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International Conference on Power Electronics and Drive systems (PEDS)

作者： Zhang Xue Li Yongdong Yin Tong National Control Unit Device and System Engineering Research Center Beijing Control Engineering Institute Beijing China Department of electrical Engineering Tsinghua University Beijing China Servo Institute Academy of Metallurgy automation Beijing China

ISBN: (纸本)0780324234

This paper presents a fully digital control of a PMSM (permanent magnet synchronous motor) servo drive based on dual-CPUs, one CPU is an INTEL 8098 used for monitoring and feedback control of speed, another is digital signal processor TMS320C25, which can implement the precise current control by software. A current predicting method is proposed and tested by simulations. Then two methods of outputting space voltage vectors are presented and compared, Finally, the experimental results of PMSM servo system are given. Simulation and experimental results confirm that this fully digital control system has good performance of speed response.< >

关键词： Digital control Servomechanisms Digital signal processing Permanent magnet motors Monitoring Feedback control Digital signal processors Current control Testing Predictive models

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Steady‐state security evaluation of electrical power systems by means of artificial neural network

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European Transactions on Electrical Power 1995年第2期5卷 91-97页

作者： Chiodo, E. Menniti, D. Testa, A. Picardi, C. Elio Chiodo (1959) received the degree in Electronics Engineering in 1985 and the Ph.D. degree in Computational Statistics both from the University of Naplefltaly. He is a Researcher at the Department of Electrical Engineering of the University of Naples and a member of the Italian Statistical Society. His areas of interest include probabilistic methods applied to electric power systems analysis. (University of Naples Fedrrico 11. Electrical Engineering Dept.via Claudio 21 1-80125 Naplefltaly T +3981/7683226 Fax+3981/2396897) Daniele Menniti (1958) received the degree in Electrical Engineering from the University of Calabria. Cosenzataly and the Ph.D. degree in Electrical Engineering from the University of NapleslItaly in 1984 and 1989 respectively. He is a researcher at the Electronic. Computer and Systems Science Department of the University of Calabria. Italy. Hiscurrent research interests concern electric power system analysis real-time control and automation. (University of Calabria Electronic Computer and Systems Science Dep. Arcavacataji Rende (CS). 1-87036 CosenzdItaly T +39984/494707. Fax +39984/4947 13) Alfredo Testa (1950) received the degree in Electrical Engineering from the University of Naples/Italy in 1975. He is an Associate Professor in Electrical Power Systems at the Department of Electrical Engineering of the University of Naples. He is engaged in researches on electrical power systems reliability and harmonic analysis. (University of Naples Federico 11. Electrical Engineering Dep. via Claudio '2 1 1-80 I25 NapleslItaly T + 39 8 I/7 68 3'2 11. Fax+3981/2396897) Ciro Picardi (1949) received the degree in Electronics Engineering from the University of Naples/Italy in 1975. He is currently Associate Professor in Process Control at the Department of Electronic Computer and System Science of the University of Calabria. Italy. His current research interests are in the area of electrical drives robotics neural networks and fuzzy control. (University of Calabria Electronic. Compu

An artificial‐neural‐network (ANN) application for steady‐state security evaluation of electrical power systems is presented. Such application is based upon a combined use of a multilayer back‐propagation neural network and of an opportune electrical system model, previously proposed by some of the authors. In the paper, the definition of steady‐state security and the problems arising from its on‐line evaluation are briefly recalled. Then, the ANN utilized is described with particular reference to the solutions adopted by the authors. Afterwards, some remarks on the system model utilized are reported. Finally, numerical applications on the AEP‐14 bus system are presented and the results obtained with different ANN configurations are analyzed. Copyright © 1995 John Wiley & Sons, Ltd.

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SHIPS SERVICE ELECTRIC-POWER - ENHANCED SURVIVABILITY VIA EARLY DETECTION OF INCIPIENT CABLE FAULTS

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NAVAL ENGINEERS JOURNAL 1993年第3期105卷 78-84页

作者： WILLIAMS, SE RUSSELL, BD Stephen E. Williams:graduated summa cum laude from Texas A&M University with a B.S. degree in electrical engineering in 1991. He is still at Texas A&M while completing an M.S. in E.E. with special interest in low voltage (less than 600 V) network protection. Mr. Williams is a National Science Foundation Graduate Research Fellow and a student member of the IEEE. B. Don Russell:received B.S. and M.E. degrees in electrical engineering at Texas A&M University. He holds a Ph.D. from the University of Oklahoma in power system engineering. Dr. Russell is a professor of electrical engineering and director of the Power System Automation Laboratory of the Electric Power Institute Texas A&M University. His research centers on the use of advanced technologies to solve problems in power system control protection and monitoring. He is the recipient of several awards and patents for advanced digital technology applications. Dr. Russell is a member of the IEEE Power Engineering Society Executive Board. He also chairs the annual TAMU Conference for Protective Relay Engineers and the Fault and Disturbance Analysis Conference. Dr. Russell is a fellow of the IEEE a Registered Professional Engineer and a member of the Texas Society of Professional Engineers.

Researchers at Texas A&M Universitv have studied the effects of battle damage on ship power distribution cables, with particular interest in damaged cables which did not fail immediately. The electrical signatures of partiallv damaged cables are significant and are detectable with advanced protection methods used on terrestrial power svstems. Findings show that the damaged cable signatures are similar to those of arcing faults on terrestrial power distribution svstems, which can be reliably detected using an on-line expert svstem [1,2,3]. The implications of these findings are significant. Since the abilitv of a damaged ship to right through an encounter is entirelv dependent on keeping operational its various systems which rely on electric power, the ability to automatically detect and re-route power around damaged regions is imperative. By identifving the characteristics of failing power cables before catastrophic failure occurs, the protection process can be integrated into the ship automatic control system. The overall result is a more survivable ship.

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Simple robust adaptive control of static VAR compensator

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European Transactions on Electrical Power 1993年第6期3卷 429-435页

作者： Machowski, J. Nelles, D. Jan Machowski (1950) received the M.Sc. degree in Electrical Faculty of Warsaw University of Technology in 1974. For two years he was employed in the Power Dispatching Centre in Warsaw/Poland. Later after gaining some field experience in several power plants he did a postgraduate study at Warsaw University of Technology where he received his Ph.D. degree in 1979. In the same year he joined the Electrical Faculty of Warsaw University of Technology where he is presently employed as a professor and head of the power system protection and control group. His areas of interest are power systems analysis protection and control. Since October 1989 he has been with Kaiserslautem University/Germany. (Univ. Kaiserslautern FB Elektrotechnik. P.O. Box 30 49 67618 Kaiserslautem T +4963/205-3431 Fax +49631/205-21 68) Dieter Nelles (1939). VDE received the Dipl.-Ing. degree in electrical engineering in 1966 from the Technical University in Darmstadt/Germany and the Dr.-Ing. degree in 1973 from the Technical University of Berlird/Germany. Since 1966 he has been with the Technical and Science Department of AEG-Telefunken (Frankfurt/M Germany) as a research engineer and since 1972 as the head of this department. In 1982 he joined the Electical Faculty of Kaiserslautem University where he presently is il professor of eletrical engineering and head of the Electrical Energy Supply Group. His special areas of interest are powersystem stability. power system protection and power system control. He is a member of VDE and serves as the chairman of Synchronous Machines Regulation and Excitation Systems Committee. (Univ. Kaisers-lautem FB Elektrotechnik. P.O. Box 304967618 Kaiserslautem T +49631/205-28 46 Fax +49631/205-21 68)

A study of power system transient stability enhancement through effective use of static VAR compensator is presented. It is shown that optimal state‐variable control can be approximately realized as a simple closed‐loop control based on locally measurable electric quantities. In order to make this regulation more effective and insensitive to the changes of the network parameters and loading condition it is proposed to use simple adaptive control with dynamic gain tuned by additional control loops. Tests done for two‐machine and multi‐machine systems have confirmed the validity and robustness of the proposed control method. Copyright © 1993 John Wiley & Sons, Ltd.

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An approach to the direct analysis of transient stability

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European Transactions on Electrical Power 1993年第3期3卷 241-248页

作者： Djukanovic, M.B. Sobajic, D.J. Pao, Y.‐H. Miodrag B. Djukanovic (1959) received his B.S. M.Sc. and Ph.D. degrees in Electrical Engineering from the University of Belgrade/Yugoslavia in 1982 1985 and 1992 respectively specializing in electric power systems. In 1984 he joined the Electrical Engineering Institute “Nikola Tesla” in Belgrade where he was working on the scientific studies in the field of power systems planning operation and control. In 1985 and 1990 he was appointed as a research scholar at the Royal Institute of Technology Stockholm and Case Western Reserve University Cleveland Ohio. His major in- terests are in the area of power system analysis steady-state and dynamic security and application of neural networks in electric power systems. (Electrical Engineering Institute “Nicola Tesla” ul. Koste Glavinica 8A YU-11000 Belgrad T +3811/2351-619 Fax + 3811/2351-823) Dejan J. Sobajic (1949) received the B.S.E.E. and the M.S.E.E. degrees from the University of Belgrade/Yugoslavia in 1972 and 1976 respectively and the Ph.D. degree from Case Western Reserve University Cleveland Ohio in 1988. At present he is with the Department of Electrical Engineering and Applied Physics Case Western Reserve University Cleveland. He is also the Engineering Manager of A1 WARE Inc. Cleveland. His current research interests include power system operation and control neuralnet systems and adaptive control. He is a member of the IEEE Task Force on Neural-Network Applications in Power Systems and of the IEEE Intelligent Controls Committee. He is the Chairman of the International Neural-Networks Society Special Interest Group on Power Engineering. (Case Western Reserve University Department of Electrial Engineering and Computer Sciences Glennan Building Ohio 44 106 USA T + 1216/421-2380 Fax +1216/368-8776) Yoh-Han Pao (1922) has been a Professor of Electrical Engineering and Computer Science at Case Westem Reserve University (CWRU) Cleveland Ohio since 1967. He has served as chairman of the University's Electrical Engineering Department

The Transient Energy Function (TEF) method has been intensely investigated over the last decade as a reliable and accurate tool for transient stability assessment of multimachine power systems. In this paper we propose the Potential Energy Boundary Surface (PEBS) based method for direct analysis of transient stability. The critical value of transient energy and the Critical Clearing Time (T_CCT) are evaluated without the need for successive calculation and memorization of the system kinetic and potential energy values along the sustained fault trajectory. The method is used for determination of output features in the training phase of the neural‐net based transient security assessment. The proposed approach is tested on the well‐known ten‐generator New England test system demonstrating the validity and accuracy of obtained results. Copyright © 1993 John Wiley & Sons, Ltd.

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DAMAGE control - THE LAST LINE OF SHIPBOARD DEFENSE

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NAVAL ENGINEERS JOURNAL 1992年第1期104卷 63-79页

作者： HERMAN, S LOESER, CT Stanley Hermanis the acting director of the Ship Survivability Subgroup (Sea 55X) at the Naval Sea Systems Command. He received a BSME from Northeastern University in 1966 and a MSME from Northeastern in 1970. In 1978 he completed requirements for a Certificate in Acoustics at Catholic University and in 1989 he completed the Program Management Course at the Department of Defense Systems Management College. He is a registered professional engineer in Washington D.C. a certified NavSea Material Professional and a member of ASME ASE and SNAME. Mr. Herman began his career with the Navy Department immediately after high school working as a student trainee (marine engineer) at the Boston Naval Shipyard until 1966. Upon obtaining his BSME he served as a project engineer in the Noise Shock and Vibration Group at the Boston Naval Shipyard and was responsible for conducting and directing shipyard and at-sea testing and evaluation of components systems and structure for surface combatant and auxiliary naval craft. In 1974 he transferred to the Naval Sea Systems Command where he was the coordinator of survivability and detection for the SSBN Trident submarine acquisition project manager PMS 396. He was responsible for directing efforts to enhance the acoustical silencing underwater explosion shock protection and shipboard vibration control for this latest class of strategic missile submarines. From 1982 to 1986 Mr. Herman was assigned as head of the Submarine Protection branch Sea 55X11 where he was responsible for directing submarine shock hardening programs. From 1986 to 1991 he served as division director for damage control Systems Safety Personnel Protection and CBR Defense Sea 55X2. In 1991 he assumed his present position of acting director Ship Survivability Subgroup Sea 55X. Christopher T. Loeseris currently acting director of the Damage Control and Ship Design Systems Safety Division at the Naval Sea Systems Command. The division is responsible for lifecycle management of damage control chemical

This paper addresses the ship, system and equipment design features, operational doctrine and training that has been developed to provide effective shipboard damage control. Both the ship and the sailor are addressed, since both are integral and interdependent components of the damage control "system." Also, the enhancements afforded to protection of personnel from the effects of conventional and nonconventional weapons are discussed. Finally, a brief look into the future is presented. With the shrinking defense budget and corresponding reduction in fleet size and ship manning, novel system designs and automated decision aids will be required to do the job.

关键词： Naval Vessels

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New algorithms for earthfault distance protection in insulated and compensated networks

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European Transactions on Electrical Power 1991年第5期1卷 253-259页

作者： Igel, M. Koglin, H.‐J. Schegner, P. Dr.-lng. Michael Igel (1961). VDE received his Dip1.-lng. degree in Electrical Engineering at the University of SaarlandGermany. in 1987 and became scientific assistant at the Lehrstuhl fur Energieversorgung of this University. After receiving his Dr.-Ing. degree in 1990. he presently works as development engineer of the department of protection systems in the power transmission and distribution division of AEG at Frankfurt a. M./Germany. (AEG Aktiengesellschaft Lyoner Str. 44-48. D-6000 Frankfurt 7 I T + 49 69/66 40 16 I 7) Prof. Dr.-lng. Hans-Jurgen Koglin (1937). VDE holds the Lehrstuhl fur Energieversorgung of the University of SaarlandGermany since 1983. After the study of Electrical Engineering (power engineering) at the Technische Hochschule DarmstadtIGermany. he worked as a scientific assistant at the “Institut fur Elektrische Enerpieversorgung” of this Unive:rsity. After receiving his Dr.-lng. degree he tirst worked as assistant professor later on as full Professor at the Technische Hochschule Darmstadt (Department “Systemfuhrung in Energieversorgungsnetzen”). He is member i n several national and international committees. His most important research activities are: reliability evaluation computer-optimized network development planning digital network protection systems substation control system state estimation. corrective switching visibility of overhead lines. (Universitat des Saarlandes Lehrstuhl fur Energieversorgung Im Stadtwald D-6600 Saarbriicken I I T + 4 9 6 8 113 023979) Dr.-Ing. Peter Schegner (1955) VDEis head of the development department of protection systems in .the power transmission and distribution division of AEG at Frankfurt a. M./Gerrnany. He studied Electrical Power Engineering at the Technische Hochschule Darmstadt/Genany and worked as system engineer in the field of power system control. He became a member of the scientific staff at the Universitiit des Saarlandes receiving his degree with a thesis on the earthfault distance protection. (AEG Aktiengesellschaft

Through the analysis of transient signals after the occurrence of an earthfault it is possible to evaluate fault direction and fault distance. The faulty line is simulated by using a three phase Tl‐model. The result is a differential equation of a higher order, which only consists of voltages and currents, which are measured at the installation point of the relay. If the capacities of the part of the network without earthfault are considerably larger than those of the faulty line, the line capacities of the faulty line can be ignored in the differential equation. This results in afirst‐jorder differential equation, which can be solved by integration in the time domain. A second algorithm takes the line capacities into consideration. The derivatives of the input signals are calculated in the frequency domain. A third algorithm calculates the equivalent fault inductivity in the frequency domain by complex division. The last algorithm deals with the line capacities by using correction factors. The mode of operation of the earthfault distance algorithms presented here will be shown with the example of a 22‐kV‐overhead line network. Copyright © 1991 John Wiley & Sons, Ltd.

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A pattern recognition approach for steady‐state security evaluation of an electrical power system

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European Transactions on Electrical Power 1991年第5期1卷 243-251页

A new pattern recognition approach to steady‐state security evaluation of electrical power systems is presented. Such approach is based upon a combined use of the „nearest‐neighbour” method and of an opportune system model ‐ previously proposed by the authors ‐for the basis of knowledge generation. In the first part of the paper, the definition of steady‐state security and the problems arising from its on‐line evaluation are briefly recalled. Then, the pattern recognition approach proposed is described in some detail, and its ability in order to overcome the computational drawbacks of traditional methods is illustrated. Afterwards, some remarks on the system model utilized are reported. Finally, a numerical experiment with reference to the AEP 14 bus test system is presented, showing very encouraging results. Copyright © 1991 John Wiley & Sons, Ltd.

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Interactive power system data preparation and verification using a pc‐editor

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European Transactions on Electrical Power 1991年第3期1卷 149-152页

作者： Linke, K. Rumpel, D. Dip1.-Ing. Klaus Linke (1939) VDEis the director of the department "load dispatching and network operation" of Vereinigte Elektrizitatswerke Westfalen AG (VEW). DortmundGermany. After the study of electrical engineering at the Technical University of KarlsruhdGermany he started his professional career in an engineering-concern where he was responsible among others for investigations concerning the installation of process-computers in chemical plants. In 1968 he changed to VEW. Here in 1984 he took over his present position in which he is mainly engaged with the tasks of the management of the HV and EHV network and the power system control together with the problems concerning network automation incident to it. (Vereinigte Elektrizitatswerke Westfalen AG Hauptverwaltung Rheinlanddamm 24 W-4600 Dortmund 1 T +49 23 114 38-42 41) Dr.-Ing. Dieter Rumpel (1932) VDE is full professor and since 1978 head of the Power Systems Institute of Duisburg University Germany. He got his DiplAng. degree from the Technical University Munich and his Dr.-Ing. degree from the Technical University Berlin. Before his call to Duisburg he worked at Siemens AG for 23 years. (Universiiit-GHDuisburg Fachbereich Elektrotechnik PF 10 15 03 W-4100 Duisburg T 4 9 20 313 79-34 37)

For computerized power system operation, all objects of the network must be mapped in a data‐model. For this task, the „Grid Data Language” (GDL) does not apply format‐bound source data, but describes the objects using a format‐free source text. To handle such texts, an editing‐ and verification‐system was implemented. This paper reports its application when describing an extra‐high voltage network for use in a training simulator. In that way, the full content of a dispatcher EHV data‐model could be converted to GDL, requiring a work of 15 to 20 man‐days. Copyright © 1991 John Wiley & Sons, Ltd.

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THE REALITIES AND CHALLENGES OF PLANT BIOTECHNOLOGY

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BIO-TECHNOLOGY 1990年第4期8卷 296-301页

作者： VASIL, IK Indra K. Vasil is graduate research professor in the laboratory of plant cell and molecular biology department of vergetable crops University of Florida Gainesville FL 32611-0514. This article is based on a paper presented at AgBiotech '89.REFERENCES Borlaug N.E. and Dowswell C.R.1988. World revolution in agriculture pp. 5-14 in 1988 Book of the Year. Encyclopedia Brittanica Chicago.Vasil I.K.1988. The contributions and prospects of plant biotechnologyan assessment pp. 15-19 in Plant Cell Biotechnology. M. S. S. Pais F. Mavituna and J. M. Novais (eds.) Springer-Verlag Heidelberg.The Molecular Basis of Plant Development. 1989. R. Goldberg (ed.) Alan R. Liss New York.CCSCGP V. 6.Gautheret R.J.1985. History of plant tissue and cell culture: a personal account pp. 1-59 in CCSCGP V. 2.CCSCGP V. 3.Vasil I.K. and Vasil V.1980. Clonal propagation. Int. Rev. Cytol. Supp.11A: 145-173.Tissue Culture as a Plant Production System for Horticultural Crops. 1986. R.H. Zimmerman R.J. Griesbach F.A. Hammerschlag and R.H. Lawson (eds.) Martinus Nijhoff Publishers Dordrecht.Levin R. Gaba V. Tal B. Hirsch S. DeNola D. and Vasil I.K.1988. Automated plant tissue culture for mass propagation. Bio/Technology6: 1035-1040.|ISI|Kartha K.K.1984. Elimination of viruses pp. 577-585 in CCSCGP V. 1.Wang P.J. and Hu C.Y.1980. Regeneration of virus-free plants through in vitro culture pp. 61-99 in Advances in Biochemical Engineering Volume 18. Plant Cell Cultures II. A. Fiechter (ed.) Springer-Verlag Heidelberg.Collins G.B. and Grosser J.W.1984. Culture of embryos pp. 241-257 in CCSCGP V. 1.Raghavan V.1986. Variability through wide crosses and embryo rescue pp. 613-633 in CCSCGP V. 3.Nitzsche W. and Wenzel G.1977. Haploids in plant breeding. Z. Pflanzcht. Supp.8: 1-101.Haploids of Higher Plants in vitro. 1986. H. Hu and H. Yang (eds.) Springer-Verlag Heidelberg.D'Amato F.1985. Cytogenetics of plant cell and tissue cultures and their regenerants. CRC Crit. Rev. Pl. Sci.3: 73-1

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