experiment (GGE) include the following: glovebox atmosphere and pressure control, test container support, glovebox operation support, and gas supply and exhaust systems. The glovebox atmosphere and pressure control systems consist of various components used to control both the pressure and quality of the argon atmosphere inside the glovebox. The glovebox pressure is maintained by three separate pressure control systems. The primary pressure control system is designed to maintain the glovebox at a negative pressure with the other two control systems serving as redundant safety backups. The quality of the argon atmosphere is controlled using a purifying bed system that removes oxygen and moisture. Glovebox atmosphere contaminants that are monitored on a continuous or periodic basis include moisture, oxygen, and nitrogen. The gas generation experiment requires the test containers to be filled with brine, leak tested, maintained at a constant temperature, and the gas head space of the test container sampled on a periodic basis. Test container support systems consisting of a brine addition system, leak test system, heating system, and gas sampling system were designed and implemented. A rupture disk system was constructed to provide pressure relief to the test containers. Operational requirements stipulated that test container temperature and pressure be monitored and collected on a continuous basis. A data acquisition system (DAS) was specifically designed to meet these requirements.

Benjamin, W.W.; Knight, C.J.; Michelbacher, J.A.; Rosenberg, K.E.

1997-09-01T23:59:59.000Z

240

Automatic Clouds Observation Improved by an Artificial Neural Network  

Science Conference Proceedings (OSTI)

This paper refers to a project aimed at building a device able to generate fully automatic meteorological weather reports (METAR) during the night at Swiss airports. Such reports include the description of sky conditions, namely, the heights and ...

Frédéric Aviolat; Thierry Cornu; Daniel Cattani

1998-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

Reasoning about metamodeling with formal specifications and automatic proofs  

Science Conference Proceedings (OSTI)

Metamodeling is foundational to many modeling frameworks, and so it is important to formalize and reason about it. Ideally, correctness proofs and test-case generation on the metamodeling framework should be automatic. However, it has yet to be shown ...

Ethan K. Jackson; Tihamér Levendovszky; Daniel Balasubramanian

2011-10-01T23:59:59.000Z

242

Decoding the `Nature Encoded' Messages for Distributed Energy Generation Control in Microgrid  

E-Print Network (OSTI)

The communication for the control of distributed energy generation (DEG) in microgrid is discussed. Due to the requirement of realtime transmission, weak or no explicit channel coding is used for the message of system state. To protect the reliability of the uncoded or weakly encoded messages, the system dynamics are considered as a `nature encoding' similar to convolution code, due to its redundancy in time. For systems with or without explicit channel coding, two decoding procedures based on Kalman filtering and Pearl's Belief Propagation, in a similar manner to Turbo processing in traditional data communication systems, are proposed. Numerical simulations have demonstrated the validity of the schemes, using a linear model of electric generator dynamic system.

Gong, Shuping; Lai, Lifeng; Qiu, Robert C

2010-01-01T23:59:59.000Z

243

Control of decoherence in the generation of photon pairs from atomic ensembles  

E-Print Network (OSTI)

We report an investigation to establish the physical mechanisms responsible for decoherence in the generation of photon pairs from atomic ensembles, via the protocol of Duan et. al for long distance quantum communication [Nature (London) 414, 413 (2001)] and present the experimental techniques necessary to properly control the process. We develop a theory to model in detail the decoherence process in experiments with magneto-optical traps. The inhomogeneous broadening of the ground state by the trap magnetic field is identified as the principal mechanism for decoherence. In conjunction with our theoretical analysis, we report a series of measurements to characterize and control the coherence time in our experimental setup. We use copropagating stimulated Raman spectroscopy to access directly the ground state energy distribution of the ensemble. These spectroscopic measurements allow us to switch off the trap magnetic field in a controlled way, optimizing the repetition rate for single-photon measurements. With the magnetic field off, we then measure nonclassical correlations for pairs of photons generated by the ensemble as a function of the storage time of the single collective atomic excitation. We report coherence times longer than 10 microseconds, corresponding to an increase of two orders of magnitude compared to previous results in cold ensembles. The coherence time is now two orders of magnitude longer than the duration of the excitation pulses. The comparison between these experimental results and the theory shows good agreement. Finally, we employ our theory to devise ways to improve the experiment by optical pumping to specific initial states.

D. Felinto; C. W. Chou; H. de Riedmatten; S. V. Polyakov; H. J. Kimble

2005-07-13T23:59:59.000Z

244

Proving Theorems Automatically, Semi-Automatically, and Interactively  

E-Print Network (OSTI)

-automatic using MONSTRO · Automatic using DIY #12;Church's Type Theory Alonzo Church, "A Formulation of the Simple the wffs needed to instan- tiate quantifiers from wffs already present in the proof. Use DIY-L to fill

Clarke, Edmund M.

245

Deaerator pressure control system for a combined cycle steam generator power plant  

Science Conference Proceedings (OSTI)

In a combined cycle steam generation power plant, until steam extraction can be used to reheat the deaerator, the economizer and/or the pegging recirculation are controlled so as to track the pressure upwards of the autocirculation reheater from the low pressure evaporator with a certain lag in pressure, and to establish pressure in the deaerator on the decreasing trend of the autocirculation reheater at a slower rate and without lowering below a minimum pressure so as to prevent the occurrence of bubbling and cavitation effect.

Martens, A.; Myers, G. A.

1985-12-03T23:59:59.000Z

246

Reactor component automatic grapple  

DOE Patents (OSTI)

A grapple for handling nuclear reactor components in a medium such as liquid sodium which, upon proper seating and alignment of the grapple with the component as sensed by a mechanical logic integral to the grapple, automatically seizes the component. The mechanical logic system also precludes seizure in the absence of proper seating and alignment.

Greenaway, Paul R. (Bethel Park, PA)

1982-01-01T23:59:59.000Z

247

Automatic sweep circuit  

DOE Patents (OSTI)

An automatically sweeping circuit for searching for an evoked response in an output signal in time with respect to a trigger input. Digital counters are used to activate a detector at precise intervals, and monitoring is repeated for statistical accuracy. If the response is not found then a different time window is examined until the signal is found.

Keefe, Donald J. (Lemont, IL)

1980-01-01T23:59:59.000Z

248

Variable cooling circuit for thermoelectric generator and engine and method of control  

DOE Patents (OSTI)

An apparatus is provided that includes an engine, an exhaust system, and a thermoelectric generator (TEG) operatively connected to the exhaust system and configured to allow exhaust gas flow therethrough. A first radiator is operatively connected to the engine. An openable and closable engine valve is configured to open to permit coolant to circulate through the engine and the first radiator when coolant temperature is greater than a predetermined minimum coolant temperature. A first and a second valve are controllable to route cooling fluid from the TEG to the engine through coolant passages under a first set of operating conditions to establish a first cooling circuit, and from the TEG to a second radiator through at least some other coolant passages under a second set of operating conditions to establish a second cooling circuit. A method of controlling a cooling circuit is also provided.

Prior, Gregory P

2012-10-30T23:59:59.000Z

249

Fuel cell generator with fuel electrodes that control on-cell fuel reformation  

Science Conference Proceedings (OSTI)

A fuel cell for a fuel cell generator including a housing including a gas flow path for receiving a fuel from a fuel source and directing the fuel across the fuel cell. The fuel cell includes an elongate member including opposing first and second ends and defining an interior cathode portion and an exterior anode portion. The interior cathode portion includes an electrode in contact with an oxidant flow path. The exterior anode portion includes an electrode in contact with the fuel in the gas flow path. The anode portion includes a catalyst material for effecting fuel reformation along the fuel cell between the opposing ends. A fuel reformation control layer is applied over the catalyst material for reducing a rate of fuel reformation on the fuel cell. The control layer effects a variable reformation rate along the length of the fuel cell.

Ruka, Roswell J. (Pittsburgh, PA); Basel, Richard A. (Pittsburgh, PA); Zhang, Gong (Murrysville, PA)

2011-10-25T23:59:59.000Z

250

Automatic toilet seat lowering apparatus  

DOE Patents (OSTI)

A toilet seat lowering apparatus includes a housing defining an internal cavity for receiving water from the water supply line to the toilet holding tank. A descent delay assembly of the apparatus can include a stationary dam member and a rotating dam member for dividing the internal cavity into an inlet chamber and an outlet chamber and controlling the intake and evacuation of water in a delayed fashion. A descent initiator is activated when the internal cavity is filled with pressurized water and automatically begins the lowering of the toilet seat from its upright position, which lowering is also controlled by the descent delay assembly. In an alternative embodiment, the descent initiator and the descent delay assembly can be combined in a piston linked to the rotating dam member and provided with a water channel for creating a resisting pressure to the advancing piston and thereby slowing the associated descent of the toilet seat. A toilet seat lowering apparatus includes a housing defining an internal cavity for receiving water from the water supply line to the toilet holding tank. A descent delay assembly of the apparatus can include a stationary dam member and a rotating dam member for dividing the internal cavity into an inlet chamber and an outlet chamber and controlling the intake and evacuation of water in a delayed fashion. A descent initiator is activated when the internal cavity is filled with pressurized water and automatically begins the lowering of the toilet seat from its upright position, which lowering is also controlled by the descent delay assembly. In an alternative embodiment, the descent initiator and the descent delay assembly can be combined in a piston linked to the rotating dam member and provided with a water channel for creating a resisting pressure to the advancing piston and thereby slowing the associated descent of the toilet seat.

Guerty, Harold G. (Palm Beach Gardens, FL)

1994-09-06T23:59:59.000Z

251

MCS researchers coedit proceedings on automatic differentiation | Argonne  

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

MCS researchers coedit proceedings on automatic differentiation MCS researchers coedit proceedings on automatic differentiation July 22, 2013 Tweet EmailPrint The fundamental goal behind differentiating numerical computations is to be able to generate - ideally automatically - efficient derivative code for models implemented as computer programs. Achieving this goal in practice has proved challenging, especially for numerical models on parallel architectures. To track the progress in addressing the challenges, and to present the state of the art in automatic differentiation (AD), every four years the scientific community holds a conference focusing on AD applications in science and engineering, its theory, and the development of compiler-based tools and web-based differentiation services. The Sixth International Conference on Automatic Differentiation (AD2012) held in Fort Collins,

252

Steam Generator Management Program: Effects of Different pH Control Agents on Pressurized Water Reactor Plant Systems and Components  

Science Conference Proceedings (OSTI)

Corrosion of materials in the condensate, feedwater, and drain systems of PWRs generates a significant amount of corrosion products in the secondary cycle. These corrosion products are generally transported into the steam generators and deposit on tubing surfaces, tubesheets, and tube support plates. Increased corrosion results in elevated levels of undesired corrosion products being deposited into the steam generators. To minimize corrosion of the secondary system components, control of pH in the second...

2009-12-04T23:59:59.000Z

253

Study of Various Types of Faults with Neuro Fuzzy Controlled SSSC and STATCOM in Stabilization of Grid Connected Wind Generator  

Science Conference Proceedings (OSTI)

When wind farm is integrated to the power system, it has stability problem. Fixed speed induction generators require reactive power to maintain air gap flux. Reactive power equipments like Static Synchronous Compensator (STATCOM) and Static Synchronous ... Keywords: wind farm, grid, Induction generator (IG), STATCOM, SSSC, reactive power compensation, Neuro fuzzy controller (NFC), various types of faults

Rohi Kachroo; H. S. Dalvi

2012-11-01T23:59:59.000Z

254

Automatic detection of sweep-meshable volumes  

DOE Patents (OSTI)

A method of and software for automatically determining whether a mesh can be generated by sweeping for a representation of a geometric solid comprising: classifying surface mesh schemes for surfaces of the representation locally using surface vertex types; grouping mappable and submappable surfaces of the representation into chains; computing volume edge types for the representation; recursively traversing surfaces of the representation and grouping the surfaces into source, target, and linking surface lists; and checking traversal direction when traversing onto linking surfaces.

Tautges; Timothy J. (Madison, WI), White; David R. (Pittsburgh, PA)

2006-05-23T23:59:59.000Z

255

Method of controlling temperature of a thermoelectric generator in an exhaust system  

DOE Patents (OSTI)

A method of controlling the temperature of a thermoelectric generator (TEG) in an exhaust system of an engine is provided. The method includes determining the temperature of the heated side of the TEG, determining exhaust gas flow rate through the TEG, and determining the exhaust gas temperature through the TEG. A rate of change in temperature of the heated side of the TEG is predicted based on the determined temperature, the determined exhaust gas flow rate, and the determined exhaust gas temperature through the TEG. Using the predicted rate of change of temperature of the heated side, exhaust gas flow rate through the TEG is calculated that will result in a maximum temperature of the heated side of the TEG less than a predetermined critical temperature given the predicted rate of change in temperature of the heated side of the TEG. A corresponding apparatus is provided.

Prior, Gregory P; Reynolds, Michael G; Cowgill, Joshua D

2013-05-21T23:59:59.000Z

256

Dream controller  

SciTech Connect

A method and apparatus for intelligently controlling continuous process variables. A Dream Controller comprises an Intelligent Engine mechanism and a number of Model-Free Adaptive (MFA) controllers, each of which is suitable to control a process with specific behaviors. The Intelligent Engine can automatically select the appropriate MFA controller and its parameters so that the Dream Controller can be easily used by people with limited control experience and those who do not have the time to commission, tune, and maintain automatic controllers.

Cheng, George Shu-Xing; Mulkey, Steven L; Wang, Qiang; Chow, Andrew J

2013-11-26T23:59:59.000Z

257

202 IEEE TRANS.4CTIONS Oh'AUTOMATIC CONTROL, VOL. AC-18,NO. 3, J U K E 1973 Design and Analysis of Boiler-Turbine-Generator  

E-Print Network (OSTI)

pressure PTS psi (MPa) 4 Attemperator valve area AAT * Electrical power JGN MW components is implicitly

Kwatny, Harry G.

258

Decentralized Control to Augment LVRT Capability of Wind Generators with STATCOM/ESS  

E-Print Network (OSTI)

are still in operation. Also, during large disturbances, doubly-fed induction generators (DFIG) behave

Pota, Himanshu Roy

259

A Study of Distributed Generation System Characteristics and Protective Load Control Strategy  

E-Print Network (OSTI)

turbines: Doubly-fed Induction Generator (DFIG) and Fixed-speed Wind Turbine (FSWT) are compared), Distributed Generation System (DGS), Doubly- fed Induction Generator (DFIG), Fixed-speed Wind Turbine (FSWT (FSWT) and doubly-fed induction generator wind turbine (DFIG) have different characteristics, when

Chen, Zhe

260

Controlled operation of variable speed driven permanent magnet synchronous generator for wind energy conversion systems  

Science Conference Proceedings (OSTI)

The introduction of distributed generation through renewable sources of energy has opened a challenging area for power engineers. As these sources are intermittent in nature, variable speed electric generators are employed for harnessing electrical energy ... Keywords: permanent magnet synchronous generator, power conditioners, power quality, variable speed generators, wind energy

Rajveer Mittal; K. S. Sandhu; D. K. Jain

2009-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

Decision-Support Software for Grid Operators: Transmission Topology Control for Infrastructure Resilience to the Integration of Renewable Generation  

SciTech Connect

GENI Project: The CRA team is developing control technology to help grid operators more actively manage power flows and integrate renewables by optimally turning on and off entire power lines in coordination with traditional control of generation and load resources. The control technology being developed would provide grid operators with tools to help manage transmission congestion by identifying the facilities whose on/off status must change to lower generation costs, increase utilization of renewable resources and improve system reliability. The technology is based on fast optimization algorithms for the near to real-time change in the on/off status of transmission facilities and their software implementation.

2012-03-16T23:59:59.000Z

262

Second Generation Advanced Reburning for High Efficiency N0x Control  

Science Conference Proceedings (OSTI)

Energy and Environmental Research Corporation is developing a family of high efficiency and low cost NO{sub x} control technologies for coal fired utility boilers based on Advanced Reburning (AR), a synergistic integration of basic reburning with injection of an N-agent. In conventional AR, injection of the reburn fuel is followed by simultaneous N-agent and overfire air injection. The second generation AR systems incorporate several components which can be used in different combinations. These components include: (1) Reburning Injection of the reburn fuel and overfire air. (2) N-agent Injection The N-agent (ammonia or urea) can be injected at different locations: into the reburning zone, along with the overfire air, and downstream of the overfire air injection. (3) N-agent Promotion Several sodium compounds can considerably enhance the NO{sub x} control from N-agent injection. These ''promoters'' can be added to aqueous N-agents. (4) Two Stages of N-agent Injection and Promotion Two N-agents with or without promoters can be injected at different locations for deeper NO{sub x} control. AR systems are intended for post-RACT applications in ozone non-attainment areas where NO{sub x} control in excess of 80% is required. AR will provide flexible installations that allow NO{sub x} levels to be lowered when regulations become more stringent. The total cost of NO{sub x} control for AR systems is approximately half of that for SCR. Experimental and kinetic modeling results for development of these novel AR systems are presented. Tests have been conducted in a 1.0 MMBtu/hr Boiler Simulator Facility with coal as the main fuel and natural gas as the reburning fuel. The results show that high efficiency NO{sub x} control, in the range 84-95%, can be achieved with various elements of AR. A comparative byproduct emission study was performed to compare the emissions from different variants of AR with commercial technologies (reburning and SNCR). For each technology sampling included: CO, SO{sub 2}, N{sub 2}O, total hydrocarbons, NH{sub 3}, HCN, SO{sub 3}, fly ash mass loading and size distribution, PM10, and carbon in ash. AR technologies do not generate significant byproduct emissions in comparison with basic reburning and SNCR processes under similar conditions. In most cases, byproduct emissions were found to be lower for the AR technologies. Kinetic modeling predictions qualitatively explain the experimental trends observed in the combustion tests. The detailed reaction mechanism can describe the interaction of NO and ammonia in the reburning and overfire air zones, the effect of mixing times, and the sodium promotion effect.

Zamansky, Vladimir M.; Maly, Peter, M.; Sheldon, Mark; Seeker, W. Randall; Folsom, Blair A.

1997-12-31T23:59:59.000Z

263

Combined cycle electric power plant and heat recovery steam generator having improved multi-loop temperature control of the steam generated  

SciTech Connect

A combined cycle electric power plant is described that includes gas and steam turbines and a steam generator for recovering the heat in the exhaust gases exited from the gas turbine and for using the recovered heat to produce and supply steam to the steam turbine. The steam generator includes a superheater tube and a steam drum from which heated steam is directed through the superheater to be additionally heated into superheated steam by the exhaust gas turbine gases. An afterburner serves to further heat the exhaust gas turbine gases passed to the superheater tube and a bypass conduit is disposed about the superheater tube whereby a variable steam flow determined by a bypass valve disposed in the bypass conduit may be directed about the superheater tube to be mixed with the superheated steam therefrom, whereby the temperature of the superheated steam supplied to the steam turbine may be accurately controlled. Steam temperature control means includes a first control loop responsive to the superheated steam temperature for regulating the position of the bypass valve with respect to a first setpoint, and a second control loop responsive to the superheated steam temperature for controlling the fuel supply to the afterburner with respect to a second setpoint varying in accordance with the bypass valve position. In particular, as the bypass valve position increases, the second setpoint, originally higher, is lowered toward a value substantially equal to that of the first setpoint.

Martz, L.F.; Plotnick, R.J.

1976-08-17T23:59:59.000Z

264

Identification and Testing of Amines for Steam Generator Chemistry and Deposit Control  

Science Conference Proceedings (OSTI)

This report summarizes an investigation on optimization of water chemistry to reduce steam generator (SG) fouling. Researchers sought to identify amine additives that can minimize fouling in pressurized water reactor (PWR) steam generators.

2002-12-09T23:59:59.000Z

265

Orio: Automatic Performance Tuning | Argonne National Laboratory  

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

Orio: Automatic Performance Tuning Orio: Automatic Performance Tuning High-level depiction of the structure and the optimization process of the Orio framework High-level depiction of the structure and the optimization process of the Orio framework Orio is an annotation-based empirical tuning system aimed at improving both performance and productivity by enabling software developers to insert annotations in the form of structured comments into their source code. Given the annotated code as input, Orio generates many tuned versions of the same operation and empirically evaluates the versions to select the best-performing one for a specified code fragment. People Involved Azamat Mametjanov Other Contributors Boyana Norris (University of Oregon) Albert Hartono (Ohio State) P. Sadayappan (Ohio State)

266

Robot path generation method for a welding system based on pseudo stereo visual servo control  

Science Conference Proceedings (OSTI)

A path generation method for robot-based welding systems is proposed. The method that is a modification of the method "teaching by showing" is supported by the recently developed pseudo stereovision system (PSVS). A path is generated by means of the ... Keywords: calibration, complex image, path generation, pseudo stereovision system, robotic application humanPT, target-object

Theodore P. Pachidis; Kostas N. Tarchanidis; John N. Lygouras; Philippos G. Tsalides

2005-01-01T23:59:59.000Z

267

Research on the Control Strategy of Low Voltage Ride-Through for Doubly Fed Induction Generator  

Science Conference Proceedings (OSTI)

With the development of modern wind energy generation, higher requirements to the grid in case of a failure were raised. In order to faciliate the recovery of power, while voltage dips in a certain range, protecting the rotor side converter and providing ... Keywords: Wind energy generation, Doubly fed generator, Voltage sag, Dynamic response analysis

Zhang Jianhua; Wang Jian; Mo Yueping; Xin Fulong

2011-02-01T23:59:59.000Z

268

Acoustic emission feedback control for control of boiling in a microwave oven  

DOE Patents (OSTI)

An acoustic emission based feedback system for controlling the boiling level of a liquid medium in a microwave oven is provided. The acoustic emissions from the medium correlated with surface boiling is used to generate a feedback control signal proportional to the level of boiling of the medium. This signal is applied to a power controller to automatically and continuoulsly vary the power applied to the oven to control the boiling at a selected level.

White, Terry L. (Oak Ridge, TN)

1991-01-01T23:59:59.000Z

269

Acoustic emission feedback control for control of boiling in a microwave oven  

DOE Patents (OSTI)

An acoustic emission based feedback system for controlling the boiling level of a liquid medium in a microwave oven is provided. The acoustic emissions from the medium correlated with surface boiling is used to generate a feedback control signal proportional to the level of boiling of the medium. This signal is applied to a power controller to automatically and continuously vary the power applied to the oven to control the boiling at a selected level. 2 figs.

White, T.L.

1990-05-02T23:59:59.000Z

270

Power and Frequency Control as it Relates to Wind-Powered Generation  

E-Print Network (OSTI)

The work described in this report was funded by the Federal Energy Regulatory Commission, Office of Electric Reliability through a subcontract administered by the Lawrence Berkeley National Laboratory, which is operated by the University of California for the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Disclaimer This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by its trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof, or The Regents of the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof, or The Regents of the University of California. Ernest Orlando Lawrence Berkeley National Laboratory is an equal opportunity employer. Power and Frequency Control as it Relates to Wind-Powered Generation

Ernest Orlando Lawrence; John Undrill; John Undrill Llc; John Undrill; John Undrill Llc

2010-01-01T23:59:59.000Z

271

Frequency Response Adequacy and Assessment: Global Industry Practices and Potential Impact of Changing Generation Mix  

Science Conference Proceedings (OSTI)

The electric power industry, the North American Reliability Corporation (NERC) and the US Federal Energy Regulatory Commission (FERC) have expressed concerns about frequency response of the North American power system, which has declined over the past few decades.  The industry is concerned about having adequate primary frequency control (governing), automatic generation control (AGC), operating reserve and ramping resources to meet frequency response needs, in light of the changing generation ...

2012-12-31T23:59:59.000Z

272

Automatic targeting of plasma spray gun  

DOE Patents (OSTI)

A means for monitoring the material portion in the flame of a plasma spray gun during spraying operations is provided. A collimated detector, sensitive to certain wavelengths of light emission, is used to locate the centroid of the material with each pass of the gun. The response from the detector is then relayed to the gun controller to be used to automatically realign the gun.

Abbatiello, Leonard A. (Oak Ridge, TN); Neal, Richard E. (Heiskell, TN)

1978-01-01T23:59:59.000Z

273

Wien Automatic System Planning (WASP) Package | Open Energy Information  

Open Energy Info (EERE)

Wien Automatic System Planning (WASP) Package Wien Automatic System Planning (WASP) Package Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Wien Automatic System Planning (WASP) Package Agency/Company /Organization: International Atomic Energy Agency Sector: Energy Focus Area: Renewable Energy, Energy Efficiency Topics: Pathways analysis Resource Type: Software/modeling tools Website: www-pub.iaea.org/MTCD/publications/PDF/CMS-16.pdf Cost: Free References: WASP[1] "The WASP-IV code permits finding the optimal expansion plan for a power generating system over a period of up to thirty years, within constraints given by the planner." References ↑ "WASP" Retrieved from "http://en.openei.org/w/index.php?title=Wien_Automatic_System_Planning_(WASP)_Package&oldid=403685

274

Power and Frequency Control as it Relates to Wind-Powered Generation  

E-Print Network (OSTI)

inherent in power system operations. Primary Control is theoperation of a power system is described in terms of primary and secondary control

Lacommare, Kristina S H

2011-01-01T23:59:59.000Z

275

Decentralized control techniques applied to electric power distributed generation in microgrids.  

E-Print Network (OSTI)

??Distributed generation of electric energy has become part of the current electric power system. In this context a new scenario is arising in which small… (more)

Vásquez Quintero, Juan Carlos

2009-01-01T23:59:59.000Z

276

Adaptive control and parameter identification of a doubly-fed induction generator for wind power .  

E-Print Network (OSTI)

??The use of Doubly-Fed Induction Generators (DFIG) for wind energy conversion is addressed in this thesis. It is well known that when the stator is… (more)

Orfanos-Pepainas, Stamatios

2011-01-01T23:59:59.000Z

277

Controlling diesel NOx & PM emissions using fuel components and enhanced aftertreatment techniques: developing the next generation emission control system.  

E-Print Network (OSTI)

??The following research thesis focuses on methods of controlling nitrogen oxides (NO(X)) and particulate matter (PM) emissions emitted from a low temperature diesel exhaust. This… (more)

Gill, Simaranjit Singh

2012-01-01T23:59:59.000Z

278

Combined cycle electric power plant having a control system which enables dry steam generator operation during gas turbine operation  

SciTech Connect

A control system for a combined cycle electric power plant is described. It contains: at least one gas turbine including an exit through which heated exhaust gases pass; means for generating steam coupled to said gas turbine exit for transferring heat from the exhaust gases to a fluid passing through the steam generator; a steam turbine coupled to the steam generator and driven by the steam supplied thereby; means for generating electric power by the driving power of the turbines; condenser means for receiving and converting the spent steam from the steam turbine into condensate; and steam generating means comprising a low pressure storage tank, a first heat exchange tube, a boiler feedwater pump for directing fluid from a low pressure storage tank through the first heat exchange tube, a main storage drum, a second heat exchange tube, and a high pressure recirculation pump for directing fluid from the main storage pump through the second heat exchange tube. The control system monitors the temperature of the exhaust gas turbine gases as directed to the steam generator and deactuates the steam turbine when a predetermined temperature is exceeded.

Martz, L.F.; Plotnick, R.J.

1974-08-08T23:59:59.000Z

279

Decentralized optimal neuro-controllers for generation and transmission devices in an electric power network  

Science Conference Proceedings (OSTI)

In this paper, the dual heuristic programming (DHP) optimization algorithm is applied for the design of two LOCAL nonlinear optimal neuro-controllers on a practical multi-machine power system. One neuro-controller is designed to replace the conventional ... Keywords: Decentralized control, Dual heuristic programming, Optimal neuro-controller, Power network, Series capacitive reactance compensator

Jung-Wook Park; Ronald G. Harley; Ganesh K. Venayagamoorthy

2005-02-01T23:59:59.000Z

280

PhotoVoltaic distributed generation for Lanai power grid real-time simulation and control integration scenario.  

Science Conference Proceedings (OSTI)

This paper discusses the modeling, analysis, and testing in a real-time simulation environment of the Lanai power grid system for the integration and control of PhotoVoltaic (PV) distributed generation. The Lanai Island in Hawaii is part of the Hawaii Clean Energy Initiative (HCEI) to transition to 30% renewable green energy penetration by 2030. In Lanai the primary loads come from two Castle and Cook Resorts, in addition to residential needs. The total peak load profile is 12470 V, 5.5 MW. Currently there are several diesel generators that meet these loading requirements. As part of the HCEI, Lanai has initially installed 1.2 MW of PV generation. The goal of this study has been to evaluate the impact of the PV with respect to the conventional carbon-based diesel generation in real time simulation. For intermittent PV distributed generation, the overall stability and transient responses are investigated. A simple Lanai 'like' model has been developed in the Matlab/Simulink environment (see Fig. 1) and to accommodate real-time simulation of the hybrid power grid system the Opal-RT Technologies RT-Lab environment is used. The diesel generators have been modelled using the SimPowerSystems toolbox swing equations and a custom Simulink module has been developed for the High level PV generation. All of the loads have been characterized primarily as distribution lines with series resistive load banks with one VAR load bank. Three-phase faults are implemented for each bus. Both conventional and advanced control architectures will be used to evaluate the integration of the PV onto the current power grid system. The baseline numerical results include the stable performance of the power grid during varying cloud cover (PV generation ramping up/down) scenarios. The importance of assessing the real-time scenario is included.

Robinett, Rush D., III; Kukolich, Keith (Opal RT Technologies, Montreal, Quebec, Canada); Wilson, David Gerald; Schenkman, Benjamin L.

2010-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

New generation of the SORTI instruments  

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

New generation of the SORTI instruments New generation of the SORTI instruments Hawat, Tom Denver University Murcray, Frank University of Denver Category: Instruments In order to generate long-term monitoring data of the atmospheric composition using SORTI instrument and integrated in the Aura validation campaign, a new instrument generation has been developed. SORTI is a Fourier Transform Spectrometer system, including an automatic solar tracker and a computer for control, data processing, and storage. SORTI is refurbished and operates to generate very high spectral resolution (~0.004 cm-1) infrared spectra (2.5 to 14 microns, 4000 to 750 cm-1) of the earth's atmosphere using the sun as the external source. The instrument enables one to perform the operation of the spectrometric atmospheric

282

Automatic Parallel Parking and Returning to Traffic Maneuvers  

E-Print Network (OSTI)

This video illustrates a control approach developed to perform parallel parking and returning to traffic maneuvers for a car capable of autonomous motion. The key idea is to carry out a motion control procedure involving a "Localization-Planning-Execution" cycle until a specified location of the car relative to its environment is reached. Range measurements are used to model environmental objects around the car. The automatic maneuvers developed are demonstrated on an experimental electric autonomous car in a usual traffic environment. 1 Introduction Many drivers have difficulties or make errors while parallel parking or in pulling out of a parking place. A control approach to automatic parallel parking and pulling out maneuvers has been developed and tested on an experimental electric car capable of autonomous motion. The manual car driving is supplemented with an automatic steering and velocity control [1]. The car is equiped with: (1) - a sensor unit to measure relative distances ...

Igor Paromtchik; Christian Laugier

1998-01-01T23:59:59.000Z

283

Fuel cell generator energy dissipator  

DOE Patents (OSTI)

An apparatus and method are disclosed for eliminating the chemical energy of fuel remaining in a fuel cell generator when the electrical power output of the fuel cell generator is terminated. During a generator shut down condition, electrically resistive elements are automatically connected across the fuel cell generator terminals in order to draw current, thereby depleting the fuel

Veyo, Stephen Emery (Murrysville, PA); Dederer, Jeffrey Todd (Valencia, PA); Gordon, John Thomas (Ambridge, PA); Shockling, Larry Anthony (Pittsburgh, PA)

2000-01-01T23:59:59.000Z

284

JMLUnit: the next generation  

Science Conference Proceedings (OSTI)

Designing unit test suites for object-oriented systems is a painstaking, repetitive, and error-prone task, and significant research has been devoted to the automatic generation of test suites. One method for generating unit tests is to use formal class ...

Daniel M. Zimmerman; Rinkesh Nagmoti

2010-06-01T23:59:59.000Z

285

Power and Frequency Control as it Relates to Wind-Powered Generation  

E-Print Network (OSTI)

LFC) commands issued by BAs. In this regard they are verya power system in which two BAs are interconnected by aControl Error (ACE) of the BAs. Power and Frequency Control

Lacommare, Kristina S H

2011-01-01T23:59:59.000Z

286

Low-Power Maximum Power Point Tracker with Digital Control for Thermophotovoltaic Generators  

E-Print Network (OSTI)

This paper describes the design, optimization, and evaluation of the power electronics circuitry for a low-power portable thermophotovotaic (TPV) generator system. TPV system is based on a silicon micro-reactor design and ...

Pilawa, Robert

287

ROBUST CONTROL ANALYSIS USING REAL-TIME IMPLEMENTATION OF A HYBRID FUEL CELL POWER GENERATION SYSTEM  

E-Print Network (OSTI)

is performed for a hybrid Fuel Cell/Supercapacitor generation system with power management, realized through converters interfacing the Fuel Cell (FC) and the Supercapacitor (SC) with the system electrical load

Paris-Sud XI, Université de

288

Voltage control scheme in distribution network with double feed induction generator wind farm  

Science Conference Proceedings (OSTI)

This paper presents the particle swarm optimization (PSO) for reactive power and voltage control (Volt/Var Control) in distribution system considering DFIG wind farm. In this paper, the reactive power output of DFIG wind farm has been considered as the ... Keywords: DFIG wind turbine, Volt/Var control, distribution network, optimization, particle swarm, wind farm

Jingjing Zhao; Xin Li; Jutao Hao

2009-08-01T23:59:59.000Z

289

MPPT of Solar Energy Generating System with Fuzzy Control and Artificial Neural Network  

Science Conference Proceedings (OSTI)

In order to achieve maximum power of solar cell, we focus on the maximum power point tracking (MPPT) algorithm forming based on fuzzy control. The fuzzy control rules are adopted using artificial neural network with measured data. Compared the fuzzy ... Keywords: Maximum power point tracking, Fuzzy control, artificial neural network, simulation

Keya Huang; Wenshi Li; Xiaoyang Huang

2011-09-01T23:59:59.000Z

290

Automatic Adjustment of AVHRR Navigation  

Science Conference Proceedings (OSTI)

An automatic adjustment method of the Advanced Very High-Resolution Radiometer (AVHRR) images navigation has been developed for operational use at the Centre de Météorologic Spatiale (CMS) in Lannion, France. Selected coastal landmarks are ...

Philippe Bordes; Pascal Brunel; Anne Marsouin

1992-02-01T23:59:59.000Z

291

Automatic discovery of algorithms for multi-agent systems  

Science Conference Proceedings (OSTI)

Automatic algorithm generation for large-scale distributed systems is one of the holy grails of artificial intelligence and agent-based modeling. It has direct applicability in future engineered (embedded) systems, such as mesh networks of sensors and ... Keywords: genetic programming

Sjors van Berkel; Daniel Turi; Andrei Pruteanu; Stefan Dulman

2012-07-01T23:59:59.000Z

292

NNSA's next generation safeguards initiative to define an effective state system of accounting and control  

SciTech Connect

The International Nuclear Safeguards and Engagement Program (INSEP), the international outreach component of the Next Generation Safeguards Initiative (NGSI), is a collaborative program that endeavors to strengthen international safeguards at all stages of nuclear development. One of the critical ways the program achieves this objective is through working with partners to increase the effectiveness of the State System of Accountancy for and Control of Nuclear Materials (SSAC) - the essential elements of national, regulatory and facility safeguards competencies that work as a system to provide the International Atomic Energy Agency (IAEA) and the world the full assurance of the state's adherence to its safeguards agreements. INSEP provides assistance in developing a state's SSAC in a number of areas, from developing national legislation governing the possession and use of nuclear material to working with nuclear facility operators to developing good practices in waste management. INSEP has collaborated with foreign partners in peaceful nuclear applications for over two decades, but recently, it has focused its efforts on strengthening SSACs due to the growth of nuclear power worldwide, particularly in countries with limited nuclear infrastructures. This new area of focus has prompted INSEP to develop a model of SSAC competencies that will serve not only as a structure for its engagement with partner states, but also as a means to facilitate coordination with other states that provide training and assistance, and as a mechanism for evaluating the effectiveness of its work in reaching its intended objectives. While this model uses as its starting point the requirements on a State that are presented in the Comprehensive Safeguards Agreement and the Additional Protocol, it is not, in itself, a requirements document or guidance for implementing requirements. It is rather an analysis of what capabilities will be needed in a State to be able to meet requirements and to build confidence in the State System. Viewed from this perspective, the model can be thought of as a quality assurance tool that assists states in ensuring that the outputs of their State System (the tangible 'goods' that are provided to the International Atomic Energy Agency under the State's agreements) are of high quality. As such, this tool is for the internal use of a State System that wishes to assess and improve its capacity. It is not intended for comparison or outside evaluation. In addition to providing a self-assessment tool, INSEP expects this model to be useful in several other ways: it will inform the approach that INSEP uses in bilateral consultations to identify areas where INSEP outreach and training may be of value, and it will provide a structure for its training curriculum. It will help INSEP to evaluate the effectiveness of its outreach - where there are gaps in the training provided, and whether the training that is provided meets its stated objectives. Finally, it will provide a framework for coordinating with the IAEA and other member states in the 'harmonization' efforts currently underway to align the outreach efforts of states that provide safeguards training. This paper describes the process of evaluation that INSEP is developing. It looks at the expected usefulness of the metrics for conducting self-assessments and joint assessments and enabling partners to identify training needs. The paper begins with a description of various performance requirements that define what must be done at the state and facility level to implement effective and efficient international safeguards. Next, technical performance measures are discussed, that define how well a state and its facilities are fulfilling these requirements. Then a functional analysis is conducted to align the technical requirements with competencies and determine who should carry out the various activities necessary to fulfill the performance requirements. Finally, the paper concludes with a discussion about SEP's approach in applying the metrics to its outreach activities intended to

Stevens, Rebecca S [Los Alamos National Laboratory; Sunshine, Alexander [NNSA; Matthews, Caroline [PNNL; Frazer, Sarah [PNNL; Matthews, Carrie [NON LANL

2010-01-01T23:59:59.000Z

293

NNSA's next generation safeguards initiative to define an effective state system of accounting and control  

Science Conference Proceedings (OSTI)

The International Nuclear Safeguards and Engagement Program (INSEP), the international outreach component of the Next Generation Safeguards Initiative (NGSI), is a collaborative program that endeavors to strengthen international safeguards at all stages of nuclear development. One of the critical ways the program achieves this objective is through working with partners to increase the effectiveness of the State System of Accountancy for and Control of Nuclear Materials (SSAC) - the essential elements of national, regulatory and facility safeguards competencies that work as a system to provide the International Atomic Energy Agency (IAEA) and the world the full assurance of the state's adherence to its safeguards agreements. INSEP provides assistance in developing a state's SSAC in a number of areas, from developing national legislation governing the possession and use of nuclear material to working with nuclear facility operators to developing good practices in waste management. INSEP has collaborated with foreign partners in peaceful nuclear applications for over two decades, but recently, it has focused its efforts on strengthening SSACs due to the growth of nuclear power worldwide, particularly in countries with limited nuclear infrastructures. This new area of focus has prompted INSEP to develop a model of SSAC competencies that will serve not only as a structure for its engagement with partner states, but also as a means to facilitate coordination with other states that provide training and assistance, and as a mechanism for evaluating the effectiveness of its work in reaching its intended objectives. While this model uses as its starting point the requirements on a State that are presented in the Comprehensive Safeguards Agreement and the Additional Protocol, it is not, in itself, a requirements document or guidance for implementing requirements. It is rather an analysis of what capabilities will be needed in a State to be able to meet requirements and to build confidence in the State System. Viewed from this perspective, the model can be thought of as a quality assurance tool that assists states in ensuring that the outputs of their State System (the tangible 'goods' that are provided to the International Atomic Energy Agency under the State's agreements) are of high quality. As such, this tool is for the internal use of a State System that wishes to assess and improve its capacity. It is not intended for comparison or outside evaluation. In addition to providing a self-assessment tool, INSEP expects this model to be useful in several other ways: it will inform the approach that INSEP uses in bilateral consultations to identify areas where INSEP outreach and training may be of value, and it will provide a structure for its training curriculum. It will help INSEP to evaluate the effectiveness of its outreach - where there are gaps in the training provided, and whether the training that is provided meets its stated objectives. Finally, it will provide a framework for coordinating with the IAEA and other member states in the 'harmonization' efforts currently underway to align the outreach efforts of states that provide safeguards training. This paper describes the process of evaluation that INSEP is developing. It looks at the expected usefulness of the metrics for conducting self-assessments and joint assessments and enabling partners to identify training needs. The paper begins with a description of various performance requirements that define what must be done at the state and facility level to implement effective and efficient international safeguards. Next, technical performance measures are discussed, that define how well a state and its facilities are fulfilling these requirements. Then a functional analysis is conducted to align the technical requirements with competencies and determine who should carry out the various activities necessary to fulfill the performance requirements. Finally, the paper concludes with a discussion about SEP's approach in applying the metrics to its outreach activities intended to

Stevens, Rebecca S [Los Alamos National Laboratory; Sunshine, Alexander [NNSA; Matthews, Caroline [PNNL; Frazer, Sarah [PNNL; Matthews, Carrie [NON LANL

2010-01-01T23:59:59.000Z

294

Power and Frequency Control as it Relates to Wind-Powered Generation  

E-Print Network (OSTI)

2   1.4   Modes of Power Plant32   4.3   Power Plant Controls (Plant Operation by24. Effect of frequency bias in power plant preselected load

Lacommare, Kristina S H

2011-01-01T23:59:59.000Z

295

Real-time digital control of DFIG-based wind generators for grid support.  

E-Print Network (OSTI)

??In this thesis, a set of new converter /control techniques are developed for the Grid Side and Rotor Side converter applications in DFIG wind power… (more)

Mesbah, Mohsen

2012-01-01T23:59:59.000Z

296

Applications of automatic differentiation in CFD  

DOE Green Energy (OSTI)

Automated multidisciplinary design of aircraft requires the optimization of complex performance objectives with respect to a number of design parameters and constraints. The effect of these independent design variables on the system performance criteria can be quantified in terms of sensitivity derivatives for the individual discipline simulation codes. Typical advanced CFD codes do not provide such derivatives as part of a flow solution. These derivatives are expensive to obtain by divided differences from perturbed solutions, and may be unreliable, particularly for noisy functions. In this paper, automatic differentiation has been investigated as a means of extending iterative CFD codes with sensitivity derivatives. In particular, the ADIFOR automatic differentiator has been applied to the 3-D, thin-layer Navier-Stokes, multigrid flow solver called TLNS3D coupled with the WTCO wing grid generator. Results of a sequence of efforts in which TLNS3D has been successfully augmented to compute a variety of sensitivities are presented. It is shown that sensitivity derivatives can be obtained accurately and efficiently using ADIFOR, although significant advances are necessary for the efficiency of ADIFOR-generated derivative code to become truly competitive with hand-differentiated code.

Carle, A. [Rice Univ., Houston, TX (United States); Green, L.L.; Newman, P.A. [National Aeronautics and Space Administration, Hampton, VA (United States). Langley Research Center; Bischof, C.H. [Argonne National Lab., IL (United States)

1994-06-01T23:59:59.000Z

297

Diagnosis and Isolation of Air Gap Eccentricities in Closed-loop Controlled Doubly-Fed Induction Generators  

E-Print Network (OSTI)

With the widespread use of doubly-fed induction generators (DFIG) in wind energy conversion systems, condition monitoring is being given importance. Non-intrusive techniques like motor current signature analysis (MCSA), which involves looking for specific frequency components in the current spectrum, are preferred over analysis of magnetic field, temperature, vibrations or acoustic noise which require additional sensors. The major difficulty in MCSA is isolation of the fault, as multiple faults produce similar signatures. Moreover, closed-loop control makes diagnostics more complicated due to inherent compensation by the controller. This thesis presents a method to diagnose static and dynamic air gap eccentricities in doubly-fed induction generators operated for closed-loop stator power control by using a modified control technique to enable detection and isolation of this fault from electrical unbalances in the stator and rotor and load torque oscillations that produce similar effects. The effectiveness of the proposed control is verified using simulations and preliminary experiments performed on a healthy machine.

Meenakshi Sundaram, Vivek

2011-05-01T23:59:59.000Z

298

New-generation CRT-controller ICS cut display costs, increase capabilities  

SciTech Connect

The newest VLSI CRT-controller chips, by condensing into one 40-pin dip the capabilities of hundreds of TTL devices, are dramatically lowering the cost of advanced raster-scanned CRT displays. The author considers these CRT controllers, and their applications, including graphics terminals.

Cushman, R.H.

1982-05-12T23:59:59.000Z

299

Reference variables generation using a fuzzy trajectory controller for PM tubular linear synchronous motor drive  

Science Conference Proceedings (OSTI)

The usage of linear permanent-magnet (PM) actuators, and their associated controllers, increases in a wide variety of applications, due to the exhibited high force density, robustness, and accuracy. The s-curve motion profiling is the motion trajectory ... Keywords: fuzzy logic control, modelling and simulation, trajectory tracking

R. Luís; J. C. Quadrado

2005-06-01T23:59:59.000Z

300

Water Reactor Chemical Volume and Control System and Steam Generator Blowdown Resins and Filters Sourcebook: 2013 Edition  

Science Conference Proceedings (OSTI)

An understanding of ion exchange practices within the industry for the removal of soluble and insoluble contaminants and filtration practices for the removal of insoluble contaminants is important for providing insight into beneficial practices as well as conditions to avoid. This report includes information on system descriptions, system operating practices, resins, and filters used in pressurized water reactor (PWR) chemical volume and control, makeup purification, and steam generator blowdown ...

2013-08-23T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

A Novel MPPT Control Technology Based on Cloud Model for Photovoltaic Power Generation  

Science Conference Proceedings (OSTI)

The cloud model is a mathematical representation to fuzziness and randomness in linguistic concepts, and integrates the fuzziness and randomness of a linguistic concept in a unified way. This model is a new method for transformation between qualitative ... Keywords: photovoltaic power generation, MPPT, duty factor, cloud model

Lei An; Wei Fan

2011-10-01T23:59:59.000Z

302

Identification and Testing of Amines for Steam Generator Chemistry and Deposit Control, Part 2  

Science Conference Proceedings (OSTI)

This report summarizes a multi-year laboratory investigative program on optimization of water chemistry to reduce steam generator (SG) fouling. This work has demonstrated that surface chemistry significantly affects SG fouling. Furthermore, the investigation identified and demonstrated an amine additive that is a significant SG fouling inhibitor.

2003-11-25T23:59:59.000Z

303

Tailoring the Content of Dynamically Generated Explanations  

Science Conference Proceedings (OSTI)

This paper describes briefly an approach for tailoring the content of automatically generated hypertext explanations. The implemented pilot system hylite+ has a dynamically updated user model, which is used by the language generation modules to adapt ...

Kalina Bontcheva

2001-07-01T23:59:59.000Z

304

Power and Frequency Control as it Relates to Wind-Powered Generation  

E-Print Network (OSTI)

pressure controller of a steam turbine. For the purpose ofthe response of steam turbines to governing action: R = 0.05cycle plants. The steam turbines of these plants are most

Lacommare, Kristina S H

2011-01-01T23:59:59.000Z

305

Automatic Detection of Omissions in Translations  

E-Print Network (OSTI)

ADOMIT is an algorithm for Automatic Detection of OMissions in Translations. The algorithm relies solely on geometric analysis of bitext maps and uses no linguistic informatlon. This property allows it to deal equally well with omissions that do not correspond to linguistic units, such as might resuit fi'om word-processing mishaps. ADOMIT has proven itself by discovering many errors in a handconstructed gold standard for evaluating bitext mapping algorithms. Quantitative evaluation on simulated omissions showed that, even with today's poor bitext mapping technology, ADOMIT is a valuable quality control tool for translators and translation bureaus.

I. Dan Melamed

1996-01-01T23:59:59.000Z

306

Incorporating Variable Generation and Controllable Loads into Risk-Based Transmission Planning  

Science Conference Proceedings (OSTI)

As the penetration and size of renewable generation resources increase, transmission infrastructure must be expanded to accommodate increasing renewable resource output. Conventional transmission expansion planning requires sufficient transmission capacities to transfer the full name-plate capacity of all power plants at the same time to load centers. However, renewable resources, such as wind and solar, have highly variable output and are spatially diversified. Thus, transmission expansion planning with...

2010-12-31T23:59:59.000Z

307

Quasi-phase matching and quantum control of high harmonic generation in waveguides using counterpropagating beams  

DOE Patents (OSTI)

All-optical quasi-phase matching (QPM) uses a train of counterpropagating pulses to enhance high-order harmonic generation (HHG) in a hollow waveguide. A pump pulse enters one end of the waveguide, and causes HHG in the waveguide. The counterpropagation pulses enter the other end of the waveguide and interact with the pump pulses to cause QPM within the waveguide, enhancing the HHG.

Zhang, Xiaoshi (Superior, CO); Lytle, Amy L. (Boulder, CO); Cohen, Oren (Boulder, CO); Kapteyn, Henry C. (Boulder, CO); Murnane, Margaret M. (Boulder, CO)

2010-11-09T23:59:59.000Z

308

Monitoring and control requirement definition study for dispersed storage and generation (DSG). Volume II. Final report, Appendix A: selected DSG technologies and their general control requirements  

SciTech Connect

A major aim of the US National Energy Policy, as well as that of the New York State Energy Research and Development Authority, is to conserve energy and to shift from oil to more abundant domestic fuels and renewable energy sources. Dispersed Storage and Generation (DSG) is the term that characterizes the present and future dispersed, relatively small (<30 MW) energy systems, such as solar thermal electric, photovoltaic, wind, fuel cell, storage battery, hydro, and cogeneration, which can help achieve these national energy goals and can be dispersed throughout the distribution portion of an electric utility system. The purpose of this survey and identification of DSG technologies is to present an understanding of the special characteristics of each of these technologies in sufficient detail so that the physical principles of their operation and the internal control of each technology are evident. In this way, a better appreciation can be obtained of the monitoring and control requirements for these DSGs from a remote distribution dispatch center. A consistent approach is being sought for both hardware and software which will handle the monitoring and control necessary to integrate a number of different DSG technologies into a common distribution dispatch network. From this study it appears that the control of each of the DSG technologies is compatible with a supervisory control method of operation that lends itself to remote control from a distribution dispatch center.

1980-10-01T23:59:59.000Z

309

Automatic Library Tracking Database Infrastructure  

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

Libraries » ALTD Libraries » ALTD ALTD Automatic Library Tracking Database Infrastructure To track and monitor library usage and better serve your software needs, we have enabled the Automatic Library Tracking Database (ALTD) on our prodcution systems, Hopper and Edison. ALTD is also availailable on Carver, but has not enabled for all users by default yet. ALTD, developed by National Institute for Computational Sciences, automatically and transparently tracks all libraries linked into an application at compile time, as well as the libraries used at run time, by intercepting the linker (ld) and the job launcher (aprun, or mpirun). It is a light-weight tool, and should not change your experience with compilation and execution of codes on the machine. However, if you encounter any problems due to ALTD,

310

A Development of Design and Control Methodology for Next Generation Parallel Hybrid Electric Vehicle  

E-Print Network (OSTI)

Commercially available Hybrid Electric Vehicles (HEVs) have been around for more than ten years. However, their market share remains small. Focusing only on the improvement of fuel economy, the design tends to reduce the size of the internal combustion engine in the HEV, and uses the electrical drive to compensate for the power gap between the load demand and the engine capacity. Unfortunately, the low power density and the high cost of the combined electric motor drive and battery packs dictate that the HEV has either worse performance or much higher price than the conventional vehicle. In this research, a new design philosophy for parallel HEV is proposed, which uses a full size engine to guarantee the vehicle performance at least as good as the conventional vehicle, and hybridizes with an electrical drive in parallel to improve the fuel economy and performance beyond the conventional cars. By analyzing the HEV fuel economy versus the increasing of the electrical drive power on typical driving conditions, the optimal hybridization electric power capacity is determined. Thus, the full size engine HEV shows significant improvement in fuel economy and performance, with relatively short cost recovery period. A new control strategy, which optimizes the fuel economy of parallel configured charge sustained hybrid electric vehicles, is proposed in the second part of this dissertation. This new approach is a constrained engine on-off strategy, which has been developed from the two extreme control strategies of maximum SOC and engine on-off, by taking their advantages and overcoming their disadvantages. A system optimization program using dynamic programming algorithm has been developed to calibrate the control parameters used in the developed control strategy, so that the control performance can be as close to the optimal solution as possible. In order to determine the sensitivity of the new control strategy to different driving conditions, a passenger car is simulated on different driving cycles. The performances of the vehicle with the new control strategy are compared with the optimal solution obtained on each driving condition with the dynamic programming optimization. The simulation result shows that the new control strategy always keeps its performance close to the optimal one, as the driving condition changes.

Lai, Lin

2013-05-01T23:59:59.000Z

311

Generation of non-axisymmetric scrape-off layer perturbations for controlling tokamak edge plasma profiles and stability  

Science Conference Proceedings (OSTI)

A critical requirement for tokamak fusion reactors is the control of the divertor heat load, both the time-averaged value and the impulsive fluxes that accompany edge-localized modes. We propose driving toroidally varying currents through the scrape-off layer (SOL) plasma both to broaden the SOL by inducing radial convection and to control the edge pressure gradient by inducing resonant magnetic perturbations. The generation of additional convective transport via steady-state convective cells or increased turbulence drive requires that the electric potential perturbations exceed a threshold in amplitude that depends on wavelength. The generation of a coherent magnetic perturbation is optimized by choosing the appropriate width and phasing of the biasing region at the target plate in order to optimize the profile of the SOL current. Longer wavelength modes produce a larger effect because they are not sheared as strongly by the magnetic X-point. Generation of the necessary currents is challenging due to the possibly substantial power requirements and the possible need for internal insulators. We analyze passive current-drive mechanisms that rely on puffing and pumping of neutral gas in a toroidally asymmetric fashion using the UEDGE code to model the ITER divertor.

Joseph, Ilon; Cohen, Ronald H.; Rognlien, Thomas D.; Ryutov, Dmitri D. [Lawrence Livermore National Laboratory, P.O. Box 808, L-637, Livermore, California 94551 (United States)

2012-05-15T23:59:59.000Z

312

Modeling and Control of a Marine Current Turbine Driven Doubly-Fed Induction Generator  

E-Print Network (OSTI)

with the modeling and the control of a variable speed DFIG-based marine current turbine with and without tidal synchronous speed); r = Rotor current frequency (r = s ­ ); = DFIG speed ( = /p); f = Viscosity coefficient; J = Rotor Inertia; p = Pole pair number. GLOSSARY MCT = Marine Current Turbine; DFIG = Doubly

Brest, Université de

313

NREL Controllable Grid Interface for Testing MW-Scale Wind Turbine Generators (Poster)  

DOE Green Energy (OSTI)

In order to understand the behavior of wind turbines experiencing grid disturbances, it is necessary to perform a series of tests and accurate transient simulation studies. The latest edition of the IEC 61400-21 standard describes methods for such tests that include low voltage ride-through (LVRT), active power set-point control, ramp rate limitations, and reactive power capability tests. The IEC methods are being widely adopted on both national and international levels by wind turbine manufacturers, certification authorities, and utilities. On-site testing of wind turbines might be expensive and time consuming since it requires both test equipment transportation and personnel presence in sometimes remote locations for significant periods of time because such tests need to be conducted at certain wind speed and grid conditions. Changes in turbine control software or design modifications may require redoing of all tests. Significant cost and test-time reduction can be achieved if these tests are conducted in controlled laboratory environments that replicate grid disturbances and simulation of wind turbine interactions with power systems. Such testing capability does not exist in the United States today. An initiative by NREL to design and construct a 7-MVA grid simulator to operate with the existing 2.5 MW and new upcoming 5-MW dynamometer facilities will fulfill this role and bring many potential benefits to the U.S. wind industry with the ultimate goal of reducing wind energy integration costs.

McDade, M.; Gevorgian, V.; Wallen, R.; Erdman, W.

2013-04-01T23:59:59.000Z

314

An automatic water management system for large-scale rice paddy fields  

Science Conference Proceedings (OSTI)

An automatic water management system for large-scale paddy fields has been developed. The purposes of that are to supply the paddy fields with water or drain water from that automatically, to decrease water consumption, and to have a good harvest. To ... Keywords: estimating mean water level, optimal water allocation, paddy field, predict field consumption, prediction of growth stages, water level control

Teruji Sekozawa

2010-10-01T23:59:59.000Z

315

Automatic flue gas heat recovery system  

Science Conference Proceedings (OSTI)

An automatic flue gas heat recovery system for supplementing or replacing a conventional, separate hot water system. In the example described, the heat recovery system is applied to a pizza restaurant where large quantities of heat energy are normally wasted up an oven chimney stack, and large quantities of hot water also are required for restaurant operations. An electric motor driven pump circulates water in a closed loop between a storage tank and a heat exchanger tube located in the oven chimney stack. A thermostat control automatically starts the pump when the oven heats the chimney stack to an effective water heating temperature. When temperature in the storage tank reaches a predetermined maximum, the thermostat control stops the pump, opens a drain valve, and dumps water quickly and completely from the heat exchanger tube. Three different embodiments are shown and described illustrating systems with one or more storage tanks and one or more pumps. In the plural storage tank embodiments, an existing hot water heating tank may be converted for use to augment a main tank supplied with the present system.

Whalen, D.A.

1983-02-22T23:59:59.000Z

316

Hybrid Automatic Meter Reading System  

Science Conference Proceedings (OSTI)

In Malaysia, Tenaga Nasional Berhad (TNB) as the power utility company have two methods to take the metering data from their customer. For their ordinary customers (OPC, Ordinary Power Customer), they used conventional method, by sending meter-readers ... Keywords: Automatic Meter Reading, ZigBee, GSM

Aryo Handoko Primicanta; Mohd Yunus Nayan; Mohammad Awan

2009-11-01T23:59:59.000Z

317

The Evaluation of Mercury Emissions and Control Options for Ontario Power Generation Nanticoke Station  

Science Conference Proceedings (OSTI)

Canada-wide standards for mercury are being developed, and draft requirements will likely be available in 2002 (with a revised version by 2005) for potential implementation in the 2007 to 2010 period. Mercury emissions from coal-fired power plants are also likely to be subjected to regulatory control. The U.S. Environmental Protection Agency (EPA) is developing proposed mercury regulations and plans to issue final regulations on mercury emissions from coal-fired boilers by December 15, 2004 for full comp...

2002-08-13T23:59:59.000Z

318

Control of cascaded induction-generator systems. Final technical report, 1 September 1983-30 August 1984  

SciTech Connect

This report documents an investigation of the stability and control of cascaded doubly fed machines (CDFM). These machines are brushless variable-speed constant-frequency electric power generators with potential for application in aircraft. A previous analytical study indicated the CDFM system would be controllable in the subsynchronous operating mode with a passive RL load. The present study contains two steps. First is an investigation of the machine operation in the supersynchronous mode. The second step is an investigation of machine operation with output capacitors providing excitation VARs for the machine and load. Step 1 results show that the machines exhibit stability characteristics in the supersynchronous mode similar to those observed in the subsynchronous mode. Step 2 results show that output capacitors degrade the system performance, particularly at light loads. The results show that output current feedback can be employed to improve the system performance.

Ortmeyer, T.H.

1984-12-13T23:59:59.000Z

319

Safe and automatic live update for operating systems  

Science Conference Proceedings (OSTI)

Increasingly many systems have to run all the time with no downtime allowed. Consider, for example, systems controlling electric power plants and e-banking servers. Nevertheless, security patches and a constant stream of new operating system versions ... Keywords: automatic updates, live update, operating systems, state checking, state transfer, update safety

Cristiano Giuffrida; Anton Kuijsten; Andrew S. Tanenbaum

2013-04-01T23:59:59.000Z

320

Automatic visual guidance of a forklift engaging a pallet  

Science Conference Proceedings (OSTI)

This paper presents the development of a prototype vision-guided forklift system for the automatic engagement of pallets. The system is controlled using the visual guidance method of mobile camera-space manipulation, which is capable of achieving a high ... Keywords: Machine vision, Mobile manipulation, Visual guidance

Michael Seelinger; John-David Yoder

2006-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

Automatic recognition of personality in conversation  

Science Conference Proceedings (OSTI)

The identification of personality by automatic analysis of conversation has many applications in natural language processing, from leader identification in meetings to partner matching on dating websites. We automatically train models of the main five ...

François Mairesse; Marilyn Walker

2006-06-01T23:59:59.000Z

322

Comparison on control strategies of the grid-side converter of variable speed constant frequency doubly-fed wind power generation system  

Science Conference Proceedings (OSTI)

Direct power control, vector control based on d-q synchronous rotating reference frame and ?-? static reference frame for the grid-side converter of variable speed constant frequency doubly-fed wind turbines are analyzed. System simulation ... Keywords: ?-? static reference frame, d-q rotating reference frame, direct power control, doubly-fed wind power generation system, grid-side converter

Xian-Ming Zhou; Ting-Long Pan; Zhi-Cheng Ji

2009-06-01T23:59:59.000Z

323

Rapid automatic keyword extraction for information retrieval ...  

Methods and systems for rapid automatic keyword extraction for information retrieval and analysis. Embodiments can include parsing words in an ...

324

Surface area generation and droplet size control in solvent extraction systems utilizing high intensity electric fields  

DOE Patents (OSTI)

A method and system for solvent extraction where droplets are shattered by a high intensity electric field. These shattered droplets form a plurality of smaller droplets which have a greater combined surface area than the original droplet. Dispersion, coalescence and phase separation are accomplished in one vessel through the use of the single pulsing high intensity electric field. Electric field conditions are chosen so that simultaneous dispersion and coalescence are taking place in the emulsion formed in the electric field. The electric field creates a large amount of interfacial surface area for solvent extraction when the droplet is disintegrated and is capable of controlling droplet size and thus droplet stability. These operations take place in the presence of a counter current flow of the continuous phase.

Scott, Timothy C. (Knoxville, TN); Wham, Robert M. (Oak Ridge, TN)

1988-01-01T23:59:59.000Z

325

AUTOMATIC CALIBRATING SYSTEM FOR PRESSURE TRANSDUCERS  

DOE Patents (OSTI)

An automatic system for calibrating a number of pressure transducers is described. The disclosed embodiment of the invention uses a mercurial manometer to measure the air pressure applied to the transducer. A servo system follows the top of the mercury column as the pressure is changed and operates an analog- to-digital converter This converter furnishes electrical pulses, each representing an increment of pressure change, to a reversible counterThe transducer furnishes a signal at each calibration point, causing an electric typewriter and a card-punch machine to record the pressure at the instant as indicated by the counter. Another counter keeps track of the calibration points so that a number identifying each point is recorded with the corresponding pressure. A special relay control system controls the pressure trend and programs the sequential calibration of several transducers.

Amonette, E.L.; Rodgers, G.W.

1958-01-01T23:59:59.000Z

326

Automatic tuning for linearly tunable filter  

E-Print Network (OSTI)

A new tuning scheme for linearly tunable high-Q filters is proposed. The tuning method is based on using the phase information for both frequency and Q factor tuning. There is no need to find out the relationship between a filter's passband magnitude and Q. A gm-C biquadratic filter is designed to demonstrate the proposed tuning circuitry. The project includes a phase locked loop (PLL) based frequency tuning loop, reference clock generator, and differential difference amplifier (DDA) for dealing with frequency and Q factor tuning loop and linearly tunable second order gm-C bandpass filter. Simulation results for a 10 MHz prototype filter using AMI 0.5?m process is presented. The chip testing results show that the automatic frequency tuning error is 2.5% for the 10 MHz case.

Huang, Sung-Ling

2003-05-01T23:59:59.000Z

327

Advanced techniques for safety analysis applied to the gas turbine control system of ICARO co-generative plant  

E-Print Network (OSTI)

The paper describes two complementary and integrable approaches, a probabilistic one and a deterministic one, based on classic and advanced modelling techniques for safety analysis of complex computer based systems. The probabilistic approach is based on classical and innovative probabilistic analysis methods. The deterministic approach is based on formal verification methods. Such approaches are applied to the gas turbine control system of ICARO co generative plant, in operation at ENEA CR Casaccia. The main difference between the two approaches, behind the underlining different theories, is that the probabilistic one addresses the control system by itself, as the set of sensors, processing units and actuators, while the deterministic one also includes the behaviour of the equipment under control which interacts with the control system. The final aim of the research, documented in this paper, is to explore an innovative method which put the probabilistic and deterministic approaches in a strong relation to overcome the drawbacks of their isolated, selective and fragmented use which can lead to inconsistencies in the evaluation results. 1.

Ro Bologna; Ester Ciancamerla; Piero Incalcaterra; Michele Minichino; Andrea Bobbio; Università Del Piemonte Orientale; Enrico Tronci

2001-01-01T23:59:59.000Z

328

DSOPilot project Automatic receipt of short circuiting indicators (Smart  

Open Energy Info (EERE)

DSOPilot project Automatic receipt of short circuiting indicators (Smart DSOPilot project Automatic receipt of short circuiting indicators (Smart Grid Project) Jump to: navigation, search Project Name DSOPilot project Automatic receipt of short circuiting indicators Country Denmark Coordinates 56.26392°, 9.501785° 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":56.26392,"lon":9.501785,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

329

Automatic design of 3-d fixtures and assembly pallets  

Science Conference Proceedings (OSTI)

This paper presents an implemented algorithm that automatically designs fixtures and assembly pallets to hold three-dimensional parts. All fixtures generated by the algorithm employ round side locators, a side clamp, and cylindrical supports; depending on the value of an input control flag, the fixture may also include swing-arm top clamps. Using these modular elements, the algorithm designs fixtures that rigidly constrain and locate the part, obey task constraints, are robust to part shape variations, are easy to load, and are economical to produce. For the class of fixtures that are considered, the algorithm is guaranteed to find the global optimum design that satisfies these and other pragmatic conditions. The authors present the results of the algorithm applied to several practical manufacturing problems. For these complex problems the algorithm typically returns initial high-quality fixture designs in less than a minute, and identifies the global optimum design in just over an hour. The algorithm is also capable of solving difficult design problems where a single fixture is desired that can hold either of two parts.

Brost, R.C.; Peters, R.R. [Sandia National Labs., Albuquerque, NM (United States). Intelligent Systems and Robotics Center

1997-01-01T23:59:59.000Z

330

Hardware-in-the-loop simulation of pressurized water reactor steam-generator water-level control, designed for use within physically distributed testing environments.  

E-Print Network (OSTI)

??A hardware-in-the-loop model was developed to represent digital sensing and control of steam generator water-level. The model was created with an intention to serve as… (more)

Brink, Michael Joseph

2013-01-01T23:59:59.000Z

331

A composite P&O MPPT control with intelligent orthogonal particle swarm optimization for steepest gradient river current power generation system  

Science Conference Proceedings (OSTI)

This paper proposes a demonstration system of steepest gradient river current (SGRC) power generation with energy storage system. A direct-drive permanent magnet synchronous generator with multiple poles is used to transfer the steepest gradient river ... Keywords: full-bridge DC/DC converter controller, maximum power point tracking (MPPT), orthogonal particle swarm optimization (OPSO), perturbation and observation (P&O) method, steepest gradient river current (SGRC) power generation

Jian-Long Kuo; Chun-Jae Chang

2010-08-01T23:59:59.000Z

332

Autonomous, teleoperated, and shared control of robot systems  

Science Conference Proceedings (OSTI)

This paper illustrates how different modes of operation such as bilateral teleoperation, autonomous control, and shared control can be described and implemented using combinations of modules in the SMART robot control architecture. Telerobotics modes are characterized by different ``grids`` of SMART icons, where each icon represents a portion of run-time code that implements a passive control law. By placing strict requirements on the module`s input-output behavior and using scattering theory to develop a passive sampling technique, a flexible, expandable telerobot architecture is achieved. An automatic code generation tool for generating SMART systems is also described.

Anderson, R.J.

1994-12-31T23:59:59.000Z

333

Structure analysis based parking slot marking recognition for semi-automatic parking system  

Science Conference Proceedings (OSTI)

Semi-automatic parking system is a driver convenience system automating steering control required during parking operation. This paper proposes novel monocular-vision based target parking-slot recognition by recognizing parking-slot markings when driver ...

Ho Gi Jung; Dong Suk Kim; Pal Joo Yoon; Jaihie Kim

2006-08-01T23:59:59.000Z

334

Methods for automatically evaluating answers to complex questions  

E-Print Network (OSTI)

Evaluation is a major driving force in advancing the state of the art in language technologies. In particular, methods for automatically assessing the quality of machine output is the preferred method for measuring progress, provided that these metrics have been validated against human judgments. Following recent developments in the automatic evaluation of machine translation and document summarization, we present a similar approach, implemented in a measure called Pourpre, an automatic technique for evaluating answers to complex questions based on n-gram co-occurrences between machine output and a human-generated answer key. Until now, the only way to assess the correctness of answers to such questions involves manual determination of whether an information “nugget ” appears in a system’s response. The lack of automatic methods for scoring system output is an impediment to progress in the field, which we address with this work. Experiments with the TREC 2003, TREC 2004, and TREC 2005 QA tracks indicate that rankings produced by our metric correlate highly with official rankings, and that Pourpre outperforms direct application of existing metrics. 1

Jimmy Lin; Dina Demner-fushman

2006-01-01T23:59:59.000Z

335

Automatic Commissioning of Multiple VAV Terminals  

E-Print Network (OSTI)

A site survey on a modern operating commercial building screened 261 ineffective VAV (Variable Air Volume) boxes (20.9% of the total boxes in the building) and summarized ten typical faults for VAV air-conditioning system(s) resulting in energy waste, performance degradation or totally out of control. A strategy is developed to automatically check the health condition of VAV terminals and diagnose the faults. Hybrid approach is employed to establish a commissioning and re-commissioning tool of VAV air-conditioning system. Performance indices with expert rules based on system physical characteristics are adopted to detect and diagnose the nine of the ten faults. PCA (Principal Component Analysis) method is developed to detect and diagnose the VAV box flow sensor bias (Fault 10) and to reconstruct the faulty sensors. A multiple VAV fault FDD strategy for a VAV entire system is developed, which is validated in simulation and filed tests.

Qin, J.; Wang, S.

2004-01-01T23:59:59.000Z

336

Automatic Exploration of Datacenter performance Regimes  

E-Print Network (OSTI)

Horizontally scalable Internet services present an opportunity to use automatic resource allocation strategies for system management in the datacenter. In most of the previous work, a controller employs a performance model of the system to make decisions about the optimal allocation of resources. However, these models are usually trained offline or on a small-scale deployment and will not accurately capture the performance of the controlled application. To achieve accurate control of the web application, the models need to be trained directly on the production system and adapted to changes in workload and performance of the application. In this paper we propose to train the performance model using an exploration policy that quickly collects data from different performance regimes of the application. The goal of our approach for managing the exploration process is to strike a balance between not violating the performance SLAs and the need to collect sufficient data to train an accurate performance model, which requires pushing the system close to its capacity. We show that by using our exploration policy, we can train a performance model of a Web 2.0 application in less than an hour and then immediately use the model in a resource allocation controller.

Peter Bodík; Rean Griffith; Charles Sutton; O Fox; Michael I. Jordan; David A. Patterson

2009-01-01T23:59:59.000Z

337

Identification and Testing of Amines for Steam Generator Chemistry and Deposit Control: Part 3: Qualifications of Dodecylamine as an Amine Additive for Steam Generator Fouling Mitigation  

Science Conference Proceedings (OSTI)

This report summarizes an investigation to qualify an amine additive for a pressurized water reactor (PWR) field trial to reduce steam generator (SG) fouling. While the results to date continue to support a field trial, the apparent incompatibility of the amine additive with ion exchange cation resins will be a significant problem for some stations.

2004-12-01T23:59:59.000Z

338

Conceptual clustering of documents for automatic ontology generation  

Science Conference Proceedings (OSTI)

In Information retrieval, Keyword based retrieval is unsatisfactory for user needs since it can't always retrieve relevant words according to the concept. Since different words can represent the same concept (polysemy) and one word can represent different ... Keywords: clustering, feature vector, homonymy, indexing, information retrieval, polysemy, self-organizing map

Reshmy Krishnan, Amir Hussain, Sherimon P.C.

2013-06-01T23:59:59.000Z

339

Predictive chemical kinetics : enabling automatic mechanism generation and evaluation  

E-Print Network (OSTI)

The use of petroleum-based fuels for transportation accounted for more than 25% of the total energy consumed in 2012, both in the United States and throughout the world. The finite nature of world oil reserves and the ...

Allen, Joshua W. (Joshua William)

2013-01-01T23:59:59.000Z

340

Automatic generation of conflict-free IPsec policies  

Science Conference Proceedings (OSTI)

IPsec (IP security) will function correctly only if its security policies satisfy all the requirements. If the security policies cannot meet a set of consistent requirements, we said there are policy conflicts. In this paper, we analyze all situations ...

Chi-Lan Chang; Yun-Peng Chiu; Chin-Laung Lei

2005-10-01T23:59:59.000Z

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


341

Halbach array generator/motor having an automatically ...  

Electricity Transmission; Energy Analysis; Energy Storage; Geothermal; Hydrogen and Fuel Cell; Hydropower, Wave and Tidal; Industrial Technologies; Solar Photovoltaic;

342

Eclat : automatic generation and classification of test inputs  

E-Print Network (OSTI)

This thesis describes a technique that selects, from a large set of test inputs, a small subset likely to reveal faults in the software under test. The technique takes a program or software component, plus a set of correct ...

Pacheco, Carlos, S.M. Massachusetts Institute of Technology

2005-01-01T23:59:59.000Z

343

Synergy Between Automatic Content Generation and Social Media  

E-Print Network (OSTI)

videos, etc. However, when they enter "home schooling" in a search engine, they may only see a general," this module unifies them into one search term to avoid performing redundant searches. Semantic similarity and recent search terms from search engines. The initial retrieval of content that is relevant to the search

Shahriar, Selim

344

This file was generated automatically by the Mathematica front ...  

Science Conference Proceedings (OSTI)

... nt::usage="The transpose of the stoichiometric matrix"; ntprime::usage=" The transpose of the transformed stoichiometric matrix"; ...

345

Caldyne Automatics Limited | Open Energy Information  

Open Energy Info (EERE)

Name Caldyne Automatics Limited Place West Bengal, India Zip 700 091 Sector Solar, Wind energy Product Kolkata-based power storage product manufacturer; also makes lighting...

346

Attacking Automatic Wireless Network Selection  

E-Print Network (OSTI)

Wireless 802.11 networking is becoming so prevalent that many users have become accustomed to having available wireless networks in their workplace, home, and many public places such as airports and coffee shops. Modern client operating systems implement automatic wireless network discovery and known network identification to facilitate wireless networking for the end-user. In order to implement known network discovery, client operating systems remember past wireless networks that have been joined and automatically look for these networks (referred to as Preferred or Trusted Networks) whenever the wireless network adapter is enabled. By examining these implementations in detail, we have discovered previously undisclosed vulnerabilities in the implementation of these algorithms under the two most prevalent client operating systems, Windows XP and MacOS X. With custom base station software, an attacker may cause clients within wireless radio range to associate to the attacker’s wireless network without user interaction or notification. This will occur even if the user has never connected to a wireless network before or they have an empty Preferred/Trusted Networks List. We describe these vulnerabilities as well as their implementation and impact. 1

Dino A. Dai Zovi; Shane A. Macaulay

2005-01-01T23:59:59.000Z

347

Plasma generators, reactor systems and related methods  

SciTech Connect

A plasma generator, reactor and associated systems and methods are provided in accordance with the present invention. A plasma reactor may include multiple sections or modules which are removably coupled together to form a chamber. Associated with each section is an electrode set including three electrodes with each electrode being coupled to a single phase of a three-phase alternating current (AC) power supply. The electrodes are disposed about a longitudinal centerline of the chamber and are arranged to provide and extended arc and generate an extended body of plasma. The electrodes are displaceable relative to the longitudinal centerline of the chamber. A control system may be utilized so as to automatically displace the electrodes and define an electrode gap responsive to measure voltage or current levels of the associated power supply.

Kong, Peter C. (Idaho Falls, ID); Pink, Robert J. (Pocatello, ID); Lee, James E. (Idaho Falls, ID)

2007-06-19T23:59:59.000Z

348

Modern generator protection systems  

SciTech Connect

The special problems of the protection of generating stations with large machines connected to large integrated networks are presented. The coordination between the protective relays and tripping functions and the reliability of the protection scheme are important considerations in modern plants. Primary and backup protective functions, the applications, and their divisions into fault detection and ''fault prevention'' categories are considered. Testing and maintenance of the generator protection system including automatic calibration testing equipment is also discussed. The concept of the generator protection as a completely coordinated system and its realization with solid state protective relays is also presented. 9 refs.

Pencinger, C.J.

1981-01-01T23:59:59.000Z

349

Automatic script identification from images using cluster-based templates  

SciTech Connect

We have developed a technique for automatically identifying the script used to generate a document that is stored electronically in bit image form. Our approach differs from previous work in that the distinctions among scripts are discovered by an automatic learning procedure, without any handson analysis. We first develop a set of representative symbols (templates) for each script in our database (Cyrillic, Roman, etc.). We do this by identifying all textual symbols in a set of training documents, scaling each symbol to a fixed size, clustering similar symbols, pruning minor clusters, and finding each cluster`s centroid. To identify a new document`s script, we identify and scale a subset of symbols from the document and compare them to the templates for each script. We choose the script whose templates provide the best match. Our current system distinguishes among the Armenian, Burmese, Chinese, Cyrillic, Ethiopic, Greek, Hebrew, Japanese, Korean, Roman, and Thai scripts with over 90% accuracy.

Hochberg, J.; Kerns, L.; Kelly, P.; Thomas, T.

1995-02-01T23:59:59.000Z

350

Generation of test data structures using constraint logic programming  

Science Conference Proceedings (OSTI)

The goal of Bounded-Exhaustive Testing (BET) is the automatic generation of all the test cases satisfying a given invariant, within a given bound. When the input has a complex structure, the development of correct and efficient generators becomes ...

Valerio Senni; Fabio Fioravanti

2012-05-01T23:59:59.000Z

351

Solar Pilot Plant, Phase I. Preliminary design report. Volume VI. Electrical power generation; master control subsystems; balance of plant CDRL item 2  

DOE Green Energy (OSTI)

The Honeywell electrical power generation subsystem centers on a General Electric dual admission, triple extraction turbine generator sized to the output requirements of the Pilot Plant. The turbine receives steam from the receiver subsystem and/or the thermal storage subsystem and supplies those subsystems with feedwater. The turbine condensor is wet cooled. The plant control system consists of a coordinated digital master and subsystem digital/analog controls. The remainder of the plant, work spaces, maintenance areas, roads, and reception area are laid out to provide maximum convenience compatible with utility and safety. Most of the activities are housed in a complex around the base of the receiver tower. This volume contains a description of the relationship of the electrical power generation subsystem to the rest of the plant, the design methodology and evolution, the interface integration and control, and the operation and maintenance procedures.

None

1977-05-01T23:59:59.000Z

352

Characterization of coal-water slurry fuel sprays generated by an electronically-controlled accumulator fuel injector  

E-Print Network (OSTI)

Experiments have been completed to characterize coal-water slurry sprays generated by an electronically-controlled accumulator fuel injection system for a diesel engine. The sprays were injected into a pressurized chamber equipped with quartz windows. High speed movies, detailed data for fuel line pressures and needle lift signals were obtained as a function of time, orifice diameter, coal loading, gas density in the chamber, and accumulator fuel pressure. For the base case conditions (50% by mass) coal loading, 0.4 mm diameter nozzle hole, coal-water slurry pressure of 82 MPa (12,000 psi), and a chamber density of 25 kg/m'), the break-up time was 0.30 msec. An empirical correlation for both spray tip penetration and initial jet velocity was developed. For the base case conditions, the spray tip penetration and initial jet velocity were 15% greater for coal water slurry than for diesel fuel or water. Results of this research and the correlation are specific to the tested coal-water slurry.

Payne, Stephen Ellis

1993-01-01T23:59:59.000Z

353

OpenAD/F: Automatic Differentiation of Fortran Codes | Argonne National  

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

OpenAD/F: Automatic Differentiation of Fortran Codes OpenAD/F: Automatic Differentiation of Fortran Codes OpenAD/F: Automatic Differentiation of Fortran Codes The OpenAD/F project seeks to develop a modular, open-source tool for the automatic generation of adjoint code from Fortran 95 source code. Discrete adjoint computations are used for sensitivity analysis and to provide the gradients used in geophysical state estimation. Because derivatives are needed with respect to millions or billions of independent variables, finite different approximations are impractical: a gradient computation that would take minutes or hours using an adjoint computation would take months or years using finite differences. Project Contact Jean Utke Paul Hovland Other Contributors Patrick Heimbach Chris Hill Carl Wunsch Funding Sources

354

Automatic Mechetronic Wheel Light Device  

SciTech Connect

A wheel lighting device for illuminating a wheel of a vehicle to increase safety and enhance aesthetics. The device produces the appearance of a "ring of light" on a vehicle's wheels as the vehicle moves. The "ring of light" can automatically change in color and/or brightness according to a vehicle's speed, acceleration, jerk, selection of transmission gears, and/or engine speed. The device provides auxiliary indicator lights by producing light in conjunction with a vehicle's turn signals, hazard lights, alarm systems, and etc. The device comprises a combination of mechanical and electronic components and can be placed on the outer or inner surface of a wheel or made integral to a wheel or wheel cover. The device can be configured for all vehicle types, and is electrically powered by a vehicle's electrical system and/or battery.

Khan, Mohammed John Fitzgerald (Silver Spring, MD)

2004-09-14T23:59:59.000Z

355

Automatic Mechetronic Wheel Light Device  

DOE Patents (OSTI)

A wheel lighting device for illuminating a wheel of a vehicle to increase safety and enhance aesthetics. The device produces the appearance of a "ring of light" on a vehicle's wheels as the vehicle moves. The "ring of light" can automatically change in color and/or brightness according to a vehicle's speed, acceleration, jerk, selection of transmission gears, and/or engine speed. The device provides auxiliary indicator lights by producing light in conjunction with a vehicle's turn signals, hazard lights, alarm systems, and etc. The device comprises a combination of mechanical and electronic components and can be placed on the outer or inner surface of a wheel or made integral to a wheel or wheel cover. The device can be configured for all vehicle types, and is electrically powered by a vehicle's electrical system and/or battery.

Khan, Mohammed John Fitzgerald (Silver Spring, MD)

2004-09-14T23:59:59.000Z

356

Automatic learning of subclasses of pattern languages  

Science Conference Proceedings (OSTI)

Automatic classes are classes of languages for which a finite automaton can decide the membership problem for the languages in the class, in a uniform way, given an index for the language. For alphabet size of at least 4, every automatic class of erasing ...

John Case; Sanjay Jain; Trong Dao Le; Yuh Shin Ong; Pavel Semukhin; Frank Stephan

2012-09-01T23:59:59.000Z

357

Automatic camera tracking for remote manipulators  

SciTech Connect

The problem of automatic camera tracking of mobile objects is addressed with specific reference to remote manipulators and using either fixed or mobile cameras. The technique uses a kinematic approach employing 4 x 4 coordinate transformation matrices to solve for the needed camera PAN and TILT angles. No vision feedback systems are used, as the required input data are obtained entirely from position sensors from the manipulator and the camera-positioning system. All hardware requirements are generally satisfied by currently available remote manipulator systems with a supervisory computer. The system discussed here implements linear plus on/off (bang-bang) closed-loop control with a +-2-deg deadband. The deadband area is desirable to avoid operator seasickness caused by continuous camera movement. Programming considerations for camera control, including operator interface options, are discussed. The example problem presented is based on an actual implementation using a PDP 11/34 computer, a TeleOperator Systems SM-229 manipulator, and an Oak Ridge National Laboratory (ORNL) camera-positioning system. 3 references, 6 figures, 2 tables.

Stoughton, R.S.; Martin, H.L.; Bentz, R.R.

1984-07-01T23:59:59.000Z

358

Automatic camera tracking for remote manipulators  

Science Conference Proceedings (OSTI)

The problem of automatic camera tracking of mobile objects is addressed with specific reference to remote manipulators and using either fixed or mobile cameras. The technique uses a kinematic approach employing 4 x 4 coordinate transformation matrices to solve for the needed camera PAN and TILT angles. No vision feedback systems are used, as the required input data are obtained entirely from position sensors from the manipulator and the camera-positioning system. All hardware requirements are generally satisfied by currently available remote manipulator systems with a supervisory computer. The system discussed here implements linear plus on/off (bang-bang) closed-loop control with a +-2/sup 0/ deadband. The deadband area is desirable to avoid operator seasickness caused by continuous camera movement. Programming considerations for camera control, including operator interface options, are discussed. The example problem presented is based on an actual implementation using a PDP 11/34 computer, a TeleOperator Systems SM-229 manipulator, and an Oak Ridge National Laboratory (ORNL) camera-positioning system. 3 references, 6 figures, 2 tables.

Stoughton, R.S.; Martin, H.L.; Bentz, R.R.

1984-04-01T23:59:59.000Z

359

Control strategies of doubly fed induction generator-based wind turbine system with new rotor current protection topology  

Science Conference Proceedings (OSTI)

A protection scheme of a doubly fed induction generator (DFIG) based wind turbine system during faults is crowbar activation. With this protection

Jackson John Justo; Kyoung-Soo Ro

2012-01-01T23:59:59.000Z

360

Modeling, analysis, control and design application guidelines of doubly fed induction generator (DFIG) for wind power applications.  

E-Print Network (OSTI)

??Double Fed Induction Generators (DFIG) has been widely used for the past two decades in large wind farms. However, there are many open-ended problems yet… (more)

Masaud, Tarek

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

Air Pollution Control Regulations: No. 13- Particulate Emissions from Fossil Fuel Fired Steam or Hot Water Generating Units (Rhode Island)  

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

The purpose of this regulation is to limit emissions of particulate matter from fossil fuel fired and wood-fired steam or hot water generating units.

362

Novel Control of PV Solar and Wind Farm Inverters as STATCOM for Increasing Connectivity of Distributed Generators.  

E-Print Network (OSTI)

??The integration of distributed generators (DGs) such as wind farms and PV solar farms in distribution networks is getting severely constrained due to problems of… (more)

AC, Mahendra

2013-01-01T23:59:59.000Z

363

APSTNG: Associated particle sealed-tube neutron generator studies for arms control. Final report on NN-20 Project ST220  

SciTech Connect

Argonne National Laboratory has performed research and development on the use of Associated Particle Sealed-Tube Neutron Generator (APSTNG) technology for treaty verification and non-proliferation applications, under funding from the DOE Office of Nonproliferation and National Security. Results indicate that this technology has significant potential for nondestructively detecting elemental compositions inside inspected objects or volumes. The final phase of this project was placement of an order for commercial procurement of an advanced sealed tube, with its high-voltage supply and control systems. Procurement specifications reflected lessons learned during the study. The APSTNG interrogates a volume with a continuous 14-MeV neutron flux. Each neutron is emitted coincident with an {open_quotes}associated{close_quotes} alpha-particle emitted in the opposite direction. Thus detection of an alpha-particle marks the emission of a neutron in a cone opposite to that defined by the alpha detector. Detection of a gamma ray coincident with the alpha indicates that the gamma was emitted from a neutron-induced reaction inside the neutron cone: the gamma spectra can be used to identify fissionable materials and many isotopes having an atomic number larger than that of boron. The differences in gamma-ray and alpha-particle detection times yield a coarse measurement of the distance along the cone axis from the APSTNG emitter to each region containing the identified nuclide. A position-sensitive alpha detector would permit construction of coarse three-dimensional images. The source and emission-detection systems can be located on the same side of the interrogated volume. The neutrons and gamma rays are highly penetrating. A relatively high signal-to-background ratio allows the use of a relatively small neutron source and conventional electronics.

Rhodes, E.; Dickerman, C.E.; Brunner, T.; Hess, A.; Tylinski, S.

1994-12-01T23:59:59.000Z

364

Method and apparatus for set point control for steam temperatures for start-up of the turbine and steam generator in unit power plants  

SciTech Connect

A method and apparatus are described for controlling the set point for steam temperatures for cold start-up of a steam generator-turbine unit wherein inlet steam temperature and turbine load absorption are steadily and substantially simultaneously increased in accordance with a predetermined relationship so as to reach their final values substantially synchronously.

Bloch, H.; Salm, M.

1978-05-23T23:59:59.000Z

365

Control of a wind park with doubly fed induction generators in support of power system stability in case of grid faults  

E-Print Network (OSTI)

(DFIG) con- cept, which facilitates fault ride through of large DFIG wind farms and enables them, that the here presented control strategy of DFIG wind parks even facilitates a fault ride through of nearby parks based on the doubly fed induc- tion generator (DFIG) concept, which facilitates fault ride through

366

Modeling and Control System Design for an Integrated Solar Generation and Energy Storage System with a Ride-Through Capability: Preprint  

DOE Green Energy (OSTI)

This paper presents a generic approach for PV panel modeling. Data for this modeling can be easily obtained from manufacturer datasheet, which provides a convenient way for the researchers and engineers to investigate the PV integration issues. A two-stage power conversion system (PCS) is adopted in this paper for the PV generation system and a Battery Energy Storage System (BESS) can be connected to the dc-link through a bi-directional dc/dc converter. In this way, the BESS can provide some ancillary services which may be required in the high penetration PV generation scenario. In this paper, the fault ride-through (FRT) capability is specifically focused. The integrated BESS and PV generation system together with the associated control systems is modeled in PSCAD and Matlab platforms and the effectiveness of the controller is validated by the simulation results.

Wang, X.; Yue, M.; Muljadi, E.

2012-09-01T23:59:59.000Z

367

Solar-powered aroma generator  

SciTech Connect

In combination with a switch-controlled electric light bulb having a threaded plug and a threaded socket disposed in a room which is also subject to natural ambient light, a switchless aroma generator is installed in the room which is automatically activated only when the electric light bulb is switched on. The activated generator functions to discharge an air current into the room which conveys an aromatic vapor to modify the atmosphere. The generator described in this patent consists of: A.) an air-permeable cartridge containing an aroma supply which is exuded into the atmosphere at a relatively rapid rate as an air current is forced through the cartridge; B.) a fan driven by a low-voltage, direct-current motor having predetermined power requirements, the fan being arranged to force an air current through the cartridge; C.) a housing incorporating the cartridge and the motordriven fan, the housing containing an apparatus for mounting it on a wall in the room; and D.) a solar cell assembly producing a direct-current output placed in close proximity to the bulb in the room and irradiated when the bulb is switched on. The assembly is connected to the motor to supply power, the electrical relationship of the assembly to the motor being such that the cell output is sufficient to power the motor only when the bulb is switched on to irradiate the assembly, and is insufficient when the bulb is switched off. The cell output then depends on ambient light in the room, and the operation of the generator is coordinated with that of the bulb despite the absence of a wired connection between and an aroma is generated only when the bulb is switched on.

Spector, D.

1986-02-04T23:59:59.000Z

368

CERTS 2012 Program Review - Automatic Reliability Reports (ARR...  

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

prototype at MISO: Architecture, Grid Monitoring Visualization and Grid Reliability Tracking Grid Automatic Reliability Report (GARR) Page 1 Automatic Reliability Reports (ARR)...

369

Program Your Thermostat for Automatic Savings | Department of...  

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

Program Your Thermostat for Automatic Savings Program Your Thermostat for Automatic Savings December 23, 2008 - 4:00am Addthis Allison Casey Senior Communicator, NREL Did you know...

370

Automated manual transmission controller  

DOE Patents (OSTI)

A powertrain system for a hybrid vehicle. The hybrid vehicle includes a heat engine, such as a diesel engine, and an electric machine, which operates as both an electric motor and an alternator, to power the vehicle. The hybrid vehicle also includes a manual-style transmission configured to operate as an automatic transmission from the perspective of the driver. The engine and the electric machine drive an input shaft which in turn drives an output shaft of the transmission. In addition to driving the transmission, the electric machine regulates the speed of the input shaft in order to synchronize the input shaft during either an upshift or downshift of the transmission by either decreasing or increasing the speed of the input shaft. When decreasing the speed of the input shaft, the electric motor functions as an alternator to produce electrical energy which may be stored by a storage device. Operation of the transmission is controlled by a transmission controller which receives input signals and generates output signals to control shift and clutch motors to effect smooth launch, upshift shifts, and downshifts of the transmission, so that the transmission functions substantially as an automatic transmission from the perspective of the driver, while internally substantially functioning as a manual transmission.

Lawrie, Robert E. (Whitmore Lake, MI); Reed, Jr., Richard G. (Royal Oak, MI); Bernier, David R. (Rochester Hills, MI)

1999-12-28T23:59:59.000Z

371

Automatic inspection system for nuclear fuel pellets or rods  

DOE Patents (OSTI)

An automatic inspection system is provided for determining surface defects on cylindrical objects such as nuclear fuel pellets or rods. The active element of the system is a compound ring having a plurality of pneumatic jet units directed into a central bore. These jet units are connected to provide multiple circuits, each circuit being provided with a pressure sensor. The outputs of the sensors are fed to a comparator circuit whereby a signal is generated when the difference of pressure between pneumatic circuits, caused by a defect, exceeds a pre-set amount. This signal may be used to divert the piece being inspected into a "reject" storage bin or the like.

Miller, Jr., William H. (Oak Ridge, TN); Sease, John D. (Knoxville, TN); Hamel, William R. (Concord, TN); Bradley, Ronnie A. (Oak Ridge, TN)

1978-01-01T23:59:59.000Z

372

Central receiver solar thermal power system, Phase 1. CDRL item 2. Pilot plant preliminary design report. Volume VI. Electrical power generation and master control subsystems and balance of plant  

DOE Green Energy (OSTI)

The requirements, performance, and subsystem configuration for both the Commercial and Pilot Plant electrical power generation subsystems (EPGS) and balance of plants are presented. The EPGS for both the Commercial Plant and Pilot Plant make use of conventional, proven equipment consistent with good power plant design practices in order to minimize risk and maximize reliability. The basic EPGS cycle selected is a regenerative cycle that uses a single automatic admission, condensing, tandem-compound double-flow turbine. Specifications, performance data, drawings, and schematics are included. (WHK)

Hallet, Jr., R. W.; Gervais, R. L.

1977-10-01T23:59:59.000Z

373

Ekofisk automatic GPS subsidence measurements  

Science Conference Proceedings (OSTI)

A fully automatic GPS satellite-based procedure for the reliable measurement of subsidence of several platforms in almost real time is described. Measurements are made continuously on platforms in the North Sea Ekofisk Field area. The procedure also yields rate measurements, which are also essential for confirming platform safety, planning of remedial work, and verification of subsidence models. GPS measurements are more attractive than seabed pressure-gauge-based platform subsidence measurements-they are much cheaper to install and maintain and not subject to gauge drift. GPS measurements were coupled to oceanographic quantities such as the platform deck clearance, which leads to less complex offshore survey procedures. Ekofisk is an oil and gas field in the southern portion of the Norwegian North Sea. Late in 1984, it was noticed that the Ekofisk platform decks were closer to the sea surface than when the platforms were installed-subsidence was the only logical explanation. After the subsidence phenomenon was recognized, an accurate measurement method was needed to measure progression of subsidence and the associated subsidence rate. One available system for which no further development was needed, was the NAVSTAR GPS-measurements started in March 1985.

Mes, M.J. [Phillips Petroleum Co., Tananger (Norway); Landau, H.; Luttenberger, C. [TerraSat GmbH, Hoehenkirchen-Sieghertsbrumm (Germany)

1996-10-01T23:59:59.000Z

374

Automatic annotation of geographic maps  

Science Conference Proceedings (OSTI)

In this paper, we describe an approach to generate semantic descriptions of entities in city maps so that they can be presented through accessible interfaces. The solution we present processes bitmap images containing city map excerpts. Regions of interest ...

Mirko Horstmann; Wilko Heuten; Andrea Miene; Susanne Boll

2006-07-01T23:59:59.000Z

375

Automatic music performance with computers  

Science Conference Proceedings (OSTI)

Developments of the Utah?BYU music project which have culminated in the design and implementation of a portable computer?driven music?generating system capable of interpretive playing of transcribed musical scores will be discussed

A. C. Ashton; R. F. Bennion

1979-01-01T23:59:59.000Z

376

Modeling, control, and power management of a power electrical system including two distributed generators based on fuel cell and supercapacitor  

Science Conference Proceedings (OSTI)

This paper focuses on Distributed Generator (DG) integration in Power Electrical System (PES) for dispersed nodes. The main objective of the DG use can be classified into two aspects: a load following service and ancillary service systems. In this study

2013-01-01T23:59:59.000Z

377

Air Pollution Control Regulations: No. 43- General Permits for Smaller-Scale Electric Generation Facilities (Rhode Island)  

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

This rule applies to any generator that: (a) has a heat input capacity of 350,000 Btus or more per hour or, in the case of internal combustion engines, is 50 HP or larger; and, (b) is not subject...

378

Analysis of supercritical CO{sub 2} cycle control strategies and dynamic response for Generation IV Reactors.  

Science Conference Proceedings (OSTI)

The analysis of specific control strategies and dynamic behavior of the supercritical carbon dioxide (S-CO{sub 2}) Brayton cycle has been extended to the two reactor types selected for continued development under the Generation IV Nuclear Energy Systems Initiative; namely, the Very High Temperature Reactor (VHTR) and the Sodium-Cooled Fast Reactor (SFR). Direct application of the standard S-CO{sub 2} recompression cycle to the VHTR was found to be challenging because of the mismatch in the temperature drop of the He gaseous reactor coolant through the He-to-CO{sub 2} reactor heat exchanger (RHX) versus the temperature rise of the CO{sub 2} through the RHX. The reference VHTR features a large temperature drop of 450 C between the assumed core outlet and inlet temperatures of 850 and 400 C, respectively. This large temperature difference is an essential feature of the VHTR enabling a lower He flow rate reducing the required core velocities and pressure drop. In contrast, the standard recompression S-CO{sub 2} cycle wants to operate with a temperature rise through the RHX of about 150 C reflecting the temperature drop as the CO{sub 2} expands from 20 MPa to 7.4 MPa in the turbine and the fact that the cycle is highly recuperated such that the CO{sub 2} entering the RHX is effectively preheated. Because of this mismatch, direct application of the standard recompression cycle results in a relatively poor cycle efficiency of 44.9%. However, two approaches have been identified by which the S-CO{sub 2} cycle can be successfully adapted to the VHTR and the benefits of the S-CO{sub 2} cycle, especially a significant gain in cycle efficiency, can be realized. The first approach involves the use of three separate cascaded S-CO{sub 2} cycles. Each S-CO{sub 2} cycle is coupled to the VHTR through its own He-to-CO{sub 2} RHX in which the He temperature is reduced by 150 C. The three respective cycles have efficiencies of 54, 50, and 44%, respectively, resulting in a net cycle efficiency of 49.3 %. The other approach involves reducing the minimum cycle pressure significantly below the critical pressure such that the temperature drop in the turbine is increased while the minimum cycle temperature is maintained above the critical temperature to prevent the formation of a liquid phase. The latter approach also involves the addition of a precooler and a third compressor before the main compressor to retain the benefits of compression near the critical point with the main compressor. For a minimum cycle pressure of 1 MPa, a cycle efficiency of 49.5% is achieved. Either approach opens up the door to applying the SCO{sub 2} cycle to the VHTR. In contrast, the SFR system typically has a core outlet-inlet temperature difference of about 150 C such that the standard recompression cycle is ideally suited for direct application to the SFR. The ANL Plant Dynamics Code has been modified for application to the VHTR and SFR when the reactor side dynamic behavior is calculated with another system level computer code such as SAS4A/SYSSYS-1 in the SFR case. The key modification involves modeling heat exchange in the RHX, accepting time dependent tabular input from the reactor code, and generating time dependent tabular input to the reactor code such that both the reactor and S-CO{sub 2} cycle sides can be calculated in a convergent iterative scheme. This approach retains the modeling benefits provided by the detailed reactor system level code and can be applied to any reactor system type incorporating a S-CO{sub 2} cycle. This approach was applied to the particular calculation of a scram scenario for a SFR in which the main and intermediate sodium pumps are not tripped and the generator is not disconnected from the electrical grid in order to enhance heat removal from the reactor system thereby enhancing the cooldown rate of the Na-to-CO{sub 2} RHX. The reactor side is calculated with SAS4A/SASSYS-1 while the S-CO{sub 2} cycle is calculated with the Plant Dynamics Code with a number of iterations over a timescale of 500 seconds. It is found that the RHX u

Moisseytsev, A.; Sienicki, J. J. (Nuclear Engineering Division)

2011-04-12T23:59:59.000Z

379

Automatic phonetic transcription by phonological derivation  

Science Conference Proceedings (OSTI)

Automatic phonetic transcription tools usually perform phonetic transcriptions directly from orthographic representations. Although these approaches often achieve good results, theoretical studies suggest that including morphophonological knowledge allows ... Keywords: galician, grapheme-to-phoneme, phonetics, phonology, portuguese

Marcos Garcia; Isaac J. González

2012-04-01T23:59:59.000Z

380

Automatic verification of competitive stochastic systems  

Science Conference Proceedings (OSTI)

We present automatic verification techniques for the modelling and analysis of probabilistic systems that incorporate competitive behaviour. These systems are modelled as turn-based stochastic multi-player games, in which the players can either collaborate ...

Taolue Chen; Vojt?ch Forejt; Marta Kwiatkowska; David Parker; Aistis Simaitis

2012-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

Pronunciation learning for automatic speech recognition  

E-Print Network (OSTI)

In many ways, the lexicon remains the Achilles heel of modern automatic speech recognizers (ASRs). Unlike stochastic acoustic and language models that learn the values of their parameters from training data, the baseform ...

Badr, Ibrahim

2011-01-01T23:59:59.000Z

382

A System to Mark Programs Automatically  

Science Conference Proceedings (OSTI)

This paper describes a system to automatically mark student programs. It is a real time examination system that provides an environment for the compilation and execution of software and then marks it according to criteria and solutions provided by the ...

Ken Ngo-Pham; John Bigham; Julian Rodaway; Laurissa Tokarchuk

2005-09-01T23:59:59.000Z

383

Temporal Sampling Requirements for Automatic Rain Gauges  

Science Conference Proceedings (OSTI)

Automatic rain gauges are needed to obtain rainfall statistics from remote locations and platforms. Many of these platforms cannot be serviced regularly, thus requiring unattended operations for many months. At such locations there is often a ...

Jeffrey A. Nystuen

1998-12-01T23:59:59.000Z

384

Automatically learning qualia structures from the web  

Science Conference Proceedings (OSTI)

Qualia Structures have many applications within computational linguistics, but currently there are no corresponding lexical resources such as WordNet or FrameNet. This paper presents an approach to automatically learn qualia structures for nominals from ...

Philipp Cimiano; Johanna Wenderoth

2005-06-01T23:59:59.000Z

385

The FLOWS Automatic Weather Station Network  

Science Conference Proceedings (OSTI)

This report describes in detail the FLOWS (FAA-Lincoln Laboratory Operational Weather Studies) automatic weather station network which is being used in the Terminal Doppler Weather Radar program to assess the radar detectability of wind shear and ...

Marilyn M. Wolfson

1989-04-01T23:59:59.000Z

386

Automatic wrappers for large scale web extraction  

Science Conference Proceedings (OSTI)

We present a generic framework to make wrapper induction algorithms tolerant to noise in the training data. This enables us to learn wrappers in a completely unsupervised manner from automatically and cheaply obtained noisy training data, e.g., using ...

Nilesh Dalvi; Ravi Kumar; Mohamed Soliman

2011-01-01T23:59:59.000Z

387

Real web community based automatic image annotation  

Science Conference Proceedings (OSTI)

Automatic image annotation is a challenging problem in pattern recognition. Large annotation databases are difficult to build, and the existing models can only label small scale of image sets. In order to solve the problems with the annotation of large ...

Xiao Ke, Shaozi Li, Guolong Chen

2013-04-01T23:59:59.000Z

388

Automatic Planning of Manipulator Transfer Movements  

E-Print Network (OSTI)

This paper deals with the class of problems that involve finding where to place or how to move a solid object in the presence of obstacles. The solution to this class of problems is essential to the automatic planning ...

Lozano-Perez, Tomas

1980-12-01T23:59:59.000Z

389

Automatic welding comes of age. [Offshore  

SciTech Connect

Automatic pipe welding systems today fall into three main categories: gas metal arc welding, gas-tungsten arc welding, and flash-butt welding. The first automatic welding devices used offshore were the CRC and H.C. Price systems. Both use gas metal arc welding with a consumable steel filler wire. The recently developed McDermott flash-butt welding system is described. (DLC)

Turner, D.L. Jr.

1981-07-01T23:59:59.000Z

390

Automatically verifying an object-oriented specification of the steam-boiler system  

Science Conference Proceedings (OSTI)

Correctness is a desired property of industrial software systems. Although the employment of formal methods and their verification techniques in embedded real-time systems has started to be a common practice, the same cannot be said about object-oriented ... Keywords: LOTOS, automatic verification, code generation, model-checking, object-oriented systems, steam-boiler

Paulo J. F. Carreira; Miguel E. F. Costa

2003-03-01T23:59:59.000Z

391

Near-Monodisperse Ni-Cu Bimetallic Nanocrystals of Variable Composition: Controlled Synthesis and Catalytic Activity for H2 Generation  

SciTech Connect

Near-monodisperse Ni{sub 1-x}Cu{sub x} (x = 0.2-0.8) bimetallic nanocrystals were synthesized by a one-pot thermolysis approach in oleylamine/1-octadecene, using metal acetylacetonates as precursors. The nanocrystals form large-area 2D superlattices, and display a catalytic synergistic effect in the hydrolysis of NaBH{sub 4} to generate H{sub 2} at x = 0.5 in a strongly basic medium. The Ni{sub 0.5}Cu{sub 0.5} nanocrystals show the lowest activation energy, and also exhibit the highest H{sub 2} generation rate at 298 K.

Zhang, Yawen; Huang, Wenyu; Habas, Susan E.; Kuhn, John N.; Grass, Michael E.; Yamada, Yusuke; Yang, Peidong; Somorjai, Gabor A.

2008-07-22T23:59:59.000Z

392

System Demonstration Multilingual Weather Forecast Generation System  

E-Print Network (OSTI)

System Demonstration Multilingual Weather Forecast Generation System Tianfang Yao DongmoZhang Qian (Multilingual Weather Forecasts Assistant) system will be demonstrated. It is developed to generate the multilingual text of the weather forecasts automatically. The raw data from the weather observation can be used

393

Nonlinear regression model generation using hyperparameter optimization  

Science Conference Proceedings (OSTI)

An algorithm of the inductive model generation and model selection is proposed to solve the problem of automatic construction of regression models. A regression model is an admissible superposition of smooth functions given by experts. Coherent Bayesian ... Keywords: Coherent Bayesian inference, Hyperparameters, Model generation, Model selection, Regression

Vadim Strijov; Gerhard Wilhelm Weber

2010-08-01T23:59:59.000Z

394

Automatic HVAC Air Recirculation Made Easy with Stepper Motors  

E-Print Network (OSTI)

TND416/D Abstract: This paper highlights the system requirements and operating conditions of automatic air recirculation valves and reviews compatibility of existing actuator types with these requirements. When comparing the available technologies, it becomes clear that air recirculation flap actuators containing a bipolar stepper motor offer key advantages over actuators with other motor types. It is shown how specific bipolar stepper motor drive techniques can contribute to the overall system performance while the total system cost is minimized. The paper elaborates on availability and key features of motor driver integrated circuits that allow advanced control of these novel actuators. 1.

unknown authors

2010-01-01T23:59:59.000Z

395

Generation Maintenance Application Center: Combined-Cycle Combustion Turbine Steam Turbine Stop and Control Valve Maintenance Guide  

Science Conference Proceedings (OSTI)

BackgroundCombustion turbine combined-cycle (CTCC) facilities use various components that are unique to these types of power generation plants. Therefore, use of the Electric Power Research Institute (EPRI) Preventive Maintenance Basis Database (1018758) by owners of CTCC facilities is somewhat limited to only those components that are common to both CTCC facilities and nuclear or fossil power plants. With the projected growth in the number of CTCC facilities, ...

2013-03-27T23:59:59.000Z

396

An Open Architecture for Versatile Machine and Actuator Control.  

E-Print Network (OSTI)

??Automatic control technology increases usability, reliability and productivity in manufacturing, transportation, and climate control. There are many additional areas of modern life that could benefit… (more)

Baxter, Michael Scott 1977-

2004-01-01T23:59:59.000Z

397

Quantum interference and control of the dynamic Franz-Keldysh effect: Generation and detection of terahertz space-charge fields  

Science Conference Proceedings (OSTI)

The Dynamic Franz Keldysh Effect (DFKE) is produced and controlled in bulk gallium arsenide by quantum interference without the aid of externally applied fields and is spatially and temporally resolved using ellipsometric pump-probe techniques. The {approx}3 THz internal driving field for the DFKE is a transient space-charge field that is associated with a critically damped coherent plasma oscillation produced by oppositely traveling ballistic electron and hole currents that are injected by two-color quantum interference techniques. The relative phase and polarization of the two pump pulses can be used to control the DFKE.

Wang, Rui [Laboratory for Photonics and Quantum Electronics, 138 IATL, University of Iowa, Iowa City, Iowa 52242 (United States) [Laboratory for Photonics and Quantum Electronics, 138 IATL, University of Iowa, Iowa City, Iowa 52242 (United States); Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045 (United States); Jacobs, Paul; Smirl, Arthur L. [Laboratory for Photonics and Quantum Electronics, 138 IATL, University of Iowa, Iowa City, Iowa 52242 (United States)] [Laboratory for Photonics and Quantum Electronics, 138 IATL, University of Iowa, Iowa City, Iowa 52242 (United States); Zhao, Hui [Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045 (United States)] [Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045 (United States)

2013-06-24T23:59:59.000Z

398

Automatically processed alpha-track radon monitor  

DOE Patents (OSTI)

An automatically processed alpha-track radon monitor is provided which includes a housing having an aperture allowing radon entry, and a filter that excludes the entry of radon daughters into the housing. A flexible track registration material is located within the housing that records alpha-particle emissions from the decay of radon and radon daughters inside the housing. The flexible track registration material is capable of being spliced such that the registration material from a plurality of monitors can be spliced into a single strip to facilitate automatic processing of the registration material from the plurality of monitors. A process for the automatic counting of radon registered by a radon monitor is also provided.

Langner, G.H. Jr.

1991-05-02T23:59:59.000Z

399

Pilot Study: Measurement of Room Illuminance to Assess Automatic Brightness  

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

Study: Measurement of Room Illuminance to Assess Automatic Brightness Study: Measurement of Room Illuminance to Assess Automatic Brightness Control in Televisions Title Pilot Study: Measurement of Room Illuminance to Assess Automatic Brightness Control in Televisions Publication Type Conference Proceedings Year of Publication 2012 Authors Greenblatt, Jeffery B., Mia Forbes Pirie, Louis-Benoit Desroches, Sally M. Donovan, Clancy Donnelly, Craig Billingsley, and Chris Calwell Pagination 13 Date Published August 12 Conference Location Berkeley Abstract Automatic brightness control (ABC) is an increasingly common feature found in newtelevisions (TVs) and computer monitors. ABC is intended to adjust TV screen brightness(luminance) according to the ambient light level (room illuminance). When implementedcorrectly, this can both reduce energy consumption and improve viewing quality. The currentENERGY STAR test procedure provides for a more favorable energy use rating for TVs withABC, by measuring power consumption at two light levels (0 and 300 lux) and reporting aweighted-average energy use. However, this and other studies suggest that these levels are notrepresentative of actual TV viewing conditions.As there were currently only limited data available concerning room illuminance, weundertook a small pilot study in 2011 to begin to answer two key questions: 1. To what extent doroom illuminance levels vary depending on the location of measurement (e.g., center of theroom, on the couch, or at the TV)? 2. What room illuminance conditions are prevalent whenpeople watch TV?We measured room illuminance in the homes of nine volunteers in California andColorado to begin addressing the above two questions. Although the study had the usualdrawbacks of a pilot (limited sample size, time duration, etc.), it has, nonetheless, yielded usefulresults. The study shows definitively that there is large variability between measurements madeat different locations in the room and, therefore, that location of room illuminance measurementsis critical. Moreover, the majority (over 75%) of TV viewing occurred at illuminance levels ofless than 50 lux (though measurements of up to several hundred lux were also recorded), a resultthat was consistent with subsequent larger-scale studies. This type of information can helpdetermine how ABC-enabled TVs should be tested to best represent actual viewing conditions.

400

Grid Friendly Appliance™ Controller - Energy Innovation Portal  

The Grid Friendly Appliance controller developed at PNNL senses grid conditions by monitoring the frequency of the system and provides automatic deman ...

Note: This page contains sample records for the topic "automatic generation control" 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

Grid Friendly™ Charger Controller - Available Technologies ...  

Daily battery charging is fully automatic with the Grid Friendly ... Reduced electricity costs for consumers—the Grid Friendly Charger Controller ...

402

Modeling, analysis and neural MPPT control design of a PV-generator powered dc motor-pump system  

Science Conference Proceedings (OSTI)

This paper presents the optimization of a photovoltaic (PV) water pumping system using maximum power point tracking technique (MPPT). The optimization is suspended to reference optimal power. This optimization technique is developed to assure the optimum ... Keywords: artificial neural network controller, drive systems, maximum power point tracking, photovoltaic

Ahmed. M. Kassem

2011-12-01T23:59:59.000Z

403

Combined cycle electric power plant and a heat recovery steam generator having improved boiler feed pump flow control  

SciTech Connect

A combined cycle electric power plant is described that includes gas and steam turbines and a steam generator for recovering the heat in the exhaust gases exited from the gas turbine and for using the recovered heat to produce and supply steam to the steam turbine. The steam generator includes an economizer tube and a high pressure evaporator tube and a boiler feed pump for directing the heat exchange fluid serially through the aforementioned tubes. A condenser is associated with the steam turbine for converting the spent steam into condensate water to be supplied to a deaerator for removing undesired air and for preliminarily heating the water condensate before being pumped to the economizer tube. Condensate flow through the economizer tube is maintained substantially constant by maintaining the boiler feed pump at a predetermined, substantially constant rate. A bypass conduit is provided to feed back a portion of the flow heated in the economizer tube to the deaerator; the portion being equal to the difference between the constant flow through the economizer tube and the flow to be directed through the high pressure evaporator tube as required by the steam turbine for its present load.

Martz, L.F.; Plotnick, R.J.

1976-06-29T23:59:59.000Z

404

Automatic Projector Calibration with Embedded Light Sensors  

E-Print Network (OSTI)

Projection technology typically places several constraints on the geometric relationship between the projector and the projection surface to obtain an undistorted, properly sized image. In this paper we describe a simple, robust, fast, and low-cost method for automatic projector calibration that eliminates many of these constraints. We embed light sensors in the target surface, project Gray-coded binary patterns to discover the sensor locations, and then prewarp the image to accurately fit the physical features of the projection surface. This technique can be expanded to automatically stitch multiple projectors, calibrate onto nonplanar surfaces for object decoration, and provide a method for simple geometry acquisition.

Johnny C. Lee; Johnny C. Lee; Paul H. Dietz; Paul H. Dietz; Dan Maynes-Aminzade; Dan Maynes-aminzade; Scott E. Hudson; Scott E. Hudson

2004-01-01T23:59:59.000Z

405

Automatic induction of verb classes using clustering  

E-Print Network (OSTI)

and Shi, 2001) which consistently outperforms other previous methods in our studies. We also introduce a method to automatically de- tect the number of clusters for SPEC (Zelnik-Manor and Perona, 2004). In addition, we introduce HGFC (Yu et al., 2006) as a... and Shi, 2001) which consistently outperforms other previous methods in our studies. We also introduce a method to automatically de- tect the number of clusters for SPEC (Zelnik-Manor and Perona, 2004). In addition, we introduce HGFC (Yu et al., 2006) as a...

Sun, Lin

2013-04-30T23:59:59.000Z

406

Doing better with less energy [fuel-efficient power generation  

Science Conference Proceedings (OSTI)

The authors describe how many fuel-efficient coal-fired power generation technologies can be adopted at reduced net cost, but argue that, unless barriers to innovation are removed, their adoption will be far from automatic

J. Sathbye; J. Sinton; T. Heller

1999-12-01T23:59:59.000Z

407

Chapter generation for digital video recorder based on perceptual clustering  

Science Conference Proceedings (OSTI)

We propose a novel automatic chapter generating technique for digital video recorder (DVR) based on a perceptual clustering. Clustering with two-staged hierarchy is introduced for the first time, showing better performance than previous approaches without ...

M. Yamauchi; M. Kimura; J. Ohmiya; J. Nishikawa; I. Okabayashi

2006-09-01T23:59:59.000Z

408

Generating Semantic Description from Drawings of Scenes with Shadows  

E-Print Network (OSTI)

The research reported here concerns the principles used to automatically generate three-dimensional representations from line drawings of scenes. The computer programs involved look at scenes which consist of polyhedra and ...

Waltz, David L.

409

Weaving independently generated photons into an arbitrary graph state  

SciTech Connect

The controlled-Z (cz) operations acting separately on pairs of qubits are commonly adopted in the schemes of generating graph states, the multipartite entangled states for the one-way quantum computing. For this purpose, we propose a setup of cascade cz operation on a whole group of qubits in sequence. The operation of the setup starts with entangling an ancilla photon with the first photon as qubit, and this ancilla automatically moves from one entanglement link to another in assisting the formation of a string in graph states. The generation of some special types of graph states, such as the three-dimensional ones, can be greatly simplified in this approach. The setup presented uses weak nonlinearities, but an implementation using probabilistic linear optics is also possible.

Lin, Qing [College of Information Science and Engineering, Huaqiao University (Xiamen), Xiamen 361021 (China); He, Bing [University of California, Merced, 5200 North Lake Road, Merced, California 95343 (United States); Institute for Quantum Information Science, University of Calgary, Alberta T2N 1N4 (Canada)

2011-12-15T23:59:59.000Z

410

Weaving independently generated photons into an arbitrary graph state  

E-Print Network (OSTI)

The controlled Z (CZ) operations acting separately on pairs of qubits are commonly adopted in the schemes of generating graph states, the multi-partite entangled states for the one-way quantum computing. For this purpose, we propose a setup of cascade CZ operation on a whole group of qubits in sequence. The operation of the setup starts with entangling an ancilla photon to the first photon as qubit, and this ancilla automatically moves from one entanglement link to another in assisting the formation of a string in graph states. The generation of some special types of graph states, such as the three-dimensional ones, can be greatly simplified in this approach. The setup presented uses weak nonlinearities, but an implementation using probabilistic linear optics is also possible.

Qing Lin; Bing He

2010-11-21T23:59:59.000Z

411

A comparison of taxonomy generation techniques using bibliometric methods : applied to research strategy formulation  

E-Print Network (OSTI)

This paper investigates the modeling of research landscapes through the automatic generation of hierarchical structures (taxonomies) comprised of terms related to a given research field. Several different taxonomy generation ...

Camiña, Steven L

2010-01-01T23:59:59.000Z

412

Lightweight automatic face annotation in media pages  

Science Conference Proceedings (OSTI)

Labeling human faces in images contained in Web media stories enables enriching the user experience offered by media sites. We propose a lightweight framework for automatic image annotation that exploits named entities mentioned in the article to significantly ... Keywords: face recognition, machine learning, text analysis, web search

Dmitri Perelman; Edward Bortnikov; Ronny Lempel; Roman Sandler

2012-04-01T23:59:59.000Z

413

Automatic Layout Design for Power Module  

SciTech Connect

The layout of power modules is one of the key points in power module design, especially for high power densities, where couplings are increased. In this paper, along with the design example, an automatic design processes by using a genetic algorithm are presented. Some practical considerations and implementations are introduced in the optimization of module layout design.

Ning, Puqi [ORNL; Wang, Fei [ORNL; Ngo, Khai [Virginia Polytechnic Institute and State University (Virginia Tech)

2013-01-01T23:59:59.000Z

414

Ontology-based automatic query refinement  

Science Conference Proceedings (OSTI)

The effectiveness of user query plays a vital role in retrieving highly relevant documents in keyword-based search engine. Because of the lack of domain knowledge, users tend to post very short queries, which do not express their information need ... Keywords: automatic query refinement, document retrieval, information retrieval, keywords, ontology, query expansion, retrieval relevancy, search engines, semantic search, user queries

S. Sendhilkumar; G. S. Mahalakshmi; S. N. Rajasekar

2009-07-01T23:59:59.000Z

415

Automatic translation from Circus to Java  

Science Conference Proceedings (OSTI)

Circus is a combination of Z and CSP that supports the development of state-rich reactive systems based on refinement. In this paper we present JCircus, a tool that automatically translates Circus programs into Java, for the purpose of animation and ...

Angela Freitas; Ana Cavalcanti

2006-08-01T23:59:59.000Z

416

Automated manual transmission clutch controller  

DOE Patents (OSTI)

A powertrain system for a hybrid vehicle. The hybrid vehicle includes a heat engine, such as a diesel engine, and an electric machine, which operates as both an electric motor and an alternator, to power the vehicle. The hybrid vehicle also includes a manual-style transmission configured to operate as an automatic transmission from the perspective of the driver. The engine and the electric machine drive an input shaft which in turn drives an output shaft of the transmission. In addition to driving the transmission, the electric machine regulates the speed of the input shaft in order to synchronize the input shaft during either an upshift or downshift of the transmission by either decreasing or increasing the speed of the input shaft. When decreasing the speed of the input shaft, the electric motor functions as an alternator to produce electrical energy which may be stored by a storage device. Operation of the transmission is controlled by a transmission controller which receives input signals and generates output signals to control shift and clutch motors to effect smooth launch, upshift shifts, and downshifts of the transmission, so that the transmission functions substantially as an automatic transmission from the perspective of the driver, while internally substantially functioning as a manual transmission.

Lawrie, Robert E. (9375 Kearney Rd., Whitmore Lake, MI 48189); Reed, Jr., Richard G. (3003 Bembridge, Royal Oak, MI 48073); Rausen, David J. (519 S. Gaylord St., Denver, CO 80209)

1999-11-30T23:59:59.000Z

417

Distributed Hierarchical Control of Multi-Area Power Systems with Improved Primary Frequency Regulation  

SciTech Connect

The conventional distributed hierarchical control architecture for multi-area power systems is revisited. In this paper, a new distributed hierarchical control architecture is proposed. In the proposed architecture, pilot generators are selected in each area to be equipped with decentralized robust control as a supplementary to the conventional droop speed control. With the improved primary frequency control, the system frequency can be restored to the nominal value without the help of secondary frequency control, which reduces the burden of the automatic generation control for frequency restoration. Moreover, the low frequency inter-area electromechanical oscillations can also be effectively damped. The effectiveness of the proposed distributed hierarchical control architecture is validated through detailed simulations.

Lian, Jianming; Marinovici, Laurentiu D.; Kalsi, Karanjit; Du, Pengwei; Elizondo, Marcelo A.

2012-12-12T23:59:59.000Z

418

Embedded automatic parking management system based on RFID and existed gate system integration  

Science Conference Proceedings (OSTI)

In this paper, an Embedded Automatic Parking Management System (EAPMS) that integrates the existed gate system and RFID is proposed. This system includes Embedded Gate Hardware, Gate-PC Controller, RFID System, Parking Management Platform. Most systems ... Keywords: RFID, embedded, parking management, system integration

Ming-Shen Jian; Kuen Shiuh Yang; Chung-Lun Lee; Nan-Yuan Huang

2008-07-01T23:59:59.000Z

419

Automatic Fuzzy Parameter Selection in Dynamic Fuzzy Voter for Safety Critical Systems  

Science Conference Proceedings (OSTI)

The main objective of this research paper is designing automatic fuzzy parameter selection based dynamic fuzzy voter for safety critical systems with limited system knowledge. Existing fuzzy voters for controlling safety critical systems and sensor fusion ... Keywords: Fuzzy Bandwidth, Fuzzy Voters, Safety Critical Systems, Statistical Parameters Systems, Triple Modular Redundant TMR, Weighted Average Voters

PhaniKumar Singamsetty; SeethaRamaiah Panchumarthy

2012-04-01T23:59:59.000Z

420

Copyright 2010 IEEE. Reprinted from: Toward PMU-Based Robust Automatic Voltage  

E-Print Network (OSTI)

) and Automatic Flow Control (AFC) IEEE Power and Energy Society General Meeting, July 2010, Minneapolis, MN USA for scheduling resources given demand forecast, and by relying on an automated feedback to ensure that voltage-responsive demand. It is no longer possible to schedule for accurate forecast and not adjust settings of key

Note: This page contains sample records for the topic "automatic generation control" 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

Automatic transportation of biological cells with a robot-tweezer manipulation system  

Science Conference Proceedings (OSTI)

The positioning of biological cells has become increasingly important in biomedical research such as drug discovery, cell-to-cell interaction, and tissue engineering. Significant demand for both accuracy and productivity in cell manipulation highlights ... Keywords: automatic transportation, cell manipulation, optical tweezers, robot, synchronization control

Songyu Hu; Dong Sun

2011-12-01T23:59:59.000Z

422

Bilingual Experiments on Automatic Recovery of Capitalization and Punctuation of Automatic Speech Transcripts  

Science Conference Proceedings (OSTI)

This paper focuses on the tasks of recovering capitalization and punctuation marks from texts without that information, such as spoken transcripts, produced by automatic speech recognition systems. These two practical rich transcription tasks were performed ...

F. Batista; H. Moniz; I. Trancoso; N. Mamede

2012-02-01T23:59:59.000Z

423

Semi-automatic composition of ontologies for ASKALON grid workflows  

Science Conference Proceedings (OSTI)

Automatic workflow composition with the help of ontologies has been addressed by numerous researchers in the past. While ontologies are very useful for automatic and semiautomatic workflow composition, ontology creation itself remains a very important ...

Muhammad Junaid Malik; Thomas Fahringer; Radu Prodan

2011-08-01T23:59:59.000Z

424

Classification based automatic information extraction system from free text  

Science Conference Proceedings (OSTI)

The ever increasing on-line text information can be made available to automatic processing by information system. Several machine learning techniques have been applied in order to build automatic information that rivaling knowledge engineering approach. ...

Myat Myo Nwe Wai

2011-03-01T23:59:59.000Z

425

Using constraints to achieve stability in automatic graph layout algorithms  

Science Conference Proceedings (OSTI)

Automatic layout algorithms are commonly used when displaying graphs on the screen because they provide a “nice” drawing of the graph without user intervention. There are, however, a couple of disadvantages to automatic layout. Without user ...

Karl-Friedrich Böhringer; Frances Newbery Paulisch

1990-03-01T23:59:59.000Z

426

Automatic Document Orientation Detection and Categorization through Document Vectorization  

E-Print Network (OSTI)

Automatic Document Orientation Detection and Categorization through Document Vectorization Shijian, Kent Ridge, 117543 {lusj, tancl@comp.nus.edu.sg} ABSTRACT This paper presents an automatic orientation carry out orientation detection and cate- gorization through document vectorization, which encodes

Tan, Chew Lim

427

Rotor assembly and method for automatically processing liquids  

DOE Patents (OSTI)

A rotor assembly for performing a relatively large number of processing steps upon a sample, such as a whole blood sample, and a diluent, such as water, includes a rotor body for rotation about an axis and including a network of chambers within which various processing steps are performed upon the sample and diluent and passageways through which the sample and diluent are transferred. A transfer mechanism is movable through the rotor body by the influence of a magnetic field generated adjacent the transfer mechanism and movable along the rotor body, and the assembly utilizes centrifugal force, a transfer of momentum and capillary action to perform any of a number of processing steps such as separation, aliquoting, transference, washing, reagent addition and mixing of the sample and diluent within the rotor body. The rotor body is particularly suitable for automatic immunoassay analyses.

Burtis, Carl A. (Oak Ridge, TN); Johnson, Wayne F. (Loudon, TN); Walker, William A. (Knoxville, TN)

1992-01-01T23:59:59.000Z

428

Rotor assembly and method for automatically processing liquids  

DOE Patents (OSTI)

A rotor assembly is described for performing a relatively large number of processing steps upon a sample, such as a whole blood sample, and a diluent, such as water. It includes a rotor body for rotation about an axis and includes a network of chambers within which various processing steps are performed upon the sample and diluent and passageways through which the sample and diluent are transferred. A transfer mechanism is movable through the rotor body by the influence of a magnetic field generated adjacent the transfer mechanism and movable along the rotor body, and the assembly utilizes centrifugal force, a transfer of momentum and capillary action to perform any of a number of processing steps such as separation, aliquoting, transference, washing, reagent addition and mixing of the sample and diluent within the rotor body. The rotor body is particularly suitable for automatic immunoassay analyses. 34 figs.

Burtis, C.A.; Johnson, W.F.; Walker, W.A.

1992-12-22T23:59:59.000Z

429

Automatic tagging by exploring tag information capability and correlation  

Science Conference Proceedings (OSTI)

Automatic tagging can automatically label images and videos with semantic tags to significantly facilitate multimedia search and organization. However, most of existing tagging algorithms often don't differentiate between tags used to describe visual ... Keywords: automatic tagging, information capability, set correlation

Xiaoming Zhang; Zi Huang; Heng Tao Shen; Yang Yang; Zhoujun Li

2012-05-01T23:59:59.000Z

430

Structural controls, alteration, permeability and thermal regime of Dixie Valley from new-generation MT/galvanic array profiling  

DOE Green Energy (OSTI)

State-of-the-art MT array measurements in contiguous bipole deployments across the Dixie Valley thermal area have been integrated with regional MT transect data and other evidence to address several basic geothermal goals. These include 1), resolve a fundamental structural ambiguity at the Dixie Valley thermal area (single rangefront fault versus shallower, stepped pediment; 2), delineate fault zones which have experienced fluid flux as indicated by low resistivity; 3), infer ultimate heat and fluid sources for the thermal area; and 4), from a generic technique standpoint, investigate the capability of well-sampled electrical data for resolving subsurface structure. Three dense lines cross the Senator Fumaroles area, the Cottonwood Creek and main producing area, and the low-permeability region through the section 10-15 area, and have stand-alone MT soundings appended at one or both ends for local background control. Regularized 2-D inversion implies that shallow pediment basement rocks extend for a considerable distance (1-2 km) southeastward from the topographic scarp of the Stillwater Range under all three dense profiles, but especially for the Senator Fumaroles line. This result is similar to gravity interpretations in the area, but with the intrinsic depth resolution possible from EM wave propagation. Low resistivity zones flank the interpreted main offsetting fault especially toward the north end of the field which may be due to alteration from geothermal fluid outflow and upflow. The appended MT soundings help to substantiate a deep, subvertical conductor intersecting the base of Dixie Valley from the middle crust, which appears to be a hydrothermal conduit feeding from deep crustal magmatic underplating. This may supply at least part of the high temperature fluids and explain enhanced He-3 levels in those fluids.

Philip E. Wannamaker

2007-11-30T23:59:59.000Z

431

Semi-Automatic Distribution Pattern Modeling of Web Service Compositions using Semantics  

E-Print Network (OSTI)

Enterprise systems are frequently built by combining a number of discrete Web services together, a process termed composition. There are a number of architectural configurations or distribution patterns, which express how a composed system is to be deployed. Previously, we presented a Model Driven Architecture using UML 2.0, which took existing service interfaces as its input and generated an executable Web service composition, guided by a distribution pattern model. In this paper, we propose using Web service semantic descriptions in addition to Web service interfaces, to assist in the semi-automatic generation of the distribution pattern model. Web services described using semantic languages, such as OWL-S, can be automatically assessed for compatibility and their input and output messages can be mapped to each other. 1.

Ronan Barrett

2006-01-01T23:59:59.000Z

432

Automatic History Matching of Geothermal Field Performance  

DOE Green Energy (OSTI)

We have developed inverse modeling capabilities for the multiphase multicomponent numerical simulator TOUGH2 to facilitate automatic history matching and parameter estimation based on data obtained during exploitation of geothermal fields. The ITOUGH2 code allows one to estimate TOUGH2 input parameters based on any type of observation for which a corresponding TOUGH2 output can be calculated. Furthermore, a detailed residual and error analysis is performed, and the uncertainty of model predictions can be evaluated. This paper focuses on the solution of the inverse problem, i.e. the determination of model-related parameters by automatically calibrating a conceptual model of the geothermal system against data obtained during field operation. We first describe the modeling approach used to simulate fluid and heat flow in fractured-porous media. The inverse problem is then formulated, followed by a brief discussion of the optimization algorithm. A sample problem is given to demonstrate the application of the method to geothermal reservoir data.

Finsterle, S.; Pruess, K.

1995-01-01T23:59:59.000Z

433

Automatic history matching of geothermal field performance  

DOE Green Energy (OSTI)

We have developed inverse modeling capabilities for the multiphase multicomponent numerical simulator TOUGH2 to facilitate automatic history matching, and parameter estimation based on data obtained during exploitation of Geothermal fields. The ITOUGH2 code allows one to estimate TOUGH2 input parameters based on any type of observation for which a corresponding TOUGH2 output can be calculated. Furthermore, a detailed residual and error analysis is performed, and the uncertainty of model predictions can be evaluated. This paper focuses on the solution of the inverse; problem, i.e. the determination of model-related parameters by automatically calibrating a conceptual model of the Geothermal system against data obtained during field operation. We first describe the modeling, approach used to simulate fluid and heat flow in fractured-porous media. The inverse problem is then formulated, followed by a brief discussion of the optimization algorithm. A sample problem is given to demonstrate the application of the method to Geothermal reservoir data.

Finsterle, S.; Pruess, K>

1995-08-01T23:59:59.000Z

434

Natural Statistical Models for Automatic Speech Recognition  

E-Print Network (OSTI)

The performance of state-of-the-art speech recognition systems is still far worse than that of humans. This is partly caused by the use of poor statistical models. In a general statistical pattern classification task, the probabilistic models should represent the statistical structure unique to and distinguishing those objects to be classified. In many cases, however, model families are selected without verification of their ability to represent vital discriminative properties. For example, Hidden Markov Models (HMMs) are frequently used in automatic speech recognition systems even though they possess conditional independence properties that might cause inaccuracies when modeling and classifying speech signals. In this work, a new method for automatic speech recognition is developed where the natural statistical properties of speech are used to determine the probabilistic model. Starting from an HMM, new models are created by adding dependencies only if they are not already well captured by the HMM, and only if they increase the

Jeffrey Adam Bilmes

1999-01-01T23:59:59.000Z

435

Automatic Sequences and Zip-Specifications  

E-Print Network (OSTI)

We consider infinite sequences of symbols, also known as streams, and the decidability question for equality of streams defined in a restricted format. This restricted format consists of prefixing a symbol at the head of a stream, of the stream function `zip', and recursion variables. Here `zip' interleaves the elements of two streams in alternating order, starting with the first stream. For example, the Thue-Morse sequence is obtained by the `zip-specification' {M = 0 : X, X = 1 : zip(X,Y), Y = 0 : zip(Y,X)}. Our analysis of such systems employs both term rewriting and coalgebraic techniques. We establish decidability for these zip-specifications, employing bisimilarity of observation graphs based on a suitably chosen cobasis. The importance of zip-specifications resides in their intimate connection with automatic sequences. We establish a new and simple characterization of automatic sequences. Thus we obtain for the binary zip that a stream is 2-automatic iff its observation graph using the cobasis (hd,even...

Grabmayer, Clemens; Hendriks, Dimitri; Klop, Jan Willem; Moss, Lawrence S

2012-01-01T23:59:59.000Z

436

Reviewing the role of photosensors in lighting control systems  

Science Conference Proceedings (OSTI)

The application of innovative technologies of automatic control in lighting systems gains daily the interest of engineers, constructors and users. The main purpose of these applications is the energy savings. Daylight control is a form of automatic control ... Keywords: daylight, lighting controls, photosensor

L. Doulos; A. Tsangrassoulis; F. V. Topalis

2007-05-01T23:59:59.000Z

437

Automatic Corresponding Control Points Selection for Historical Document Image Registration  

E-Print Network (OSTI)

. Bedini, and E. Salerno. Independent com- ponent analysis for document restoration. International Journal on Docucment Analysis and Recognition, 7(1):17­ 27, 2004. [13] A. Tonazzini, E. Salerno, and L. Bedini. Fast

Tan, Chew Lim

438

Numerical Lab 2007/08 AUTOMATIC CONTROL OF A  

E-Print Network (OSTI)

thermodynamic laws and fundamental heat and mass transfer relations to individual components. Many of the models..................................................................... 54 2.2.1. Analysis of Heat Transfer between Moist Air and Cold Surface by McElgin and Wiley................................................................................................................. 54 2.2.2. Analysis of Air Side Heat Transfer in Finned Tube Heat Exchangers by Webb

Hron, Jaroslav

439

Automatic control in the iron and steel industry  

Science Conference Proceedings (OSTI)

Basic iron and steel production processes, starting in the blast furnace and followed by steelmaking and rolling procedures, have not been altered greatly, although there have been modifying developments in individual processes, such as a basic oxygen ...

T. Isobe

1970-01-01T23:59:59.000Z

440

Analysis of Automatic Control Data for Storage Operations  

Science Conference Proceedings (OSTI)

Bulk energy storage devices and fleets of electric vehicles are being proposed as a resource for regulation services. To use energy storage for regulation services, energy storage is expected to operate seamlessly, in concert with existing regulation resources and existing regulation operation processes. This project identified, collected, and initially analyzed operating data from the California Independent System Operator (ISO) to address the use of energy storage for regulation ...

2013-12-05T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

Overcoming Visibility Issues in a Small-to-Medium Retailer Using Automatic Identification and Data Capture Technology: An Evolutionary Approach  

Science Conference Proceedings (OSTI)

In this paper, the authors the inventory control practices of a small-to-medium retailer to identify common challenges this type of organization experiences with respect to automated data capture ADC and the implementation of an enterprise wide information ... Keywords: Automatic Identification and Data Capture AIDC, Barcode, Business Process, Information Systems, Inventory Control, Radio-Frequency Identification RFID, Small-to-Medium Retailer

Dane Hamilton; Katina Michael; Samuel Fosso Wamba

2010-04-01T23:59:59.000Z

442

Improvement of air handling unit control performance using reinforcement learning  

Science Conference Proceedings (OSTI)

Most common applications using neural networks for control problems are the automatic controls using the artificial perceptual function. These control mechanisms are similar to those of the intelligent and pattern recognition control of an adaptive method ...

Sangjo Youk; Moonseong Kim; Yangsok Kim; Gilcheol Park

2006-08-01T23:59:59.000Z

443

Correctness Analysis Of An Embedded Controller  

E-Print Network (OSTI)

In this paper we report on the use of a new method for quality assurance of safety-critical software in aerospace applications. The power and thermal control unit (PTC) of the X-ray satellite "Abrixas", developed by OHB System GmbH, Bremen, was analysed with this new formal method. On the basis of formal specifications we automatically generated and executed test sequences for the reactive behaviour of the controller. We checked the full functionality of the PTC, including real-time and hybrid properties, user interaction, stress- and long-term behaviour, and fault tolerance. Our tool VVT-RT generated an extensive coverage of test sequences for these properties. The tests were then automatically performed and evaluated, using the original hardware in a simulation environment. Due to the universality of VVTRT, only little effort was necessary to set up the interfaces. Thus, even though we achieved a higher test coverage, the overall costs of the validation were much lower than with comp...

Holger Schlingloff; Oliver Meyer; Thomas Hülsing

1999-01-01T23:59:59.000Z

444

ARE660 Wind Generator: Low Wind Speed Technology for Small Turbine Development  

DOE Green Energy (OSTI)

This project is for the design of a wind turbine that can generate most or all of the net energy required for homes and small businesses in moderately windy areas. The purpose is to expand the current market for residential wind generators by providing cost effective power in a lower wind regime than current technology has made available, as well as reduce noise and improve reliability and safety. Robert W. Preus’ experience designing and/or maintaining residential wind generators of many configurations helped identify the need for an improved experience of safety for the consumer. Current small wind products have unreliable or no method of stopping the wind generator in fault or high wind conditions. Consumers and their neighbors do not want to hear their wind generators. In addition, with current technology, only sites with unusually high wind speeds provide payback times that are acceptable for the on-grid user. Abundant Renewable Energy’s (ARE) basic original concept for the ARE660 was a combination of a stall controlled variable speed small wind generator and automatic fail safe furling for shutdown. The stall control for a small wind generator is not novel, but has not been developed for a variable speed application with a permanent magnet alternator (PMA). The fail safe furling approach for shutdown has not been used to our knowledge.

Robert W. Preus; DOE Project Officer - Keith Bennett

2008-04-23T23:59:59.000Z

445

MDP Optimal Control under Temporal Logic Constraints  

E-Print Network (OSTI)

In this paper, we develop a method to automatically generate a control policy for a dynamical system modeled as a Markov Decision Process (MDP). The control specification is given as a Linear Temporal Logic (LTL) formula over a set of propositions defined on the states of the MDP. We synthesize a control policy such that the MDP satisfies the given specification almost surely, if such a policy exists. In addition, we designate an "optimizing proposition" to be repeatedly satisfied, and we formulate a novel optimization criterion in terms of minimizing the expected cost in between satisfactions of this proposition. We propose a sufficient condition for a policy to be optimal, and develop a dynamic programming algorithm that synthesizes a policy that is optimal under some conditions, and sub-optimal otherwise. This problem is motivated by robotic applications requiring persistent tasks, such as environmental monitoring or data gathering, to be performed.

Ding, Xu Chu; Belta, Calin; Rus, Daniela

2011-01-01T23:59:59.000Z

446

Janus: Automatic Ontology Builder from XSD Files  

E-Print Network (OSTI)

The construction of a reference ontology for a large domain still remains an hard human task. The process is sometimes assisted by software tools that facilitate the information extraction from a textual corpus. Despite of the great use of XML Schema files on the internet and especially in the B2B domain, tools that offer a complete semantic analysis of XML schemas are really rare. In this paper we introduce Janus, a tool for automatically building a reference knowledge base starting from XML Schema files. Janus also provides different useful views to simplify B2B application integration.

Bedini, Ivan; Gardarin, Georges

2010-01-01T23:59:59.000Z

447

Electricity demand as frequency controlled reserves, ForskEL...  

Open Energy Info (EERE)

References EU Smart Grid Projects Map1 Overview The project developed technology for demand frequency controlled reserve (DFR) implementation, a system that automatically...

448

Toward bridging the annotation-retrieval gap in image search by a generative modeling approach  

Science Conference Proceedings (OSTI)

While automatic image annotation remains an actively pursued research topic, enhancement of image search through its use has not been extensively explored. We propose an annotation-driven image retrieval approach and argue that under a number of different ... Keywords: automatic annotation, generative models, image search

Ritendra Datta; Weina Ge; Jia Li; James Z. Wang

2006-10-01T23:59:59.000Z

449

Energy saving dishwashing method with heater control  

SciTech Connect

A control circuit for a dishwashing machine to economize its energy consumption and usage. In order to conserve energy, the dishwashing machine has a control system for automatically actuating the components such as the heating elements of the dishwashing machine.

Helwig, W.F.

1982-05-25T23:59:59.000Z

450

DSOPilot project Automatic receipt of short circuiting indicators...  

Open Energy Info (EERE)

Project Name DSOPilot project Automatic receipt of short circuiting indicators Country Denmark Coordinates 56.26392, 9.501785 Loading map... "minzoom":false,"mappingservice":"...

451

Building Energy Models Can Be Automatically Adjusted To Fit Data  

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

EETD Safety Program Development Contact Us Department Contacts Media Contacts Building Energy Models Can Be Automatically Adjusted To Fit Data Speaker(s): Douglas Black Nathan...

452

Triangle geometry processing for surface modeling and cartesian grid generation  

DOE Patents (OSTI)

Cartesian mesh generation is accomplished for component based geometries, by intersecting components subject to mesh generation to extract wetted surfaces with a geometry engine using adaptive precision arithmetic in a system which automatically breaks ties with respect to geometric degeneracies. During volume mesh generation, intersected surface triangulations are received to enable mesh generation with cell division of an initially coarse grid. The hexagonal cells are resolved, preserving the ability to directionally divide cells which are locally well aligned.

Aftosmis, Michael J. (San Mateo, CA); Melton, John E. (Hollister, CA); Berger, Marsha J. (New York, NY)

2002-09-03T23:59:59.000Z

453

Control of binary distillation column using fuzzy PI controllers  

Science Conference Proceedings (OSTI)

In this paper the automatic control of a binary distillation column is described. This control is done with fuzzy logic controllers. After a short explanation of the function and dynamic of a binary distillation column, it's operating and control strategies ... Keywords: binary distillation column, fuzzy inference system, simulation

Shahram Javadi; Jabber Hosseini

2009-08-01T23:59:59.000Z

454

NUCLEAR REACTOR CONTROL SYSTEM  

DOE Patents (OSTI)

A control system is described for a nuclear reactor using enriched uranium fuel of the type of the swimming pool and other heterogeneous nuclear reactors. Circuits are included for automatically removing and inserting the control rods during the course of normal operation. Appropriate safety circuits close down the nuclear reactor in the event of emergency.

Epler, E.P.; Hanauer, S.H.; Oakes, L.C.

1959-11-01T23:59:59.000Z

455

Automated manual transmission mode selection controller  

DOE Patents (OSTI)

A powertrain system for a hybrid vehicle. The hybrid vehicle includes a heat engine, such as a diesel engine, and an electric machine, which operates as both an electric motor and an alternator, to power the vehicle. The hybrid vehicle also includes a manual-style transmission configured to operate as an automatic transmission from the perspective of the driver. The engine and the electric machine drive an input shaft which in turn drives an output shaft of the transmission. In addition to driving the transmission, the electric machine regulates the speed of the input shaft in order to synchronize the input shaft during either an upshift or downshift of the transmission by either decreasing or increasing the speed of the input shaft. When decreasing the speed of the input shaft, the electric motor functions as an alternator to produce electrical energy which may be stored by a storage device. Operation of the transmission is controlled by a transmission controller which receives input signals and generates output signals to control shift and clutch motors to effect smooth launch, upshift shifts, and downshifts of the transmission, so that the transmission functions substantially as an automatic transmission from the perspective of the driver, while internally substantially functioning as a manual transmission.

Lawrie, Robert E. (Whitmore Lake, MI)

1999-11-09T23:59:59.000Z

456

Automated manual transmission shift sequence controller  

DOE Patents (OSTI)

A powertrain system for a hybrid vehicle. The hybrid vehicle includes a heat engine, such as a diesel engine, and an electric machine, which operates as both, an electric motor and an alternator, to power the vehicle. The hybrid vehicle also includes a manual-style transmission configured to operate as an automatic transmission from the perspective of the driver. The engine and the electric machine drive an input shaft which in turn drives an output shaft of the transmission. In addition to driving the transmission, the electric machine regulates the speed of the input shaft in order to synchronize the input shaft during either an upshift or downshift of the transmission by either decreasing or increasing the speed of the input shaft. When decreasing the speed of the input shaft, the electric motor functions as an alternator to produce electrical energy which may be stored by a storage device. Operation of the transmission is controlled by a transmission controller which receives input signals and generates output signals to control shift and clutch motors to effect smooth launch, upshift shifts, and downshifts of the transmission, so that the transmission functions substantially as an automatic transmission from the perspective of the driver, while internally substantially functioning as a manual transmission.

Lawrie, Robert E. (Whitmore Lake, MI); Reed, Richard G. (Royal Oak, MI); Rausen, David J. (Denver, CO)

2000-02-01T23:59:59.000Z

457

D0 Experimental Area Emergency Backup Power and Generator Test  

SciTech Connect

The DO experimental area has a generator designated as emergency power. This generator provides power for critical loads and starts automatically upon loss of commercial power. This note concerns the testing of this generator. A list of loads is attached to this note. One of the loads on the emergency power grid is a 10KVA Uninterruptable Power Supply(UPS). The UPS powers the cryogenic controls and Oxygen deficiency hazard equipment(ODH) and has a minimum rating of 20 minutes while on its batteries(to cover the transfer time to/from the emergency generator). Jan 23,1991 at 1640 hrs this system was tested under the supervision of the Terry Ross, Marv Johnson, Dan Markley, Kelly Dixon, and John Urbin. The power feeder to the emergency power grid at DO was disconnected. The generator responded immediately and was supplying power to the emergency power grid in less than 10 seconds. During the 10 seconds that there was no power on the emergency grid the UPS switched on its inverter and provided uninterrupted power to the cryogenic control system and the ODH system. All of the motorized equipment shut off instrument air compressor, vacuum pumps 1 and 2, insulating vacuum blower, glycol cooling pumps, cooling tower fan, and Exhaust Fan 7(EF7). Upon reengagement of power to the grid from the emergency generator, all of the motorized loads started back up with the exception of vacuum pumps 1 and 2, and the UPS inverter turned off. Vacuum pumps 1 and 2 were delay started 20 seconds by the cryogenic control system as not to cause too large of a surge in power by all of the inductive loads starting at once. The DO building elevator which is also on emergency power was test run while the emergency generator was on line with all other emergency loads. The emergency generator current was 140 amps with all loads on line and running except the building elevator. This load of 140 amps is 27% of the generator's capacity. The cryogenic control and ODH system continued to function properly throughout the entire test due to the UPS responding correctly to each power situation. The cryogenic control system isolated both the Utility(UV) and insulating(IV) vacuum systems as to preserve their vacua while the pumps were off. Once the vacuum pumps were reestablished the IV and UV vacua were put back on line to their respective pumps by the cryogenic control system. The instrument air is backed up by a high pressure trailer, regulated down to instrument air pressure and switches automatically on line through a check valve. During the time that the instrument air compressor was off, instrument air never went below 80 psig (high pressure regulator setting).

Markley, D.; /Fermilab

1991-01-24T23:59:59.000Z

458

D0 Experimental Area Emergency Backup Power and Generator Test  

SciTech Connect

The DO experimental area has a generator designated as emergency power. This generator provides power for critical loads and starts automatically upon loss of commercial power. This note concerns the testing of this generator. A list of loads is attached to this note. One of the loads on the emergency power grid is a 10KVA Uninterruptable Power Supply(UPS). The UPS powers the cryogenic controls and Oxygen deficiency hazard equipment(ODH) and has a minimum rating of 20 minutes while on its batteries(to cover the transfer time to/from the emergency generator). Jan 23,1991 at 1640 hrs this system was tested under the supervision of the Terry Ross, Marv Johnson, Dan Markley, Kelly Dixon, and John Urbin. The power feeder to the emergency power grid at DO was disconnected. The generator responded immediately and was supplying power to the emergency power grid in less than 10 seconds. During the 10 seconds that there was no power on the emergency grid the UPS switched on its inverter and provided uninterrupted power to the cryogenic control system and the ODH system. All of the motorized equipment shut off instrument air compressor, vacuum pumps 1 and 2, insulating vacuum blower, glycol cooling pumps, cooling tower fan, and Exhaust Fan 7(EF7). Upon reengagement of power to the grid from the emergency generator, all of the motorized loads started back up with the exception of vacuum pumps 1 and 2, and the UPS inverter turned off. Vacuum pumps 1 and 2 were delay started 20 seconds by the cryogenic control system as not to cause too large of a surge in power by all of the inductive loads starting at once. The DO building elevator which is also on emergency power was test run while the emergency generator was on line with all other emergency loads. The emergency generator current was 140 amps with all loads on line and running except the building elevator. This load of 140 amps is 27% of the generator's capacity. The cryogenic control and ODH system continued to function properly throughout the entire test due to the UPS responding correctly to each power situation. The cryogenic control system isolated both the Utility(UV) and insulating(IV) vacuum systems as to preserve their vacua while the pumps were off. Once the vacuum pumps were reestablished the IV and UV vacua were put back on line to their respective pumps by the cryogenic control system. The instrument air is backed up by a high pressure trailer, regulated down to instrument air pressure and switches automatically on line through a check valve. During the time that the instrument air compressor was off, instrument air never went below 80 psig (high pressure regulator setting).

Markley, D.; /Fermilab

1991-01-24T23:59:59.000Z

459

Automatic Interpretation of Human Head Movements  

E-Print Network (OSTI)

This paper describes a complete face tracking system that interprets human head movements in real time. The system combines motion analysis with reliable and efficient object recognition strategies. It classifies head movements as "yes" (nodding head), "no" (shaking head) or "nothing" (still head). The system's skill allows contactless man-machine interaction, thus giving access to a number of new applications. 1 Introduction As industrialization proceeds, the importance of interactions between man and machine increases rapidly. Information flow from machine to man has become comfortable and direct in recent years due to tremendous progresses in computer graphics. Information flow from man to machine, on the other hand, is still on a low level. It is restricted to moving mice, pressing buttons, and typing character sequences on a keyboard. Automatic interpretation of gestures and facial expressions could reduce this imbalance and is therefore of central interrest for current and futu...

Bichsel Pentland; M. Bichsel; A. P. Pentland

1993-01-01T23:59:59.000Z

460

An automatic analysis of Norwegian compounds  

E-Print Network (OSTI)

Introduction The University of Oslo is currently developing an automatic morphosyntactic tagger for Norwegian. 2 A very important module is one which can analyse compounds. Compounding is extremely productive in Norwegian, and it is futile to ever hope for a lexicon (dictionary) that will contain all or even most of the compounds that occr in actual texts. Since the tagger we are developing is based on the possibility of recognising words by the help of a lexicon, it is of great importance to have a module that recognises new compounds. According to Munthe (1972), 10.4 per cent of all words in running text are compounds. Any text sample will contain a greatnumber of compounds. This statistics is true even for small samples. I took an arbitrary 440-word article from the newspaper Aftenposten from September this year, Full penhet om passunion (Full openness on passport union), and I quickly counted 47 compounds. Many of them a

Janne Bondi Johannessen; Helge Hauglin

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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

Automatic Image Orientation Determination with Natural Image Statistics  

E-Print Network (OSTI)

Automatic Image Orientation Determination with Natural Image Statistics Siwei Lyu Dept. of Computer a new method for automatically determining image orientations. This method is based on a set of natural image statistics collected from a multi- scale multi-orientation image decomposition (e.g., wavelets

Lyu, Siwei

462

A Thermostat Fuzzy Control System Based on MCU  

Science Conference Proceedings (OSTI)

A thermostat is an automatic temperature control unit, which operating environment is featuring by non-linear, inertial and time-variant. Traditional control can not achieve satisfied performance. As one large embranchment of non-linear control, fuzzy ...

Chenluan Wang

2009-11-01T23:59:59.000Z

463

Automatic registration of serial mammary gland sections  

SciTech Connect

We present two new methods for automatic registration of microscope images of consecutive tissue sections. They represent two possibilities for the first step in the 3-D reconstruction of histological structures from serially sectioned tissue blocks. The goal is to accurately align the sections in order to place every relevant shape contained in each image in front of its corresponding shape in the following section before detecting the structures of interest and rendering them in 3D. This is accomplished by finding the best rigid body transformation (translation and rotation) of the image being registered by maximizing a matching function based on the image content correlation. The first method makes use of the entire image information, whereas the second one uses only the information located at specific sites, as determined by the segmentation of the most relevant tissue structures. To reduce computing time, we use a multiresolution pyramidal approach that reaches the best registration transformation in increasing resolution steps. In each step, a subsampled version of the images is used. Both methods rely on a binary image which is a thresholded version of the Sobel gradients of the image (first method) or a set of boundaries manually or automatically obtained that define important histological structures of the sections. Then distance-transform of the binary image is computed. A proximity function is then calculated between the distance image of the image being registered and that of the reference image. The transformation providing a maximum of the proximity function is then used as the starting point of the following step. This is iterated until the registration error lies below a minimum value.

Arganda-Carreras, Ignacio; Fernandez-Gonzalez, Rodrigo; Ortiz-de-Solorzano, Carlos

2004-04-13T23:59:59.000Z

464

Simplified distillation column controls  

SciTech Connect

A simple, energy efficient method of controlling single or double distillation columns for the production of ethyl alcohol is described. The control system is based on a material balance scheme centered around a thermostat actuated control valve to regulate reflux rate and product purity. Column bottom's levels are automatically regulated by vented suction lines on the pump inlets. Methods of minimizing control input variations are used including column insulation, stillage-to-beer heat exchanger, and a steam pressure regulator.

Badger, P.; Pile, R.; Lightsey, G.

1984-01-01T23:59:59.000Z

465

Automatic CO/sub 2/ removal system and operation thereof  

SciTech Connect

A system is described for removing CO/sub 2/ from the manufactured process gas in an SNG manufacturing plant, the system operating the hot carbonate process wherein hot potassium carbonate solution absorbs CO/sub 2/ from the process gas under pressure in an absorber column and is regenerated by pressure reduction and steam stripping in a regenerator column and a reboiler before being returned to the absorber by a circulating pump. The system is completely automated and is controlled by a computer so that start-up, running and shut-down of the system is carried out automatically upon initiation by an operator, whereby the system is particularly suited for use in peak load SNG plants. For this purpose the system includes a solution make up tank, a solution storage tank, and a flushing water collection tank, preferably has all of its surfaces contacted by potassium carbonate solution made of stainless steel, and has sensors (F, L, T, P, AN, SG, and PH) and valve switches for transmitting information to the computer relating to the state of the system. The computer is programmed to operate the sequences of operation necessary to achieve the start-up, running and shut down of the system, operate loop controls on the solution levels in the absorber and regenerator columns, and on the rates of flow of solution to the absorber and of steam to the reboiler, and also to monitor the system parameters and to display data and signal alarm conditions.

Adams, K. J. G.; Bolt, N. T.; Siddique, Q. M.; Williams, T. P.

1985-01-01T23:59:59.000Z

466

Distributed Generation  

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

Untapped Value of Backup Generation Untapped Value of Backup Generation While new guidelines and regulations such as IEEE (Institute of Electrical and Electronics Engineers) 1547 have come a long way in addressing interconnection standards for distributed generation, utilities have largely overlooked the untapped potential of these resources. Under certain conditions, these units (primarily backup generators) represent a significant source of power that can deliver utility services at lower costs than traditional centralized solutions. These backup generators exist today in large numbers and provide utilities with another option to reduce peak load, relieve transmission congestion, and improve power reliability. Backup generation is widely deployed across the United States. Carnegie Mellon's Electricity

467

Unbalanced-grid-fault ride-through control for a doubly fed induction generator wind turbine with series grid-side converter  

Science Conference Proceedings (OSTI)

The grid codes now require doubly fed induction generator (DFIG) wind turbines having the "low voltage ride-through (LVRT)" capability. However, a traditional DFIG with a partially rated back-to-back converter has inherent difficulties to ride through ... Keywords: doubly fed induction generator (DFIG), low voltage ride-through (LVRT), series grid-side converter (SGSC), unbalanced grid fault, voltage dips, voltage sags, wind power generation, wind turbine

Yong Liao; Hui Li; Jun Yao

2011-02-01T23:59:59.000Z

468

PULSE SYNTHESIZING GENERATOR  

DOE Patents (OSTI)

>An electronlc circuit for synthesizing electrical current pulses having very fast rise times includes several sinewave generators tuned to progressively higher harmonic frequencies with signal amplitudes and phases selectable according to the Fourier series of the waveform that is to be synthesized. Phase control is provided by periodically triggering the generators at precisely controlled times. The outputs of the generators are combined in a coaxial transmission line. Any frequency-dependent delays that occur in the transmission line can be readily compensated for so that the desired signal wave shape is obtained at the output of the line. (AEC)

Kerns, Q.A.

1963-08-01T23:59:59.000Z

469

CONTROL LIMITER DEVICE  

DOE Patents (OSTI)

A control-limiting device for monltoring a control system is described. The system comprises a conditionsensing device, a condition-varying device exerting a control over the condition, and a control means to actuate the condition-varying device. A control-limiting device integrates the total movement or other change of the condition-varying device over any interval of time during a continuum of overlapping periods of time, and if the tothl movement or change of the condition-varying device exceeds a preset value, the control- limiting device will switch the control of the operated apparatus from automatic to manual control.

DeShong, J.A.

1960-03-01T23:59:59.000Z

470

Design of a 3 kW wind turbine generator with thin airfoil blades  

SciTech Connect

Three blades of a 3 kW prototype wind turbine generator were designed with thin airfoil and a tip speed ratio of 3. The wind turbine has been controlled via two control methods: the variable pitch angle and by regulation of the field current of the generator and examined under real wind conditions. The characteristics of the thin airfoil, called ''Seven arcs thin airfoil'' named so because the airfoil is composed of seven circular arcs, are analyzed with the airfoil design and analysis program XFOIL. The thin airfoil blade is designed and calculated by blade element and momentum theory. The performance characteristics of the machine such as rotational speed, generator output as well as stability for wind speed changes are described. In the case of average wind speeds of 10 m/s and a maximum of 19 m/s, the automatically controlled wind turbine ran safely through rough wind conditions and showed an average generator output of 1105 W and a power coefficient 0.14. (author)

Ameku, Kazumasa; Nagai, Baku M.; Roy, Jitendro Nath [Faculty of Mechanical Engineering, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213 (Japan)

2008-09-15T23:59:59.000Z

471

Application of automatic differentiation for the simulation of nonisothermal, multiphase flow in geothermal reservoirs  

DOE Green Energy (OSTI)

Simulation of nonisothermal, multiphase flow through fractured geothermal reservoirs involves the solution of a system of strongly nonlinear algebraic equations. The Newton-Raphson method used to solve such a nonlinear system of equations requires the evaluation of a Jacobian matrix. In this paper we discuss automatic differentiation (AD) as a method for analytically computing the Jacobian matrix of derivatives. Robustness and efficiency of the AD-generated derivative codes are compared with a conventional derivative computation approach based on first-order finite differences.

Kim, Jong G.; Finsterle, Stefan

2002-01-08T23:59:59.000Z

472

Prototype geothermal power plant summary of operation for automatic-run test phase  

DOE Green Energy (OSTI)

The Prototype Power Plant was built to demonstrate and learn the operation of a binary power cycle, and then serve as a test bed for pilot scale components, systems, and/or concepts that have the potential for enhancing the feasibility of power generation from a moderate temperature geothermal fluid resource. The operation to date of the prototype plant is summarized with primary emphasis on the automatic-run phase, during which the plant was operated over a five-month period with minimal operator surveillance.

Mines, G.L.

1981-02-01T23:59:59.000Z

473

Automatic target recognition apparatus and method  

DOE Patents (OSTI)

An automatic target recognition apparatus (10) is provided, having a video camera/digitizer (12) for producing a digitized image signal (20) representing an image containing therein objects which objects are to be recognized if they meet predefined criteria. The digitized image signal (20) is processed within a video analysis subroutine (22) residing in a computer (14) in a plurality of parallel analysis chains such that the objects are presumed to be lighter in shading than the background in the image in three of the chains and further such that the objects are presumed to be darker than the background in the other three chains. In two of the chains the objects are defined by surface texture analysis using texture filter operations. In another two of the chains the objects are defined by background subtraction operations. In yet another two of the chains the objects are defined by edge enhancement processes. In each of the analysis chains a calculation operation independently determines an error factor relating to the probability that the objects are of the type which should be recognized, and a probability calculation operation combines the results of the analysis chains.

Baumgart, Chris W. (Santa Fe, NM); Ciarcia, Christopher A. (Los Alamos, NM)

2000-01-01T23:59:59.000Z

474

Automatic Parallelization With Statistical Accuracy Bounds  

E-Print Network (OSTI)

Traditional parallelizing compilers are designed to generate parallel programs that produce identical outputs as the original sequential program. The difficulty of performing the program analysis required to satisfy this ...

Kim, Deokhwan

2010-02-10T23:59:59.000Z

475

United Mechanisms for the Generation of Low- and High-Frequency Tropical Waves. Part I: Control Experiments with Moist Convective Adjustment  

Science Conference Proceedings (OSTI)

To examine several mechanisms for the generation of low- and high-frequency tropical waves, numerical experiments are conducted using an idealized nine-level R21 spectral model with the original scheme of moist convective adjustment (MCA). The ...

Y. Hayashi; D. G. Golder

1997-05-01T23:59:59.000Z

476

RENETO, a realistic network traffic generator for OMNeT++/INET  

Science Conference Proceedings (OSTI)

We present in this paper RENETO, a packet-level traffic generator for OMNeT++/INET. In order to achieve realistic traffic behavior, a first tool computes a model by doing an automatic analysis of a real traffic capture. This analysis extracts statistical ... Keywords: network traffic generation, network traffic modeling, pseudo-random number generation

Fabien Geyer, Stefan Schneele, Georg Carle

2013-03-01T23:59:59.000Z

477

Digital slip frequency generator and method for determining the desired slip frequency  

DOE Patents (OSTI)

The output frequency of an electric power generator is kept constant with variable rotor speed by automatic adjustment of the excitation slip frequency. The invention features a digital slip frequency generator which provides sine and cosine waveforms from a look-up table, which are combined with real and reactive power output of the power generator.

Klein, Frederick F. (Monroeville, PA)

1989-01-01T23:59:59.000Z

478

Automated Kinematics Equations Generation and Constrained Motion Planning Resolution for Modular and Reconfigurable Robots  

SciTech Connect

Contrary to the repetitive tasks performed by industrial robots, the tasks in most DOE missions such as environmental restoration or Decontamination and Decommissioning (D&D) can be characterized as ''batches-of-one'', in which robots must be capable of adapting to changes in constraints, tools, environment, criteria and configuration. No commercially available robot control code is suitable for use with such widely varying conditions. In this talk we present our development of a ''generic code'' to allow real time (at loop rate) robot behavior adaptation to changes in task objectives, tools, number and type of constraints, modes of controls or kinematics configuration. We present the analytical framework underlying our approach and detail the design of its two major modules for the automatic generation of the kinematics equations when the robot configuration or tools change and for the motion planning under time-varying constraints. Sample problems illustrating the capabilities of the developed system are presented.

Pin, Francois G.; Love, Lonnie L.; Jung, David L.

2004-03-29T23:59:59.000Z

479

Distributed Generation  

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

with another option to reduce peak load, relieve transmission congestion, and improve power reliability. Backup generation is widely deployed across the United States. Carnegie...

480

Computational Needs for the Next Generation Electric Grid Proceedings  

E-Print Network (OSTI)

F.  Wollenburg, “Power Generation Operation and Control”, Commitment  with  Wind  Power  Generation:  Integrating Optimal investments in  power generation under centralized 

Birman, Kenneth

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "automatic generation control" 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.