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

On The Impact of Communication Delays on Power System Automatic Generation Control Performance  

E-Print Network (OSTI)

and physical components that, under visions such as the US Department of Energy Smart Grid [1], are likely of the smart grid vision. Supervisory control and data acquisition (SCADA) systems, as computer an impact on system metrics, e.g., frequency deviations from its nominal value. The AGC system takes

Liberzon, Daniel

3

On the Failure of Power System Automatic Generation Control due to Measurement Noise  

E-Print Network (OSTI)

of the Supervisory Control and Data Acquisition (SCADA) system that resides in a centralized location (typically of service attacks, and resort to other malicious actions [2]. Various false data detection techniques based PMU measurements by spoofing the clocks that they use for synchronization [7]. Apart from malicious

Liberzon, Daniel

4

Automatic Control Laboratory ETH, Zurich  

E-Print Network (OSTI)

Automatic Control Laboratory ETH, Z¨urich Physikstrasse 3 8092 Z¨urich, Switzerland +41 44 632 22 from the airport to Z¨urich city and goes directly past ETH. There are ticket machines outside 71 How to get to the Automatic Control Laboratory (IfA) From the Z¨urich airport: · By Taxi. Taxi

Lygeros, John

5

Automatic 5-axis NC toolpath generation  

E-Print Network (OSTI)

Despite over a decade of research, automatic toolpath generation has remained an elusive goal for 5-axis NC machining. This thesis describes the theoretical and practical issues associated with generating collision free ...

Balasubramaniam, Mahadevan, 1976-

2001-01-01T23:59:59.000Z

6

Automatic Voltage Control of Electrical Systems  

Science Journals Connector (OSTI)

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

1934-01-20T23:59:59.000Z

7

Automatically Generating Plans for Manufacturing* Billy Harris  

E-Print Network (OSTI)

Automatically Generating Plans for Manufacturing* Billy Harris Diane J. Cook Frank Lewis§ January of action. ORGANIZATION LEVEL COORDINATION LEVEL EXECUTION LEVEL A B S T R A C T I O N P R E C I S I O N

Cook, Diane J.

8

Automatically Generating Symbolic Prefetches for Distributed Transactional Memories  

E-Print Network (OSTI)

Automatically Generating Symbolic Prefetches for Distributed Transactional Memories Alokika Dash static compiler analysis that can automatically generate symbolic prefetches for distributed applications and Brian Demsky University of California, Irvine Abstract. Developing efficient distributed applications

Boyer, Edmond

9

Install an Automatic Blowdown-Control System  

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

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

10

Automatic Parallelization of Hand Written Automotive Engine Control  

E-Print Network (OSTI)

Automatic Parallelization of Hand Written Automotive Engine Control Codes Using OSCAR Compiler Dan approach to realize the next- generation automobiles integrated control system. However, automotive-core processors for a long time. This paper proposes to parallelize an automotive engine crankshaft control

Kasahara, Hironori

11

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

E-Print Network (OSTI)

Automatic Digital Surface Model (DSM) Generation from Linear Array Images A dissertation submitted-examiner Presented by Li Zhang Zurich 2005 #12;IGP Mitteilungen Nr. 88 Automatic Digital Surface Model (DSM-906467-55-4 #12;DISS. ETH NO. 16078 Automatic Digital Surface Model (DSM) Generation from Linear Array Images

Giger, Christine

12

Character String Predicate Based Automatic Software Test Data Generation  

E-Print Network (OSTI)

Character String Predicate Based Automatic Software Test Data Generation Ruilian Zhao Computer is an important element in programming. A problem that needs further research is how to automatically generate generation of program paths including character string predicates, and the effectiveness of this approach

Lyu, Michael R.

13

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)

of Boiler-Turbine-Generator Controls Using Optimal Linear Regulator Theory JOHN P. McDOKALD AND HARRY G of a nonlinear mathematical model of a drum-type, twin furnace, reheat boiler-turbine-generator (RBTG) system- tiveoperatingandcontrolstrategies for boiler-t.urbine- generator systems to meet different, system operating ob- jectives. Among

Kwatny, Harry G.

14

Automatic generation of executable communication specifications from parallel applications  

SciTech Connect

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

15

Query Expansion with an Automatically Generated Thesaurus  

Science Journals Connector (OSTI)

This paper describes a new method to automatically obtain a new thesaurus which exploits previously collected information. Our method ... a text collection, a set of source thesauri and other linguistic resources...

Jos R. Prez-Agera; Lourdes Araujo

2006-01-01T23:59:59.000Z

16

The automatic generation of mutation operators for genetic algorithms  

Science Journals Connector (OSTI)

We automatically generate mutation operators for Genetic Algorithms (GA) and tune them to problem instances drawn from a given problem class. By so doing, we perform metalearning in which the base-level contains GAs (which learn about problem instances), ... Keywords: automatic design, genetic algorithms, genetic programming, hyper-heuristics

John R. Woodward; Jerry Swan

2012-07-01T23:59:59.000Z

17

Jokestega: automatic joke generation-based steganography methodology  

Science Journals Connector (OSTI)

This paper presents a novel steganography methodology, namely Automatic Joke Generation Based Steganography Methodology Jokestega, that pursues textual jokes in order to hide messages. Basically, Jokestega methodology takes advantage of recent advances ...

Abdelrahman Desoky

2012-03-01T23:59:59.000Z

18

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

E-Print Network (OSTI)

Undrill. 1975. "Automatic Generation Control", IEEE Tutorialfraction of generation providing response grid. The adjustment of generation, minute-by- minute, in

Lacommare, Kristina S H

2011-01-01T23:59:59.000Z

19

Automatic generation of built-in contract test drivers  

Science Journals Connector (OSTI)

Automatic generation of platform-independent and -dependent built-in contract test drivers that check pairwise interactions between client and server components is presented, focusing on the built-in contract testing (BIT) method and the model-driven ... Keywords: Built-in contract testing, MDA, Model-driven testing

Everton L. Alves, Patricia D. Machado, Franklin Ramalho

2014-07-01T23:59:59.000Z

20

Green index in semigroups: Generators, presentations, and automatic structures  

E-Print Network (OSTI)

Green index in semigroups: Generators, presentations, and automatic structures Alan J. Cain, Robert@mcs.st-and.ac.uk This is a preprint of the article published as: Semigroup Forum, , no. (), pp. ­. : ./s---. : . The Green index called the relative Schützenberger group. If the Rees index |S \\ T| is finite, T also has finite Green

Cain, Alan J.

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

Development of tools for automatic generation of PLC code  

E-Print Network (OSTI)

This Master thesis was performed at CERN and more specifically in the EN-ICE-PLC section. The Thesis describes the integration of two PLC platforms, that are based on CODESYS development tool, to the CERN defined industrial framework, UNICOS. CODESYS is a development tool for PLC programming, based on IEC 61131-3 standard, and is adopted by many PLC manufacturers. The two PLC development environments are, the SoMachine from Schneider and the TwinCAT from Beckhoff. The two CODESYS compatible PLCs, should be controlled by the SCADA system of Siemens, WinCC OA. The framework includes a library of Function Blocks (objects) for the PLC programs and a software for automatic generation of the PLC code based on this library, called UAB. The integration aimed to give a solution that is shared by both PLC platforms and was based on the PLCOpen XML scheme. The developed tools were demonstrated by creating a control application for both PLC environments and testing of the behavior of the code of the library.

Koutli, Maria; Rochez, Jacques

22

Automatic Patch-Based Exploit Generation is Possible: Techniques and Implications  

E-Print Network (OSTI)

Automatic Patch-Based Exploit Generation is Possible: Techniques and Implications David Brumley@cs.pitt.edu Carnegie Mellon University UC Berkeley & CMU U. Pittsburgh Abstract The automatic patch-based exploit generation prob- lem is: given a program P and a patched version of the program P , automatically generate

Brumley, David

23

Automatic Error Finding in Access-Control Policies  

E-Print Network (OSTI)

Access-control policies are a key infrastructural technology for computer security. However, a significant problem is that system administrators need to be able to automatically verify whether their policies capture the ...

Jayaraman, Karthick

2010-05-05T23:59:59.000Z

24

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 generator. An automatic load sharing approach for a doubly-fed induction generator (DFIG) based wind is useful to manage the load variation of a microgrid. Index Terms--DFIG, load sharing, microgrid, pitch

Pota, Himanshu Roy

25

An Integrated Automatic Test Data Generation System A. Je erson O utt  

E-Print Network (OSTI)

An Integrated Automatic Test Data Generation System A. Je erson O utt Department of Computer Science Clemson University Clemson, SC 29634 January 21, 1996 Abstract The Godzilla automatic test data generator is an integrated collection of tools that implements a relatively new test data generation method

Offutt, Jeff

26

Automatic Control Technology in the HVAC System  

Science Journals Connector (OSTI)

In the field of VAV air-conditioning system (Variable Air Volume, VAV) control theory and practical study, the paper analyzed the methods used by the China's VAV control procedures including Static Pressure Control, Variable Pressure Control and Total ...

Ren Tao; Gao Jingmin; Jia Wenwen

2009-01-01T23:59:59.000Z

27

Fast Automatic Security Protocol Generation Hongbin Zhou Simon N. Foley  

E-Print Network (OSTI)

and relies on the skill of the protocol designer. Saidi [32] proposes a semi-automatic design tool based

Foley, Simon

28

E-Print Network 3.0 - automatic landing control Sample Search...  

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

Chaumette and Jean-Michel Pflimlin Summary: . Subrahmanyam, "H infinity Design of FA-18A Automatic Carrier Landing System," Journal of Guidance, Control... for Automatic...

29

An Integrated Automatic Test Data Generation System A. Jefferson Offutt \\Lambda  

E-Print Network (OSTI)

An Integrated Automatic Test Data Generation System A. Jefferson Offutt \\Lambda Department of Computer Science Clemson University Clemson, SC 29634 January 21, 1996 Abstract The Godzilla automatic test data generator is an integrated collection of tools that implements a relatively new test data

Offutt, Jeff

30

Optimal Demand Response Capacity of Automatic Lighting Control  

E-Print Network (OSTI)

1 Optimal Demand Response Capacity of Automatic Lighting Control Seyed Ataollah Raziei and Hamed-mails: razieis1@udayton.edu and hamed@ee.ucr.edu Abstract--Demand response programs seek to ad- just the normal prior studies have extensively studied the capacity of offering demand response in buildings

Mohsenian-Rad, Hamed

31

Parameter Estimation for Automatic Dose Control in Radioscopy  

E-Print Network (OSTI)

Parameter Estimation for Automatic Dose Control in Radioscopy Daniel Keysers, Sami Celik, Henning of the X-ray dose on this parameter alone leads to incorrect exposure, if direct radiation enters-ray dose needs to be adjusted continuously to the body region examined. In cur- rent systems

Keysers, Daniel

32

Anticipatory control of turbine generators  

E-Print Network (OSTI)

of Turbine Generators. (Nay 1971) Freddie Laurel Nessec, B. S. E. E, , Texas Tech University; Directed by: Professor J. S . Denison An investigation is made of the use of predicted loads in controlling turbine generators. A perturbation model of a turbine... generator is presented along with typical parameter values. A study is made of the effects of applying control action before a load change occurs. Two predictive control schemes are investi- gated using a load cycle which incorporates both ramp and step...

Messec, Freddie Laurel

1971-01-01T23:59:59.000Z

33

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.

34

Optically Controlled Jitter Generator  

E-Print Network (OSTI)

A new simple circuit producing random pulse trains is proposed and experimentally studied. The circuit is composed of an operational amplifier and two feedback links, one of which comprises two photodiodes. The photodiodes are responsible for nonlinearity in the feedback. By varying the illumination it is possible to control the nonlinearity in the photodiode current-voltage characteristics and change the degree of randomness in the oscillations. The circuit's simplicity and optical control make it attractive for coupled map lattices.

Julia Manasson; V. A. Manasson

2006-08-17T23:59:59.000Z

35

Wrapster : semi-automatic wrapper generation for semi-structured websites  

E-Print Network (OSTI)

Many information sources on the Web are semi-structured; hence there is an opportunity for automatic tools to process and extract their information for easy access through a uniform interface language. Wrapper generation ...

Zaccak, Gabriel (Gabriel Gabra)

2007-01-01T23:59:59.000Z

36

E-Print Network 3.0 - automatic test generation Sample Search...  

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

Powered by Explorit Topic List Advanced Search Sample search results for: automatic test generation Page: << < 1 2 3 4 5 > >> 1 WebWeb--CAT User GroupCAT User Group...

37

ShieldGen: Automatic Data Patch Generation for Unknown Vulnerabilities with Informed Probing  

E-Print Network (OSTI)

ShieldGen: Automatic Data Patch Generation for Unknown Vulnerabilities with Informed Probing generating a data patch or a vulnerability signature for an unknown vulnerability, given a zero-day attack. In this paper, we aim to automate this process and enable fast, patch-level pro- tection generation

Locasto, Michael E.

38

IEEE TRANSACTIONS ON AUTOMATIC CONTROL 1 Coverage and Energy Consumption Control in  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON AUTOMATIC CONTROL 1 Coverage and Energy Consumption Control in Mobile Abstract--In this paper 1 , we investigate the coverage and energy consumption control in mobile. Meanwhile, we can operate a tradeoff control between coverage performance and energy consumption

Wang, Xinbing

39

Automatic storm protection control for wind energy system  

SciTech Connect

A wind energy plant is protected against damage from high winds by permitting the propeller assembly thereof to fold with respect to the tail assembly of the plant when the wind velocity with respect to the plant exceeds a predetermined value. Return of the propeller assembly to a wind facing orientation is controlled to prevent oscillating or whipping in gusty or turbulent winds. A safety system is included to control plant shutdown, and automatically shuts down the plant if the plant is being subjected to excessive vibration.

Jacobs, M.L.; Jacobs, P.R.

1981-10-27T23:59:59.000Z

40

E-Print Network 3.0 - automatic process control Sample Search...  

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

Control Lab, KTH. The primary... . Prerequisites: Courses in Automatic Control, MatlabSimulink and general programming skills Contact: Dimos... Dimarogonas, KTH EES...

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

Automatic control in petroleum, petrochemical and desalination industries  

SciTech Connect

This is the second IFAC workshop on the subject of Automatic Control in Oil and Desalination Industries. Presentations and discussions underscored the priorities of oil and desalination industries in getting better overall quality, improved energy use, lower cost, and better safety and security. These factors will take on added importance to oil exporting nations that have been hit recently by large oil price declines, which are forcing them to improve the efficiency of their industries and rationalize all new capital expenditures. Papers presented at the workshop included reviews of theoretical developments in control and research in modelling, optimization, instrumentation and control. They included the latest developments in applications of control systems to petroleum, petrochemical and desalination industries such as refineries, multi-stage flash desalination, chemical reactors, and bioreactors. The papers covered the latest in the applications of adaptive control, robust control, decentralized control, bilinear control, measurement techniques, plant optimization and maintenance, and artificial intelligence. Several case studies on modernization of refineries and controls and its economics were included. Two panel discussions, on new projects at the Kuwait National Petroleum Company (KNPC) and needs for control systems were held. Participation in the workshop came from the oil industry and academic institutions.

Kotob, S.

1986-01-01T23:59:59.000Z

42

E-Print Network 3.0 - automatic train control Sample Search Results  

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

Powered by Explorit Topic List Advanced Search Sample search results for: automatic train control Page: << < 1 2 3 4 5 > >> 1 ENVIRONMENT, SAFETY & HEALTH DIVISION 15 February...

43

E-Print Network 3.0 - automatic headway control Sample Search...  

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

Electrical Engineering, University of Southern California Collection: Engineering 14 3. Train Control and Signaling 3.1 INTRODUCTION Summary: , with automatic train stops. These...

44

Computer-controlled time-interval generator for pulse EPR relaxometer  

SciTech Connect

This paper describes a time-interval generator with eleven output channels; the generator is controlled by an Elektronika D3-28 computer. High flexibility in the shaping of various pulse combinations allows automatic control of the EPR relaxometer under all research conditions. A maximum of 16 intervals can be generated in each channel. The interval range is 1 usec to 4 X 10/sup 3/ sec. The generator can also be used to control other pulse instruments for physics experiments.

Safonov, S.D.; Dudkov, V.N.; Ivanov, V.G.; Muromtsev, V.I.; Nyrtsov, I.V.; Sukharev, V.N.

1986-06-01T23:59:59.000Z

45

Automatic generation and analysis of solar cell IV curves  

SciTech Connect

A photovoltaic system includes multiple strings of solar panels and a device presenting a DC load to the strings of solar panels. Output currents of the strings of solar panels may be sensed and provided to a computer that generates current-voltage (IV) curves of the strings of solar panels. Output voltages of the string of solar panels may be sensed at the string or at the device presenting the DC load. The DC load may be varied. Output currents of the strings of solar panels responsive to the variation of the DC load are sensed to generate IV curves of the strings of solar panels. IV curves may be compared and analyzed to evaluate performance of and detect problems with a string of solar panels.

Kraft, Steven M.; Jones, Jason C.

2014-06-03T23:59:59.000Z

46

Automatic Generation of Transaction-Level Models for Rapid Design Space Exploration  

E-Print Network (OSTI)

Automatic Generation of Transaction-Level Models for Rapid Design Space Exploration Dongwan Shin space, designers use models which are evaluated through simulation. Typically, these models are manually accuracies, models are written at low levels of abstraction with resulting slow simulation performance

California at Irvine, University of

47

Automatic and interactive e-Learning auxiliary material generation utilizing particle swarm optimization  

Science Journals Connector (OSTI)

The purpose of this research was to utilize a PSO-based algorithm, serial blog article composition particle swarm optimization (SBACPSO) algorithm, to automatically and intelligently generate auxiliary materials. Contrary to previous fixed content auxiliary ... Keywords: Auxiliary material, RSS, Serial blog articles composition particle swarm optimization, e-Learning

Tien-Chi Huang; Yueh-Min Huang; Shu-Chen Cheng

2008-11-01T23:59:59.000Z

48

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

E-Print Network (OSTI)

model and to assess the difficulty of such a process in a realistic case study. The steam boiler caseRevisiting the Steam-Boiler Case Study with LUTESS : Modeling for Automatic Test Generation Grenoble, 2Laboratoire de Conception et d'Intégration des Systèmes Abstract LUTESS is a testing tool

Boyer, Edmond

49

Automatically generating information from a Z speci cation to support the Classi cation Tree  

E-Print Network (OSTI)

Automatically generating information from a Z speci#12;cation to support the Classi#12;cation Tree, Brunel University, Uxbridge, Middlesex, UB8 3PH, UK 2 DaimlerChrysler AG, Research Information. The Classi#12;cation Tree Method provides a exible basis for systematic testing. Traditionally

Singer, Jeremy

50

Automatic diagnosis and control of distributed solid state lighting systems  

Science Journals Connector (OSTI)

This paper describes a new design concept of automatically diagnosing and compensating LED degradations in distributed solid state lighting (SSL) systems. A failed LED may...

Dong, Jianfei; van Driel, Willem; Zhang, Guoqi

2011-01-01T23:59:59.000Z

51

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.

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

52

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

53

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

54

E-Print Network 3.0 - automatic cruise control Sample Search...  

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

automatic cruise control Page: << < 1 2 3 4 5 > >> 1 Crossover analysis toolbox for matlab This set of m-files were created and developed during the secondary quality control of...

55

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

56

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

57

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

58

Automatic Generation of Data Types for Classification of Deep Web Sources  

SciTech Connect

A Service Class Description (SCD) is an effective meta-data based approach for discovering Deep Web sources whose data exhibit some regular patterns. However, it is tedious and error prone to create an SCD description manually. Moreover, a manually created SCD is not adaptive to the frequent changes of Web sources. It requires its creator to identify all the possible input and output types of a service a priori. In many domains, it is impossible to exhaustively list all the possible input and output data types of a source in advance. In this paper, we describe machine learning approaches for automatic generation of the data types of an SCD. We propose two different approaches for learning data types of a class of Web sources. The Brute-Force Learner is able to generate data types that can achieve high recall, but with low precision. The Clustering-based Learner generates data types that have a high precision rate, but with a lower recall rate. We demonstrate the feasibility of these two learning-based solutions for automatic generation of data types for citation Web sources and presented a quantitative evaluation of these two solutions.

Ngu, A H; Buttler, D J; Critchlow, T J

2005-02-14T23:59:59.000Z

59

Application of multi-variable control for automatic frequency controller of HVDC transmission system  

SciTech Connect

In an HVDC transmission system that links two ac power systems, the automatic frequency controller (AFC) calculates power to be interchanged between the two ac systems according to their frequencies thereby improving the frequency characteristics of the two power systems. This paper introduces a newly developed dc AFC system, which applies a multi-variable control to the dc system-based frequency control. It is capable of controlling the frequencies of the two ac systems optimally while maintaining their stability. This system was developed for one of Japan's HVDC transmission facilities and produced good results in a combined test using a power system simulator. The field installation will be completed in March 1993, when the AFC system will enter service.

Sanpei, Masatoshi (Electric Power Development Co., Tokyo (Japan)); Kakehi, Atsuyuki; Takeda, Hideo (Toshiba Corp., Tokyo (Japan))

1994-04-01T23:59:59.000Z

60

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 59, NO. 5, MAY 2014 1147 Stochastic Sensor Scheduling for  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 59, NO. 5, MAY 2014 1147 Stochastic Sensor Scheduling--Optimal sensor scheduling with applications to net- worked estimation and control systems is considered. We model approach to optimal control of Markov chains, we extract an optimal scheduling policy to fairly allocate

Johansson, Karl Henrik

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

PWR's xenon oscillation control through a fuzzy expert system automatically designed by means of genetic programming  

Science Journals Connector (OSTI)

This work proposes the use of genetic programming (GP) for automatic design of a fuzzy expert system aimed to provide the control of axial xenon oscillations in pressurized water reactors (PWRs). The control methodology is based on three axial offsets ... Keywords: Axial xenon oscillations control, Fuzzy logic, Genetic programming

Roberto P. Domingos; Gustavo H. F. Caldas; Cludio M. N. A. Pereira; Roberto Schirru

2003-12-01T23:59:59.000Z

62

Weak measurement and control of entanglement generation  

E-Print Network (OSTI)

In this paper we show how weak joint measurement and local feedback can be used to control entanglement generation between two qubits. To do this, we make use of a decoherence free subspace (DFS). Weak measurement and feedback can be used to drive the system into this subspace rapidly. Once within the subspace, feedback can generate entanglement rapidly, or turn off entanglement generation dynamically. We also consider, in the context of weak measurement, some of differences between purification and generating entanglement.

Charles D. Hill; J. F. Ralph

2008-01-28T23:59:59.000Z

63

Automatically controlled wind propeller and tower shadow eliminator  

SciTech Connect

A propeller hub carries pivotally-mounted blades that are linked to a spring-loaded collar on the propeller shaft for automatic coning and feathering under predetermined high velocity movement along the propeller shaft to change the blade pitch angle during low wind velocity conditions. An airfoil support mounts a propeller shaft and turns therewith to reduce tower shadow effects. This is called a ''down-wind system'' meaning the propeller is behind the tower and causes the assembly to rotate into the wind without a tail vane.

Randolph, A.J.

1982-01-12T23:59:59.000Z

64

A proposed system to automatically control audio sound-to-noise levels  

E-Print Network (OSTI)

A PROPOSED SYSTEM TO AUTOMATICALLY CONTROL AUDIO SOUND TO NOISE LEVELS A Thesis ~ ]3y GARY 8% NEINAST Submitted to the Graduate Sohool of the Agrioultural and Meohanioal College of Texas in partial fulfillment of the requirements... for the degree oi' MASTER OP SCIENCE August 1957 Major Sub]eot'f Eleotrioal Engineering A PROPOSED SYSTEM TO AUTOMATICALLY CONTROL AUDIO SOUND-TO-NOISE LEVELS k Thesis QARY S. NEINAST Approved as to style and content by& islay a FBNR o 0 ee e epsx' ne...

Neinast, Gary Strickland

2012-06-07T23:59:59.000Z

65

Optimization of neural network feedback control systems using automatic differentiation  

E-Print Network (OSTI)

Optimal control problems can be challenging to solve, whether using analytic or numerical methods. This thesis examines the application of an adjoint method for optimal feedback control, which combines various algorithmic ...

Rollins, Elizabeth, S.M. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

66

AUTOMATIC VARIABLE VENTILATION CONTROL SYSTEMS BASED ON AIR QUALITY DETECTION  

E-Print Network (OSTI)

Control Systems Based on Air Quality Detection Isaac Turiel,HVAC CONTROL SYSTEM BASED ON AIR QUALITY SENSING To Zl)(lecontrol systems based on air quality detection Isaac Turiel,

Turiel, Isaac

2011-01-01T23:59:59.000Z

67

Optimal design of a robust discrete parallel FP+FI+FD controller for the Automatic Voltage Regulator system  

Science Journals Connector (OSTI)

Abstract The purpose of this paper is to design a good tracking controller for the generator Automatic Voltage Regulator (AVR) system. A fuzzy logic-based controller that is called Fuzzy P+Fuzzy I+Fuzzy D (FP+FI+FD) controller has been designed optimally and applied to AVR system. In the proposed method, optimal tuning of controller parameters is very important to achieve the desired level of robust performance. Thus, a hybrid of Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) (HGAPSO) technique has been used to find a better fuzzy system control. The motivation for using this hybrid method is to increase disturbance rejection effort, reduce fuzzy system efforts and take large parametric uncertainties into account. The developed FP+FI+FD control strategy leads to a flexible controller with simple structure that is easy to implement. The simulation results have been compared with the conventional ProportionalIntegralDerivative (PID) and fuzzy PID controllers. Three cases of simulation have been performed, case 1: comparing the tracking capability of the controllers, case 2: comparing the disturbance rejection capability of the controller and case 3: evaluating the performance of the controllers assuming that amplifier and exciter system parameters have 50% uncertainty. The simulation results shows that the proposed parallel FP+FI+FD controller has good performance from the perspective of overshoot/undershoot, settling time, and rise time in comparison with both conventional and fuzzy PID controllers.

H. Shayeghi; A. Younesi; Y. Hashemi

2015-01-01T23:59:59.000Z

68

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

E-Print Network (OSTI)

1st International Conference on Machine Control & Guidance 2008 1 Automatic Guidance of Track Laying Machines with Respect to Coordinate Systems Th. ENGEL*, JJ. STUBY, Ch. GLAUSER, P. G?LDENAPFEL machine guidance, this text focuses on presenting and solving three challenges without which coordinate

69

Experimental Automatic Lateral Control System For An Automobile  

E-Print Network (OSTI)

Control System for an Automobile Huei Peng, Wei-Bin Zhang,system for a full scaled automobile. Previous PATH programsystem for steering on an automobile. Due to their mutual

1992-01-01T23:59:59.000Z

70

Call for Papers IEEE TRANSACTIONS ON AUTOMATIC CONTROL  

E-Print Network (OSTI)

of applications, such as, environmental control, event detection and suppression, home automation facilitated and enhanced the automated, remote, and intelligent monitoring of a large variety of physical of application domains from industrial and building automation, to environmental, wildlife, and health

Goldberg, Bennett

71

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

72

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

73

E-Print Network 3.0 - automatic mesh generation Sample Search...  

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

35 A Comparison of Delaunay-Based Meshing Algorithms for Electrophysical Cardiac Simulation Summary: . In particular, a number of software packages for automatic mesh...

74

Demonstrating and Validating a Next Generation Model-Based Controller...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

and Validating a Next Generation Model-Based Controller for Fuel Efficient, Low Emissions Diesel Engines Demonstrating and Validating a Next Generation Model-Based Controller for...

75

Digital gate pulse generator for cycloconverter control  

DOE Patents (OSTI)

The present invention provides a digital gate pulse generator which controls the output of a cycloconverter used for electrical power conversion applications by determining the timing and delivery of the firing pulses to the switching devices in the cycloconverter. Previous gate pulse generators have been built with largely analog or discrete digital circuitry which require many precision components and periodic adjustment. The gate pulse generator of the present invention utilizes digital techniques and a predetermined series of values to develop the necessary timing signals for firing the switching device. Each timing signal is compared with a reference signal to determine the exact firing time. The present invention is significantly more compact than previous gate pulse generators, responds quickly to changes in the output demand and requires only one precision component and no adjustments.

Klein, Frederick F. (Monroeville, PA); Mutone, Gioacchino A. (Pleasant Hills, PA)

1989-01-01T23:59:59.000Z

76

Simple automatic supervisory control system for office building based on energy-saving decoupling indoor comfort control  

Science Journals Connector (OSTI)

Abstract This work proposes a simple automatic supervisory control system (ASCS) that is based on an energy-saving decoupling indoor comfort control (ESDICC) for regulating the indoor comforts of an office building. Three energy-saving indoor comfort control algorithms are modified to yield the ESDICC algorithms. The ESDICC-based ASCS is modeled using a Petri net (PN), whose graph is presented in detail and whose dynamics are thoroughly described. Results of two test cases demonstrate the simplicity of the operations of ESDICC-based ASCS and the energy-saving effect of the ESDICC algorithms.

Shin-Yeu Lin; Shih-Ching Chiu; Wei-Yuan Chen

2015-01-01T23:59:59.000Z

77

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 58, NO. 12, DECEMBER 2013 2995 An Optimal Approximate Dynamic Programming  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 58, NO. 12, DECEMBER 2013 2995 An Optimal Approximate rates and the stock market (the low-dimensional exogenous state). · Each week a state has to make

Powell, Warren B.

78

Magnetic bearings for automatic control system of electromagnetic suspension of rotors of turbo-group gas-turbine thermal stations  

Science Journals Connector (OSTI)

A brief overview of suspensions is given. The type of suspension for rotors of turbogenerators is chosen. An automatic control system is developed for an electromagnetic suspension of the radial and axial magn...

I. V. Zotov; V. G. Lisienko

2010-03-01T23:59:59.000Z

79

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

80

Dynamic modelling of MSF plants for automatic control and simulation purposes: a survey  

Science Journals Connector (OSTI)

The successful development of a control system requires an appropriate definition of the control structure (i.e., selection of output, input and disturbance variables) and an efficient dynamical model on which the design, analysis and evaluation can be carried out. Thus, the confidence in the obtained results depends on the validity of the control structure and of the model used. For multistage flash (MSF) desalination processes, several dynamical models can be found in the literature. However, most of them are not suitable for analysis and control design purposes because they bring too many variables into play. The variables, which are sharing in the control system, normally constitute a reduced subset of the total variables that can be defined in the process. Moreover, a dynamical model suitable for control is simpler than the model derived from the physics of the underlying process. Hence, the selection of variables and the model building from the point of view of control design presents a compromise between the indispensable information contained in the model and the mathematical complexity proper of the design. In this paper, different models from the literature are analysed. Their advantages and drawbacks are described taking into account simulation and automatic control purposes. Moreover, a set of wished modelling facilities from the control engineer point of view is highlighted. Finally, a block-oriented library for Matlab/Simulink is presented, so that different plant configurations can be implemented as block diagram to simulate the system and to test control algorithms.

Adrian Gambler; Essameddin Badreddin

2004-01-01T23:59:59.000Z

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

An automatic method to generate force-field parameters for hetero-compounds  

Science Journals Connector (OSTI)

A method has been developed that automatically constructs a crystallographic refinement force field (topology and parameter files) for any molecule from a theoretical frequency calculation. The approach has been tested on five proteins containing metal sites or non-standard inhibitors or coenzymes and it is shown that the structures are improved in various aspects.

Nilsson, K.

2003-01-24T23:59:59.000Z

82

PWR's xenon oscillation control through a fuzzy expert system automatically designed by means of genetic programming  

Science Journals Connector (OSTI)

This work proposes the use of genetic programming (GP) for automatic design of a fuzzy expert system aimed to provide the control of axial xenon oscillations in pressurized water reactors (PWRs). The control methodology is based on three axial offsets of xenon (AOx), iodine (AOi) and neutron flux (AOf), effectively used in former work. Simulations were made using a two-point xenon oscillation model, which employs the non-linear xenon and iodine balance equations and the one group, one-dimensional neutron diffusion equation, with non-linear power reactivity feedback, also proposed in the literature. Results have demonstrated the ability of the GP in finding a good fuzzy strategy, which can effectively control the axial xenon oscillations.

Roberto P. Domingos; Gustavo H.F. Caldas; Cludio M.N.A. Pereira; Roberto Schirru

2003-01-01T23:59:59.000Z

83

Next Generation Diesel Engine Control | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Diesel Engine Control Next Generation Diesel Engine Control Presentation given at the 2007 Diesel Engine-Efficiency & Emissions Research Conference (DEER 2007). 13-16 August, 2007,...

84

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. AC-20, NO. 6, DECEMBER 1975 127 Acoustics, Stability, and Compensation in Boiling  

E-Print Network (OSTI)

of turbine bypass valves duringstart-up as well asduringand following rapid closure of the turbine admissionIEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. AC-20, NO. 6, DECEMBER 1975 127 Acoustics, Stability of steam pipe acoustics on the control of steam pressore in boiling waterreactors. A madel is developed

Kwatny, Harry G.

85

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.

86

Emission reduction of NOx and CO by optimization of the automatic control system in a coal-fired stoker boiler  

SciTech Connect

To date research on NO, and CO emission reduction in stoker-fired boilers has been devoted to combustion modification to the overfire air, diverting air to a selected set of burners, using modified low-NOx, burners, using flue gas recirculation or flue gas treatment with specially controlled catalyst and additives. This study introduces a concept that focuses on the dynamics of the boiler and the automatic control system. The objective of this study was to reduce the NO and CO emissions by restructuring the automatic control system and then tuning the control system with parameters that have been optimized with emission reduction as the objective. Dynamic data were obtained from a step-input test of either the underfire air or the overfire air. These data were used to model the boiler with a transfer function describing the emissions. The analyzer dynamic response was included in the overall model. The control parameters were determined from this overall emissions transfer function by mathematical optimization. These control parameters constituted the initial values in the automatic control system used for the final tests in the boiler. Additional adjustments to reduce the emissions were carried out during boiler operation. A low controller gain and a fast reset time were found to be the most suitable setting for the control system. The NO emissions controlled by the overfire air and CO emissions controlled by the underfire air produced the best results.

Schnelle, K.B.; Laungphairojana, A.; Debelak, K.A. [Vanderbilt University, Nashville, TN (United States). Dept. of Chemical Engineering

2006-07-15T23:59:59.000Z

87

Variable susceptance excitation control for dynamic performance improvement of a stand-alone wind turbine induction generator system  

Science Journals Connector (OSTI)

Isolated wind farms employ simple squirrel cage induction generators driven by variable speed wind turbines. Lacking control capability, such generation can contribute very little to network support. Wind turbines mostly do not take part in voltage and frequency control and if a disturbance occurs, the turbines may be disconnected and reconnected when normal operation has been resumed. From operation viewpoint, this is definitely not acceptable. A primary reason for the rigidity of operation is the lack of excitation adaptation under variable wind conditions. This article proposes incorporation of a variable capacitance controller at the generator terminal which will automatically adjust the needed excitation. Further improvement of transient profile of the stand-alone wind turbine generator has been proposed through inclusion of additional stabilising control. Simulation studies show that the proposed excitation controller with additional PID circuit provides very good transient profile following reasonable input torque variations.

A.H.M.A. Rahim; M. Ahsanul Alam

2009-01-01T23:59:59.000Z

88

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.

89

Power and Voltage Smooth Control of Doubly Fed Induction Generator  

Science Journals Connector (OSTI)

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

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

2012-07-01T23:59:59.000Z

90

Original article: An automatic unstructured grid generation method for viscous flow simulations  

Science Journals Connector (OSTI)

High aspect-ratio grids are required for accurate solution of boundary layer and wake flow. An approach for the efficient generation of isotropic and stretched viscous unstructured grids is introduced in this paper. The proposed grid generation algorithm ... Keywords: Stretched cells, Unstructured grid, Viscous layers

Seyed Saied Bahrainian; Zahra Mehrdoost

2012-09-01T23:59:59.000Z

91

Control Strategy for Wind and Solar Hybrid Generation System  

Science Journals Connector (OSTI)

Solar energy and wind energy are the two most viable renewable ... . This paper presents a control strategy for wind & solar hybrid power generating systems. If the power generation sources produce more ... strat...

Xin Gao

2011-01-01T23:59:59.000Z

92

Automotive Thermoelectric Generator (TEG) Controls | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

(TEG) Fuel Displacement Potential using Engine-in-the-Loop and Simulation Automotive Thermoelectric Generator Design Issues Benefits of Thermoelectric Technology for the Automobile...

93

Power Electronic Control for Wind Generation Systems  

Science Journals Connector (OSTI)

...? mathematical models for wind turbines such as wind turbine (WT) with doubly fed induction generator (DFIG) and WT with direct-drive permanent magnet...

Xiao-Ping Zhang; Christian Rehtanz

2012-01-01T23:59:59.000Z

94

Automatic Gain Control in Mass Spectrometry using a Jet Disrupter Electrode in an Electrodynamic Ion Funnel  

SciTech Connect

We report on the use of a jet disrupter electrode in an electrodynamic ion funnel as an electronic valve to regulate the intensity of the ion beam transmitted through the interface of a mass spectrometer in order to perform automatic gain control (AGC). The ion flux is determined by either directly detecting the ion current on the conductance limiting orifice of the ion funnel or using a short mass spectrometry acquisition. Based upon the ion flux intensity, the voltage of the jet disrupter is adjusted to alter the transmission efficiency of the ion funnel to provide a desired ion population to the mass analyzer. Ion beam regulation by an ion funnel is shown to provide an unbiased control to within a few percent of a targeted ion intensity or abundance. The utility of ion funnel AGC was evaluated using a protein tryptic digest analyzed with liquid chromatography Fourier transform ion cyclotron resonance (LC-FTICR) mass spectrometry. The ion population in the ICR cell was accurately controlled to a variety of different levels, which improved data quality and provided better mass measurement accuracy.

Page, Jason S.; Bogdanov, Bogdan; Vilkov, Andrey N.; Prior, David C.; Buschbach, Michael A.; Tang, Keqi; Smith, Richard D.

2005-02-01T23:59:59.000Z

95

Embedding Google Maps APIs into WebRatio for the Automatic Generation of Web GIS Applications  

Science Journals Connector (OSTI)

The success of WebML (Web Modeling Language) and of the supporting tool WebRatio for designing and generating data-intensive web applications suggested us to extend the approach to the Web GIS context. The propos...

Giuseppe Avagliano; Sergio Di Martino

2008-01-01T23:59:59.000Z

96

Automatic Sensitivity Analysis of DAE-systems Generated from Equation-Based Modeling Languages  

Science Journals Connector (OSTI)

This paper aims at sensitivity analysis of differential algebraic equation (DAE) systems, generated from mathematical models, specified in equation-based modeling languages. Modern simulation languages (e.g. M...

Atya Elsheikh; Wolfgang Wiechert

2008-01-01T23:59:59.000Z

97

Voltage controlled stand-alone microhydro induction generator system  

Science Journals Connector (OSTI)

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

K.A. Nigim

2005-01-01T23:59:59.000Z

98

Design and analysis of a laser oriented, automatic dimensional inspection system for high-speed process control  

E-Print Network (OSTI)

DESIGN AND ANALYSIS OP A LASER ORIENTED, AUTOMATIC DIMENSIONAI INSPECTION SYSTEM FOR HIGH-SPEED PROCESS CONTROL A Thesis by STEVEN MORRIS WARD Submitted to the Graduate College of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE May 1/72 Major Subjects Industrial Engineering DESIGN AND ANALYSIS OF A LASER ORIENTED, AUTONATIC DIMENSIONAL INSPECTION SYSTEN FOR HIGH-SPEED PROCESS CONTROL A Thesis by STEVEN NORRIS WARD Approved...

Ward, Steven Morris

2012-06-07T23:59:59.000Z

99

Automatic rule generation for procedural modeling of a sketched tree using genetic  

E-Print Network (OSTI)

, The algorithmic beauty of plants, Springer- Verlag, 1996. P.Tan, G. Zeng, J. Wang, S. Kang, and L. Quan, Image efficiency. · Dynamism (i.e. growth process). · Scalability (i.e. growth level). · Portability. · Generating) Mathematical theory of plant development. The central concept is rewriting. Defining complex objects

Lee, WonSook

100

Automatic code generation enables nuclear gradient computations for fully internally contracted multireference theory  

E-Print Network (OSTI)

Analytical nuclear gradients for fully internally contracted complete active space second-order perturbation theory (CASPT2) are reported. This implementation has been realized by an automated code generator that can handle spin-free formulas for the CASPT2 energy and its derivatives with respect to variations of molecular orbitals and reference coefficients. The underlying complete active space self-consistent field and the so-called Z-vector equations are solved using density fitting. With full internal contraction the size of first-order wave functions scales polynomially with the number of active orbitals. The CASPT2 gradient program and the code generator are both publicly available. This work enables the CASPT2 geometry optimization of molecules as complex as those investigated by respective single-point calculations.

MacLeod, Matthew K

2015-01-01T23:59:59.000Z

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.


101

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, YOLo AC-31, NO.9, SEPTEMBER1986 803 JOHN N. TSITSIKLIS, MEMBER,IEEE,DIMITRI P. BERTSEKAS, FELLOW,IEEE,ANDMICHAEL ATHANS, FELLOW,IEEE  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, YOLo AC-31, NO.9, SEPTEMBER1986 803 JOHN N. TSITSIKLIS #12;IEEETRANSACTIONS ON AUTOMATIC CONTROL, YOLo AC-31, NO.9. SEPTEMBER1986 804 in (2

Androulakis, Ioannis (Yannis)

102

Automatic playlist generation based on tracking users listening habits  

Science Journals Connector (OSTI)

It would be difficult to discuss the proposed models without an idea of their place in a real application. The proposed models can be a part of a media player, or part of a software that controls any device for listening

Andreja Andric; Goffredo Haus

2006-06-01T23:59:59.000Z

103

Automatic Topology Generation for a Class of Wireless Networks Raghuraman Rangarajan and Sridhar Iyer  

E-Print Network (OSTI)

. The heuristic tool considers the nodes to be deployed, their characteristics and abstract deployment scenarios control. The successful deployment of 802.11 WLAN s has demon- strated that internet/intranet connectivity and their as- sociated characteristics (number of links, application traffic etc.), an abstract graph

Iyer, Sridhar

104

Pacies (Part Code Identification Expert System): an expert system to generate part codes for the selection of small part feeding and orienting devices for use in automatic assembly  

E-Print Network (OSTI)

PACIES (PART CODE IDENTIFICATION EXPERT SYSTEM): AN EXPERT SYSTEM' TO GENERATE PART CODES FOR THE SELECTION OF SMALL PART FEEDING AND ORIENTING DEVICES FOR USE IN AUTOMATIC ASSEMBLY A Thesis by YU-TONG CHEN Submitted to the Graduate College... of Texas AAM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1985 Major Subject: Industrial Engineering PACIES (PART CODE IDENTIFICATION EXPERT SYSTEM): AN EXPERT SYSTEM TO GENERATE PART CODES...

Chen, Yu-Tong

2012-06-07T23:59:59.000Z

105

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.

106

Clock-controlled generators with large period output sequences  

Science Journals Connector (OSTI)

Clock-controlled generators are a kind of pseudo-random number generators (PRNG). Recently, some clock-controlled generators based on jumping Linear Finite State Machines (LFSMs) have been proposed, such as Pomaranch and MICKEY. The period and the linear complexity of their output sequences need to be large enough to provide security against linear attacks. In this paper, a new condition for the period to reach its maximal value is presented. The condition is better than the previous one. Further, some clock-controlled generators are considered, including a new generator which uses a Feedback with Carry Shift Register (FCSR) as the control register. How to maximise the period of their output sequences is investigated.

Zhiqiang Lin

2014-01-01T23:59:59.000Z

107

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 49, NO. 5, MAY 2004 757 [3] R. Kelly, "Comments on adaptive PD controller for robot manipulators,"  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 49, NO. 5, MAY 2004 757 [3] R. Kelly, "Comments Jacobian," in Proc. Robotic Research: 5th Int. Symp., 1990, pp. 201­208. [8] R. Kelly, "Global positioning., vol. 43, pp. 934­938, July 1998. [9] R. Kelly, "Regulation of manipulators in generic task space

Ge, Shuzhi Sam

108

Intelligent-controlled doubly fed induction generator system using PFNN  

Science Journals Connector (OSTI)

An intelligent-controlled doubly fed induction generator (DFIG) system using probabilistic fuzzy neural network ( ... the transient and steady-state responses of the DFIG system at different operating conditions....

Faa-Jeng Lin; Yi-Sheng Huang; Kuang-Hsiung Tan

2013-06-01T23:59:59.000Z

109

Analysis of results obtained using the automatic chemical control of the quality of the water heat carrier in the drum boiler of the Ivanovo CHP-3 power plant  

Science Journals Connector (OSTI)

Results of industrial tests of the new method used for the automatic chemical control of the quality of boiler water of the drum-type power boiler (P d = 13.8 MPa) are described. The possibility o...

A. B. Larin; A. V. Kolegov

2012-10-01T23:59:59.000Z

110

Automatic control systems for gas-turbine units in mini power stations: Testing automation at the stages of design and tuning  

Science Journals Connector (OSTI)

This paper presents the testing automation procedure for automatic control systems of gas-turbine units used as drives in small-size power stations. We substantiate the applicability of mathematical modeling...

B. V. Kavalerov

2013-11-01T23:59:59.000Z

111

Distributed Medium Access Control for Next Generation CDMA Wireless Networks  

E-Print Network (OSTI)

Distributed Medium Access Control for Next Generation CDMA Wireless Networks Hai Jiang, Princeton wireless networks are expected to have a simple infrastructure with distributed control. In this article, we consider a generic distributed network model for future wireless multi- media communications

Zhuang, Weihua

112

Robot Chemist Analyzes Automatically  

Science Journals Connector (OSTI)

Robot Chemist Analyzes Automatically ... Automatic control of a variety of routine analytical procedures is possible with equipment now available from Research Specialties, Richmond, Calif., under the general term "robot chemist." ... The robot chemist is a system of modules which can be connected in many ways to control all steps from measurement of the sample to recording of the data. ...

1960-06-13T23:59:59.000Z

113

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

114

Design of improved controller for thermoelectric generator used in distributed generation  

Science Journals Connector (OSTI)

This paper investigates the application of thermal generation based on solid-state devices such as thermoelectric generators (TEGs) as a novel technological alternative of distributed generation (DG). The full detailed modeling and the dynamic simulation of a three-phase grid-connected TEG used as a dispersed generator is studied. Moreover, a new control scheme of the TEG is proposed, which consists of a multi-level hierarchical structure and incorporates a maximum power point tracker (MPPT) for better use of the thermal resource. In addition, reactive power compensation of the electric grid is included, operating simultaneously and independently of the active power generation. Validation of models and control schemes is performed by using the MATLAB/Simulink environment. Moreover, a small-scale TEG experimental set-up was employed to demonstrate the accuracy of proposed models.

M.G. Molina; L.E. Juanic; G.F. Rinalde; E. Taglialavore; S. Gortari

2010-01-01T23:59:59.000Z

115

Closed Loop Speed Control of Induction Generator with Scalar-control Inverters  

Science Journals Connector (OSTI)

Abstract A closed loop speed control for an induction generator is presented. The system was developed for a space vector modulation-voltage source inverter and the three-phase squirrel-cage induction generator to regulate speed and generator voltages with scalar control technique. The aim of this research was to a generated voltage with a constant speed at variable mechanical torque of prime mover. The simulation results show a good performance of the system can be achieved by the proposed speed controller.

Anaphat Upasan; Yuttana Kumsuwan

2013-01-01T23:59:59.000Z

116

Hydrologic conditions controlling runoff generation immediately after wildfire  

E-Print Network (OSTI)

Hydrologic conditions controlling runoff generation immediately after wildfire Brian A. Ebel,1 John and hydraulic properties of soil, hydrologic states, and an ash layer immediately following wildfire. The field site is within the area burned by the 2010 Fourmile Canyon Fire in Colorado, USA. Physical

117

Control momentum entanglement with atomic spontaneously generated coherence  

E-Print Network (OSTI)

With atomic spontaneously generated coherence (SGC), we propose a novel scheme to coherently control the atom--photon momentum entanglement through atomic internal coherence. A novel phenomena of ``phase entanglement in momentum'' is proposed, and we found, under certain conditions, that super--high degree of momentum entanglement can be produced with this scheme.

Rui Guo; Hong Guo

2007-01-05T23:59:59.000Z

118

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

119

Teleportation of a controllable orbital angular momentum generator  

Science Journals Connector (OSTI)

We report on a teleportation scheme, in which a controllable orbital angular momentum (OAM) generator is teleported. Via our scheme, Alice is able toaccording to another independent photons spin state (polarization) sent by Carolelectrically control the remote OAM generation on Bobs photon. To this end, we introduce a local electrically tunable and spin-dependent OAM generator to transfer a preliminary OAM-OAM entanglement to a spin-OAM hybrid entanglement, which then makes a joint Bell-state measurement on Alice and Carols photons play its role. We show that the quantum state tomography can be introduced to evaluate the performance of the teleportation.

Lixiang Chen and Weilong She

2009-12-14T23:59:59.000Z

120

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

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

Local 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 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 re...

Turitsyn, Konstantin S; Backhaus, Scott; Chertkov, Misha

2010-01-01T23:59:59.000Z

122

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

SciTech Connect

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

123

The integration of Automatic Speech Recognition into the Air Traffic Control system  

E-Print Network (OSTI)

Today, the Air Traffic Control (ATC) system relies primarily on verbal communication between the air traffic controllers and the pilots of the aircraft in the controlled airspace. Although a computer system exists that ...

Karlsson Joakim

1990-01-01T23:59:59.000Z

124

E-Print Network 3.0 - automatic power control Sample Search Results  

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

Power Transmission, Distribution and Plants ; Engineering 7 Modeling of wind farm controllers Poul Srensen1 Summary: as the overall control on the wind farm level....

125

Modeling, control and electromagnetic transient simulation of the doubly fed induction generator-based wind energy generation system  

Science Journals Connector (OSTI)

This paper presents the dynamic modeling and the stator-voltage-aligned control (SVAC) strategies of the doubly fed induction generator (DFIG)-based wind energy generation system (WEGS). The state-space dynamic model of the DFIG is derived in the synchronous ... Keywords: EMTP-ATP, double-fed induction generators, engineering education, internal model control, maximum power-point tracking algorithm, stator-voltage-aligned control, wind power generation

Yang Han, Pan Shen

2014-03-01T23:59:59.000Z

126

Evolution of double-dwell serial search acquisition with automatic threshold control  

E-Print Network (OSTI)

of duration rr to be tested until acquisition. This term can be obtained directly from the generating function by evaluating appropriate partial derivatives as follows, dG(Zr, Zs) )1& = t~ Ixl=Z2=1, o'er (3A0) 26 dG(Z?Z2) P2 = dZ' Izr=z2=2 2 (3. 41... . . 35 26 27 28 Baseband Filters Frequency Response Limits Frequency Response Simulation . Gold Code Sequence Generator Configuration 38 FIGURE Page 29 Illustration of Gold Code Generation with [10, 9, 8, 6, 5, 1j and [10, 5, 3, 2] Generators 42...

Jung, Sung-Hyun

2012-06-07T23:59:59.000Z

127

Using CP in Automatic Test Generation for ABB Robotics Paint Control System  

Science Journals Connector (OSTI)

Designing industrial robot systems for welding, painting, and assembly, is challenging because they ... specialized in building highly reliable and safe robotized paint systems based on an integrated process cont...

Morten Mossige; Arnaud Gotlieb; Hein Meling

2014-01-01T23:59:59.000Z

128

Fuzzy logic control strategy of wind generator based on the dual-stator induction generator  

Science Journals Connector (OSTI)

Abstract The work presented in this paper is the evaluation of the variable speed wind turbine based on dual star induction generator (DSIG) connected for power optimization in the conversion chain connected to the electrical grid. This optimization is concretized by two methods, namely, the Maximum Power Point Tracking MPPT algorithm in the case where the characteristic of the turbine is known and the nonlinear method based on the theory of fuzzy logic controlled torque which is most appropriate when there is a lack of information on the characteristic ( C p ( ? ) ) of the turbine. However, the limitation of power is performed by action on the generator control only. Simulation results are presented and discussed.

Samira Chekkal; Narimen Aouzellag Lahaani; Djamal Aouzellag; Kaci Ghedamsi

2014-01-01T23:59:59.000Z

129

An overview on doubly fed induction generators? controls and contributions to wind based electricity generation  

Science Journals Connector (OSTI)

Abstract Undoubtedly, energy has a significant role in economic growth and technical developments. Renewable energy resources are becoming more important in recent years due to their tremendous contributions to the independence of power generation industry from traditional fossil energy resources. Wind energy has been outstanding among renewable energy resources since continuous harvestable potential on the earth is approximately around 106MW. Concerning the variable nature of wind energy, the variable speed machines, especially doubly fed induction generators (DFIG) are one of the considerations for wind energy conversion systems (WECS). Their implementation in renewable energy conversion systems is dramatically increasing due to their numerous advantages such as low cost and small size, the elimination of external DC source, the ability to produce maximum power under various wind and rotational speeds, the capability of controlling active and reactive power, and the opportunity to employ cheaper and smaller convertors and controllers. This paper is an extensive review of researches in the past 30 years on DFIG. The study starts with describing general perspective on wind energy and commonly used generators in wind conversion. Then it presents more details on \\{DFIGs\\} operational modes, utilizations, their modeling and simulation. It is followed by DFIG control methods and overviews of different employed electrical and mechanical controlling methods. Finally the review on the mutual impact of DFIG on power networks and vice versa, including wind uncertainty, power and frequency stability, power and voltage quality, operation under steady state, dynamic and fault conditions, and protections is given. Based on the review DFIG has advantages in terms of electrical, mechanical, and economic perspectives. It can be concluded that the DFIG has the most promising future for \\{WECSs\\} in power generation to complement the conventional systems.

Abdullah Asuhaimi B. Mohd Zin; Mahmoud Pesaran H.A.; Azhar B. Khairuddin; Leila Jahanshaloo; Omid Shariati

2013-01-01T23:59:59.000Z

130

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

Science Journals Connector (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

131

Phase Space Navigator: Towards Automating Control Synthesis in Phase Spaces for Nonlinear Control Systems  

E-Print Network (OSTI)

We develop a novel autonomous control synthesis strategy called Phase Space Navigator for the automatic synthesis of nonlinear control systems. The Phase Space Navigator generates global control laws by synthesizing ...

Zhao, Feng

1991-04-01T23:59:59.000Z

132

E-Print Network 3.0 - automatic temperature control Sample Search...  

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

zu Lbeck Collection: Computer Technologies and Information Sciences 64 CONTROL STRATEGIES FOR MANAGING ENERGY IN A BUILDING Julien Eynard, Benjamin Paris, Stphane Grieu,...

133

Application of fuzzy logic control algorithm as stator power controller of a grid-connected doubly-fed induction generator  

Science Journals Connector (OSTI)

This paper discusses the power outputs control of a grid-connected doubly-fed induction generator (DFIG) for a wind power generation systems. The DFIG structure control has a six diode rectifier ... order to cont...

Ridha Cheikh; Arezki Menacer; Said Drid; Mourad Tiar

2013-03-01T23:59:59.000Z

134

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 55, NO. 6, JUNE 2010 1477 Proportional-Integral Controllers for Minimum-Phase  

E-Print Network (OSTI)

-in-control systems include the continuous stirred tank reactor [7], switched reluctance motors [8], and some aircraft

How, Jonathan P.

135

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 52, NO. 5, MAY 2007 863 Technical Notes and Correspondence  

E-Print Network (OSTI)

Terms--Algebraic graph theory, cooperative control, multiagent systems, nonsmooth systems. I synchronization and regulation of relative distances within a group of agents, and derive decentralized to cooperative control de- sign and analysis. Under the assumption of connected (but arbitrarily switching

Guo, Yi

136

Multiple models decentralized coordinated control of doubly fed induction generator  

Science Journals Connector (OSTI)

Abstract In this paper, a multiple model optimal tracking control (MOTC) design method for the double fed induction generator (DFIG) using correlative measured technique is proposed. The DFIG is represented by a third-order model, where electro-magnetic transients of stator are neglected. By using the correlative measured technique, the correlative measured matrix (CMM) of wind power system is obtained firstly. Then, a nonstandard state space equation of DFIG is obtained with the correlative measured vectors (CMVs), which reflect interactions between the \\{DFIGs\\} and grid. In order to cope with nonlinearities and continuous variation in the operating points, a multiple model design method is proposed in the discrete domain. The obtained control law, synthesized by using Bayesian probability, only depends on the local measured parameters. Hence, the MOTC can be regarded as a decentralized coordinated control, which can simplify the control structure and improve the transient stability of DFIG. To illustrate the effectiveness of the proposed MOTC strategy, simulations on a hybrid wind thermal power (HWTP) system are performed. The results show that the proposed MOTC strategy can provide acceptable performance throughout the whole operating region. Comparing to the conventional PID control, transient stability, damping, and fault ride-through capability of DFIG with the proposed MOTC design method have been improved effectively.

Yu-guang Niu; Xiao-ming Li; Zhong-wei Lin; Ming-yang Li

2015-01-01T23:59:59.000Z

137

918 IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 54, NO. 4, APRIL 2009 PI-Funnel Control for Two Mass Systems  

E-Print Network (OSTI)

disturbances are rejected. Finally, the controllers are implemented on a real plant, an electrical drive. Index Terms--Adaptive control, electric drives, tracking, two mass sys- tems. I. INTRODUCTION We control. Schuster is with the Institute of Electrical Drive Systems, Technical Uni- versity Munich, Munich 80333

Knobloch,Jürgen

138

An Integrated Scheme for Anomaly Identification and Automatic Control of Nuclear Power Plants Xin Jin, Robert M. Edwards and Asok Ray  

E-Print Network (OSTI)

An Integrated Scheme for Anomaly Identification and Automatic Control of Nuclear Power Plants Xin.edu INTRODUCTION Nuclear Power Plants (NPPs) are complex systems with many variables that require adjustment to the NPP. METHODOLOGY This proposed integrated scheme consists of three inter-related subsystems: Nuclear

Ray, Asok

139

A Neural Network Generating Force Command for Motor Control of a Robotic Arm  

E-Print Network (OSTI)

A Neural Network Generating Force Command for Motor Control of a Robotic Arm Antoine de Rengerv is generated and controlled still represents unanswered questions [7]. In [3], an arm controller that learns attractors in the motor space that are used to generate a speed command to control the arm

Paris-Sud XI, Université de

140

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.

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

2244 IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 56, NO. 10, OCTOBER 2011 Guest Editorial  

E-Print Network (OSTI)

of applications, such as, environmental control, event detection and suppression, home automation, manufacturing and forms, have greatly facilitated and enhanced the automated, remote, and intelligent monitoring penetrated a plethora of application domains from industrial and building automation, to environmental

Johansson, Karl Henrik

142

Decoupled Control of Doubly Fed Induction Generator by Vector Control for Wind Energy Conversion System  

Science Journals Connector (OSTI)

Abstract Since the penetration of wind power generation in growing, system operators have an increasing interest in analyzing the impact of wind power on the connected power system. The doubly fed induction generator (DFIG) is generally used in the production of the electric energy and more specifically in wind turbines. Currently, to regulate the active and reactive power exchanged between the machine and the grid. A detail dynamic model of a DFIG-based wind-turbine grid-connected system is presented in the d,q -synchronous reference frame by controlling the machine inverter with the algorithm of control based on vector control concept (with stator flux orientation). The aim of control is to have measured active and reactive powers equal to the reference values. These powers must then be collected. In order to measure only the rotor currents, we can use an indirect control method, with integrating power regulation loop, using a classical PI controller: proportionalintegral. In this way, this control is able to limit the machine rotor currents. In another way, an appropriate fitness function is derived to express the time domain evolution of DFIG, with the objective to assure the DFIG continuous operation even under a fault condition and improve at the same time its transient behavior as compared with the indirect control without power loop. The control of our machine is simulated; finally the Simulations results are presented and discussed.

K. Kerrouche; A. Mezouar; Kh. Belgacem

2013-01-01T23:59:59.000Z

143

Multi - Timescale Control of Energy Storage Enabling the Integration of Variable Generation.  

E-Print Network (OSTI)

??A two-level optimal coordination control approach for energy storage and conventional generation consisting of advanced frequency control and stochastic optimal dispatch is proposed to deal (more)

Zhu, Dinghuan

2014-01-01T23:59:59.000Z

144

Nonlinear DSTATCOM controller design for distribution network with distributed generation to enhance voltage stability  

E-Print Network (OSTI)

Nonlinear DSTATCOM controller design for distribution network with distributed generation Accepted 19 June 2013 Keywords: Distributed generation Distribution network DSATACOM Partial feedback connected to a distribution network with distributed generation (DG) to regulate the line voltage

Pota, Himanshu Roy

145

Computer controlled MHD power consolidation and pulse generation system  

SciTech Connect

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

146

Automatic control of air to fuel ratio in a fluidized bed gasifier  

E-Print Network (OSTI)

for our gasification system, which was also my personal interest. My grateful aPPreciation is extended to Dr. B. A. Stout of the Agricultural Engineering Department and Dr. R. M. Alexander of the Mechanical Engineering Department, serving... of the gasif'er 46 46 46 47 47 47 48 48 52 58 58 VI CONCLUSIONS AND RECOMMENDATIONS 64 Conclusions Recommendations 64 65 REFER"NCES 68 APPENDIX A LIST OF INSTRUMENTS B SUBROUTINES FOR CAMAC APPLICATION C CONTROL PROGRAM D PSYCHROMETRIC...

Ling, Peter P.

2012-06-07T23:59:59.000Z

147

A Game Strategy for Power Flow Control of Distributed Generators in Smart Grids  

Science Journals Connector (OSTI)

We consider the distributed power control problem of distributed generators(DGs) in smart grid. In order...

Jianliang Zhang; Donglian Qi; Guoyue Zhang

2014-01-01T23:59:59.000Z

148

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

SciTech Connect

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

149

Biofouling control with ozone at the Bergen Generating Station  

SciTech Connect

The results of a study designed to evaluate the effectiveness of ozone as an alternative to chlorine for condenser biofouling control in a once-through cooling system are reported. Tests were conducted at PSE and G's Bergen Generating Station using a pilot-scale condenser system to simulate plant condenser operations. Three model condensers were operated under identical conditions with only the biocide treatment differing. Comparisons of ozone and chlorine were made and the minimum effective levels of each were determined by daily measurements of the heat transfer coefficient across the model condenser tubes and/or the water side pressure drop. Final evaluation was based on the mass of biofouling material collected from the tubewalls. Test results indicate that chlorine is capable of effective biofouling control when applied for 2 hours/day at a level as low as 0.1 mg/l. Ozone, applied on the same schedule, requires 0.5 mg/l for effective control. The results of this study are representative of only the Bergen site. Water quality at each particular site will influence the development of the biofouling organisms, the chemical reactions of the biocides, and therefore, the effectiveness of the treatment methodology. The results suggest that further examination of ozonation for biofouling control is warranted. Although much more costly than chlorine, its effects on indigenous ecosystems may prove ozone to be better suited for application at selected power plants. It must be emphasized, however, that much more information is necessary before ozone can be recommended as an environmentally acceptable alternative to chlorine.

Sugam, R.; Guerra, C.R.; DelMonaco, J.L.; Singletary, J.H.; Sandvik, W.A.

1980-11-01T23:59:59.000Z

150

470 IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 46, NO. 3, MARCH 2001 Robust and Adaptive Boundary Control of a  

E-Print Network (OSTI)

manufacturing and process automation. Robust and adaptive control is designed to damp out trans- verse of Electrical Engineering and Computer Sci- ence, University of Central Florida, Orlando, FL 32816 USA (e continuous time flexible systems. For example, strings have been used for modeling telephone wires, cables

Qu, Zhihua

151

Cryptanalytic Attack on Cryptographic Sequence Generators: The Class of Clock-Controlled Shrinking Generators  

Science Journals Connector (OSTI)

The shrinking generator is a very popular sequence generator with cryptographic applications. Nowadays, it is still considered as a secure keystream generator. In this work, it is shown...A 2(S???2)?

A. Fster-Sabater; P. Caballero-Gil

2008-01-01T23:59:59.000Z

152

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

E-Print Network (OSTI)

Decentralized Control to Augment LVRT Capability of Wind Generators with STATCOM/ESS M. J. Hossain). In this paper it is shown that STATCOM with energy storage system (STATCOM/ESS), controlled via robust control

Pota, Himanshu Roy

153

Robust control based on the Lyapunov theory of a grid-connected doubly fed induction generator  

Science Journals Connector (OSTI)

This paper discusses the robust control of a grid-connected doubly-fed induction generator (DFIG) controlled by vector control using a nonlinear ... , in which an optimal operation of the DFIG in subsynchronous o...

Ridha Cheikh; Arezki Menacer; Said Drid

2013-06-01T23:59:59.000Z

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

Automatic Generation of Goal-Tree from Statecharts Requirements Specification Junbeom Yoo*, Sungdeok Cha*, and Han Seong Son**  

E-Print Network (OSTI)

*, Sungdeok Cha*, and Han Seong Son** *Korea Advanced Institute of Science Technology 373-1 Kuseong and complexity of the software being used increases. Recently the fault tree analysis is applied to the software in the area of safety critical systems such as aerospace or satellite process controller. It is a finite state

156

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 52, NO. 8, AUGUST 2007 1495 Theorem 5: W.p.1, the IPA derivatives of the lost-sales time average  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 52, NO. 8, AUGUST 2007 1495 Theorem 5: W.p.1, the IPA, the sided IPA derivatives satisfy d d+ L(T;) st d d0L(T;); T > 0; 2 2: (4.8) Stochastic equality holds.7) and the definition of V + m ()and V 0n () by standard arguments. Theorem 6: Under Assumptions 1 and 4, the IPA

Lin, Feng

157

Intelligent Control of Energy-Saving Power Generation System  

Science Journals Connector (OSTI)

Highway power generation system which is environmentally friendly and sustainable provides an innovative method of energy conversion. It is also as a kind ... solar electric generation system integration. Develop...

Zhiyuan Zhang; Guoqing Zhang; Zhizhong Guo

2013-01-01T23:59:59.000Z

158

Real-Time Deferrable Load Control: Handling the Uncertainties of Renewable Generation  

E-Print Network (OSTI)

Real-Time Deferrable Load Control: Handling the Uncertainties of Renewable Generation Lingwen Gan for handling the un- certainties of renewable generation. Traditionally, demand response has been focused in renewable generation. In this paper, we propose a real-time distributed deferrable load control algorithm

Low, Steven H.

159

Neural Control of the Self-Excited Induction Generator for Variable-Speed Wind Turbine Generation  

Science Journals Connector (OSTI)

In this paper, a steady state and transient analysis of a stand alone Self Excited Induction Generator (SEIG) is presented. The conventional dynamic ... Artificial Neural Network (ANN) to model the induction generator

S. Zouggar; Y. Zidani; M. L. ELhafyani

2012-01-01T23:59:59.000Z

160

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

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

A PIC-Controller Based Doubly Fed Induction Generator (DFIG) for Wind Energy Conversion Systems  

Science Journals Connector (OSTI)

The design details of a PIC-controller based Doubly Fed Induction Generator (DFIG) for wind power generation is described. The proposed PIC-DFIG not only provides a low cost Solution...

K. Sureshkumar; P. Vijaya kumar

2011-01-01T23:59:59.000Z

162

Backstepping control of DFIG generators for wide-range variable-speed wind turbines  

Science Journals Connector (OSTI)

In this paper, we have presented a general study of self excited induction generator used in isolated renewable energy conversion source. Tthe behaviour of generated voltage under variable load, rotor speed and excitation capacitance is presented. Also, we have proposed a robust controller suitable in order to control the terminal DC voltage under different speed and AC load conditions for supplied an isolated DC load. The experimental characteristic curve of the generator and simulation result of proposed control scheme are presented.

Badre Bossoufi; Mohammed Karim; Ahmed Lagrioui; Mohammed Taoussi; Mohamed Larbi ElHafyani

2014-01-01T23:59:59.000Z

163

Demonstrating Fuel Consumption and Emissions Reductions with Next Generation Model-Based Diesel Engine Control  

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

Presents a next generation model-based engine controller that incorporates real-time fuel efficiency optimization and tested under fully transient engine and vehicle operating conditions.

164

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

165

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

Science Journals Connector (OSTI)

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

Iulia Coroama; Mihai Gavrilas; Ovidiu Ivanov

2010-10-01T23:59:59.000Z

166

Control Oriented Modeling and System Identification of a Diesel Generator Set (Genset)  

E-Print Network (OSTI)

Cheong, Perry Y. Li and Jicheng Xia Abstract-- A diesel generator set (genset) refers to a diesel engineControl Oriented Modeling and System Identification of a Diesel Generator Set (Genset) Kai Loon dependence on the field current; the engine speed governor is found to be a first order controller

Li, Perry Y.

167

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...

Mena, Hugo Eduardo

2009-05-15T23:59:59.000Z

168

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...

Mena Lopez, Hugo Eduardo

2008-10-10T23:59:59.000Z

169

Application of novel adaptive control of STATCOM in wind power generation  

Science Journals Connector (OSTI)

During the last years the amount of installed wind power has continued increased. The impact of wind generation on the electrical system should be assessed to figure out potential hazards to system operation and decreasing of quality, stability and reliability ... Keywords: FACT device, STATCOM, SVC, adaptive control, induction generator, wind generation

Nikolay Djagarov; Zhivko Grozdev; Milen Bonev; Stefan Filchev

2010-07-01T23:59:59.000Z

170

Advanced control for power density maximization of the brushless DC generator  

E-Print Network (OSTI)

-to line EMF............................... 129 96 Original phase EMF and current reference waveform................................... 130 97 Original phase EMF, current reference waveform, and controlled current... 130 98 Impact of the current... ................. 6 A. Mechanical structure of the BLDC generator .............................. 7 B. Permanent magnets of the BLDC generator................................. 10 C. Induced EMF of the BLDC generator...

Lee, Hyung-Woo

2005-02-17T23:59:59.000Z

171

Voltage Control of Distribution Networks with Distributed Generation using Reactive Power  

E-Print Network (OSTI)

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

Pota, Himanshu Roy

172

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

173

Direct control of doubly fed induction generator fed by PWM converter with a variable structure control based on a sliding mode control  

Science Journals Connector (OSTI)

This paper presents a direct control of doubly fed induction generator (DFIG) with a variable structure control based on ... and reactive power performance when it applies to DFIG. Simulation results and improvem...

Youcef Bekakra; Djilani Ben Attous

2014-09-01T23:59:59.000Z

174

Robot Locomotion Controller Generation Through Human-Inspired Optimization  

E-Print Network (OSTI)

This thesis presents an approach to the formal design, optimization and implementation of bipedal robotic walking controllers, with experimental application on two biped platforms. Standard rigid-body modeling is used to construct a hybrid sys- tem...

Powell, Matthew Joseph

2013-11-13T23:59:59.000Z

175

Controller for a small induction-generator based wind-turbine  

Science Journals Connector (OSTI)

Design of a low-cost micro-controller for a small induction-generator based grid-connected wind-turbine is presented in this paper. The controller senses the parameters of the wind-turbine generator and the grid, and makes decisions about grid connection and disconnection. Low-cost instrumentation circuitry has been developed to measure the generator and grid parameters. Based on the measurement of voltage and frequency of the wind-turbine generator and the grid side, a control decision is taken to connect the system to the grid. The controller makes decision to disconnect the system from the grid based on the power flow measurement between the wind turbine and the grid. The power flow between wind turbine and the grid depends upon the availability of the wind. The prototype controller has been developed based on a micro-controller PIC16F877 and has been tested in the laboratory.

R. Ahshan; M.T. Iqbal; George K.I. Mann

2008-01-01T23:59:59.000Z

176

E-Print Network 3.0 - automatic exploitation system Sample Search...  

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

Switzerland Collection: Computer Technologies and Information Sciences 8 Automatic Patch-Based Exploit Generation is Possible: Techniques and Implications Summary: Automatic...

177

New Approach to Control of Vibrations Generated by Construction in Rock and Soil  

E-Print Network (OSTI)

to a radically new approach to vibration control: Autonomous Crack Measurement (ACM). This paper describes ACM produced by vibrations. Direct measurement of that which concerns the public ­ cracks ­ provides a controlNew Approach to Control of Vibrations Generated by Construction in Rock and Soil Nuevo Enfoque Al

178

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

E-Print Network (OSTI)

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

Kimball, Jonathan W.

179

Semi-autonomous Trajectory Generation for Mobile Robots with Integral Haptic Shared Control  

E-Print Network (OSTI)

Semi-autonomous Trajectory Generation for Mobile Robots with Integral Haptic Shared Control Carlo for semi-autonomous path plan- ning for mobile robots that extends the classical paradigm of bilateral shape by controlling the motion of a finite number of control points. An autonomous algorithm corrects

Paris-Sud XI, Université de

180

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

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

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. 5 figs.

Barrett, D.M.

1996-11-05T23:59:59.000Z

182

Tri-Met's Experience With Automatic Passenger Counter and Automatic Vehicle Location Systems  

E-Print Network (OSTI)

Tri-Met's Experience With Automatic Passenger Counter and Automatic Vehicle Location Systems James includes Automatic Vehicle Location (AVL) using a satellite-based global positioning system (GPS); · Voice for temporary data storage, a vehicle control head displaying schedule adherence to operators, detection

Bertini, Robert L.

183

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

SciTech Connect

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

184

Control of wind generator associated to a flywheel energy storage system  

Science Journals Connector (OSTI)

In this paper, a doubly fed variable speed wind induction generator connected to the grid associated to a flywheel energy storage system (FESS) is investigated. The dynamic behaviour of a wind generator, including the models of the wind turbine (aerodynamic), the doubly fed induction generator (DFIG), a ac/ac direct converter, the converter control (algorithm of VENTURINI) and the power control of this system, is studied. Also investigated is a control method of the FESS system, which consists of the classical squirrel-cage induction machine supplied off the variable speed wind generator (VSWG) through a rectifierinverter cascade arrangement. Simulation results obtained on the basis of the dynamic models of the wind generator are presented, for different operating points, to demonstrate the performance of the proposed system.

K. Ghedamsi; D. Aouzellag; E.M. Berkouk

2008-01-01T23:59:59.000Z

185

1962 IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 58, NO. 8, AUGUST 2013 Design of State-Based Schedulers for  

E-Print Network (OSTI)

-Based Schedulers for a Network of Control Loops Chithrupa Ramesh, Student Member, IEEE, Henrik Sandberg, Member past controls from the scheduling criterion, we find that certainty equivalence holds. This condition-based scheduler with a certainty equivalent controller. However, this controller is not an equivalent design

Johansson, Karl Henrik

186

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

187

A new-generation energy-saving industrial controlled electric drive  

Science Journals Connector (OSTI)

Results of the innovative development of an efficiently controlled, new-generation, energy-saving, industrial AC electric drive are presented. ... filter in the intermediate link. The improved energy and electrom...

R. T. Shreiner; V. K. Krivovyaz; A. I. Kalygin

2007-11-01T23:59:59.000Z

188

Electrical power systems (Panama). Energy generation and control equipment, July 1991. Export trade information  

SciTech Connect

Concerning energy generation equipment, the Panamanian market is supplied entirely by imports, mainly from the United States, the United Kingdom, Japan and Korea. The market is heavily dependent on government purchases, mainly generators and transformers. Imports showed a promising growth of 17% during 1990. Most energy generation and control equipment products are imported as local manufacturing is non existent, with the exception of copper cables.

Not Available

1991-07-01T23:59:59.000Z

189

Real-Time Deferrable Load Control: Handling the Uncertainties of Renewable Generation  

E-Print Network (OSTI)

Real-Time Deferrable Load Control: Handling the Uncertainties of Renewable Generation Lingwen Gan is an essential tool for handling the uncertainties associated with the increasing penetration of renewable aggregate) to compensate for the random fluctuations in renewable generation. In this paper, we propose

Low, Steven H.

190

Capacitor Voltage Control in a Cascaded Multilevel Inverter as a Static Var Generator  

E-Print Network (OSTI)

1 Capacitor Voltage Control in a Cascaded Multilevel Inverter as a Static Var Generator M. Li, J. N for a cascaded multilevel inverter to be used for static var compensation. Index Terms-- Multilevel Inverter, Static Var Generator (SVG), Cascade inverter. I. INTRODUCTION Multilevel inverters have gained much

Tolbert, Leon M.

191

A Predictive power control of Doubly Fed Induction Generator for Wave Energy Converter  

E-Print Network (OSTI)

using a linearized state- space model. The DFIG-based WEC power tracking performances further converter (WEC), irregular wave, doubly-fed induction generator (DFIG), predictive power control, I rotational motion for connection to a conventional rotating electrical generator as a DFIG (Fig. 1). Fig.1

Brest, Université de

192

Autonomous Control of Inverter-Interfaced Distributed Generation Units for Harmonic Current Filtering and  

E-Print Network (OSTI)

Autonomous Control of Inverter-Interfaced Distributed Generation Units for Harmonic Current-interfaced Distributed Generation (DG) units, which can autonomously share harmonic currents and resonance damping, such that harmonic resonances and voltage distortions can be damped. To autonomously share harmonic currents, a droop

Chen, Zhe

193

Stabilisation of grid connected wind farms using doubly-fed induction generators with FACTS controllers  

Science Journals Connector (OSTI)

The impact of the wind generation on the power systems is no longer negligible if high penetration levels are going to be achieved. It is very important to boost the transfer capability of the transmission system while improving the utilisation of transmission assets to accommodate high penetration of wind power on the network. Hence, more sophisticated control schemes using advanced power electronic-based flexible AC transmission system (FACTS) controllers are required which will enhance voltage security and voltage stability control. This paper presents the impact of FACTS controllers on the dynamic stability of power systems connected with wind energy conversion systems. The wind farm model considered is a variable speed doubly-fed induction generator model. The dynamic simulation results yield information on: 1) the impact of faults and wind speed changes on the performance of DFIG-based induction generators; 2) the change in controllable parameters of the FACTS controllers following the faults and wind speed changes; 3) transient rating of the FACTS controllers for enhancement of rotor speed stability of induction generators and angle stability of synchronous generators.

N. Senthil Kumar

2013-01-01T23:59:59.000Z

194

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 43, NO. 12, DECEMBER 1998 1745 "hysteresis," caused by the subcritical bifurcation. The bifurcation  

E-Print Network (OSTI)

by the subcritical bifurcation. The bifurcation diagrams for the backstepping controller (57) are shown in Fig. 4 for c0 = 6 and #12;2 k = 0:5. This controller "softens" the bifurcation from subcritical

Amir, Yair

195

Control based on fuzzy logic of a flywheel energy storage system associated with wind and diesel generators  

Science Journals Connector (OSTI)

The aim of this paper is to propose a control strategy of a flywheel energy storage system associated with a diesel generator and a fixed speed wind generator. To control the power exchanged between the flywheel energy storage system and the ac grid, ... Keywords: diesel generator, flywheel energy storage system, fuzzy logic based supervisor, wind generator

Ludovic Leclercq; Benoit Robyns; Jean-Michel Grave

2003-11-01T23:59:59.000Z

196

Adaptive fuzzy-based motion generation and control of mobile under-actuated manipulators  

Science Journals Connector (OSTI)

In this paper, adaptive fuzzy-based motion generation and control are investigated for nonholonomic mobile manipulators with an under-actuated dyanmics model, in the presence of parametric and functional uncertainties. It is well known that the constraints ... Keywords: LQR, Mobile under-actuated manipulators, Model reference control, Optimization, Sliding mode

Zhijun Li, Chenguang Yang, Chun-Yi Su, Wenjun Ye

2014-04-01T23:59:59.000Z

197

Control Speculation for Energy-Efficient Next-Generation Superscalar Processors  

E-Print Network (OSTI)

, and electro-migration diffusion [21]. To keep temperature under control, high performance processors requireControl Speculation for Energy-Efficient Next-Generation Superscalar Processors Juan L. Arago, or disabling the selection logic) depending on the branch prediction confidence level. Results show

Aragón Alcaraz, Juan Luis

198

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

199

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

Boyer, Edmond

200

On designing a control system for a new generation of accelerators  

SciTech Connect

A well-conceived plan of attack is essential to the task of designing a control system for a large accelerator. Several aspects of such a plan have been investigated during recent work at LAMPF on design strategies for an Advanced Hadron Facility control system. Aspects discussed in this paper include: identification of requirements, creation and enforcement of standards, interaction with users, consideration of commercial controls products, integration with existing control systems, planning for continual change, and establishment of design reviews. We emphasize the need for the controls group to acquire and integrate accelerator design information from the start of the design process. We suggest that a controls design for a new generation of accelerators be done with a new generation of software tools. 12 refs.

Schaller, S.C.; Schultz, D.E.

1987-01-01T23:59:59.000Z

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.


201

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

SciTech Connect

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 Pengbo; Li Fuli [MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Department of Applied Physics, Xi'an Jiaotong University, Xi'an 710049 (China)

2010-03-15T23:59:59.000Z

202

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

203

Clothes Dryer Automatic Termination Evaluation  

SciTech Connect

Volume 2: Improved Sensor and Control Designs Many residential clothes dryers on the market today provide automatic cycles that are intended to stop when the clothes are dry, as determined by the final remaining moisture content (RMC). However, testing of automatic termination cycles has shown that many dryers are susceptible to over-drying of loads, leading to excess energy consumption. In particular, tests performed using the DOE Test Procedure in Appendix D2 of 10 CFR 430 subpart B have shown that as much as 62% of the energy used in a cycle may be from over-drying. Volume 1 of this report shows an average of 20% excess energy from over-drying when running automatic cycles with various load compositions and dryer settings. Consequently, improving automatic termination sensors and algorithms has the potential for substantial energy savings in the U.S.

TeGrotenhuis, Ward E.

2014-10-01T23:59:59.000Z

204

Flicker mitigation by reactive power control in wind farm with doubly fed induction generators  

Science Journals Connector (OSTI)

Abstract This paper presents a novel wind farm control with the purpose to mitigate the flicker emission of doubly fed induction generators. The presented control strategy is implemented in a wind farm connected to a distribution grid with consumers. The control system is composed by two controllers in cascade, the wind farm control and the local wind turbine controller. The wind farm control adapts itself to the consumptions of the distribution network and generates the minimal reactive power which allows smoothing the fast variations of wind power output. In this sense, the wind farm control facilitates the integration of wind farm into weak power grids by exchanging reactive power with network. Moreover, the wind farm controller has to be stable, fast and robust and the wind farm dispatch function has to guarantees that the local wind turbine controller can exchange the reactive power set point with network. This controller has been developed with the simulation tool DigSilent PowerFactory v14.1.

Francesc Girbau-Llistuella; Andreas Sumper; Francisco Daz-Gonzlez; Samuel Galceran-Arellano

2014-01-01T23:59:59.000Z

205

Induction generator voltage improvement using a new control strategy for turbo-expander driving systems  

Science Journals Connector (OSTI)

Abstract Turbo-expanders are relatively new sources of dispersed generation which are used to drive the electrical generators. The conventional pressure regulating valves are replaced by these devices in the gas pressure reduction station. Connecting the dispersed generation to the distribution networks especially for squirrel cage induction generators, may result in some power quality problems. These problems can be obviated using special devices in electrical networks or modifying the control system of the prime mover system in mechanical parts. In this paper, it is focused on the Point of Common Coupling (PCC) voltage where a turbo-expander driven induction generator is connected. A new control strategy based on fuzzy controlled PID is considered for the mechanical part of the turbo-expander nozzle system. The results show a better control of turbo-expander output power in a linear form over the full range of operating points. The other purpose of the control system modification is to improve the power quality and stabilize the PCC voltage in different operating point conditions.

Mehdi Taleshian Jelodar; Hasan Rastegar; Mohammad Pichan

2015-01-01T23:59:59.000Z

206

Transient stability and control of renewable generators based on Hamiltonian surface shaping and power flow control. Part II, analysis.  

SciTech Connect

The swing equations for renewable generators connected to the grid are developed and a wind turbine is used as an example. The swing equations for the 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 generators 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. The first step is to analyze the system as a conservative natural Hamiltonian system with no externally applied non-conservative forces. The Hamiltonian surface of the swing equations is related to the Equal-Area Criterion and the PEBS method to formulate the nonlinear transient stability problem. This formulation demonstrates the effectiveness of proportional feedback control to expand the stability region. The second step is to analyze the system as natural Hamiltonian system with externally applied non-conservative forces. The time derivative of the Hamiltonian produces the work/rate (power flow) equation which is used to ensure balanced power flows from the renewable generators to the loads. The Second Law of Thermodynamics is applied to the power flow equations to determine the stability boundaries (limit cycles) of the renewable generators 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. This paper will present the analysis and numerical simulation results for two nonlinear control design examples that include: (1) the One-Machine Infinite Bus (OMIB) system with a Unified Power Flow Controller (UPFC) and (2) the swing equation for a wind turbine connected to an infinite bus through a UPFC to determine the required performance of the UPFC to enable the maximum power output of a wind turbine subject to stochastic inputs while meeting the power system constraints on frequency and phase. The energy storage requirements will also be identified from the UPFC and/or FACTS devices while working in combination with the wind turbine.

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

2010-11-01T23:59:59.000Z

207

Predictive current control of outer-rotor five-phase BLDC generators applicable for off-shore wind power plants  

Science Journals Connector (OSTI)

Abstract Model predictive control algorithms have recently gained more importance in the field of wind power generators. One of the important categories of model predictive control methods is improved deadbeat control in which the reverse model of generator is used to calculate the appropriate inputs for the next iteration of controlling process. In this paper, a new improved deadbeat algorithm is proposed to control the stator currents of an outer-rotor five-phase BLDC generator. Extended Kalman filter is used in the estimation step of proposed method, and generator equations are used to calculate the appropriate voltages for the next modulation period. Two aspects of proposed controlling method are evaluated including its sensitivity to generator parameter variations and its speed in following the reference values of required torque during transient states. Wind power generators are kept in mind, and proposed controlling method is both simulated and experimentally evaluated on an outer-rotor five-phase BLDC generator.

Jose Luis Romeral Martinez; Ramin Salehi Arashloo; Mehdi Salehifar; Juan Manuel Moreno

2014-01-01T23:59:59.000Z

208

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

209

Automatic vehicle following for emergency lane change maneuvers  

E-Print Network (OSTI)

A lane change maneuver is one of the many appropriate responses to an emergency situation. This thesis proposes to design a combined controller for automatic vehicles for an emergency lane change (ELC) maneuver on an Automatic Highway System (AHS...

Yoon, Seok Min

2012-06-07T23:59:59.000Z

210

Generation and quantum control of giant plasmon pulses by transient quantum coherence  

E-Print Network (OSTI)

Amplified ultrashort laser pulses are useful in many fields of science and engineering. Pushing the frontiers of ultrashort pulse generation will lead to new applications in biomedical imaging, communications and sensing. We propose a new, quantum approach to ultrashort pulse generation using transient quantum coherence which predicts order of magnitude stronger pulses generated with lower input energy than in the steady-state regime, reducing the practical heating limitations. This femtosecond quantum-coherent analog of nanosecond Q-switching is not limited by the pulse duration constraints of the latter, and, in principle, may be used for a variety of lasers including x-ray and plasmon nanolasers. We apply this approach to generation of giant plasmon pulses and achieve quantum control of plasmon relaxation dynamics by varying the drive pulse delay, amplitude and duration. We provide insights into the control mechanisms, and discuss future implementations and applications of this new source of ultrashort nan...

Huo, Weiguang; Scully, Marlan

2014-01-01T23:59:59.000Z

211

Current Control of the Isolated Self-Excited Induction Generator using Shunt Active Filter  

Science Journals Connector (OSTI)

The Self Excited Induction Generator (SEIG) is an isolated power source whose terminal voltage and frequency are controlled by the excitation of the capacitance or the load impedance. This paper presents a method for calculating the minimum excitation capacitance using the equivalent circuit approach for analyzing the steady state operation of SEIG. A new strategy based on an active power filter (APF) for controlling the current and power quality of the self excited induction generator (SEIG) is also presented in this paper. The shunt active power filter was implemented using a three phase PWM current controlled voltage source inverter (VSI) and connected to the wind generator and loads in order to compensate the current harmonics and reactive power. The PWM-VSI gate control signals are derived from hysteresis band current controller. The proposed active filter proved to play an important role and give good dynamic response and robust behavior upon changes in load parameters. This investigation demonstrated that power average control strategy can facilitate the improvement of the power quality. The proposed control method extracts fundamental (reference) components of the source current for the shunt active power line conditioners for nonlinear and unbalanced loads. The Power average approach additionally maintains the voltage of the capacitor (of the PWM inverter) nearly constant without any external control circuit. The shunt APF in conjunction with the proposed controller performs perfectly under different steady state and transient conditions. The simulation results with nonlinear loads and unbalanced loads have showed the effectiveness of the proposed scheme for harmonic reduction in Wind based Power Generation.

A.M. Bouzid; M. Benghanem; B. Hamane; A. Belabbes; M. Bouhamida; A. Draou

2012-01-01T23:59:59.000Z

212

Automatic CNC Part Programming for through Hole Drilling  

Science Journals Connector (OSTI)

Abstract This paper describes a novel method for automatic generation of process plans and numerical control (NC) part programs from STEP data files. Using proposed system, it is possible to achieve fully automation of recognition of through hole features, generation of process plans and NC part programs. Thus, it becomes possible to go from neutral file to finished product in a fully automated fashion. The algorithms have been implemented on mini-computer to process product data, and display recognized hole features, process plans and creates output files containing NC part programs. These NC part programs are tested through BMV45TC24 CNC Vertical Machining Centers. The results are satisfactory.

B.R. Borkar; Y.M. Puri; A.M. Kuthe; P.S. Deshpande

2014-01-01T23:59:59.000Z

213

Automatic parallelization of object oriented models executed with inline solvers  

Science Journals Connector (OSTI)

In this work we report preliminary results of automatically generating parallel code from equation-based models together at two levels: Performing inline expansion of a Runge-Kutta solver combined with fine-grained automatic parallelization of the resulting ... Keywords: automatic parallelization, modelica

Hkan Lundvall; Peter Fritzson

2007-09-01T23:59:59.000Z

214

Optimal control for variable-speed wind generation systems using General Regression Neural Network  

Science Journals Connector (OSTI)

Abstract An induction generator (IG) speed drive with the application of an optimal controller and a proposed General Regression Neural Network (GRNN) controller is introduced in this paper. Grid connected wind energy conversion system (WECS) present interesting control demands, due to the intrinsic nonlinear characteristic of wind mills and electric generators. The GRNN with adaptive ant colony optimization (AACO) torque compensation is feed-forward to increase the robustness of the wind driven induction generator system. An optimal control loop for the wind power system is designed. The optimality of the whole system is defined in relation with the trade-off between the wind energy conversion maximization and the minimization of the induction generator torque variation that is responsible for the frequency fluctuations. This is achieved by using a combined optimization criterion, resulting in a LQ tracking problem with an infinite horizon and a measurable exogenous variable (wind speed). The proposed controller is designed to drive the turbine speed to extract maximum power from the wind and adjust to the power regulation.

Chih-Ming Hong; Fu-Sheng Cheng; Chiung-Hsing Chen

2014-01-01T23:59:59.000Z

215

SUBMITTED TO IEEE TRANSACTIONS ON AUTOMATIC CONTROL AS A TECHNICAL NOTE 1 Flocking in Fixed and Switching Networks  

E-Print Network (OSTI)

Terms Multi-agent systems, cooperative control, nonsmooth systems, algebraic graph theory. I synchronization and regulation of relative distances within a group of agents, and derive de- centralized and George Pappas are with the Department of Electrical and Systems Engineering, University of Pennsylvania

Tanner, Herbert G.

216

An intelligent neuro-fuzzy logic controller for induction generator based wind generation to improve power system stability  

Science Journals Connector (OSTI)

Power systems are non-linear and they are often subjected to random disturbances. This paper deals with the application of the intelligent neuro-fuzzy technique to the design of the robust power system stabiliser for power system oscillation damping enhancement in a wind turbine based power system network. The stabilising signal is computed in real time using suitable fuzzy membership functions depending upon the state of the generator on the speed-acceleration phase plane. These input signals are first characterised by a set of linguistic variables using fuzzy set notations. The fuzzy relation matrix, which gives the relationship between stabiliser inputs and stabiliser output, allows a set of fuzzy logic operations that are performed on stabiliser inputs to obtain the desired stabiliser output. The performance of the proposed controller is analysed in a single induction machine-infinite bus power system data subjected to various dynamic and transient disturbances. The proposed intelligent neuro-fuzzy control scheme exhibits a superior damping performance in comparison to the conventional controllers. Its simple architecture reduces the computational burden, thereby making it attractive for real-time implementation.

N. Albert Singh; K.A. Muraleedharan; K. Gomathy

2009-01-01T23:59:59.000Z

217

Variable Structure Control of a Doubly Fed Induction Generator for Wind Energy Conversion Systems  

Science Journals Connector (OSTI)

Abstract This paper presents the powers control of a variable speed wind turbine (WT) device based on a doubly fed induction generator (DFIG). Indeed, to increase the efficiency of the WT system, a robust variable structure control has been applied. DFIG has been previously presented in several works with diverse control diagrams using generally conventional PI controllers. Nevertheless, this type of controllers does not sufficiently handle some of WT resource characteristics such as wind fluctuations effects. Indeed, these can reduce WT performances. Furthermore, DFIG parameter variations should be accounted for. In this context, this paper proposes a high-order sliding mode to control the WT DFIG. Simulation results show that the proposed approach presents attractive features such as chattering-free behavior, good response to speed variations and robustness against machine parameter variations compared to the conventional first order sliding mode technique and even fuzzy sliding mode one.

E. Bounadja; A. Djahbar; Z. Boudjema

2014-01-01T23:59:59.000Z

218

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

219

Development of a super high speed motor-generator and controller  

Science Journals Connector (OSTI)

To develop a super high speed motor-generator it is essential to deal with magnetic analysis dynamic analysis and experimental evaluation of the heart of the MTG (Microturbine Generator) system the motor-generator. An amorphous core is applied to a stator core for reduction of iron loss at high speed and the motor-generator is analyzed with considerations focused on magnetic losses and the statistical optimum design. The performance of the amorphous core is validated by the analysis and experiment by back-to-back tests considering the AC load. Rotor dynamics is performed for dynamic stability at high speed using transient analysis orbit diagrams and compared with the experimental results. The simulation results of the generator are compared with the experiment. Also a super high speed controller of the MTG system is developed using a sensorless algorithm power stack gate driver digital signal processing analog circuit and radiation heat design. Based on these results a high speed motor-generator and controller are successfully developed.

Do-Kwan Hong; Min-Hyuk Ahn; Dae-Suk Joo

2014-01-01T23:59:59.000Z

220

Development of a super high speed motor-generator and controller  

SciTech Connect

To develop a super high speed motor-generator, it is essential to deal with magnetic analysis, dynamic analysis, and experimental evaluation of the heart of the MTG (Microturbine Generator) system, the motor-generator. An amorphous core is applied to a stator core for reduction of iron loss at high speed, and the motor-generator is analyzed with considerations focused on magnetic losses and the statistical optimum design. The performance of the amorphous core is validated by the analysis and experiment by back-to-back tests considering the AC load. Rotor dynamics is performed for dynamic stability at high speed using transient analysis orbit diagrams and compared with the experimental results. The simulation results of the generator are compared with the experiment. Also a super high speed controller of the MTG system is developed using a sensorless algorithm, power stack, gate driver, digital signal processing, analog circuit, and radiation heat design. Based on these results, a high speed motor-generator and controller are successfully developed.

Hong, Do-Kwan, E-mail: dkhong@keri.re.kr; Ahn, Min-Hyuk; Joo, Dae-Suk; Woo, Byung-Chul; Koo, Dae-Hyun [Korea Electrotechnology Research Institute, Changwon 641-120 (Korea, Republic of)

2014-05-07T23:59:59.000Z

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

Design of an Automatic Landing System for the Meridian UAV using Fuzzy Logic  

E-Print Network (OSTI)

antennas attached below the wings. Fuzzy logic is determined the ideal application for an automatic landing controller based on its ability to control uncertain and nonlinear systems. Using fuzzy logic, a longitudinal automatic landing controller...

Royer, David Andrew

2010-04-22T23:59:59.000Z

222

DSP-based fuzzy load controller for single phase self-excited induction generator  

Science Journals Connector (OSTI)

This paper presents the design and implementation of a fuzzy logic-based load controller to regulate the voltage and frequency of single phase self-excited induction generator (SEIG), suitable for standalone operation. The SEIG can be used to generate constant voltage and frequency if the load is maintained constant at its terminals. Moreover, under such operation, SEIG requires constant capacitance for excitation resulting in a fixed-point operation. For this purpose, a suitable control scheme is to be developed such that the load on the SEIG remains constant despite the change in the consumer load. A DSP-based fuzzy load controller has been developed based on equal time ratio control (ETRC) AC chopper controllable load which gives non-linear control with fast response and injects minimum harmonics in the system. The transient behaviour of DSP-based SEIG-fuzzy load controller system at different operating conditions such as application and removal of static (resistive and reactive) load is investigated.

D.K. Palwalia

2011-01-01T23:59:59.000Z

223

A hybrid passive/active system for control of the noise radiated by a small generator  

Science Journals Connector (OSTI)

The aim of this work was the design and implementation of a hybrid passive/active system to control the noise radiated by a small generator. The fundamental frequency of the periodic radiated noise depends on the electrical load plugged into the generator. Passive control is afforded by a rectangular enclosure with dimensions 1000710530?mm3. The wall panels of the enclosure (steel 1.5 mm thick) are lined with a 30?mm layer of sound absorbing material. Special attention is paid to technical aspects such as air refreshing and temperature inside the enclosure. The measured insertion loss is higher than 20 dB above 500 Hz. Low?frequency noise escapes the enclosure via intake and exhaust openings. Active control is applied to the exhaust noise. The reference signal is supplied by an accelerometer over the air filter case of the generator. A high?temperature loudspeaker is used as control source. The error signal is picked up by a cheap electric microphone. Since noise along the exhaust is too loud the microphone sensitivity had to be reduced by taping its diaphragm. A commercial system is used to implement active noise control. [Work supported by CICYT Project AMB97?1175?C03?01.

Maria Cuesta; Pedro Cobo

1999-01-01T23:59:59.000Z

224

Control based on fuzzy logic of a flywheel energy storage system associated with wind and diesel generators  

Science Journals Connector (OSTI)

The aim of this paper is to propose a control strategy of a flywheel energy storage system associated with a diesel generator and a fixed speed wind generator. To control the power exchanged between the flywheel energy storage system and the ac grid, a fuzzy logic based supervisor is proposed with the aim to minimize variations of the power generated by the diesel generator. The interesting performance of the proposed supervisor is shown with the help of simulations.

Ludovic Leclercq; Benoit Robyns; Jean-Michel Grave

2003-01-01T23:59:59.000Z

225

Constrained control framework for a stand-alone hybrid (Stirling engine)/supercapacitor power generation system  

Science Journals Connector (OSTI)

Abstract In this paper, a complete control architecture is proposed for the voltage conditioning stage of a hybrid power generation system composed of a Stirling engine coupled with a supercapacitor. Such a solar energy-based generation system aims at providing electricity to off-grid regions. The novelty of the proposed architecture is that it completely handles constraints on all the state variables of the electric stage while providing near to optimal performances in terms of settling time. The derivation of the control law enables a deep understanding of the main issues involved in the success of the closed-loop control. Moreover, the resulting feedback laws are real-time compatible and are given in a complete explicit form.

M. Alamir; M.A. Rahmani; D. Gualino

2014-01-01T23:59:59.000Z

226

Hedge-algebra-based voltage controller for a self-excited induction generator  

Science Journals Connector (OSTI)

Abstract This paper presents an indirect rotor-flux-oriented (IRFO) control system of the self-excited induction generator (SEIG) in which excitation is achieved by means of a current-controlled voltage source inverter (CC-VSI) and a single electrolytic capacitor. In the proposed control scheme, both the iron losses and the magnetic saturation are taken into account and calculated online. The main objective is to keep the DC voltage across the capacitor constant and equal to the reference value, regardless of changes in the rotor speed and load. The study is mainly focused on the DC voltage control and, more specifically, on selection of the appropriate DC voltage controller. Besides considering widely accepted types of controllers, i.e., the classical PI controller and the fuzzy logic (FL) controller, this paper proposes an alternative solution a new type of DC voltage controller based on hedge algebra. To our best knowledge, this is the first time that such a controller is considered for application in electrical engineering. The performance of the developed hedge algebra (HA) controller is evaluated through comparison with the optimal-tuned classical PI controller and the Sugeno-type FL controller. The simulation and experimental analysis are carried out in reasonably wide ranges of the DC voltage, load and rotor speed, including the case of a variable rotor speed. It is shown that the proposed HA controller provides superior performance in terms of tracking the reference DC voltage value as well as robustness to speed and load disturbances in the system.

Dinko Vukadinovi?; Mateo Bai?; Cat Ho Nguyen; Nhu Lan Vu; Tien Duy Nguyen

2014-01-01T23:59:59.000Z

227

Controllable generation of reactive oxygen species by femtosecond-laser irradiation  

SciTech Connect

Femtosecond lasers have been advancing Biophotonics research in the past two decades with multiphoton microscopy, microsurgery, and photodynamic therapy. Nevertheless, laser irradiation is identified to bring photodamage to cells via reactive oxygen species (ROS) generation with unclear mechanism. Meanwhile, currently in biological researches, there is no effective method to provide controllable ROS production precisely, which originally is leaked from mitochondria during respiration and plays a key role in a lot of important cellular processes and cellular signaling pathways. In this study, we show the process of how the tightly focused femtosecond-laser induces ROS generation solely in mitochondria at the very beginning and then release to cytosol if the stimulus is intense enough. At certain weak power levels, the laser pulses induce merely moderate Ca{sup 2+} release but this is necessary for the laser to generate ROS in mitochondria. Cellular original ROS are also involved with a small contribution. When the power is above a threshold, ROS are then released to cytosol, indicating photodamage overwhelming cellular repair ability. The mechanisms in those two cases are quite different. Those results clarify parts of the mechanism in laser-induced ROS generation. Hence, it is possible to further this optical scheme to provide controllable ROS generation for ROS-related biological researches including mitochondrial diseases and aging.

Yan, Wei; He, Hao, E-mail: haohe@tju.edu.cn; Wang, Yintao; Wang, Yisen; Hu, Minglie; Wang, Chingyue [Ultrafast Laser Laboratory, Key Laboratory of Optoelectronic Information Technology (Ministry of Education), College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin (China)

2014-02-24T23:59:59.000Z

228

Renewable generation and demand response integration in micro-grids: development of a new energy management and control system  

Science Journals Connector (OSTI)

The aim of this research resides in the development of an energy management and control system to control a micro-grid based on the use of renewable generation and demand resources to introduce the application of...

Carlos lvarez-Bel; Guillermo Escriv-Escriv; Manuel Alczar-Ortega

2013-11-01T23:59:59.000Z

229

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

230

Generating and controlling chains of entangled atoms by coherent control techniques  

SciTech Connect

A practical way of writing long sequences of entangled atomic qubits using coherent control with classical light sources is proposed. The method utilizes one-photon vs two-photon interference as a means of controlling the directionality of the motion of valence electrons during molecular dissociation processes. We show that, by dissociating in an optical lattice a one-dimensional array of ultracold diatomic molecules (e.g., Na{sub 2}{yields}Na+Na{sup *}), using a combination of photoabsorption of two mutually perpendicularly polarized beams at center frequency {omega} and a coherent Raman transition at frequencies {omega}{sub 1} and {omega}{sub 2}={omega}{sub 1}-{omega}, one can craft entangled states composed of arbitrary superpositions of sequences of atomic states, such as |f>|f>|b>+{center_dot}{center_dot}{center_dot}+|b>|b>|f>+{center_dot}{center_dot}{center_dot}, where |f> designates a dissociation process in which the ground-state Na atom goes in the forwarddirection and the excited-state Na{sup *} goes in the backward direction, while |b> designates the reverse process, namely, Na going in the backward direction and Na{sup *} going in the forward direction. The method, which on the basis of past work is expected to be robust against decoherence, would enable the encoding of very long sequences of entangled qubits.

Shapiro, Moshe [Department of Chemistry, University of British Columbia, Vancouver, British Columbia, V6T 1Z3 (Canada) and Department of Chemical Physics, Weizmann Institute, Rehovot 76100 (Israel)

2011-11-15T23:59:59.000Z

231

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

SciTech Connect

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

Generation and control of ultrashort-wavelength two-dimensional surface acoustic waves at nanoscale interfaces  

Science Journals Connector (OSTI)

In this work, we generate and probe the shortest wavelength surface acoustic waves to date, at 45 nm, by diffracting coherent extreme ultraviolet beams from a suboptical phononic crystal. The short acoustic wavelengths correspond to penetration depths of approximately 10 nm. We also measure the acoustic dispersion in two-dimensional nanostructured phononic crystals down to this wavelength for the first time, showing that it is strongly influenced by the ultrashort acoustic penetration depth, and that advanced finite-element analysis is required to model the dispersion. Finally, we use pulse sequences to control surface acoustic wave generation in one-dimensional nanostructured gratings, to preferentially enhance higher-order surface waves, while suppressing lower frequency waves. This allows us to reduce the generated surface acoustic wavelength by a factor of two for a defined nanostructure period.

Qing Li; Kathleen Hoogeboom-Pot; Damiano Nardi; Margaret M. Murnane; Henry C. Kapteyn; Mark E. Siemens; Erik H. Anderson; Olav Hellwig; Elizabeth Dobisz; Bruce Gurney; Ronggui Yang; Keith A. Nelson

2012-05-15T23:59:59.000Z

233

Control and Size Energy Storage for Managing Energy balance of Variable Generation Resources  

SciTech Connect

This paper presents control algorithms and sizing strategies for using energy storage to manage energy balance for variable generation resources. The control objective is to minimize the hourly generation imbalance between the actual and the scheduled generation of the wind farm. Three control algorithms are compared: tracking power imbalance, post-compensation, and pre-compensation. Measurement data from a wind farm located in South-central Washington State are used in the study. The results show that tracking power imbalance yields the best performance by keeping the hourly energy imbalances zero. However, the energy storage system (ESS) will be significantly oversized. Post-compensation reduces power rating of the ESS but the hourly imbalance may not be kept as zero when large and long-lasting energy imbalances occur. A linear regression forecasting algorithm is developed for the pre-compensation algorithm to pre-charge or pre-discharge the ESS based on predicted energy imbalances. The performance comparison shows that the pre-compensation method significantly reduces the size of the ESS while maintaining satisfactory performance.

Ke, Xinda; Lu, Ning; Jin, Chunlian

2014-10-27T23:59:59.000Z

234

Sensorless Control of Doubly-Fed Induction Generator-Based Wind urbines using a High-Order Sliding Mode Observer  

E-Print Network (OSTI)

control, observer, high- order sliding mode. Nomenclature WT = Wind Turbine; DFIG = Doubly-Fed Induction. Introduction DFIGs are widely used for variable speed generation and are among the most important generators strategy combines an MPPT using a HOSM observer and a HOSM for the DFIG control. This strategy presents

Brest, Université de

235

Modelling a feed-water control system of a steam generator in the framework of the dynamic reliability  

E-Print Network (OSTI)

Modelling a feed-water control system of a steam generator in the framework of the dynamic with the exploration of an industrial complex system behaviour and its prob- abilistic safety assessment (PSA critical systems), the feed-water control system of a steam generator of a pressurised water nuclear

Paris-Sud XI, Université de

236

Comparative study of voltage oriented and frequency coordinated control of grid connected doubly fed induction generator  

Science Journals Connector (OSTI)

In this paper a comparative study between voltage oriented control (VOC) and frequency coordinated control (FCC) of grid connected doubly fed induction generator (DFIG) is presented. The two method controls are deeply done on DFIG converter sides grid side converter (GSC) and rotor side converter (RSC). The VOC method permanently maintains the DFIG reactive power to zero values to achieve stable voltage. This control is implemented by regulating the rotor direct axis reference current in RSC using grid reactive power. On the other hand the FCC has employed the active power obtaining from the system frequency deviation to control the rotor quadrature axis reference current in the RSC. The GSC is the same in two studies and its applied vector controlled method. The comparison study between the two methods is conducted at a steady and dynamic state under constant and variable wind speeds. The simulation results are carried out by using PSCAD/EMTDC electromagnetic transient program to validate the comparison study between two methods control of DFIG. The outcomes of the simulation show that the VOC is very convenient when the DFIG operated at transient mode and variable wind speeds while the FCC is feasible and effective for steady-state mode applications. Furthermore the FCC method has an ability to reduce the active and reactive powers ripples as well as decreasing torque harmonics. Both of two methods had fewer transient recovery values of output parameters which ensure safety dynamic response of DFIG and power system. This study contributes significantly to choose the suitable control of the DFIG converters according to electrical grid operation conditions. In addition if a joint control has been applied to these two methods the wind power gained strong and flexible control of the frequency and voltage for different operating conditions.

Li Yang

2014-01-01T23:59:59.000Z

237

Sliding mode control of a dual-stator induction generator for wind energy conversion systems  

Science Journals Connector (OSTI)

This paper presents a sliding mode control (SMC) associated to the field oriented control (FOC) of a dual-stator induction generator (DSIG) based wind energy conversion systems (WECSs). The DSIG has two sets of stator three-phase windings spatially shifted by 30 electrical degrees. The study of operation of the wind turbine leads us to two essential cases: optimization of the power for wind speeds lower than the nominal speed of the turbine and limitation of the power for higher speeds. Conventional electrical grid connected WECS present interesting control demands, due to the intrinsic nonlinear characteristic of wind mills and electric generators. The SMC is a robust nonlinear algorithm which uses discontinuous control to force the system states trajectories to join some specified sliding surface, it has been widely used for its robustness to model parameter uncertainties and external disturbances, is studied. In order to verify the validity of the proposed method, a dynamic model of the proposed system has been simulated, to demonstrate its performance.

H. Amimeur; D. Aouzellag; R. Abdessemed; K. Ghedamsi

2012-01-01T23:59:59.000Z

238

Optimal Filtering, Methods AUTOMATIC CONTROL  

E-Print Network (OSTI)

SYSTEMS 7Updating Pi By use of the generalized Stoke's identity the update can be done as Ki+1 = Ki - FLiR

Gustafsson, Fredrik

239

John Lygeros Automatic Control Laboratory  

E-Print Network (OSTI)

Project (STREP), FP7-ICT-611538, start date October 1, 2013. Principal Investigator, Demand Response Department November 1996 - October 1997: Massachusetts Institute of Technology Postdoctoral Research

Lygeros, John

240

Distributed voltage control strategy for LV networks with inverter-interfaced generators  

Science Journals Connector (OSTI)

Abstract Low voltage distribution networks are characterized by an ever growing diffusion of single and three phase distributed generators whose unregulated operation may deplete the power quality levels, in particular as regard voltage profiles and unbalances. This issue is at present under discussion by several national and international standardization bodies and the general trend is to require, for the new connections of generators to medium and low voltage grids, their participation to the reactive power network management. In this paper a novel strategy proposes to control the network voltage unbalance suitably for coordinating single and three-phase inverter interfaced embedded generators, concurrently with a local volt/var regulation action as foreseen by the new grid connection requirements. Simulations conducted on case study network representing a typical Italian 4-wire LV distribution system under different load/generation conditions, demonstrate that the coordinated action of single-phase and three-phase inverters may considerably reduce the degree of unbalance thus improving the network power quality levels.

R. Caldon; M. Coppo; R. Turri

2014-01-01T23:59:59.000Z

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.


241

Control and generation of localized pulses in passively mode-locked semiconductor lasers  

E-Print Network (OSTI)

We show experimentally and theoretically that localized pulses can be generated from an electrically biased $200\\,\\mu$m multi-transverse mode Vertical-Cavity Surface-Emitting Laser. The device is passively mode-locked using optical feedback from a distant Resonant Saturable Absorber Mirror and it is operated below threshold. We observe multistability between the off solution and a large variety of pulsating solutions with different number and arrangements of pulses per round-trip, thus indicating that the mode-locked pulses are localized, i.e. mutually independent. We show that a modulation of the bias current allows controlling the number of the pulses travelling within the cavity, thus suggesting that our system can be operated as an arbitrary pattern generator of 10 ps pulses and 1 W peak power.

Marconi, M; Camelin, P; Chaparro, D; Balle, S; Giudici, M

2015-01-01T23:59:59.000Z

242

Adaptive second order sliding mode control of doubly fed induction generator in wind energy conversion system  

Science Journals Connector (OSTI)

A dynamic synchronous d-q reference frame based modeling and a novel adaptive higher order sliding mode control theory for doubly fed induction generator (DFIG) based wind energy conversion system (WECS) have been proposed in this paper. As depicted from the literature the sliding mode control strategy involving computation of converter currents introduces some inaccuracies for optimal extraction of the power references of the DFIG. On the contrary the proposed method contributes with some important features such as chatter-free performance and heftiness in terms of transient response of the non-linear systems subjected to dynamic conditions such as lower and higher wind speeds. Consequently a higher order sliding mode controller using the active and reactive power of the DFIG as controller inputs has been proposed in this paper. As compared with the other two methods the proposed higher order sliding mode power control souvenirs a significantly improved as well as stable performance of the DFIG based WECS in terms of reduced settling time as well as quickly damping out the oscillations exhibited by the system. The robustness and stability of the proposed control strategy has been validated in MATLAB environment in terms of the comparison of its performance with traditional proportional-integral and existing first-order sliding mode controller (employing converter current as input) subjected to a wide range of disturbances for sub and super synchronous mode of operation of the DFIG subjected to lower and higher wind speeds along with the available practical wind speed data as depicted in the simulation and result section.

2014-01-01T23:59:59.000Z

243

Coal-fired power generation: Proven technologies and pollution control systems  

SciTech Connect

During the last two decades, significant advances have been made in the reduction of emissions from coal-fired power generating plants. New technologies include better understanding of the fundamentals of the formation and destruction of criteria pollutants in combustion processes (low nitrogen oxides burners) and improved methods for separating criteria pollutants from stack gases (FGD technology), as well as efficiency improvements in power plants (clean coal technologies). Future demand for more environmentally benign electric power, however, will lead to even more stringent controls of pollutants (sulphur dioxide and nitrogen oxides) and greenhouse gases such as carbon dioxide.

Balat, M. [University of Mah, Trabzon (Turkey)

2008-07-01T23:59:59.000Z

244

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

SciTech Connect

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

245

Ammonia Generation over TWC for Passive SCR NOX Control for Lean Gasoline Engines  

SciTech Connect

A commercial three-way catalyst (TWC) was evaluated for ammonia (NH3) generation on a 2.0-liter BMW lean burn gasoline direct injection engine as a component in a passive ammonia selective catalytic reduction (SCR) system. The passive NH3 SCR system is a potential low cost approach for controlling nitrogen oxides (NOX) emissions from lean burn gasoline engines. In this system, NH3 is generated over a close-coupled TWC during periodic slightly rich engine operation and subsequently stored on an underfloor SCR catalyst. Upon switching to lean, NOX passes through the TWC and is reduced by the stored NH3 on the SCR catalyst. NH3 generation was evaluated at different air-fuel equivalence ratios at multiple engine speed and load conditions. Near complete conversion of NOX to NH3 was achieved at =0.96 for nearly all conditions studied. At the =0.96 condition, HC emissions were relatively minimal, but CO emissions were significant. Operation at AFRs richer than =0.96 did not provide more NH3 yield and led to higher HC and CO emissions. Results of the reductant conversion and consumption processes were used to calculate a representative fuel consumption of the engine operating with an ideal passive SCR system. The results show a 1-7% fuel economy benefit at various steady-state engine speed and load points relative to a stoichiometric engine operation.

Prikhodko, Vitaly Y [ORNL] [ORNL; Parks, II, James E [ORNL; Pihl, Josh A [ORNL] [ORNL; Toops, Todd J [ORNL] [ORNL

2014-01-01T23:59:59.000Z

246

Optimal Controller Design of a Wind Turbine with Doubly Fed Induction Generator for Small Signal Stability Enhancement  

Science Journals Connector (OSTI)

Multi-objective optimal controller design of a doubly fed induction generator (DFIG) wind turbine system using Differential Evolution ( ... this chapter. A detailed mathematical model of DFIG wind turbine with a ...

Lihui Yang; Guang Ya Yang; Zhao Xu; Zhao Yang Dong; Yusheng Xue

2010-01-01T23:59:59.000Z

247

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 (more)

Payne, Stephen Ellis

2012-01-01T23:59:59.000Z

248

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...

Payne, Stephen Ellis

2012-06-07T23:59:59.000Z

249

Generation and coherent control of even-order harmonics driven by intense frequency-comb and cavity-mode fields inside a fsEC  

E-Print Network (OSTI)

Generation and coherent control of even-order harmonics driven by intense frequency-comb and cavity) doi:10.1088/0953-4075/46/14/145403 Generation and coherent control of even-order harmonics driven, resulting in the generation of even-order harmonics. The high-order harmonic generation (HHG) from a two

Chu, Shih-I

250

Automatic Design Exploration Framework for Multicores with Reconfigurable Accelerators  

E-Print Network (OSTI)

Automatic Design Exploration Framework for Multicores with Reconfigurable Accelerators Cecilia Gonz of multicores with application-specific reconfigurable accelerators. The design exploration is a multi-step flow that performs au- tomatic generation of fine-grained accelerators, automatic parallelization, and testing

Kasahara, Hironori

251

Controllable high-quality electron beam generation by phase slippage effect in layered targets  

E-Print Network (OSTI)

The bubble structure generated by laser and plasma interactions changes in size depending on the local plasma density. The self injection electrons position with respect to wakefield can be controlled by tailoring the longitudinal plasma density. A regime to enhance the energy of the wakefield accelerated electrons and improve the beam quality is proposed and achieved using layered plasmas with increasing densities. Both the wakefield size and the electron bunch duration are significantly contracted in this regime. The electrons remain in the strong acceleration phase of the wakefield while their energy spread decreases because of their tight spatial distribution. An electron beam of 0.5GeV with less than 0.01 energy spread is obtained through 2.5D PIC simulations.

Yu, Q; Li, X F; Huang, S; Zhang, F; Kong, Q; Ma, Y Y; Kawata, S

2014-01-01T23:59:59.000Z

252

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

253

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.

None

2012-03-16T23:59:59.000Z

254

Numerical control user experience  

SciTech Connect

AUTOCON is an acronym for Automatic Contouring, a program which generates a contour toolpath for the external profile of printed writing boards (PWB) using ICEM DDN. AUTOCON originates from the Computer Aided Process Planning (CAPP) Procedure developed by Electrical Manufacturing at Allied Bendix. The CAPP program uses electronically transmitted graphics files received from a design agency to generate automatic panel layouts and travellers for Process Engineers. The objective of AUTOCON is to utilize the information from the CAPP program to generate Numerical Control tapes. If the CAPP program can be utilized to its full potential, it is estimated that a good portion of the 60 to 90 PWB tapes shipped each month from our Numerical Control Department could be eliminated from conventional N/C Programming. The purpose of AUTOCON is to automatically generate a toolpath around the external profile of a PWB with no user intervention. The Process Engineer can generate a profile contour N/C tape after he has completed the panel layout and traveller through CAPPS for a part. After the layout and traveller illustrations have been completed, the same geometry can then be utilized again for the N/C tape. An N/C Analysist then reviews the listing for a final checkout of the job. 13 figs.

Butler, J.

1985-10-01T23:59:59.000Z

255

E-Print Network 3.0 - automatism Sample Search Results  

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

Summer Project Cooperative Control of Aerial and Ground Robots Summary: testbed for mobile robots has been built this summer at Automatic Control Lab, KTH. The primary... ....

256

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

257

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

258

Automatic Parallelization of Object Oriented Models Executed with Inline Solvers  

Science Journals Connector (OSTI)

In this work we report preliminary results of automatically generating parallel code from equation-based models together at two levels: Performing inline expansion of a Runge-Kutta solver combined with fine-gr...

Hkan Lundvall; Peter Fritzson

2007-01-01T23:59:59.000Z

259

Automatic input rectification  

E-Print Network (OSTI)

We present a novel technique, automatic input rectification, and a prototype implementation, SOAP. SOAP learns a set of constraints characterizing typical inputs that an application is highly likely to process correctly. ...

Long, Fan

260

Automatic Input Rectification  

E-Print Network (OSTI)

We present a novel technique, automatic input rectification, and a prototype implementation called SOAP. SOAP learns a set of constraints characterizing typical inputs that an application is highly likely to process ...

Long, Fan

2011-10-03T23:59:59.000Z

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

Ancestral Nesson anticline and associated geothermal anomalies: Enhanced hydrocarbon generation controlled by crustal structure  

SciTech Connect

Hydrocarbon generation in the Williston basin is influenced by crustal motions and geothermal gradient anomalies associated with the ancestral Nesson anticline, a long-lived crustal structure located along 103{degree} longitude. This structure and its effects are particularly important in Canada where most petroleum source rocks were not sufficiently buried to have generated hydrocarbons in a normal geothermal gradient environment. High geothermal gradients associated with this structure raise the oil window and expand the region of source rock thermal maturity. Ancestral Nesson structure subsided differentially throughout the Phanerozoic, controlling paleobathymetry and facies over its crest. During the Upper Ordovician the structure was positive; rich potential petroleum source rocks were deposited on the western flank of the structure, generally excluding them from the zone of elevated heat flows. The total petroleum potential of this oil-source system exceeds 5.5 billion bbl of oil equivalent in Canada alone. Unfortunately, its exclusion from the maturation anomaly results in no more than 200 million bbl of oil being expelled from these sources. During the Middle Devonian, the structure was a negative feature that formed a starved subbasin separating the Winnipegosis and Elm Point carbonate shelves. Rich potential petroleum source rocks that accumulated on the crest of the structure at that time now overlie the region of elevated heat that flows and enhanced hydrocarbon maturation. Two billion barrels of oil are estimated to have been expelled from this source rock. Understanding the history and tectonics of the ancestral Nesson anticline is fundamental to a correct appraisal of hydrocarbon resources in the Williston basin.

Osadetz, K.G.; Snowdon, L.R. (Geological Survey of Canada, Calgary, Alberta (Canada))

1989-09-01T23:59:59.000Z

262

E-Print Network 3.0 - automatic fuzzy rule Sample Search Results  

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

PROCESSING TO PREDICT PULP BRIGHTNESS USING FUZZY LOGICPULP BRIGHTNESS USING FUZZY LOGIC Summary: Decision Support System (FuzzyFlou) Automatic Generation of Fuzzy Knowledge...

263

E-Print Network 3.0 - automatic hexahedral mesh Sample Search...  

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

Sheffer Summary: of hexahedral meshes the modification options available are much more limited. Automatic hexahedral mesh... and hexahedral mesh generation 12. Adjustment of...

264

Dynamic Rabi sidebands in laser-generated microplasmas: Tunability and control  

SciTech Connect

Broadband, coherent radiation in the optical-frequency range is generated using microplasma channels in atmospheric gases in a pump-probe experiment. A microplasma medium is created in a gas by a focused intense femtosecond pump pulse. A picosecond probe pulse then interacts with this microplasma channel, producing broad, coherent sidebands that are associated with luminescence lines and are redshifted and blueshifted with respect to the laser carrier frequency. These sidebands originate from the induced Rabi oscillations between pairs of excited states that are coupled by the probe pulse. Thus the sideband radiation intensity tracks the microplasma evolution. The sidebands arise from broad and tunable Rabi shifts corresponding to varying values of the electric-field magnitude in the probe pulse. The {approx}10{sup 10} W cm{sup -2} probe beam creates a maximum sideband shift of >90 meV from the carrier frequency, resulting in an effective bandwidth of 200 meV. The sidebands can be tuned and controlled by the intensity and temporal profile of the probe pulse. The fact that the coherence is observed in a microplasma demonstrates that Rabi cycling is possible at high temperature with moderately high laser intensities as long as transitions close to the driving frequency ({Delta}{approx}2%{omega}{sub c}) are available. Plasma excitation combined with Rabi-shifting measurements also serves as a means to simultaneously extract quantitative ratios for the transition-dipole moments between multiple sets of highly excited states with transitions in the optical regime.

Compton, R.; Filin, A.; Levis, R. J. [Center for Advanced Photonics Research, College of Science and Technology, Temple University, Philadelphia, Pennsylvania 19122 (United States); Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122 (United States); Romanov, D. A. [Center for Advanced Photonics Research, College of Science and Technology, Temple University, Philadelphia, Pennsylvania 19122 (United States); Department of Physics, Temple University, Philadelphia, Pennsylvania 19122 (United States)

2011-05-15T23:59:59.000Z

265

Design and Development of Controller for Stand-Alone Wind Driven Self-excited Induction Generator  

Science Journals Connector (OSTI)

The 3-? self-excited induction generator driven by wind energy source is suitable ... capacitance required for self-excitation of 3-? induction generator is taken up in this work and...

M. Sathyakala; M. Arutchelvi

2013-01-01T23:59:59.000Z

266

Variable-Speed Wind Generator System with Maximum Output Power Control  

Science Journals Connector (OSTI)

To achieve maximum output power from wind generator systems, the rotational speed of wind generators should be adjusted in real time according to natural wind speed. This chapter pays attention to an optimum rota...

Yoko Amano

2013-01-01T23:59:59.000Z

267

AN AUTOMATIC STREAM DRIFT SAMPLER  

Science Journals Connector (OSTI)

hour and is chain-driven by means of an electric motor ( 12 v, 60 w ). The motor is controlled with a converter (220 v, 50 cycles), pulse generator, relay, and limit.

1999-12-27T23:59:59.000Z

268

2013 IREP Symposium-Bulk Power System Dynamics and Control -IX (IREP), August 25-30, 2013, Rethymnon, Greece Effects of Various Uncertainty Sources on  

E-Print Network (OSTI)

of uncertainty arising from renewable-based electricity generation and noise in communication channels on the AGC) must schedule adequate electric supply from traditional generators on AGC to manage larger net system, Rethymnon, Greece Effects of Various Uncertainty Sources on Automatic Generation Control Systems D

Liberzon, Daniel

269

Automatic UAV Landing with Ground Target Maintained in the Field of View  

E-Print Network (OSTI)

Automatic UAV Landing with Ground Target Maintained in the Field of View Laurent Burlion and Henry de Plinval Abstract In this paper, a key feature for UAV visual servoing in automatic land- ing. First, a control law for UAV automatic landing is proposed. Then, the output con- straint method

270

Reaction force control implementation of a linear generator in irregular waves for a wave power system.  

E-Print Network (OSTI)

??Most designs for wave energy converters include a hydraulic (or pneumatic) interface between the wave device and the generator to smooth electricity production, but a (more)

Li, Bin

2012-01-01T23:59:59.000Z

271

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

E-Print Network (OSTI)

Wind-Powered Generation Examples are: The rough running bands of hydro turbines Loadings of coal burning steam plants at which coal mills

Lacommare, Kristina S H

2011-01-01T23:59:59.000Z

272

The Optimal Power Tracking Control Strategy of Grid-Connected Excited Synchronous Wind Power Generator.  

E-Print Network (OSTI)

??In this thesis, the wind power system is a coaxial coupling structure between servo motor and excited synchronous wind power generator. By using the excited (more)

Cheng, Wen-kai

2014-01-01T23:59:59.000Z

273

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

274

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

SciTech Connect

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

275

Automatic Tracking Solar Street Light Based on Microcontroller  

Science Journals Connector (OSTI)

This paper designed an automatic tracking solar lights based on microcontroller, mainly by the solar panels, solar auto-tracking controller, batteries, lights and other components. Through the solar sensor cir...

Liu Zhen Ya; Guan Chen Zhi; Yan-hu Jiang

2012-01-01T23:59:59.000Z

276

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,

277

Self-triggered Communication Enabled Control of Distributed Generation in Microgrids  

E-Print Network (OSTI)

Tahir Member, IEEE Dept. of Elect. Eng. and Al-Khwarizmi Institute of Comp. Science University. System reliability for secondary control in microgrids can be improved by using a distributed cooperative control approach. For realizing the cooperative control of multiple DGs in smart-grid, a multi-agent based

Mazumder, Sudip K.

278

Automatic off-body overset adaptive Cartesian mesh method based on an octree approach  

SciTech Connect

This paper describes a method for generating adaptive structured Cartesian grids within a near-body/off-body mesh partitioning framework for the flow simulation around complex geometries. The off-body Cartesian mesh generation derives from an octree structure, assuming each octree leaf node defines a structured Cartesian block. This enables one to take into account the large scale discrepancies in terms of resolution between the different bodies involved in the simulation, with minimum memory requirements. Two different conversions from the octree to Cartesian grids are proposed: the first one generates Adaptive Mesh Refinement (AMR) type grid systems, and the second one generates abutting or minimally overlapping Cartesian grid set. We also introduce an algorithm to control the number of points at each adaptation, that automatically determines relevant values of the refinement indicator driving the grid refinement and coarsening. An application to a wing tip vortex computation assesses the capability of the method to capture accurately the flow features.

Peron, Stephanie, E-mail: stephanie.peron@onera.fr [ONERA - The French Aerospace Lab, F-92322 Chatillon (France)] [ONERA - The French Aerospace Lab, F-92322 Chatillon (France); Benoit, Christophe, E-mail: christophe.benoit@onera.fr [ONERA - The French Aerospace Lab, F-92322 Chatillon (France)] [ONERA - The French Aerospace Lab, F-92322 Chatillon (France)

2013-01-01T23:59:59.000Z

279

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

280

Two-color phase control of high-order harmonic generation in intense laser fields  

E-Print Network (OSTI)

We present a time-independent generalized Floquet approach for nonperturbative treatment of high-order harmonic generation (HG) in intense onea (i) determination of the complex quasienergy eigenvalue and eigenfunction by means of the non...

Telnov, Dmitry A.; Wang, Jingyan; Chu, Shih-I

1995-11-01T23:59:59.000Z

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.


281

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

282

Generators and the replicator control structure in the parallel environment of ALLOY  

Science Journals Connector (OSTI)

The need for searching a space of solutions appears often. Many problems, such as iteration over a dynamically created domain, can be expressed most naturally using a generate-and-process style. Serial programming languages typically support solutions ...

Thanasis Mitsolides; Malcolm Harrison

1990-06-01T23:59:59.000Z

283

Fault-tolerant control for current sensors of doubly fed induction generators based on an improved fault detection method  

Science Journals Connector (OSTI)

Abstract Fault-tolerant control of current sensors is studied in this paper to improve the reliability of a doubly fed induction generator (DFIG). A fault-tolerant control system of current sensors is presented for the DFIG, which consists of a new current observer and an improved current sensor fault detection algorithm. The current observer is constructed by using only voltage signals as inputs. The fault detection algorithm is based on the current observer, in which an adaptive threshold and different fault duration times are considered. The performance of the proposed observer, improved fault detection algorithm, and fault-tolerant control system are investigated by simulation. The results indicate that the outputs of the observer and the sensor are highly coherent. The fault detection algorithm can efficiently detect both soft and hard faults in current sensors, and the fault-tolerant control system can effectively tolerate both types of faults.

H. Li; C. Yang; Y.G. Hu; B. Zhao; M. Zhao; Z. Chen

2014-01-01T23:59:59.000Z

284

Automatic Production and Visualization of Urban Models from Building Allocation Plans  

E-Print Network (OSTI)

Automatic Production and Visualization of Urban Models from Building Allocation Plans Oguzcan Oguz presents a method for automatic generation of building models to be used in virtual city models for this work is to generate 3D city models using 2D city plans consistent with the real shapes of the buildings

Güdükbay, Ugur

285

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

286

Automatic programming of AGVS simulation models  

E-Print Network (OSTI)

restricted its rule base and stack size. While expanded memory to 2M bytes is available for these machines, Turbo Prolog is not currently designed to utilize the Lotus/Intel/MicroSoft protocol necessary for supporting this environment. This problem might...). The modeling system is capable of guiding and assisting the engineer with a level of "expertise" comparable to a trained simulation specialist. The modeling support program is an automatic programming system, written in Turbo Prolog which generates...

Brazier, Mark Kevin

2012-06-07T23:59:59.000Z

287

An automatic acquisition/quality control/fast delivery software for real time follow-up of data coming from a tide gauge network  

E-Print Network (OSTI)

software Sensors survey is already operational on the LEGOS intranet Web site. Quality control will soon characteristics #12;Processing program is based on modules written in Perl language. It gives the possibility

288

Enhancing and controlling single-atom high-harmonic generation spectra: a time-dependent density-functional scheme  

E-Print Network (OSTI)

High harmonic generation (HHG) provides a flexible framework for the development of coherent light sources in the extreme-ultraviolet and soft x-ray regimes. However it suffers from low conversion efficiencies as the control of the HHG spectral and temporal characteristics requires manipulating electron trajectories on attosecond time scale. The phase matching mechanism has been employed to selectively enhance specific quantum paths leading to HHG. A few important fundamental questions remain open, among those how much of the enhancement can be achieved by the single-emitter and what is the role of correlations (or the electronic structure) in the selectivity and control of HHG generation. Here we address those questions by examining computationally the possibility of optimizing the HHG spectrum of isolated Hydrogen and Helium atoms by shaping the slowly varying envelope of a 800 nm, 200-cycles long laser pulse. The spectra are computed with a fully quantum mechanical description, by explicitly computing the ...

Castro, Alberto; Gross, E K U

2014-01-01T23:59:59.000Z

289

E-Print Network 3.0 - automatic braking Sample Search Results  

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

for an Urban Electric Vehicle Summary: , Automatic Braking, Electric Vehicles, Personal Rapid Transit, Public Transit, Advanced Vehicle Control... the design modification,...

290

E-Print Network 3.0 - automatic submerged arc Sample Search Results  

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

(material 1) and then probed with a second... automatically controlled using a LabVIEW software program. In a typical contact experiment, the polymer gel Source: Messersmith,...

291

E-Print Network 3.0 - automatic evaluation system Sample Search...  

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

more and more often employed to obtain inherently robust solutions to many... testbed for mobile robots has been built this summer at Automatic Control Lab, KTH. The primary......

292

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

293

Modelling and control of multi-terminal HVDC networks for offshore wind power generation.  

E-Print Network (OSTI)

??Due to the recent developments in semiconductors and control equipment, Voltage Source Converter based High Voltage Direct Current (VSC-HVDC) becomes a promising technology for grid (more)

Zhou, Shu

2011-01-01T23:59:59.000Z

294

RELIABILITY IMPROVEMENT OF BART TRAIN CONTROL  

E-Print Network (OSTI)

2) of the BART Automatic Train Control System. BART 74-111,certain functions of the train controls that had previously2. BART vehicle automatic train control equipment. XBL 7810-

Turner, D.B.

2011-01-01T23:59:59.000Z

295

Controlling the Interference of Multiple Molecular Orbitals in High-Harmonic Generation  

SciTech Connect

We demonstrate a new method to investigate the origin of spectral structures in high-harmonic generation. We report detailed measurements of high-harmonic spectra in aligned nitrogen and carbon dioxide molecules. Varying the wavelength and intensity of the generating laser field, we show that the minimum in aligned N{sub 2} molecules is nearly unaffected, whereas the minimum in aligned CO{sub 2} molecules shifts over more than 15 eV. Our quantitative analysis shows that both the interference of multiple orbitals and their structural characteristics affect the position of the minimum. Our method provides a simple approach to the investigation of the high-harmonic generation process in more complex molecules.

Woerner, H. J.; Bertrand, J. B.; Hockett, P.; Corkum, P. B.; Villeneuve, D. M. [Joint Laboratory for Attosecond Science, National Research Council of Canada and University of Ottawa, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6 (Canada)

2010-06-11T23:59:59.000Z

296

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

297

Control Engineering Practice 10 (2002) 615624 Stabilizer design for industrial co-generation systems  

E-Print Network (OSTI)

, whose quantity (measured by its flow rate) and quality (measured by its pressure and temperature) play boilers, three CO-type boilers and two once-through steam generators (OTSG). The header system includes receives steam from the boiler system and then distributes the steam for three different usages: (i

Marquez, Horacio J.

298

Modeling and Control of Co-generation Power Plants: A Hybrid System Approach  

E-Print Network (OSTI)

cycle is driven by some fossil fuel (usually natural gas) and produces electric power via expansion of the gas turbine and generates both electricity and steam for the industrial processes. Clearly, the liberalization of the energy market has promoted the need of operating CCPPs in the most efficient way

Ferrari-Trecate, Giancarlo

299

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

300

Nonlinear Control of the Doubly Fed Induction Generator by Input-Output Linearizing Strategy  

Science Journals Connector (OSTI)

With regard to a nonlinear system, the approximate linearized system is convenient to design the controller using method of linear systems, but it does not match to the nonlinear nature of the system. And that...

Guodong Chen; Luhua Zhang; Xu Cai; Wei Zhang

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.


301

A study of alternative drive control interfaces for next-generation electric vehicles  

E-Print Network (OSTI)

The drive control interface in automobiles has not significantly changed for almost a century. Recent advances in electric vehicles and drive-by-wire technology allow for new alternative interfaces that enable novel vehicle ...

Post, C. Christopher (Charles Christopher)

2011-01-01T23:59:59.000Z

302

Generation of non-local evolution loops and exchange operations for quantum control in three dimensional anisotropic Ising model  

E-Print Network (OSTI)

Control of quantum entanglement has been considered as elemental physical resource for quantum applications in Quantum Information and Quantum Computation. Control of entangled states on a couple of atoms, ions or quantum dots are milestones in almost all quantum applications towards a scalable spin-based quantum computers or quantum devices. For magnetic systems, Ising model is an interaction which generates and modi?es entanglement properties of quantum systems based on matter. In addition, when this interaction includes driven magnetic ?elds, it can be controlled to sustain, characterize or modify entanglement and other quantum properties. In this work, recent results about evolution in a general anisotropic three dimensional Ising model including an inhomogeneous magnetic ?eld is considered to obtain some general quantum control e?ects for their sustainability, programmed evolution or transformation: Evolution loops and Exchange operations. This control is achievable through a set of physical parameters, whose prescriptions are reported. The use of a non local basis in the model to express time evolution lets take advantage to describe and control the system, in particular with those issues associated with entanglement and operations mentioned before. Finally, some analysis about equivalent gates based on our development is made including an example with teleportation, using one of the gates constructed.

Francisco Delgado

2014-10-21T23:59:59.000Z

303

Evaluation of anticipatory signal to steam generator pressure control program for 700 MWe Indian pressurized heavy water reactor  

SciTech Connect

700 MWe Indian Pressurized Heavy Water Reactor (IPHWR) is horizontal channel type reactor with partial boiling at channel outlet. Due to boiling, it has a large volume of vapor present in the primary loops. It has two primary loops connected with the help of pressurizer surge line. The pressurizer has a large capacity and is partly filled by liquid and partly by vapor. Large vapor volume improves compressibility of the system. During turbine trip or load rejection, pressure builds up in Steam Generator (SG). This leads to pressurization of Primary Heat Transport System (PHTS). To control pressurization of SG and PHTS, around 70% of the steam generated in SG is dumped into the condenser by opening Condenser Steam Dump Valves (CSDVs) and rest of the steam is released to the atmosphere by opening Atmospheric Steam Discharge Valves (ASDVs) immediately after sensing the event. This is accomplished by adding anticipatory signal to the output of SG pressure controller. Anticipatory signal is proportional to the thermal power of reactor and the proportionality constant is set so that SG pressure controller's output jacks up to ASDV opening range when operating at 100% FP. To simulate this behavior for 700 MWe IPHWR, Primary and secondary heat transport system is modeled. SG pressure control and other process control program have also been modeled to capture overall plant dynamics. Analysis has been carried out with 3-D neutron kinetics coupled thermal hydraulic computer code ATMIKA.T to evaluate the effect of the anticipatory signal on PHT pressure and over all plant dynamics during turbine trip in 700 MWe IPHWR. This paper brings out the results of the analysis with and without considering anticipatory signal in SG pressure control program during turbine trip. (authors)

Pahari, S.; Hajela, S.; Rammohan, H. P.; Malhotra, P. K.; Ghadge, S. G. [Nuclear Power Corporation of India Limited, Nabhikiya Urja Bhavan, Anushakti Nagar, Mumbai, PIN-400094 (India)

2012-07-01T23:59:59.000Z

304

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

SciTech Connect

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

305

A new HBMO algorithm for multiobjective daily Volt/Var control in distribution systems considering Distributed Generators  

Science Journals Connector (OSTI)

In recent years, Distributed Generators (DGs) connected to the distribution network have received increasing attention. The connection of enormous \\{DGs\\} into existing distribution network changes the operation of distribution systems. Because of the small X/R ratio and radial structure of distribution systems, \\{DGs\\} affect the daily Volt/Var control. This paper presents a new algorithm for multiobjective daily Volt/Var control in distribution systems including Distributed Generators (DGs). The objectives are costs of energy generation by \\{DGs\\} and distribution companies, electrical energy losses and the voltage deviations for the next day. A new optimization algorithm based on a Chaotic Improved Honey Bee Mating Optimization (CIHBMO) is proposed to determine the active power values of DGs, reactive power values of capacitors and tap positions of transformers for the next day. Since objectives are not the same, a fuzzy system is used to calculate the best solution. The plausibility of the proposed algorithm is demonstrated and its performance is compared with other methods on a 69-bus distribution feeder. Simulation results illustrate that the proposed algorithm has better outperforms the other algorithms.

Taher Niknam

2011-01-01T23:59:59.000Z

306

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

307

Automatic CX Tool for Electrical Building  

E-Print Network (OSTI)

management have been reached [ASHRAE, 2005]. The aim of this paper is to show the methodology used to develop an automatic Cx tool for electrical buildings. The tool contains, on the one hand, several Functional Test Procedures (FTPs) for most... temperature control (set point temperature, etc), Lighting & Ventilation: scheduling, zoning, Domestic hot water: scheduling. METHODOLOGY AND TOOL SPECIFICATIONS This Cx tool is intended for the end user, i.e. the energy manager. A particular...

Couillaud, N.; Jandon, M.; Viaud, B.; Clemoncon, B.

2007-01-01T23:59:59.000Z

308

Kernel for modular robot applications: Automatic modeling techniques  

SciTech Connect

A modular robotic system consists of standardized joint and link units that an be assembled into various kinematic configurations for different types of tasks. For the control and simulation of such a system, manual derivation of the kinematic and dynamic models, as well as the error model for kinematic calibration, require tremendous effort, because the models constantly change as the robot geometry is altered after module reconfiguration. This paper presents a frame-work to facilitate the model-generation procedure for the control and simulation of the modular robot system. A graph technique, termed kinematic graphs and realized through assembly incidence matrices (AIM), is introduced to represent the module-assembly sequence and robot geometry. The kinematics and dynamics are formulated based on a local representation of the theory of lie groups and Lie algebras. The automatic model-generation procedure starts with a given assembly graph of the modular robot. Kinematic, dynamic, and error models of the robot are then established, based on the local representations and iterative graph-traversing algorithms. This approach can be applied to a modular robot with both serial and branch-type geometries, and arbitrary degrees of freedom. Furthermore, the AIM of the robot naturally leads to solving the task-oriented optimal configuration problem in modular robots. There is no need to maintain a huge library of robot models, and the footprint of the overall software system can be reduced.

Chen, I.M.; Yeo, S.H.; Chen, G. [Nanyang Technological Univ. (Singapore). School of Mechanical and production Engineering] [Nanyang Technological Univ. (Singapore). School of Mechanical and production Engineering; Yang, G. [Gintic Inst. of Manufacturing Technology (Singapore). Automation Technology Div.] [Gintic Inst. of Manufacturing Technology (Singapore). Automation Technology Div.

1999-02-01T23:59:59.000Z

309

A novel control strategy of a distributed generator operating in seven modes for ancillary services under grid faults  

Science Journals Connector (OSTI)

This study was interested in a renewable distributed generator (RDG) made up of a wind turbine used as a principal source and a supercapacitor (SC) considered as a storage system. The studied RDG is associated with loads to constitute a micro-grid (MG) which can operate in grid connected mode, stand alone mode or synchronization mode. The objective of this work is to investigate a novel control scheme for MG integrated into power electrical system in order to maintain the voltage and the frequency of the grid in an allowable range and to ensure the continuity of power supply in case of grid failure. This control strategy made up of two parts: the first one is the power management algorithm used to detect islanding in case of defect and to monitor the RDG into seven operating modes. The second one is the droop control used to control the exported or imported active and reactive powers transferred with the grid ensuring its stability by adjusting the frequency and amplitude of its output voltage. The system is simulated using MATLAB software and results are provided in order to show the feasibility of this control strategy.

Mouna Rekik; Achraf Abdelkafi; Lotfi Krichen

2013-01-01T23:59:59.000Z

310

Assessment of energy and economic impacts of particulate-control technologies in coal-fired power generation  

SciTech Connect

Under contract to Argonne National Laboratory, Midwest Research Institute has derived models to assess the economic and energy impacts of particulate-control systems for coal-fired power plants. The models take into account the major functional variables, including plant size and location, coal type, and applicable particulate-emission standards. The algorithms obtained predict equipment and installation costs, as well as operating costs (including energy usage), for five control devices: (1) cold-side electrostatic precipitators, (2) hot-side electrostatic precipitators, (3) reverse-flow baghouses, (4) shake baghouses, and (5) wet scrubbers. A steam-generator performance model has been developed, and the output from this model has been used as input for the control-device performance models that specify required design and operating parameters for the control systems under study. These parameters then have been used as inputs to the cost models. Suitable guideline values have been provided for independent variables wherever necessary, and three case studies are presented to demonstrate application of the subject models. The control-equipment models aggregate the following cost items: (1) first costs (capital investment), (2) total, first-year annualized costs, and (3) integrated cost of ownership and operation over any selected plant lifetime. Although the models have been programmed for rapid computation, the algorithms can be solved with a hand calculator.

Not Available

1980-04-01T23:59:59.000Z

311

A new approach based on ant colony optimization for daily Volt/Var control in distribution networks considering distributed generators  

Science Journals Connector (OSTI)

This paper presents a new approach to daily Volt/Var control in distribution systems with regard to distributed generators (DGs). Due to the small X/R ratio and radial configuration of distribution systems, \\{DGs\\} have much impact on this problem. A cost-based compensation methodology is proposed as a proper signal to encourage owners of \\{DGs\\} in active and reactive power generation. An evolutionary method based on ant colony optimization (ACO) is used to determine the active and reactive power values of DGs, reactive power values of capacitors and tap positions of transformers for the next day. The results indicate that the proposed encouraging factor has improved the performance of distribution networks on a large scale.

Taher Niknam

2008-01-01T23:59:59.000Z

312

Real-Time Deferrable Load Control: Handling the Uncertainties of Renewable Generation  

E-Print Network (OSTI)

@caltech.edu Steven H. Low California Inst. of Tech. slow@caltech.edu ABSTRACT Real-time demand response is potential loads, including electric vehicles and smart appliances, will participate in demand response smart grid, deferrable load control, demand response 1. INTRODUCTION Real-time demand response seeks

Low, Steven H.

313

Generation and Control of Chains of Entangled Atom-Ion Pairs with Quantum Light  

SciTech Connect

Coherent control using quantum light incident upon molecules in an optical lattice is shown to give rise to a direct way of writing arbitrary sequences of entangled atom-ion pairs. There is no evident limitation on the length of the word (i.e., the number of qbits) that can be formed.

Shapiro, Moshe [Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z3 (Canada); Department of Chemical Physics, Weizmann Institute, Rehovot 76100 (Israel); Brumer, Paul [Chemical Physics Theory Group, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6 (Canada)

2011-04-15T23:59:59.000Z

314

Continuous Control Primitive Trajectory Generation and Optimal Motion Splines for All-Wheel Steering Mobile  

E-Print Network (OSTI)

on the Rocky 8 rover platform, where parameterized linear velocity, curvature, and path heading controls of the wheels are steerable (e.g. Rocky 8, shown), the body can rotate about any point in the local tangent has dealt with finding obstacle-free paths subject to nonholnomic constraints assuming flat terrain

Kelly, Alonzo

315

Nonlinear Adaptive Control of Networked Power Generators with Remote Measurement Units  

E-Print Network (OSTI)

provided by Phasor Measurement Units (PMU). The proposed control system is designed in a robust way illustrate its good behavior, and suggest that the new measurement and data transmission devices can bring Measurement Units (PMU). These devices are far beyond SCADA, and let one envisage the use of real time remote

Paris-Sud XI, Université de

316

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)

317

Work of the All-Russian Scientific Research Institute of Automatics with the U.S. laboratory-to-laboratory program for cooperation on nuclear materials protection, control, and accounting  

SciTech Connect

The All-Russian Scientific Research Institute of Automatics (VNIIA) is one of the scientific research institutes participating in the US/Russian Laboratory-to-Laboratory Program in Nuclear Materials Protection, Control, and Accounting (MPC and A). The Institute has provided instrumentation and measurement techniques to the Russian defense program and to the medical, gas and oil, and manufacturing industries. VNIIA is improving MPC and A in Russia by providing support to the Russian institutes and enterprises in the Ministry of Atomic Energy. VNIIA has a primary role in determining the requirements and specifications and developing procedures for testing and certification of MPC and A equipment, and is instrumental in strengthening the Russian infrastructure for supplying MPC and A equipment. Contracts have been placed with VNIIA by Russian suppliers to test, certify, and prepare for manufacturing hand-held special nuclear material detection equipment they have developed. A contract also is in place with VNIIA to test and evaluate a US-manufactured pedestrian portal monitor. Work for 1996 includes certifying these portal monitors and portable radiation detection equipment for use in Russian facilities, testing and evaluating a US active well coincidence counter and gamma-ray isotopic measurement methods, and developing guidelines for statistical evaluation methods used in MPC and A. This paper reviews the status of this effort and describes the plans for continuing this work in 1996.

Griggs, J.R.; Smoot, J.L. [Pacific Northwest National Lab., Richland, WA (United States); Hoida, Hiroshi [Los Alamos National Lab., NM (United States)] [and others

1996-12-31T23:59:59.000Z

318

Modelling and control of a variable speed wind turbine driving doubly fed induction generator using three-level PWM converter  

Science Journals Connector (OSTI)

The aim of this researcher is to develop a complete wind central model driven doubly fed induction generator (DFIG) which feeds an AC power grid. For that, two-pulse width modulated (PWM) voltage converters are connected back to back between the rotor terminals of DFIG and the utility grid via a common DC link, in there, our contribution will appear in the utilisation of three levels voltage inverters in order to ameliorate the energy quality. The simulation was carried out on a 2 MW wind-turbine driven DFIG system and the developed unified model validity and the proposed control strategies feasibility are all confirmed by the simulated results.

Fairouz Kendouli; Khoudir Abed; Khalil Nabti; Hocine Benalla

2012-01-01T23:59:59.000Z

319

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

320

Control Loop for a Pulse Generator of a Fast Septum Magnet using DSP and Fuzzy Logic  

E-Print Network (OSTI)

A prototype of a fast pulsed eddy current septum magnet for one of thebeam extraction's from the SPS towards LHC is under development. The precision of the magnetic field must be better than 1.0 10-4 during a flat top of 30 s. The current pulse is generated by discharging the capacitors of a LC circuit that resonates on the 1st and on the 3rd harmonic of a sine wave with a repetition rate of 15 s. The parameters of the circuit and the voltage on the capacitors must be carefully adjusted to meet the specifications. Drifts during operation must be corrected between two pulses by mechanically adjusting the inductance of the coil in the generator as well as the primary capacitor voltage. This adjustment process is automated by acquiring the current pulse waveform with sufficient time and amplitude resolution, calculating the corrections needed and applying these corrections to the hardware for the next pulse. A very cost-effective and practical solution for this adjustment process is the integration of off-th...

Aldaz-Carroll, E; Dieperink, J H; Schrder, G; Vossenberg, Eugne B

1997-01-01T23:59:59.000Z

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.


321

Control of traveling-wave oscillations and bifurcation behavior in central pattern generators  

Science Journals Connector (OSTI)

Understanding synchronous and traveling-wave oscillations, particularly as they relate to transitions between different types of behavior, is a central problem in modeling biological systems. Here, we address this problem in the context of central pattern generators (CPGs). We use contraction theory to establish the global stability of a traveling-wave or synchronous oscillation, determined by the type of coupling. This opens the door to better design of coupling architectures to create the desired type of stable oscillations. We then use coupling that is both amplitude and phase dependent to create either globally stable synchronous or traveling-wave solutions. Using the CPG motor neuron network of a leech as an example, we show that while both traveling and synchronous oscillations can be achieved by several types of coupling, the transition between different types of behavior is dictated by a specific coupling architecture. In particular, it is only the repulsive but not the commonly used phase or rotational coupling that can explain the transition to high-frequency synchronous oscillations that have been observed in the heartbeat pattern generator of a leech. This shows that the overall dynamics of a CPG can be highly sensitive to the type of coupling used, even for coupling architectures that are widely believed to produce the same qualitative behavior.

Alexandra S. Landsman and Jean-Jacques Slotine

2012-10-23T23:59:59.000Z

322

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

Science Journals Connector (OSTI)

A protection scheme of a doubly fed induction generator (DFIG) based wind turbine system during faults is crowbar activation. With this protection the rotor side converter (RSC) is temporarily disconnected and its vector control over the stator active and reactive power is lost leading to poor power quality at the point of common coupling (PCC). This paper presents a new protection scheme for transient rotor current to improve the performance of DFIG during grid disturbance. The new scheme consisting of a crowbar and series circuit is connected between the rotor windings and RSC to enhance the low voltage ride-through capability of DFIG. The proposed scheme successfully limits the transient rotor current and dc-link voltage and a disconnection of RSC from the rotor windings is avoided during fault. Additionally RSC and grid-side converter controllers are modified to improve the voltage at PCC. Simulations on matlab/Simulink verify the effectiveness of the proposed scheme.

Jackson John Justo; Kyoung-Soo Ro

2012-01-01T23:59:59.000Z

323

Automatic readout micrometer  

DOE Patents (OSTI)

A measuring system is disclosed for surveying and very accurately positioning objects with respect to a reference line. A principal use of this surveying system is for accurately aligning the electromagnets which direct a particle beam emitted from a particle accelerator. Prior art surveying systems require highly skilled surveyors. Prior art systems include, for example, optical surveying systems which are susceptible to operator reading errors, and celestial navigation-type surveying systems, with their inherent complexities. The present invention provides an automatic readout micrometer which can very accurately measure distances. The invention has a simplicity of operation which practically eliminates the possibilities of operator optical reading error, owning to the elimination of traditional optical alignments for making measurements. The invention has an extendable arm which carries a laser surveying target. The extendable arm can be continuously positioned over its entire length of travel by either a coarse or fine adjustment without having the fine adjustment outrun the coarse adjustment until a reference laser beam is centered on the target as indicated by a digital readout. The length of the micrometer can then be accurately and automatically read by a computer and compared with a standardized set of alignment measurements. Due to its construction, the micrometer eliminates any errors due to temperature changes when the system is operated within a standard operating temperature range.

Lauritzen, Ted (Lafayette, CA)

1982-01-01T23:59:59.000Z

324

Autonomous, teleoperated, and shared control of robot systems  

SciTech Connect

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

325

An Investigation into the Validity of Some Metrics for Automatically Evaluating Natural  

E-Print Network (OSTI)

of computer-generated weather forecasts. Our results suggest that, at least in this domain, metrics mayAn Investigation into the Validity of Some Metrics for Automatically Evaluating Natural Language interest in using automatically computed corpus-based evaluation metrics to evaluate Natural Language

326

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

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

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

327

E-Print Network 3.0 - automatic beam steering Sample Search Results  

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

some steering. 12;NuFACT08NuFACT08 -- 4 July4 July S. ChildressS. Childress -- Proton Beams... ControlPrimary Beam Position Control Automatic adjustment ... Source: McDonald,...

328

www.jatit.org ARTIFICIAL INTELLIGENCE BASED TUNING OF SVC CONTROLLER FOR CO-GENERATED POWER SYSTEM  

E-Print Network (OSTI)

The gain of SVC depends upon the type of reactive power load for optimum performance. As the load and input wind power conditions are variable, the gain setting of SVC needs to be adjusted or tuned. In this paper, an ANN based approach has been used to tune the gain parameters of the SVC controller over a wide range of load characteristics. The multi-layer feed-forward ANN tool with the error backpropagation training method is employed. Loads have been taken as the function of voltage. Analytical techniques have mostly been based on impedance load reduced network models, which suffer from several disadvantages, including inadequate load representation and lack of structural integrity. The ability of ANNs to spontaneously learn from examples, reason over inexact and fuzzy data and provide adequate and quick responses to new information not previously stored in memory has generated high performance dynamical system with unprecedented robustness. ANNs models have been developed for different hybrid power system configurations for tuning the proportional-integral controller for SVC. Transient responses of different autonomous configurations show that SVC controller with its gained tuned by the ANNs provide optimum system performance for a variety of loads.

Vinod Kumar

329

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

Science Journals Connector (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 the DG system contains a Fuel cell and a Supercapacitor storage device. A gas turbine system is modeled in order to estimate the PES frequency behavior under a variable power demand. The main goal of this work is to develop a DG control strategy with the aim to smooth the frequency and the voltage peak variations. To assess the different management stages the power flow exchanged between DGs and PES is depicted and discussed for different power demand variations. The results found with the DGs integration strategy confirm the frequency and voltage regulations and also prove the well power flow management.

L. Krichen

2013-01-01T23:59:59.000Z

330

Automatic Indexing from a Thesaurus Using Bayesian Networks: Application to the Classification of Parliamentary Initiatives  

Science Journals Connector (OSTI)

We propose a method which, given a document to be classified, automatically generates an ordered set of appropriate descriptors extracted from a thesaurus. The method creates a Bayesian network to model the thesaurus

Luis M. de Campos; Juan M. Fernndez-Luna

2007-01-01T23:59:59.000Z

331

Formation of attribute spaces using wavelets in automatic classification of explosives  

Science Journals Connector (OSTI)

The non-contact automatic on-line classification of explosives is a multi-aspect task. It involves choosing the method of information gathering, planning and conduction of experiments, choosing a classifier, formation of training and control samples, ... Keywords: automatic classification, explosives, piezoelectric transducer, symptoms, ultrasonic waves, wavelet transformation

Nikolai Shopov; Rajcho Ilarionov; Ivan Simeonov; Hristo Kilifarev

2008-06-01T23:59:59.000Z

332

Neat Tallow Combustion in a Large Diesel Engine for Electricity Generation from Waste  

Science Journals Connector (OSTI)

This paper explores how neat tallow can be used as a renewable fuel from waste for electricity generation in a large direct injection (DI) diesel engine capable of burning higher viscosity fuel. ... The fuel supply panel is linked with the main engine control panel, so that any alarm state of the plant (i.e., grid voltage fault, engine overheating) results in automatic change over into diesel modesystem flushing. ... Reforming Mini Reactor ...

Jakub Piaszyk; Perry Leung; Miroslaw L. Wyszynski; Athanasios Tsolakis; Barney Williams; Paul Latham; Andrew P. E. York

2012-10-15T23:59:59.000Z

333

Miscellaneous comments on boiler control tuning  

SciTech Connect

This article is about boiler control tuning, a task both difficult and important. Why is tuning of the boiler control so difficult Because it is essentially one large, interactive, non-linear control loop, which does not lend itself to automatic tuning. Why is good tuning of the boiler control so important Because it impacts boiler and turbine efficiency, unit ramp rate and generation error, unit turn-down (low load operation), and unit availability (ability to survive process upsets and equipment failures). Can you improve boiler operation through tuning alone Yes, if the practitioner of this art is competent, boiler control tuning can cover-up a multitude of sins. However, it is best to combined tuning with a new control system, appropriate control strategies, good measurements and small deadband actuators. This paper describes the basics of boiler control tuning.

Keller, G.Y. (Burns and Roe Enterprises, Oradell, NJ (United States))

1994-01-01T23:59:59.000Z

334

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,

335

Absolute frequency control of a 1560 nm (192 THz) semiconductor laser locked to a rubidium absorption line interrogated by a second harmonic generated signal  

SciTech Connect

We demonstrated second harmonic generation from a 1560 run DFB laser using a KNbO{sub 3} crystal. The 780 mm beam was used to interrogate a Rb line and lock the DFB laser frequency. We devised a setup to observe a saturated absorption profile which should be used to improve the frequency control.

Poulin, M.; Latrasse, C.; Tetu, M.; Breton, M. [Universite Laval, Ste Foy (Canada)

1994-12-31T23:59:59.000Z

336

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

337

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":""}]}

338

A Gravitational Search Algorithm (GSA) based Photo-Voltaic (PV) excitation control strategy for single phase operation of three phase wind-turbine coupled induction generator  

Science Journals Connector (OSTI)

Abstract Three phase induction generators are widely used for single phase operation in wind based micro-generation schemes to cater single phase loads due to various advantages. This paper presents an improved control methodology for self excited three phase induction generator operating in single phase mode. The excitation is controlled through an inverter with Photo-Voltaic (PV) panels providing power to the dc bus. The proposed technique enables the generator for building up voltage from low wind speeds compared to conventional three phase machines. A capacitor connected across load terminals reduces the reactive power supplied by the inverter connected across the other two phases. Gravitational search algorithm (GSA) is used to calculate the switching angles of the inverter under various load and wind speeds for minimum Total Harmonic Distortion (THD) of the generated voltage. The proposed induction generator is aimed to be conveniently used in remote and grid isolated areas as a portable source of electrical power driving single phase loads. Simulations and experiments performed on a 3-phase 1kW, 415V, 50Hz, 1440r/min induction machine validates the proposed concept.

Arunava Chatterjee; Krishna Roy; Debashis Chatterjee

2014-01-01T23:59:59.000Z

339

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

SciTech Connect

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

340

Automatic fine-tuning and wind simulation at the Offshore Technology Research Center (OTRC)  

E-Print Network (OSTI)

A method for developing an automatic fine-tuning controller for matching a specification in the frequency domain is developed for the wind simulation equipment at the Offshore Technology Research Center (OTRC). A test signal synthesis method...

Miller, Mark Alan

2012-06-07T23:59:59.000Z

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

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.

342

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

343

Graph-Theoretic Generation of Assembly Plans Part I: Correct Generation of Precedence Graphs  

E-Print Network (OSTI)

1 Graph-Theoretic Generation of Assembly Plans Part I: Correct Generation of Precedence Graphs Lehigh University Bethlehem, Pennsylvania Abstract Automatic generation and selection of assembly plans a graph-theoretic scheme for the generation of assembly plans. Our scheme involves decomposing the CSP

Wu, David

344

INFERENCE GENERATION DURING AUDITORY LANGUAGE COMPREHENSION  

E-Print Network (OSTI)

INFERENCE GENERATION DURING AUDITORY LANGUAGE COMPREHENSION David A. Swinney Lee Osterhout I. Introduction It has become nearly axiomatic (and even likely true) to hold that inference generation during the literature rife with observations that while there is little evi- dence of "automatic" generation of certain

345

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...

346

A maximum power tracking algorithm based on photovoltaic current control for matching loads to a photovoltaic generator  

Science Journals Connector (OSTI)

In this paper, a novel maximum power point tracking (MPPT) approach is studied. It is based on the photovoltaic (PV) current control. The last one...

Ben Hamed Mouna; Sbita Lassad

2012-10-01T23:59:59.000Z

347

Security, trust, and QoS in next-generation control and communication for large power systems  

Science Journals Connector (OSTI)

The present communication architecture supporting control of the electric power grid makes it difficult to use the wealth of data collected at high rates in substations, retarding their use in new applications for controlling the grid. A flexible, real-time data network would make it possible to use these data for many more control and protection applications, potentially increasing the grid's reliability and increasing its operating efficiency. Applications that could use these data include: decentralised load frequency control; closed-loop voltage control; transient and small-signal stabilisation; and special protection schemes using data gathered over a wide area. Such applications and the flexibility of the underlying communication network imply greater data sharing between utilities, leading to new performance, availability and reliability requirements. This paper examines the security, trust and Quality of Service (QoS) requirements imposed by these applications and shows how they are met by mechanisms included in the GridStat middleware framework that we are developing.

Carl H. Hauser; David E. Bakken; Ioanna Dionysiou; K. Harald Gjermundrod; Venkata S. Irava; Joel Helkey; Anjan Bose

2008-01-01T23:59:59.000Z

348

Design and architecture of automatically-generated energy- reducing coprocessors  

E-Print Network (OSTI)

High Performance Computer Architecture, pages 277288, Feb.Symposium on Computer Architecture, pages 1425. IEEEtional symposium on Computer Architecture, pages 506517,

Sampson, John Morgan

2010-01-01T23:59:59.000Z

349

Powerful Techniques for the Automatic Generation of Invariants  

E-Print Network (OSTI)

Lakhnech 2 ?? , and Hassen Saidi 1??? 1 VERIMAG, Miniparc­Zirst, Rue Lavoisier 38330 Montbonnot St@informatik.uni­kiel.de ??? Saidi@imag.fr #12; Although, this rule is sound and (relatively) complete, it provides only a partial

Graf, Susanne

350

Adaptive information filtering through automatic Boolean query generation  

E-Print Network (OSTI)

The subject of this thesis is the development and graphics. testing of a new algorithm for intelligently altering information content on the World Wide Web and in other similar domains. The approach described in this thesis is a hybrid algorithm...

Nichols, Michael Roddy

1998-01-01T23:59:59.000Z

351

Automatic generation of assumptions for modular verification of software  

E-Print Network (OSTI)

la Riva, Javier Tuya The Journal of Systems and Software Accepted 20 Nov. 2005 2006. 2.22 Lee Hee Jin

Bae, Doo-Hwan

352

Automatic Test Generation for Mutation Testing on Database Applications  

E-Print Network (OSTI)

where mutants exist in normal program code, Tuya et al. [13], [14] proposed a set of mutation operators

Xie, Tao

353

Some Studies on Automatic Generation of Structural Failure Modes  

Science Journals Connector (OSTI)

This paper is concerned with the following two subjects: (1)The depth-first and the width-first branching rules are compared for selecting probabilistically significant failure paths in a redundant structure. ...

Yoshisada Murotsu; Shaowen Shao

1991-01-01T23:59:59.000Z

354

Testing robot controllers using constraint programming and continuous integration  

Science Journals Connector (OSTI)

AbstractContext Testing complex industrial robots (CIRs) requires testing several interacting control systems. This is challenging, especially for robots performing process-intensive tasks such as painting or gluing, since their dedicated process control systems can be loosely coupled with the robots motion control. Objective Current practices for validating \\{CIRs\\} involve manual test case design and execution. To reduce testing costs and improve quality assurance, a trend is to automate the generation of test cases. Our work aims to define a cost-effective automated testing technique to validate CIR control systems in an industrial context. Method This paper reports on a methodology, developed at ABB Robotics in collaboration with SIMULA, for the fully automated testing of \\{CIRs\\} control systems. Our approach draws on continuous integration principles and well-established constraint-based testing techniques. It is based on a novel constraint-based model for automatically generating test sequences where test sequences are both generated and executed as part of a continuous integration process. Results By performing a detailed analysis of experimental results over a simplified version of our constraint model, we determine the most appropriate parameterization of the operational version of the constraint model. This version is now being deployed at ABB Roboticss CIR testing facilities and used on a permanent basis. This paper presents the empirical results obtained when automatically generating test sequences for \\{CIRs\\} at ABB Robotics. In a real industrial setting, the results show that our methodology is not only able to detect reintroduced known faults, but also to spot completely new faults. Conclusion Our empirical evaluation shows that constraint-based testing is appropriate for automatically generating test sequences for \\{CIRs\\} and can be faithfully deployed in an industrial context.

Morten Mossige; Arnaud Gotlieb; Hein Meling

2015-01-01T23:59:59.000Z

355

Diffraction analysis of rotationally symmetric optical systems using computer-generated aberration polynomials  

Science Journals Connector (OSTI)

A ray trace scheme for the automatic generation of optical aberration polynomials to arbitrary orders pioneered by T. B. Andersen is successfully applied to the diffraction analysis of...

Tam, S C; Lewis, G D W; Doric, S; Heshmaty-Manesh, D

1983-01-01T23:59:59.000Z

356

A tool-path generation strategy for wire and arc additive manufacturing  

Science Journals Connector (OSTI)

This paper presents an algorithm to automatically generate optimal tool-paths for the wire and arc additive manufacturing (WAAM) process for a large class...

Donghong Ding; Zengxi (Stephen) Pan

2014-07-01T23:59:59.000Z

357

E-Print Network 3.0 - adaptive grid generation Sample Search...  

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

of .004, the adaptive algorithm automatically generates 5 refined grids. One grid patch... and more elsewhere, would clearly be optimal. In this talk, we describe a method of...

358

Frequency Scalable Non-Linear Waveform Generator for Mixed-Simal Power-Factor-Correction IC Controller'  

E-Print Network (OSTI)

operates with a fixed switching frequency fs and variable duty ratio R, and can be analyzed using standard of a switching period, a fixed-frequency clock pulse sets the switch drive high. A signal proportionalFrequency Scalable Non-Linear Waveform Generator for Mixed-Simal Power-Factor-Correction IC

359

An improved efficiency of fuzzy sliding mode control of permanent magnet synchronous motor for wind turbine generator pumping system  

Science Journals Connector (OSTI)

This paper presents an analysis by which the dynamic performances of a permanent magnet synchronous motor (PMSM) motor is controlled through a hysteresis current loop and an outer speed loop with different contro...

F. Benchabane; A. Titaouine; O. Bennis; A. Guettaf; K. Yahia

2012-04-01T23:59:59.000Z

360

Polynomial law for controlling the generation of n-scroll chaotic attractors in an optoelectronic delayed oscillator  

E-Print Network (OSTI)

Controlled transitions between a hierarchy of n-scroll attractors are investigated in a nonlinear optoelectronic oscillator. Using the system's feedback strength as a control parameter, it is shown experimentally the transition from Van der Pol-like attractors to 6-scroll, but in general, this scheme can produce an arbitrary number of scrolls. The complexity of every state is characterized by Lyapunov exponents and autocorrelation coefficients.

Bicky A. Mrquez; Jos J. Surez-Vargas; Javier A. Ramrez

2014-08-23T23:59:59.000Z

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.


361

Employing two novel mechanical fault ride through controllers for keeping stability of fixed speed wind generation systems hosted by standalone micro-grid  

Science Journals Connector (OSTI)

Abstract This paper proposes and designs two novels Fault Ride Through (FRT) controllers for maintaining Fixed Speed Wind Generation system (FSWGs) stability during fault events. The first technique has been implemented by increasing the wind turbine blade pitch angle with maximum possible rate to reduce the mechanical extracted wind power and consequently suppress wind generation system acceleration. The second FRT technique has been verified by adapting gear ratio of wind generation system to run far from optimum maximum power point and help FRT process. Effectiveness of the two proposed FRT techniques has been proven by accurate simulation of the most severe disturbance conditions. Also, Results indicated that second technique gives faster response than the first one. Without employing any FRT technique, \\{FSWGs\\} cannot keep its stability and the standalone Micro-Grid (MG) transfers to the blackout mode. Implementation the two FRT techniques requires no additional hardware. Only, control algorithms need little modification to deal with fault event and help FRT process. This fact makes the two proposed FRT techniques are simple, practical and highly economical attractive.

Rashad M. Kamel

2014-01-01T23:59:59.000Z

362

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

363

Contaminant-Generation Mechanisms  

Science Journals Connector (OSTI)

In the last chapter, the areas where contaminants are generated were discussed. Knowing the location of contaminant generation is helpful in controlling that contamination, but understanding the mechanisms is ...

Alvin Lieberman

1992-01-01T23:59:59.000Z

364

Investigation of lane occupancy as a freeway control parameter for use during incident conditions  

E-Print Network (OSTI)

parameters were used in the automatic control of' a freeway safety warning device. Two concepts, usir g measured lane occupancy foz the detection of' freeway incidents, were developed, . The f'irst concept was ter. . . cd critical occupancy... freeway safety warning device, using critical occupancy parameters, was developed and simulated in real-time. Evaluation of the simulated operation of the device revealed. that relia'cle detection of shock waves generated by freeway incidents...

Friebele, John Duncan

1972-01-01T23:59:59.000Z

365

A preliminary user-friendly, digital console for the control room parameters supervision in old-generation Nuclear Plants  

SciTech Connect

Improvements in the awareness of a system status is an essential requirement to achieve safety in every kind of plant. In particular, in the case of Nuclear Power Plants (NPPs), a progress is crucial to enhance the Human Machine Interface (HMI) in order to optimize monitoring and analyzing processes of NPP operational states. Firstly, as old-fashioned plants are concerned, an upgrading of the whole console instrumentation is desirable in order to replace an analog visualization with a full-digital system. In this work, we present a novel instrument able to interface the control console of a nuclear reactor, developed by using CompactRio, a National Instruments embedded architecture and its dedicated programming language. This real-time industrial controller composed by a real-time processor and FPGA modules has been programmed to visualize the parameters coming from the reactor, and to storage and reproduce significant conditions anytime. This choice has been made on the basis of the FPGA properties: high reliability, determinism, true parallelism and re-configurability, achieved by a simple programming method, based on LabVIEW real-time environment. The system architecture exploits the FPGA capabilities of implementing custom timing and triggering, hardware-based analysis and co-processing, and highest performance control algorithms. Data stored during the supervisory phase can be reproduced by loading data from a measurement file, re-enacting worthwhile operations or conditions. The system has been thought to be used in three different modes, namely Log File Mode, Supervisory Mode and Simulation Mode. The proposed system can be considered as a first step to develop a more complete Decision Support System (DSS): indeed this work is part of a wider project that includes the elaboration of intelligent agents and meta-theory approaches. A synoptic has been created to monitor every kind of action on the plant through an intuitive sight. Furthermore, another important aim of this work is the possibility to have a front panel available on a web interface: CompactRio acts as a remote server and it is accessible on a dedicated LAN. This supervisory system has been tested and validated on the basis of the real control console for the 1-MW TRIGA reactor RC-1 at the ENEA, Casaccia Research Center. In this paper we show some results obtained by recording each variable as the reactor reaches its maximum level of power. The choice of a research reactor for testing the developed system relies on its training and didactic importance for the education of plant operators: in this context a digital instrument can offer a better user-friendly tool for learning and training. It is worthwhile to remark that such a system does not interfere with the console instrumentation, the latter continuing to preserve the total control. (authors)

Memmi, F.; Falconi, L.; Cappelli, M.; Palomba, M.; Santoro, E.; Bove, R.; Sepielli, M. [UTFISST, ENEA Casaccia, via Anguillarese 301, Rome (Italy)

2012-07-01T23:59:59.000Z

366

Automatic Performance Collection (AutoPerf) | Argonne Leadership...  

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

Automatic Performance Collection (AutoPerf) A beta version of a tool for the automatic collection of hardware performance counter and MPI information has been installed on Vesta...

367

Generation of Software Test Data from the Design Specification Using Heuristic Techniques. Exploring the UML State Machine Diagrams and GA Based Heuristic Techniques in the Automated Generation of Software Test Data and Test Code.  

E-Print Network (OSTI)

??Software testing is a tedious and very expensive undertaking. Automatic test data generation is, therefore, proposed in this research to help testers reduce their work (more)

Doungsa-ard, Chartchai

2011-01-01T23:59:59.000Z

368

Towards Automatically Estimating Porting Effort Between Web Service APIs Hiranya Jayathilaka, Chandra Krintz, Rich Wolski  

E-Print Network (OSTI)

Towards Automatically Estimating Porting Effort Between Web Service APIs Hiranya Jayathilaka for a programmer to port an application from one web API to another, i.e. "porting effort". Our approach defines approach using both randomly generated and real-world web APIs and show that our metric can correctly

Bigelow, Stephen

369

Automatic Information Discovery from the "Invisible Web" King-Ip Lin, Hui Chen  

E-Print Network (OSTI)

that is untouched by the traditional search engines. Known as the "invisible web" or "deep web", it representsAutomatic Information Discovery from the "Invisible Web" King-Ip Lin, Hui Chen Division of Computer@memphis.edu Abstract A large amount of on-line information resides on the invisible web ­ web pages generated

Lin, King-Ip "David"

370

Active Power Controls from Wind Power: Bridging the Gaps  

SciTech Connect

This paper details a comprehensive study undertaken by the National Renewable Energy Laboratory, Electric Power Research Institute, and the University of Colorado to understand how the contribution of wind power providing active power control (APC) can benefit the total power system economics, increase revenue streams, improve the reliability and security of the power system, and provide superior and efficient response while reducing any structural and loading impacts that may reduce the life of the wind turbine or its components. The study includes power system simulations, control simulations, and actual field tests using turbines at NREL's National Wind Technology Center (NWTC). The study focuses on synthetic inertial control, primary frequency control, and automatic generation control, and analyzes timeframes ranging from milliseconds to minutes to the lifetime of wind turbines, locational scope ranging from components of turbines to large wind plants to entire synchronous interconnections, and additional topics ranging from economics to power system engineering to control design.

Ela, E.; Gevorgian, V.; Fleming, P.; Zhang, Y. C.; Singh, M.; Muljadi, E.; Scholbrook, A.; Aho, J.; Buckspan, A.; Pao, L.; Singhvi, V.; Tuohy, A.; Pourbeik, P.; Brooks, D.; Bhatt, N.

2014-01-01T23:59:59.000Z

371

H2-optimal Anti-Windup Performance in SISO Control Systems Stefan RonnbackA and Mikael SternadS  

E-Print Network (OSTI)

D thesis, Division of Automatic Control, Lulea University of Technology, Sweden, 1993. 2] M. Sternad and S

372

Automatic Calibration of a Building Energy Simulation Model Using a Global Optimization Program  

E-Print Network (OSTI)

optimization process minimizing the error between measured and simulated energy consumption. The ?measured? data used in this case was generated by the simulation program and will be referred to as synthetic measured data. The accuracy of calibration...). It is used to prove the possibility of automatic calibration through an optimization process. Synthetic ?data? was generated by the simulation program. This synthetic measured heating and cooling energy consumption data for the prototype building...

Lee, S. U.; Claridge, D.

2002-01-01T23:59:59.000Z

373

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

374

Automatic tuning of continuous-time filters  

E-Print Network (OSTI)

Integrated high-Q continuous-time filters require adaptive tuning circuits that will correct the filter parameters such as center frequency and quality factor (Q). Three different automatic tuning techniques are introduced. In all of the proposed...

Sumesaglam, Taner

2004-11-15T23:59:59.000Z

375

Automatic program timing profiles with FTN4  

SciTech Connect

Design of a scheme for producing execution timing profiles of FORTRAN programs automatically is proposed with a recommendation to implement it as an option to the compiler. An experimental implementation on the LBL 7600 is also described. 1 figure.

Friedman, R.

1980-09-01T23:59:59.000Z

376

Automatic Program Translation " A Third Way  

Science Journals Connector (OSTI)

Translation between data formats, between multimedia mark-up languages, between modelling languages and between programming languages are classic problems in computer science and software engineering. There are two traditional approaches to automatic ...

David P. Clark; Min Chen; John V. Tucker

2004-12-01T23:59:59.000Z

377

The Challenge of an Automatic Mssbauer Analysis  

Science Journals Connector (OSTI)

The present paper reports on our efforts to obtain an intelligent and automatic Mssbauer analysis. For this propose, a program was implemented capable to analyse and fit a Mssbauer spectrum, identify the sub...

Paulo A. de Souza Jr.; Vijayendra K. Garg

1999-01-01T23:59:59.000Z

378

Feature selection for automatic solder joint inspection  

E-Print Network (OSTI)

FEATURE SELECTION FOR AUTOMATIC SOLDER JOINT INSPECTION A Thesis CHENG-CHENG LEE Submitted to the Graduate College of Texas AiVM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1987 Major... Subject: Mechanical Engineering FEATURE SELECTION FOR AUTOMATIC SOLDER JOINT INSPECTION A Thesis by CHENG-CHENG LEE Approved as to style and content by: Morris Driels (Chairman of Committee) Norman Gris ld (Member) i(?? Oren Xlasor'i (kfembef...

Lee, Cheng-Cheng

2012-06-07T23:59:59.000Z

379

Lazy Generation of Building Interiors in Realtime Carleton University  

E-Print Network (OSTI)

Lazy Generation of Building Interiors in Realtime Evan Hahn Carleton University e-mail: ehahn interiors for the player to ex- plore. Automatic real-time building interior generation can provide a means of entry through every visible door in a virtual world. We present a novel approach to generate virtual

Whitehead, Anthony

380

ATOM: Automatic transformer oil monitor status report to EPRI  

SciTech Connect

This report addresses Phase II design, development, and installation activities of the R&D project to develop of the {open_quotes}Automatic Transformer Oil Monitor, ATOM{open_quotes}. The project is jointly undertaken by Advanced Optical Controls, Inc. (AOC) and Consolidated Edison Company of New York, Inc. The purpose of this paper is to keep other utilities appraised as to the progress of ATOM and encourage dialogue among potential users regarding desired product features as the production design stage for ATOM approaches.

Slemon, C.S.; Diamond, A.E.; Chu, D. [and others

1996-03-01T23:59:59.000Z

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

Diophantine Generation,  

E-Print Network (OSTI)

Diophantine Generation, Horizontal and Vertical Problems, and the Weak Vertical Method Alexandra Shlapentokh Diophantine Sets, Definitions and Generation Diophantine Sets Diophantine Generation Properties of Diophantine Generation Diophantine Family of Z Diophantine Family of a Polynomial Ring Going Down Horizontal

Shlapentokh, Alexandra

382

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.

383

ARE660 Wind Generator: Low Wind Speed Technology for Small Turbine Development  

SciTech Connect

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 Energys (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

384

Image Analysis for AutomaticImage Analysis for Automatic PhenotypingPhenotyping MeasurementsMeasurements  

E-Print Network (OSTI)

Image Analysis for AutomaticImage Analysis for Automatic PhenotypingPhenotyping MeasurementsMeasurements (BioSS) WageningenWageningen, 8 March 2012, 8 March 2012 #12;Measurements · How many are there? · How "large" are they? · How "similar" are they? #12;Measurements · How many are there? · How "large" are they

Glasbey, Chris

385

Electrical Machinery and Control Diagrams  

Science Journals Connector (OSTI)

... complexity, beginning with the simple manually controlled starting rheostat and going on to the automatic substation. To the practical engineer they will be helpful. We hope that in the second ...

1925-03-28T23:59:59.000Z

386

Optimal Voltage Control of the Southern Norwegian Power Grid.  

E-Print Network (OSTI)

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

Hannisdal, Erik Lundegaard

2011-01-01T23:59:59.000Z

387

Smart Frequency-Sensing Charge Controller for Electric Vehicles...  

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

licensing:System uses frequency-sensing charge controllers that provide automatic demand response and regulation service to the grid by reducing or turning the charging load...

388

Generating natural language summaries for multimedia  

Science Journals Connector (OSTI)

In this paper we introduce an automatic system that generates textual summaries of Internet-style video clips by first identifying suitable high-level descriptive features that have been detected in the video (e.g. visual concepts, recognized speech, ...

Duo Ding; Florian Metze; Shourabh Rawat; Peter F. Schulam; Susanne Burger

2012-05-01T23:59:59.000Z

389

Audio Morphing for Percussive Hybrid Sound Generation  

E-Print Network (OSTI)

Audio Morphing for Percussive Hybrid Sound Generation Andrea Primavera1, Francesco Piazza1 should be addressed to Andrea Primavera (a.primavera@univpm.it) ABSTRACT The aim of audio morphing to obtain more realistic and perceptually relevant sounds. In this paper we present an automatic audio

Reiss, Josh

390

Optimization Algorithm for the Generation of ONCV Pseudopotentials  

E-Print Network (OSTI)

We present an optimization algorithm to construct pseudopotentials and use it to generate a set of Optimized Norm-Conserving Vanderbilt (ONCV) pseudopotentials for elements up to Z=83 (Bi) (excluding Lanthanides). We introduce a quality function that assesses the agreement of a pseudopotential calculation with all-electron FLAPW results, and the necessary plane-wave energy cutoff. This quality function allows us to use a Nelder-Mead optimization algorithm on a training set of materials to optimize the input parameters of the pseudopotential construction for most of the periodic table. We control the accuracy of the resulting pseudopotentials on a test set of materials independent of the training set. We find that the automatically constructed pseudopotentials provide a good agreement with the all-electron results obtained using the FLEUR code with a plane-wave energy cutoff of approximately 60 Ry.

Schlipf, Martin

2015-01-01T23:59:59.000Z

391

1. Generation 1 1. Generation  

E-Print Network (OSTI)

1. Generation 1 _________________________________________________________________________ 1. Generation Sound and vibrations or, in more general terms, oscillations of matter (solids or fluids) are generated in many different dynamic processes. The basic mechanisms which underlie these oscillations

Berlin,Technische Universität

392

Automatic Fish Classification for Underwater Species Behavior Understanding  

E-Print Network (OSTI)

Automatic Fish Classification for Underwater Species Behavior Understanding Concetto Spampinato an automatic fish classi- fication system that operates in the natural underwater en- vironment to assist marine biologists in understanding fish behavior. Fish classification is performed by combining two types

Fisher, Bob

393

Automatic Red Eye Removal for Digital Photography  

E-Print Network (OSTI)

Chapter 1 Automatic Red Eye Removal for Digital Photography FRANCESCA GASPARINI DISCo, Dipartimento The red eye effect is a well known problem in photography. It is often seen in amateur shots taken with a built-in flash, but the problem is also well known to professional photographers. Red eye is the red

Schettini, Raimondo

394

Automatic Video Shot Detection from MPEG Stream  

E-Print Network (OSTI)

Automatic Video Shot Detection from MPEG Stream Jianping Fan Department of Computer Science;Why we need video shots? a. Text Retrieval: Keyword Extraction Indexing Document Storage Reverse File Indexing #12;Why we need video shots? b. Database Query: Entity Extraction sid name login age gpa 53666

Fan, Jianping

395

Automatic TLI recognition system, general description  

SciTech Connect

This report is a general description of an automatic target recognition system developed at the Idaho National Engineering Laboratory for the Department of Energy. A user`s manual is a separate volume, Automatic TLI Recognition System, User`s Guide, and a programmer`s manual is Automatic TLI Recognition System, Programmer`s Guide. This system was designed as an automatic target recognition system for fast screening of large amounts of multi-sensor image data, based on low-cost parallel processors. This system naturally incorporates image data fusion, and it gives uncertainty estimates. It is relatively low cost, compact, and transportable. The software is easily enhanced to expand the system`s capabilities, and the hardware is easily expandable to increase the system`s speed. In addition to its primary function as a trainable target recognition system, this is also a versatile, general-purpose tool for image manipulation and analysis, which can be either keyboard-driven or script-driven. This report includes descriptions of three variants of the computer hardware, a description of the mathematical basis if the training process, and a description with examples of the system capabilities.

Lassahn, G.D.

1997-02-01T23:59:59.000Z

396

Automatic Alignment of Genus-Zero Surfaces  

Science Journals Connector (OSTI)

A new algorithm is presented that provides a constructive way to conformally warp a triangular mesh of genus zero to a destination surface with minimal metric deformation, as well as a means to compute automatically a measure of the geometric difference ... Keywords: Conformal mapping, mesh warping, Mbius transformation, nonrigid registration

Patrice Koehl; Joel Hass

2014-03-01T23:59:59.000Z

397

Automatic video tagging using content redundancy  

Science Journals Connector (OSTI)

The analysis of the leading social video sharing platform YouTube reveals a high amount of redundancy, in the form of videos with overlapping or duplicated content. In this paper, we show that this redundancy can provide useful information about connections ... Keywords: automatic tagging, content-based links, data organization, neighbor-based tagging, tag propagation, video duplicates

Stefan Siersdorfer; Jose San Pedro; Mark Sanderson

2009-07-01T23:59:59.000Z

398

Development of an automatic heliostat cleaning system. Final technical report  

SciTech Connect

An automatic washing system was designed consisting of a water treatment system, a pressurized underground water distribution system, an automatic spray washing module for each heliostat, a water collection system, and appropriate controls to operate this equipment. In order to determine the required values for the various washing parameters, a series of washing tests was undertaken in which mirrors were soiled and then cleaned by a high pressure water spray. Reflectivity was measured for the clean, soiled and washed conditions to determine the effectiveness of the cleaning. A heliostat spray module was constructed and operated mainly to obtain information on the mechanical operation of one concept. This testing showed that this system was generally satisfactory, but did show some areas for improvement. Water distribution and waste water systems were designed and evaluated with the main conclusion that conventional waste water collection is complex and the most expensive part of the system. The total system is shown to be cost effective if site meteorological conditions do not supply a large number of cycles of natural cleaning occurrences. Continued development of this concept by constructing a small scale washing system within an existing heliostat field is recommended.

Tremblay, P.; Poulin, E.

1980-12-01T23:59:59.000Z

399

Toward optimized code generation through model-based optimization  

E-Print Network (OSTI)

Toward optimized code generation through model- based optimization Asma Charfi, Chokri Mraidha with in RTES development is linked to the optimization of their software part. Although automatic code generation and the use of optimizing compilers bring some answers to application optimization issue, we

Paris-Sud XI, Université de

400

An automatic cutting height control system for a sugarcane harvester  

E-Print Network (OSTI)

). . . . . 53 22. 23. Effect of the soil-stalk weight factor on the ground average, and the stalk average A comparison of Avg and Avs calculated from laboratory data with both real numbers, and integer numbers. . . . . . . 57 24 . A graph of a portion... factor, W. By calculating the difference between Avg and Avs, as equation (5) shows, the height of the sugarcane stubble remaining after cutting, 0, was to be determined. D = Avg - Avs (5) where: D - the height of the sugarcane stubble remaining...

Hale, Scott Andrew

2012-06-07T23:59:59.000Z

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.


401

Dynamical formulations and control of an automatic retargeting system  

E-Print Network (OSTI)

........................... 39 B.Example2........................... 40 C.Example3........................... 41 viii CHAPTER Page D.Conclusion........................... 42 IX TARGET IDENTIFICATION ................... 44 A.TwoMirrorSystem...................... 44 B.DeterminationofMirror... to front of the cameras. It is impractical to physically move the camera and its large lens system in a pan and tilt motion. However, a mirror system can be used to alleviate this problem. Two mirrors will be used to redirected the beam where commanded...

Sovinsky, Michael Charles

2007-04-25T23:59:59.000Z

402

An automatic control system for a laboratory precipitation process  

E-Print Network (OSTI)

) 200 mg/1 (from CaC12) 2000 mg/1 (from Na2504) 150 mg/1 (from Na25105~9H20) 5000 mg/1 (additional TDS from NaC1) 50 mg/1 as CaCOS (from NaHCOS) 1025 mg/1 25 at the top for the pH probe and the lime feed tubing. The time interval of the flow...

Burnett, Mary Alice

2012-06-07T23:59:59.000Z

403

Unbalanced-grid-fault ride-through control for a doubly fed induction generator wind turbine with series grid-side converter  

Science Journals Connector (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

404

Safety implementation of adaptive embedded control components  

Science Journals Connector (OSTI)

The paper deals with dynamic reconfigurations of component-based adaptive embedded control systems to be automatically handled at run-time by intelligent agents. We define a Control Component as a software unit supporting control tasks of the system ... Keywords: adaptive embedded control system, dynamic reconfiguration, intelligent agent, semaphore, software control component

Atef Gharbi; Mohamed Khalgui; Samir Ben Ahmed

2011-09-01T23:59:59.000Z

405

Automatic parallelization of simulation code for equation-based models with software pipelining and measurements on three platforms  

Science Journals Connector (OSTI)

In this work we report results from a new integrated method of automatically generating parallel code from Modelica models by combining parallelization at two levels of abstraction. Performing inline expansion of a Runge-Kutta solver combined with fine-grained ...

Hkan Lundvall; Kristian Stavker; Peter Fritzson; Christoph Kessler

2009-06-01T23:59:59.000Z

406

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

407

Automatic synthesis of quantum circuits for point addition on ordinary binary elliptic curves  

E-Print Network (OSTI)

Implementing the group arithmetic is a cost-critical task when designing quantum circuits for Shor's algorithm to solve the discrete logarithm problem. We introduce a tool for the automatic generation of addition circuits for ordinary binary elliptic curves, a prominent platform group for digital signatures. Our Python software generates circuit descriptions that, without increasing the number of qubits or T-depth, involve less than 39% of the number of T-gates in the best previous construction. The software also optimizes the (CNOT) depth for GF(2)-linear operations by means of suitable graph colorings.

Parshuram Budhathoki; Rainer Steinwandt

2014-01-10T23:59:59.000Z

408

Generation Planning (pbl/generation)  

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

Generation Hydro Power Wind Power Monthly GSP BPA White Book Dry Year Tools Firstgov Generation Planning Thumbnail image of BPA White Book BPA White Book (1998 - 2011) Draft Dry...

409

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

410

AVESTAR® - Control  

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

Control Control AVESTAR control system efforts are focused on development of computational approaches for simulation and advanced controls for energy systems. Power generation technologies are growing more sophisticated and require control strategies and systems to be updated to allow plant owners to take full advantage of their increased capabilities. A well designed control system can provide the ability to hit and maintain setpoints without oscillation for optimum power plant operation. Implementation of complex control systems developed through advanced computational approaches will increase efficiency and reduce emissions. The AVESTAR team is focusing on the following three areas of process control research: 1) Plant-wide control system design, 2) Advanced regulatory control, and 3) Advanced process control. Process control models, methods, and tools are developed and applied to a wide variety of energy systems ranging from smart plant to smart grid.

411

Automatic high-fidelity 3D road network modeling based on 2D GIS data  

Science Journals Connector (OSTI)

Abstract Many computer applications such as racing games and driving simulations demand high-fidelity 3D road network models. However, few methods exist for the automatic generation of 3D realistic road networks, especially for those in the real world. On the other hand, vast 2D road network data in various geographical information systems (GIS) have been collected in the past and are used by a wide range of applications. A method that can automatically produce 3D high-fidelity road network models from 2D real road GIS data will significantly reduce both the labor and time cost, and greatly benefit applications involving road networks. Based on a set of carefully selected civil engineering rules for road design, this paper proposes a novel approach that transforms existing road GIS data that contain only 2D road centerline information into high-fidelity 3D road network models. The proposed method consists of several major components, including road GIS data preprocessing, 3D centerline modeling, and 3D geometric modeling. With this approach, basic road elements such as road segments, road intersections and traffic interchanges are generated automatically to compose sophisticated road networks in a seamless manner. Results show that this approach provides a rapid and efficient 3D road modeling method for applications that have stringent requirements on high-fidelity road models.

Jie Wang; Gary Lawson; Yuzhong Shen

2014-01-01T23:59:59.000Z

412

Control design of Santo Tome back-to-back HVDC link  

SciTech Connect

This paper describes the control design of the Santo tome' back-to-back HVDC link. The Santo Tome' HVDC converter will be the second dc link asynchronously connecting the Argentina and Brazil power systems. This paper focuses on the design of the reactive power control, automatic power control, load frequency control, power modulation control, automatic frequency control, and automatic synchronizing control functions of the 50 MW dc link. Time simulation and frequency domain results are included to illustrate the system response and verify the adequacy of the controllers performance in achieving stable operating conditions.

Rostamkolai, N.; Wegner, C.A.; Piwko, R.J.; Elahi, H.; Eitzmann, M.A. (GE Industrial and Power Systems, Schenectady, NY (United States)); Garzi, G.; Tietz, P. (Ansaldo Industria, Genova (Italy))

1993-08-01T23:59:59.000Z

413

ORC Closed Loop Control Systems for Transient and Steady State Duty Cycles  

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

System-level models using iterative concept analysis are being used on a closed loop controlled, waste heat recovery system running automatically over various drive cycles.

414

Quantum-path control and isolated-attosecond-pulse generation using H2+ molecules with moving nuclei in few-cycle laser pulses  

Science Journals Connector (OSTI)

We theoretically investigate the high-order harmonic generation (HHG) and isolated-attosecond-pulse generation from a full one-dimensional (1D) model of H2+ molecule in 3-fs, 800-nm laser pulses by using numerical solutions of the non-Born-Oppenheimer time-dependent Schrdinger equation (TDSE). The numerical results with moving nuclei and the static nuclei are demonstrated. The harmonic spectrum from the 22nd to the cutoff becomes smooth and fewer modulations and an isolated-attosecond pulse with duration 129 as is generated when we consider the nuclear motion. We investigate the emission time of harmonics in terms of the time-frequency analysis, which shows that, with moving nuclei, the long trajectory is suppressed, and the short trajectories is enhanced. We apply the nuclear and electronic probability density and the simulation of classical electron trajectory to illustrate the physical mechanism of HHG.

Xin-Lei Ge; Tian Wang; Jing Guo; Xue-Shen Liu

2014-02-20T23:59:59.000Z

415

Automatic TLI recognition system, programmer`s guide  

SciTech Connect

This report describes the software of an automatic target recognition system (version 14), from a programmer`s point of view. The intent is to provide information that will help people who wish to modify the software. In separate volumes are a general description of the ATR system, Automatic TLI Recognition System, General Description, and a user`s manual, Automatic TLI Recognition System, User`s Guide. 2 refs.

Lassahn, G.D.

1997-02-01T23:59:59.000Z

416

Control System For Cryogenic THD Layering At The National Ignition Facility  

SciTech Connect

The National Ignition Facility (NIF) is the world largest and most energetic laser system for Inertial Confinement Fusion (ICF). In 2010, NIF began ignition experiments using cryogenically cooled targets containing layers of the tritium-hydrogen-deuterium (THD) fuel. The 75 {micro}m thick layer is formed inside of the 2 mm target capsule at temperatures of approximately 18 K. The ICF target designs require sub-micron smoothness of the THD ice layers. Formation of such layers is still an active research area, requiring a flexible control system capable of executing the evolving layering protocols. This task is performed by the Cryogenic Target Subsystem (CTS) of the NIF Integrated Computer Control System (ICCS). The CTS provides cryogenic temperature control with the 1 mK resolution required for beta-layering and for the thermal gradient fill of the capsule. The CTS also includes a 3-axis x-ray radiography engine for phase contrast imaging of the ice layers inside of the plastic and beryllium capsules. In addition to automatic control engines, CTS is integrated with the Matlab interactive programming environment to allow flexibility in experimental layering protocols. The CTS Layering Matlab Toolbox provides the tools for layer image analysis, system characterization and cryogenic control. The CTS Layering Report tool generates qualification metrics of the layers, such as concentricity of the layer and roughness of the growth boundary grooves. The CTS activities are automatically coordinated with other NIF controls in the carefully orchestrated NIF Shot Sequence.

Fedorov, M; Blubaugh, J; Edwards, O; Mauvais, M; Sanchez, R; Wilson, B

2011-03-18T23:59:59.000Z

417

IMAGE-BASED VISUAL SERVOING FOR VANISHING FEATURES AND GROUND LINES TRACKING: APPLICATION TO A UAV AUTOMATIC LANDING  

E-Print Network (OSTI)

IMAGE-BASED VISUAL SERVOING FOR VANISHING FEATURES AND GROUND LINES TRACKING: APPLICATION TO A UAV the feasibility of a vision-based guidance for a UAV model during survey missions and for automatic landing aerial vehicle (UAV), auto-landing, dynamic modeling, robust control Corresponding author. Email: Patrick

Paris-Sud XI, Université de

418

Fig. 1. Screenshot of gameplay for a generated mini-game in the Variations Forever prototype. The player controls the white character  

E-Print Network (OSTI)

) which drifts on its own. Abstract--Variations Forever is a novel game in which the player explores a vast, pro- cedurally generated galaxy reminiscent of the seminal PCG work seen in Elite (Acornsoft 1984 design into four domains: abstract game mechanics (abstract game state and how this state evolves over

California at Santa Cruz, University of

419

Fact #850: December 8, 2014 Automatic Transmissions have closed...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Note: Fuel economy average is the production-weighted harmonic mean. Fact 850 Dataset Supporting Information Comparison of Manual and Automatic Transmission Fuel Economy...

420

Low Level Descriptors for Automatic Violin Transcription Alex Loscos  

E-Print Network (OSTI)

Low Level Descriptors for Automatic Violin Transcription Alex Loscos MTG at Universitat Pompeu additional processing. 3. Pitch Analysis Previous system [5] already confronted the problem of octave errors

Wang, Ye

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

Direct Digital Control- A Tool for Energy Management of HVAC Systems  

E-Print Network (OSTI)

Direct digital control (DDC) applied to heating, ventilating, and air-conditioning (HVAC) systems corrects many of the deficiencies of conventional automatic temperature control systems. By applying new control sequences, DDC optimizes HVAC energy...

Swanson, K.

422

AUTOMATIC PROGRAM TIMING PROFILES WITH FTN4  

E-Print Network (OSTI)

SECTION Presented at the VIM-33/ECODU-30 Control Data Userof California Presented at the VIM-33/ECODU- 30 CONTROL DATA

Friedman, Richard.

2010-01-01T23:59:59.000Z

423

Thermoelectric Generators 1. Thermoelectric generator  

E-Print Network (OSTI)

. Cold Hot I - -- - - - - -- Figure 1 Electron concentration in a thermoelectric material. #12;2 A large1 Thermoelectric Generators HoSung Lee 1. Thermoelectric generator 1.1 Basic Equations In 1821 on the direction of current and material [3]. This is called the Thomson effect (or Thomson heat). These three

Lee, Ho Sung

424

Fuel cell generator  

DOE Patents (OSTI)

High temperature solid oxide electrolyte fuel cell generators which allow controlled leakage among plural chambers in a sealed housing. Depleted oxidant and fuel are directly reacted in one chamber to combust remaining fuel and preheat incoming reactants. The cells are preferably electrically arranged in a series-parallel configuration.

Isenberg, Arnold O. (Forest Hills, PA)

1983-01-01T23:59:59.000Z

425

Quasiseparable Generators  

Science Journals Connector (OSTI)

It is clear from the preceding chapter that any matrix has quasiseparable representations. By padding given quasiseparable generators with zero matrices of large sizes one ... large orders. However, one is lookin...

Yuli Eidelman; Israel Gohberg

2014-01-01T23:59:59.000Z

426

Fully-automatic laser welding and micro-sculpting with universal in situ inline coherent imaging  

E-Print Network (OSTI)

Though new affordable high power laser technologies make possible many processing applications in science and industry, depth control remains a serious technical challenge. Here we show that inline coherent imaging, with line rates up to 312 kHz and microsecond-duration capture times, is capable of directly measuring laser penetration depth in a process as violent as kW-class keyhole welding. We exploit ICI's high speed, high dynamic range and robustness to interference from other optical sources to achieve fully automatic, adaptive control of laser welding as well as ablation, achieving micron-scale sculpting in vastly different heterogeneous biological materials.

Webster, Paul J L; Ji, Yang; Galbraith, Christopher M; Kinross, Alison W; Van Vlack, Cole; Fraser, James M

2014-01-01T23:59:59.000Z

427

Automatic fault detection on BIPV systems without solar irradiation data  

E-Print Network (OSTI)

BIPV systems are small PV generation units spread out over the territory, and whose characteristics are very diverse. This makes difficult a cost-effective procedure for monitoring, fault detection, performance analyses, operation and maintenance. As a result, many problems affecting BIPV systems go undetected. In order to carry out effective automatic fault detection procedures, we need a performance indicator that is reliable and that can be applied on many PV systems at a very low cost. The existing approaches for analyzing the performance of PV systems are often based on the Performance Ratio (PR), whose accuracy depends on good solar irradiation data, which in turn can be very difficult to obtain or cost-prohibitive for the BIPV owner. We present an alternative fault detection procedure based on a performance indicator that can be constructed on the sole basis of the energy production data measured at the BIPV systems. This procedure does not require the input of operating conditions data, such as solar ...

Leloux, Jonathan; Luna, Alberto; Desportes, Adrien

2014-01-01T23:59:59.000Z

428

Towards Fully Automatic Placement of Security Sanitizers and Declassifiers  

E-Print Network (OSTI)

in this space has focused on finding missing sanitizers and was performed on relatively small ap- plicationsTowards Fully Automatic Placement of Security Sanitizers and Declassifiers Benjamin Livshits Fully Automatic Placement of Security Sanitizers and Declassifiers Benjamin Livshits Microsoft Research

Livshits, Ben

429

TR-IIS-07-002 Automatic Derivation of  

E-Print Network (OSTI)

TR-IIS-07-002 Automatic Derivation of Compositional Rules in Automated Compositional Reasoning Bow-Yaw://www.iis.sinica.edu.tw/LIB/TechReport/tr2007/tr07.html #12;AUTOMATIC DERIVATION OF COMPOSITIONAL RULES IN AUTOMATED COMPOSITIONAL REASONING BOW-YAW algorithm. Consider, for example, the following assume-guarantee rule where M |= P denotes that the system M

Chen, Sheng-Wei

430

Semi-Automatic Image Annotation Using Event and Torso Identification  

E-Print Network (OSTI)

Semi-Automatic Image Annotation Using Event and Torso Identification Bongwon Suh, Benjamin B. Bulk annotation, where multiple images are annotated at once, is a desired feature for image management for automatically creating meaningful image clusters for efficient bulk annotation. These techniques are not perfect

Golbeck, Jennifer

431

Improving API Usage through Automatic Detection of Redundant Code  

E-Print Network (OSTI)

Improving API Usage through Automatic Detection of Redundant Code David Kawrykow and Martin P Programming Interfaces (APIs). We have observed many cases where APIs are used in ways that are not the most effective. We developed a technique and tool support to automatically detect such patterns of API usage

Robillard, Martin

432

IPSJ SIG Technical Report Automatic parallelization with OSCAR API Analyzer  

E-Print Network (OSTI)

IPSJ SIG Technical Report Automatic parallelization with OSCAR API Analyzer: a cross have devel- oped the OSCAR API Analyzer. It allows programs automatically parallelized by the OSCAR compiler with OSCAR API directives to target many different platforms using just sequential compilers. We

Kasahara, Hironori

433

Automatic Fracture Reduction Thomas Albrecht and Thomas Vetter  

E-Print Network (OSTI)

Automatic Fracture Reduction Thomas Albrecht and Thomas Vetter University of Basel Abstract. We segmented from CT scans. The result of this virtual fracture reduction is intended to be used an operation plan. We propose to achieve automatic fracture reduction by fitting the bone fragments

Vetter, Thomas

434

Calibrated vapor generator source  

DOE Patents (OSTI)

A portable vapor generator is disclosed that can provide a controlled source of chemical vapors, such as, narcotic or explosive vapors. This source can be used to test and calibrate various types of vapor detection systems by providing a known amount of vapors to the system. The vapor generator is calibrated using a reference ion mobility spectrometer. A method of providing this vapor is described, as follows: explosive or narcotic is deposited on quartz wool, placed in a chamber that can be heated or cooled (depending on the vapor pressure of the material) to control the concentration of vapors in the reservoir. A controlled flow of air is pulsed over the quartz wool releasing a preset quantity of vapors at the outlet. 10 figs.

Davies, J.P.; Larson, R.A.; Goodrich, L.D.; Hall, H.J.; Stoddard, B.D.; Davis, S.G.; Kaser, T.G.; Conrad, F.J.

1995-09-26T23:59:59.000Z

435

Wind power generating system  

SciTech Connect

Normally feathered propeller blades of a wind power generating system unfeather in response to the actuation of a power cylinder that responds to actuating signals. Once operational, the propellers generate power over a large range of wind velocities. A maximum power generation design point signals a feather response of the propellers so that once the design point is reached no increase in power results, but the system still generates power. At wind speeds below this maximum point, propeller speed and power output optimize to preset values. The propellers drive a positive displacement pump that in turn drives a positive displacement motor of the swash plate type. The displacement of the motor varies depending on the load on the system, with increasing displacement resulting in increasing propeller speeds, and the converse. In the event of dangerous but not clandestine problems developing in the system, a control circuit dumps hydraulic pressure from the unfeathering cylinder resulting in a predetermined, lower operating pressure produced by the pump. In the event that a problem of potentially cladestine consequence arises, the propeller unfeathering cylinder immediately unloads. Upon startup, a bypass around the motor is blocked, applying a pressure across the motor. The motor drives the generator until the generator reaches a predetermined speed whereupon the generator is placed in circuit with a utility grid and permitted to motor up to synchronous speed.

Schachle, Ch.; Schachle, E. C.; Schachle, J. R.; Schachle, P. J.

1985-03-12T23:59:59.000Z

436

Automatic identification of abstract online groups  

DOE Patents (OSTI)

Online abstract groups, in which members aren't explicitly connected, can be automatically identified by computer-implemented methods. The methods involve harvesting records from social media and extracting content-based and structure-based features from each record. Each record includes a social-media posting and is associated with one or more entities. Each feature is stored on a data storage device and includes a computer-readable representation of an attribute of one or more records. The methods further involve grouping records into record groups according to the features of each record. Further still the methods involve calculating an n-dimensional surface representing each record group and defining an outlier as a record having feature-based distances measured from every n-dimensional surface that exceed a threshold value. Each of the n-dimensional surfaces is described by a footprint that characterizes the respective record group as an online abstract group.

Engel, David W; Gregory, Michelle L; Bell, Eric B; Cowell, Andrew J; Piatt, Andrew W

2014-04-15T23:59:59.000Z

437

Operational Control of Electricity Supply Systems  

Science Journals Connector (OSTI)

... to develop, the common-diagram control system, which enables an almost unlimited number of substations, etc., to be controlled completely from one diagram and control panel, and is ... of an undertaking. It describes a wall-type system diagram which automatically indicates, which substations have changed conditions, and therefore the area involved in any disturbance. The system diagram ...

1945-09-22T23:59:59.000Z

438

Microwave generator  

DOE Patents (OSTI)

A microwave generator is provided for generating microwaves substantially from virtual cathode oscillation. Electrons are emitted from a cathode and accelerated to an anode which is spaced apart from the cathode. The anode has an annular slit there through effective to form the virtual cathode. The anode is at least one range thickness relative to electrons reflecting from the virtual cathode. A magnet is provided to produce an optimum magnetic field having the field strength effective to form an annular beam from the emitted electrons in substantial alignment with the annular anode slit. The magnetic field, however, does permit the reflected electrons to axially diverge from the annular beam. The reflected electrons are absorbed by the anode in returning to the real cathode, such that substantially no reflexing electrons occur. The resulting microwaves are produced with a single dominant mode and are substantially monochromatic relative to conventional virtual cathode microwave generators. 6 figs.

Kwan, T.J.T.; Snell, C.M.

1987-03-31T23:59:59.000Z

439

Redundant marine engine control system  

SciTech Connect

An electro-mechanical engine control system is described for the shift and throttle functions of marine engines which comprises an electronically-controlled mechanical servo control means coupleable to the shift and throttle functions of a marine engine; a manually-operable ship-board operator engine shift and throttle control means; and an electro-mechanical transfer means coupled to the operator control means and to the servo control means for transferring operator shift and throttle settings to the servo control means, the transfer means being both electronically and mechanically coupled to the servo control means and being constructed and arranged whereby the transfer means will mechanically actuate the servo control means in the absence of electrical power and will electronically actuate the servo control means when electrical power is applied to the servo control means; the transfer means including coupling means preferentially electrically-coupling the operator control means to the servo control means, the coupling means being so constructed and arranged to automatically mechanically-couple the operator control means to the servo control means in the event of electrical power failure and to automatically electrically-couple the operator control means to the servo control means when electrical power is restored.

Burkenpas, R.W.

1993-06-29T23:59:59.000Z

440

E-Print Network 3.0 - automatic image processing Sample Search...  

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

images are added... by the image retrieval systems. We designed an automatic experimental process to test our proposed strategy... Semi-Automatic ... Source: Dumais, Susan -...

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

E-Print Network 3.0 - automatic spatially-adaptive balancing...  

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

balancing Page: << < 1 2 3 4 5 > >> 1 Automatic Spatially-Adaptive Balancing of Energy Terms for Image Segmentation Summary: Automatic Spatially-Adaptive Balancing of Energy Terms...

442

E-Print Network 3.0 - automatic identification system Sample...  

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

Automatic2 Fingerprint Identification System (AFIS) in the 1960s. The use... -Finger Penetration Rate and ROC Variability for Automatic Fingerprint Identification Systems", in...

443

E-Print Network 3.0 - automatic audio-conference service Sample...  

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

51 A Design of Web Service for Digital Photogrammetry Workstation using Service Oriented Architecture Summary: . Either an automatic way or semi-automatic ways, the semantics...

444

E-Print Network 3.0 - automatic survey meter Sample Search Results  

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

management services such as fine grained pricing schemes, automatic meter reading, demand response... to demand measurement and billing. Meters supporting automatic meter reading...

445

E-Print Network 3.0 - automatic test equipment Sample Search...  

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

Powered by Explorit Topic List Advanced Search Sample search results for: automatic test equipment Page: << < 1 2 3 4 5 > >> 1 Examination of Automatic Weighing Systems (AWS)...

446

E-Print Network 3.0 - automatic positioning system Sample Search...  

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

have been carried... is initially positioned by computing a minimal path that follows image information between two automatically... Automatic Inferior Vena Cava Segmentation...

447

E-Print Network 3.0 - automatic meter reading Sample Search Results  

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

fine grained pricing schemes, automatic meter reading, demand response... to demand measurement and billing. Meters supporting automatic meter reading (AMR) can report demand......

448

Fact #850: December 8, 2014 Automatic Transmissions have closed the Fuel Economy Gap with Manual Transmissions  

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

Historically, manual transmissions have delivered better fuel economy than automatic transmissions. However, improvements in the efficiency of automatic transmissions have closed that gap in recent...

449

E-Print Network 3.0 - automatically discovering hidden Sample...  

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

for: automatically discovering hidden Page: << < 1 2 3 4 5 > >> 1 Siphoning Hidden-Web Data through Keyword-Based Interfaces Summary: automatically reconstruct a collection...

450

Automatic tuning methods for MPC environments  

Science Journals Connector (OSTI)

Model predictive control is a powerful method for controlling multivariable systems, in particular when constraints have to be taken into account. However, MPC also has negative attributes, like a high computational effort but also a non intuitive tuning. ... Keywords: Kalman filter tuning, MPC tuning, model predictive control, self tuning

Harald Waschl; Daniel Alberer; Luigi del Re

2011-02-01T23:59:59.000Z

451

Center-pivot automatization for agrochemical use  

Science Journals Connector (OSTI)

This paper presents an agrochemical application system that could be incorporated into existing irrigating center-pivots. The system consisted of a hydraulic circuit with emitters, where the dose was individually controlled with variable valve timing. ... Keywords: Agriculture, Center-pivot, Control applications, Variable valve timing control

J. Palacn; J. A. Salse; X. Clua; J. Arn; R. Blanco; C. Zanuy

2005-12-01T23:59:59.000Z

452

MHD power plant instrumentation and control  

SciTech Connect

The Electric Power Research Institute (EPRI) has awarded a contract to the MHD Development Corporation (MDC) to develop instrumentation and control requirements and strategies for commercial MHD power plants. MDC subcontracted MSE to do the technical development required. MSE is being assisted by Montana State University (MSU) for the topping cycle development. A computer model of a stand-alone MHD/steam plant is being constructed. The plant is based on the plant design set forth in the MDC proposal to the Federal Clean Coal Technology 5 solicitation. It consists of an MHD topping plant, a Heat Recovery Seed Recovery (HRSR) plant, and a steam turbo-generator. The model is based on the computer code used for a study of the Corette plant retrofitted with an MHD plant. Additional control strategies, based on MHD testing results and current steam bottoming plant control data, will be incorporated. A model will be devised and implemented for automatic control of the plant. Requirements regarding instrumentation and actuators will be documented. Instrumentation and actuators that are not commercially available will be identified. The role and desired characteristics of an expert system in the automated control scheme is being investigated. Start-up and shutdown procedures will be studied and load change dynamic performance will be evaluated. System response to abnormal topping cycle and off-design system operation will be investigated. This includes use of MHD topping cycle models which couple gasdynamic and electrical behavior for the study of controlling of the MHD topping cycle. A curvefitter, which uses cubic Hermitian spline interpolation functions in as many as five dimensions, allows much more accurate reproduction of nonlinear, multidimensional functions. This project will be the first to investigate plant dynamics and control using as many as seven independent variables or control inputs to the MHD topping cycle.

Lofftus, D.; Rudberg, D. [MSE Inc., Butte, MT (United States); Johnson, R.; Hammerstrom, D. [Montana State Univ., Bozeman, MT (United States)

1993-12-31T23:59:59.000Z

453

Bioinspired bubble design for particle generation  

Science Journals Connector (OSTI)

...Reports 1004 18 23 131 Bioinspired bubble design for particle generation Oguzhan...generate homogeneous particles from a bubble suspension, with the capability to control loading and the structure of bubbles. Ideally, a process such as this...

2012-01-01T23:59:59.000Z

454

Motor control and torque coordination of an electric vehicle actuated by two in-wheel motors  

Science Journals Connector (OSTI)

In this research, an electric vehicle actuated by two in-wheel DC motors is developed. By properly coordinating the motor torques, both drive-by-wire and electrical steering can be achieved. Two critical issues respectively related to the design of motor controllers and the coordination of the two motor torques under control saturation are investigated in this study. Firstly, as for the in-wheel motors that are used for driving and steering simultaneously, their operation covers a wider dynamic range that forward acceleration (deceleration), and reverse acceleration (deceleration) may occur alternately. To perform driving and steering smoothly and efficiently, each motor should be switched to an appropriate mode to generate the torque demanded. Secondly, during the high-speed maneuvering, the high back-emf voltage in the motor coil substantially reduces the motors torque generating capability. Since the electrical steering depends on the differential torque of two wheels, when electrical steering is demanded in this case, torque/current saturation may occur in either one of the motors and the electrical steering performance could be seriously degraded. To address these issues, controllers of two levels are proposed. For the low-level controller (the motor controller), it operates the motor automatically in an appropriate mode for performance and efficiency consideration. An input transformation is introduced to cancel the nonlinearity in current dynamics so as to control the motor torque easily and precisely regardless of mode switching. For the high-level controller (the torque coordination controller), besides generating reference commands to the low-level controllers, during control saturation it can also properly re-distributes control signals to maintain consistent steering performance and provides compensation for integrator windup. The control system is implemented and the performance is experimentally and numerically validated.

Feng-Kuang Wu; T.-J. Yeh; Chun-Feng Huang

2013-01-01T23:59:59.000Z

455

Laser Phase Control of High-Order Harmonic Generation at Large Internuclear Distance: The H{sup +}-H{sub 2}{sup +} System  

SciTech Connect

Exact (Born-Oppenheimer) 3-D numerical solutions of the time-dependent Schroedinger equation are obtained for the one electron linear H{sup +}-H{sub 2}{sup +} atom-molecule system at large internuclear distance R in interaction with two-cycles intense (I>10{sup 14} W cm{sup -2}) 800 nm laser pulses. High-order harmonic generation (HHG) spectra are obtained with an energy cutoff larger than the atomic maximum of I{sub p}+3U{sub p}, where I{sub p} is the ionization potential and U{sub p} is the ponderomotive energy. At large R, this extended cutoff is shown to be related to the nature of electron transfer, whose direction is shown to depend critically on the carrier-envelope phase (CEP) of the ultrashort pulse. Constructive and destructive interferences in the HHG spectrum resulting from coherent superpositions of electronic states in the H{sup +}-H{sub 2}{sup +} system are interpreted in terms of multiple electron trajectories extracted from a time profile analysis.

Bandrauk, Andre D.; Barmaki, Samira; Kamta, Gerard Lagmago [Laboratoire de Chimie Theorique, Faculte des Sciences, Universite de Sherbrooke, Sherbrooke, Quebec, J1K 2R2 (Canada)

2007-01-05T23:59:59.000Z

456

System for reducing heat losses from indoor swimming pools by use of automatic covers. Technical progress report No. 4, October 1, 1994--December 31, 1994  

SciTech Connect

The principal developments during the fifth quarter of the project (October - December 1994) have been as follows. (1) Design fabrication and bench testing of new 24-v controller employing automatic photocell shut-off of motor. (2) Design, fabrication and bench testing of new 42-v controller employing automatic stop-ball and limit-switch shut-off of motor. (3) Design, fabrication, installation, operation and adjustment of prototype improved pool cover system in Denver. (4) Continued planning of installation, demonstration and evaluation of improved pool cover system at the Denver Skyland Recreation Center. (5) Improved mounting brackets. (6) Preparation of a comprehensive paper on swimming pool evaporation rates.

Not Available

1995-01-15T23:59:59.000Z

457

Magnetocumulative generator  

DOE Patents (OSTI)

An improved magnetocumulative generator is described that is useful for producing magnetic fields of very high energy content over large spatial volumes. The polar directed pleated magnetocumulative generator has a housing providing a housing chamber with an electrically conducting surface. The chamber forms a coaxial system having a small radius portion and a large radius portion. When a magnetic field is injected into the chamber, from an external source, most of the magnetic flux associated therewith positions itself in the small radius portion. The propagation of an explosive detonation through high-explosive layers disposed adjacent to the housing causes a phased closure of the chamber which sweeps most of the magnetic flux into the large radius portion of the coaxial system. The energy content of the magnetic field is greatly increased by flux stretching as well as by flux compression. The energy enhanced magnetic field is utilized within the housing chamber itself.

Pettibone, J.S.; Wheeler, P.C.

1981-06-08T23:59:59.000Z

458

Monthly Generation System Peak (pbl/generation)  

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

Generation > Generation Hydro Power Wind Power Monthly GSP BPA White Book Dry Year Tools Firstgov Monthly Generation System Peak (GSP) This site is no longer maintained. Page last...

459

Photon generator  

DOE Patents (OSTI)

A photon generator includes an electron gun for emitting an electron beam, a laser for emitting a laser beam, and an interaction ring wherein the laser beam repetitively collides with the electron beam for emitting a high energy photon beam therefrom in the exemplary form of x-rays. The interaction ring is a closed loop, sized and configured for circulating the electron beam with a period substantially equal to the period of the laser beam pulses for effecting repetitive collisions.

Srinivasan-Rao, Triveni (Shoreham, NY)

2002-01-01T23:59:59.000Z

460

CERN automatic audio-conference service  

Science Journals Connector (OSTI)

Scientists from all over the world need to collaborate with CERN on a daily basis. They must be able to communicate effectively on their joint projects at any time; as a result telephone conferences have become indispensable and widely used. Managed by 6 operators, CERN already has more than 20000 hours and 5700 audio-conferences per year. However, the traditional telephone based audio-conference system needed to be modernized in three ways. Firstly, to provide the participants with more autonomy in the organization of their conferences; secondly, to eliminate the constraints of manual intervention by operators; and thirdly, to integrate the audio-conferences into a collaborative working framework. The large number, and hence cost, of the conferences prohibited externalization and so the CERN telecommunications team drew up a specification to implement a new system. It was decided to use a new commercial collaborative audio-conference solution based on the SIP protocol. The system was tested as the first European pilot and several improvements (such as billing, security, redundancy...) were implemented based on CERN's recommendations. The new automatic conference system has been operational since the second half of 2006. It is very popular for the users and has doubled the number of conferences in the past two years.

Rodrigo Sierra Moral

2010-01-01T23:59:59.000Z

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

Next Generation Calibration Models with Dimensional Modeling...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Documents & Publications Reduction of Transient Particulate Matter Spikes with Decision Tree Based Control Model-Based Transient Calibration Optimization for Next Generation Diesel...

462

Temperature controlled high voltage regulator  

DOE Patents (OSTI)

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

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

2004-04-20T23:59:59.000Z

463

Disable Automatic Login, Cyber Security, Information Technology Division,  

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

Disable Automatic Login Disable Automatic Login Automatic Login MUST be disabled... Follow the steps below to verify that auto login is disabled. Verify Security Settings Select Personal Section: Click Make sure the following required boxes are checked. - Require password to wake this computer from sleep or screen saver - Disable automatic login If so, close panel. If not, continue... Note: Mac users should have the panel locked at all times. Click the lock image to lock the panel if its open to prevent further changes. To unlock the above panel, click the lock image to bring up the login box. Insert your username & password, click . You should now be able to make changes to the panel.

464

Automatic Lighting Shutoff for Tenant Spaces - Code Notes | Building Energy  

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

Automatic Lighting Shutoff for Tenant Spaces - Code Notes Automatic Lighting Shutoff for Tenant Spaces - Code Notes Automatic shutoff capability for all interior building lighting (with exceptions) is required by ASHRAE Standard 90.1-2007 (as well as previous versions back to 1999) and the 2009 International Energy Conservation Code (including versions back to 2003) for buildings over 5,000ft2. Publication Date: Thursday, March 10, 2011 cn_automatic_lighting_shutoff_for_tenant_spaces.pdf Document Details Document Number: PNNL-SA-66719 Prepared by: Pacific Northwest National Laboratory for the U.S. Department of Energy Building Energy Codes Program Focus: Compliance Building Type: Commercial Code Referenced: ASHRAE Standard 90.1-2007 2009 IECC Document type: Code Notes Target Audience: Architect/Designer Builder Code Official

465

The Effects of Automatic Emotion Regulation on the Desirability Bias  

E-Print Network (OSTI)

by: Chair of Committee, Heather C. Lench Committee Members, Brandon J. Schmeichel Kelly L. Haws Head of Department, Ludy T. Benjamin May 2011 Major Subject: Psychology iii ABSTRACT The Effects of Automatic Emotion Regulation...

Bench, Shane William

2011-08-08T23:59:59.000Z

466

Automatic record extraction for the World Wide Web  

E-Print Network (OSTI)

As the amount of information on the World Wide Web grows, there is an increasing demand for software that can automatically process and extract information from web pages. Despite the fact that the underlying data on most ...

Shen, Yuan Kui

2006-01-01T23:59:59.000Z

467

Automatic calibration of modulated fractional-N frequency synthesizers  

E-Print Network (OSTI)

The focus of this research has been the development of a low power, radio frequency transmitter architecture. Specifically, a technique for in service automatic calibration of a modulated phase locked loop (PLL) frequency ...

McMahill, Dan

2001-01-01T23:59:59.000Z

468

Automatic fringe analysis with a computer image-processing system  

Science Journals Connector (OSTI)

The application of a general-purpose image-processing computer system to automatic fringe analysis is presented. Three areas of application have been examined where the use of a system...

Robinson, David W

1983-01-01T23:59:59.000Z

469

VEE-0043- In the Matter of Greenville Automatic Gas Company  

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

On March 11, 1997, Greenville Automatic Gas Company (Greenville) filed an Application for Exception with the Office of Hearings and Appeals (OHA) of the Department of Energy (DOE). In its...

470

Automatic detection of thesaurus relations for information retrieval applications  

Science Journals Connector (OSTI)

Is it possible to discover semantic term relations useful for thesauri without any semantic information? Yes, it is. A recent approach for automatic thesaurus construction is based on explicit linguistic knowledg...

Gerda Ruge

1997-01-01T23:59:59.000Z

471

Automatic Construction of a Dynamic Thesaurus for Proper Names  

Science Journals Connector (OSTI)

Proper names outnumber all other word classes, but they are underrepresented in dictionaries and in electronic resources. We propose an automatic method of associating a stand-alone proper name repository with...

Roman Kurc; Maciej Piasecki; Stan Szpakowicz

2013-01-01T23:59:59.000Z

472

Unsupervised One-Class Learning for Automatic Outlier Removal  

Science Journals Connector (OSTI)

Outliers are pervasive in many computer vision and pattern recognition problems. Automatically eliminating outliers scattering among practical data collections becomes increasingly important, especially for Internet inspired vision applications. In this ... Keywords: One-Class Learning, Outlier Removal

Wei Liu, Gang Hua, John R. Smith

2014-06-01T23:59:59.000Z

473

Automatic Analysis of Plot for Story Rewriting Harry Halpin  

E-Print Network (OSTI)

Automatic Analysis of Plot for Story Rewriting Harry Halpin School of Informatics University of Informatics University of Edinburgh 2 Buccleuch Place Edinburgh, EH8 9LW Scotland, UK J.Moore@ed.ac.uk Judy

Moore, Johanna D.

474

Multi-level acoustic modeling for automatic speech recognition  

E-Print Network (OSTI)

Context-dependent acoustic modeling is commonly used in large-vocabulary Automatic Speech Recognition (ASR) systems as a way to model coarticulatory variations that occur during speech production. Typically, the local ...

Chang, Hung-An, Ph. D. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

475

Testing a Procedure for Automatic Classification of Hydrometeor Types  

Science Journals Connector (OSTI)

Examples of automatic interpretation of polarimetric measurements made with an algorithm that classifies precipitation, from an Oklahoma squall line and a Florida airmass storm are presented. Developed in this paper are sensitivity tests of this ...

Dus?an S. Zrni?; Alexander Ryzhkov; Jerry Straka; Yidi Liu; J. Vivekanandan

2001-06-01T23:59:59.000Z

476

Security Requirements for Classified Automatic Data Processing Systems  

Directives, Delegations, and Requirements

To establish and describe the computer security program for classified automatic data processing (ADP) systems at the Department of Energy (DOE) Headquarters. This directive does not cancel another directive. Canceled by DOE N 251.9.

1985-07-10T23:59:59.000Z

477

Towards the automatic learning of idiomatic prepositional phrases  

Science Journals Connector (OSTI)

The objective of this work is to automatically determine, in an unsupervised manner, Spanish prepositional phrases of the type preposition nominal phrase preposition (P(NP(P) that behave in a sentence as a lexical unit and their semantic ...

Sofa N. Galicia-Haro; Alexander Gelbukh

2005-11-01T23:59:59.000Z

478

Improve SMT quality with automatically extracted paraphrase rules  

Science Journals Connector (OSTI)

We propose a novel approach to improve SMT via paraphrase rules which are automatically extracted from the bilingual training data. Without using extra paraphrase resources, we acquire the rules by comparing the source side of the parallel corpus with ...

Wei He; Hua Wu; Haifeng Wang; Ting Liu

2012-07-01T23:59:59.000Z

479

Automatic Continuous Commissioning of Measurement Instruments in Air Handling Units  

E-Print Network (OSTI)

This paper presents a robust strategy based on a condition-based adaptive statistical method for automatic commissioning of measurement instruments typically employed in air-handling units (AHU). The multivariate statistic method, principal...

Xiao, F.; Wang, S.

2006-01-01T23:59:59.000Z

480

Neural and Fuzzy Adaptive Control of Induction Motor Drives  

SciTech Connect

This paper proposes an adaptive neural network speed control scheme for an induction motor (IM) drive. The proposed scheme consists of an adaptive neural network identifier (ANNI) and an adaptive neural network controller (ANNC). For learning the quoted neural networks, a back propagation algorithm was used to automatically adjust the weights of the ANNI and ANNC in order to minimize the performance functions. Here, the ANNI can quickly estimate the plant parameters and the ANNC is used to provide on-line identification of the command and to produce a control force, such that the motor speed can accurately track the reference command. By combining artificial neural network techniques with fuzzy logic concept, a neural and fuzzy adaptive control scheme is developed. Fuzzy logic was used for the adaptation of the neural controller to improve the robustness of the generated command. The developed method is robust to load torque disturbance and the speed target variations when it ensures precise trajectory tracking with the prescribed dynamics. The algorithm was verified by simulation and the results obtained demonstrate the effectiveness of the IM designed controller.

Bensalem, Y. [Research Unit of Modelisation, Analyse, Command of Systems MACS (Tunisia); Sbita, L.; Abdelkrim, M. N. [6029 Universite High School of Engineering-Gabes-Tunisia (Tunisia)

2008-06-12T23:59:59.000Z

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.


481

Generation Technologies  

E-Print Network (OSTI)

Many local governments are using green power in their facilities and providing assistance to local businesses and residents to do the same. Green power is a subset of renewable energy that is produced with no GHG emissions, typically from solar, wind, geothermal, biogas, biomass, or low-impact small hydroelectric sources, includes three types of products: utility products (i.e., green power purchased from the utility through the electricity grid), renewable energy certificates (RECs), and on-site generation. Opportunities to purchase these products are increasing significantly, with annual green power market growth rates

Green Power

2005-01-01T23:59:59.000Z

482

A Distributed Control Group of Mobile Robots in a Limited Area with a Vision System  

Science Journals Connector (OSTI)

Digital remote manual control systems are no less complicated than automatic control. Engineers have to overcome number of unique problems. Mechanical parts have to respond to digital signals transferred through ...

Artur Babiarz; Robert Bieda; Krzysztof Jaskot

2013-01-01T23:59:59.000Z

483

Magnetocumulative generator  

DOE Patents (OSTI)

An improved magnetocumulative generator is described that is useful for producing magnetic fields of very high energy content over large spatial volumes. The polar directed pleated magnetocumulative generator has a housing (100, 101, 102, 103, 104, 105) providing a housing chamber (106) with an electrically conducting surface. The chamber (106) forms a coaxial system having a small radius portion and a large radius portion. When a magnetic field is injected into the chamber (106), from an external source, most of the magnetic flux associated therewith positions itself in the small radius portion. The propagation of an explosive detonation through high-explosive layers (107, 108) disposed adjacent to the housing causes a phased closure of the chamber (106) which sweeps most of the magnetic flux into the large radius portion of the coaxial system. The energy content of the magnetic field is greatly increased by flux stretching as well as by flux compression. The energy enhanced magnetic field is utilized within the housing chamber itself.

Pettibone, Joseph S. (Livermore, CA); Wheeler, Paul C. (Livermore, CA)

1983-01-01T23:59:59.000Z

484

Fault tolerant control of automatically controlled vehicles in response to brake system failures  

E-Print Network (OSTI)

in the brake system is vital. In this thesis, nonlinear failure detection filters are used for fault detection of sensors and actuators in a class of nonlinear systems. In this thesis, the effects of brake system failures in an AHS where the vehicle steering...

Hsien, Li-Wei

2012-06-07T23:59:59.000Z

485

Robotic Assembly and Contact Force Control  

E-Print Network (OSTI)

indis- pensable in many applications, such as spot welding and painting in the automotive industryRobotic Assembly and Contact Force Control Andreas Stolt Department of Automatic Control Lund in Sweden, Lund University, Lund 2012 #12;Abstract Modern industrial robots are traditionally programmed

486

Biogass Generator  

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

Another internet tool by: Another internet tool by: Build Your Own Page 1 of 5 Teach...build...learn...renewable energy! Biogas Generator A Renewable Energy Project Kit The Pembina Institute What Is Biogas? Biogas is actually a mixture of gases, usually carbon dioxide and methane. It is produced by a few kinds of microorganisms, usually when air or oxygen is absent. (The absence of oxygen is called "anaerobic conditions.") Animals that eat a lot of plant material, particularly grazing animals such as cattle, produce large amounts of biogas. The biogas is produced not by the cow or elephant, but by billions of microor- ganisms living in its digestive system. Biogas also develops in bogs and at the bottom of lakes, where decaying organic matter builds up under wet and

487

Control of household refrigerators. Part 1: Modeling temperature control performance  

SciTech Connect

Commercial household refrigerators use simple, cost-effective, temperature controllers to obtain acceptable control. A manually adjusted airflow damper regulates the freezer compartment temperature while a thermostat controls operation of the compressor and evaporator fan to regulate refrigerator compartment temperature. Dual compartment temperature control can be achieved with automatic airflow dampers that function independently of the compressor and evaporator fan thermostat, resulting in improved temperature control quality and energy consumption. Under dual control, freezer temperature is controlled by the thermostat while the damper controls refrigerator temperature by regulating airflow circulation. A simulation model is presented that analyzes a household refrigerator configured with a conventional thermostat and both manual and automatic dampers. The model provides a new paradigm for investigating refrigerator systems and temperature control performance relative to the extensive verification testing that is typically done by manufacturers. The effects of each type of control and damper configuration are compared with respect to energy usage, control quality, and ambient temperature shift criteria. The results indicate that the appropriate control configuration can have significant effects and can improve plant performance.

Graviss, K.J.; Collins, R.L.

1999-07-01T23:59:59.000Z

488

Automatic building of a web-like structure based on thermoplastic adhesive  

Science Journals Connector (OSTI)

Animals build structures to extend their control over certain aspects of the environment; e.g., orb-weaver spiders build webs to capture prey, etc. Inspired by this behaviour of animals, we attempt to develop robotics technology that allows a robot to automatically builds structures to help it accomplish certain tasks. In this paper we show automatic building of a web-like structure with a robot arm based on thermoplastic adhesive (TPA) material. The material properties of TPA, such as elasticity, adhesiveness, and low melting temperature, make it possible for a robot to form threads across an open space by an extrusion-drawing process and then combine several of these threads into a web-like structure. The problems addressed here are discovering which parameters determine the thickness of a thread and determining how web-like structures may be used for certain tasks. We first present a model for the extrusion and the drawing of TPA threads which also includes the temperature-dependent material properties. The model verification result shows that the increasing relative surface area of the TPA thread as it is drawn thinner increases the heat loss of the thread, and that by controlling how quickly the thread is drawn, a range of diameters can be achieved from 0.20.75 mm. We then present a method based on a generalized nonlinear finite element truss model. The model was validated and could predict the deformation of various web-like structures when payloads are added. At the end, we demonstrate automatic building of a web-like structure for payload bearing.

Derek Leach; Liyu Wang; Dorothea Reusser; Fumiya Iida

2014-01-01T23:59:59.000Z

489

Hybrid intelligent control scheme for air heating system using fuzzy logic and genetic algorithm  

SciTech Connect

Fuzzy logic provides a means for converting a linguistic control strategy, based on expert knowledge, into an automatic control strategy. Its performance depends on membership function and rule sets. In the traditional Fuzzy Logic Control (FLC) approach, the optimal membership is formed by trial-and-error method. In this paper, Genetic Algorithm (GA) is applied to generate the optimal membership function of FLC. The membership function thus obtained is utilized in the design of the Hybrid Intelligent Control (HIC) scheme. The investigation is carried out for an Air Heat System (AHS), an important component of drying process. The knowledge of the optimum PID controller designed, is used to develop the traditional FLC scheme. The computational difficulties in finding optimal membership function of traditional FLC is alleviated using GA In the design of HIC scheme. The qualitative performance indices are evaluated for the three control strategies, namely, PID, FLC and HIC. The comparison reveals that the HIC scheme designed based on the hybridization of FLC with GA performs better. Moreover, GA is found to be an effective tool for designing the FLC, eliminating the human interface required to generate the membership functions.

Thyagarajan, T.; Shanmugam, J.; Ponnavaikko, M.; Panda, R.C.

2000-01-01T23:59:59.000Z

490

A fuzzy behaviorist approach to sensor-based robot control  

SciTech Connect

Sensor-based operation of autonomous robots in unstructured and/or outdoor environments has revealed to be an extremely challenging problem, mainly because of the difficulties encountered when attempting to represent the many uncertainties which are always present in the real world. These uncertainties are primarily due to sensor imprecisions and unpredictability of the environment, i.e., lack of full knowledge of the environment characteristics and dynamics. An approach. which we have named the {open_quotes}Fuzzy Behaviorist Approach{close_quotes} (FBA) is proposed in an attempt to remedy some of these difficulties. This approach is based on the representation of the system`s uncertainties using Fuzzy Set Theory-based approximations and on the representation of the reasoning and control schemes as sets of elemental behaviors. Using the FBA, a formalism for rule base development and an automated generator of fuzzy rules have been developed. This automated system can automatically construct the set of membership functions corresponding to fuzzy behaviors. Once these have been expressed in qualitative terms by the user. The system also checks for completeness of the rule base and for non-redundancy of the rules (which has traditionally been a major hurdle in rule base development). Two major conceptual features, the suppression and inhibition mechanisms which allow to express a dominance between behaviors are discussed in detail. Some experimental results obtained with the automated fuzzy, rule generator applied to the domain of sensor-based navigation in aprion unknown environments. using one of our autonomous test-bed robots as well as a real car in outdoor environments, are then reviewed and discussed to illustrate the feasibility of large-scale automatic fuzzy rule generation using the {open_quotes}Fuzzy Behaviorist{close_quotes} concepts.

Pin, F.G.

1996-05-01T23:59:59.000Z

491

Reduced-order residential home modeling for model predictive control  

Science Journals Connector (OSTI)

Abstract Building simulation software packages such as EnergyPlus are useful energy modeling tools. These software packages, however, are often not amenable to model-based control due to model complexity or difficulties connecting control algorithms with the software. We present a method for automatically generating input/output data from an EnergyPlus residential home model using the OpenStudio software suite. These input/output data are used to create a simple reduced-order model that can be evaluated in fractions of a second. The reduced-order model is implemented in a model predictive controller to minimize the home's electricity costs during summer months in Austin, Texas, USA. The controller optimally precools the home in the morning and turns down or off the air conditioning system in the afternoon. For this example, electricity prices were taken from actual market prices in the Austin area. The optimal precooling strategy given by the model predictive controller reduces peak energy consumption from the air conditioning unit by an average of 70% and reduces operating costs by 60%. Precooling, however, consumes more total energy versus not precooling. Reducing peak energy consumption by 1kWh results, on average, in an increase of 0.63kWh in overall energy consumption.

Wesley J. Cole; Kody M. Powell; Elaine T. Hale; Thomas F. Edgar

2014-01-01T23:59:59.000Z

492

Automatic Generation and Evolution of Model Transformations Using Ontology Engineering Space  

Science Journals Connector (OSTI)

Model-driven software development facilitates faster and more flexible integration of information and communication systems. It divides system descriptions into models of different view points and abstraction levels. To effectively realize cross-organisational ...

Stephan Roser; Bernhard Bauer

2008-12-01T23:59:59.000Z

493

Automatic resource specification generation for resource selection in large-scale distributed environments  

E-Print Network (OSTI)

by Varying SCR.. 117of predicted RC size change due to varying SCR for smallRC size change due to varying SCR and parallelism for larger

Huang, Richard Yu-Hua

2007-01-01T23:59:59.000Z

494

Query reformulation using automatically generated query concepts from a document space  

E-Print Network (OSTI)

Chang,Y. Ounis,I. Kim,M. To appear in Information Processing and Management journal (IPM) Elsevier Science

Chang, Y.; Ounis, I.

495

E-Print Network 3.0 - automatically-generated template features...  

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

Computer Technologies and Information Sciences 4 Apprendimento Automatico Nicola Di Mauro Summary: ' This is a template to describe unigram features. When you give a template...

496

Automatic Generation of Virtual Cities Based on User Defined Zoning Districts  

E-Print Network (OSTI)

buildings to incorporate with satelite imagery[23]. Google SketchUp is a 3D modeling package available to any user looking to contribute to Google Earth[26]. Users may submit 3D models to a building catalog called 3D Warehouse[23]. Google has standards...

Van Maanen, Kathryn Elizabeth

2012-07-16T23:59:59.000Z

497

CHASM : Static Analysis and Automatic Code Generation for Improved Fortran 90 and C++ Interoperability /  

SciTech Connect

The relative simplicity and design of the Fortran 77 language allowed for reasonable interoperability with C and C++. Fortran 90, on the other hand, introduces several new and complex features to the language that severely degrade the ability of a mixed Fortran and C++ development environment. Major new items added to Fortran are user-defined types, pointers, and several new array features. Each of these items introduce difficulties because the Fortran 90 procedure calling convention was not designed with interoperability as an important design goal. For example, Fortran 90 arrays are passed by array descriptor, which is not specified by the language and therefore depends on a particular compiler implementation. This paper describes a set of software tools that parses Fortran 90 source code and produces mediating interface functions which allow access to Fortran 90 libraries from C++.

Lindlan, K. A. (Kathie A.); Mohr, B. (Bernd); Striegnitz, J. (Jorg); Rasmussen, C. E. (Craig E.)

2001-01-01T23:59:59.000Z

498

E-Print Network 3.0 - aroma automatic generation Sample Search...  

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

24, 2010 - 1... out brands Tags: aroma, chemistry, coffee, colorimetric sensor, optoelectronics, University... coffee aromas to a high degree of specificity and accuracy. In...

499

Smart Blueprints: Automatically Generated Maps of Homes and the Devices Within Them  

E-Print Network (OSTI)

,whitehouse}@cs.virginia.edu Abstract. Off-the-shelf home automation technology is making it easier than ever for people to convert of collected data. 1 Introduction Commercial off-the-shelf home automation devices are becoming smaller, more location within the home and its spatial relationship to other devices. For example, a lighting automation

Whitehouse, Kamin

500

WN-Toolkit: Automatic generation of WordNets following the expand model  

E-Print Network (OSTI)

) , Italian (Multiwordnet) (Pianta et al., 2002) and Portuguese (OpenWN- PT) (de Paiva and Rademaker, 2012