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

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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NETWORK PLANNING BASED ON VIRTUAL PATH BANDWIDTH MANAGEMENT

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INTERNATIONAL JOURNAL OF COMMUNICATION systemS 1995年第2期8卷 143-153页

作者： LOGOTHETIS, M KOKKINAKIS, G Wire Communications Lab. Electrical Engineering Dept. University of Patras 261 10 Patras Greece Michael D. Logothetis was born in Andros Greece in 1959. He received the Dipl.-Eng. and Ph.D. degrees in electrical engineering both from the University of Patras PatradGreece in 1981 and 1990 respectively. From 1982 to 1990 he was a Teaching and Research Assistant at the laboratory of Wire Communications University of Patras and participated in many national research programmes and three EEC projects (ESPRIT LRE) dealing with telecommunication networks as well as with natural language processing. From 1991 to 1992 he was Research Associate in NTT's Telecommunication Networks Laboratories. Since 1992 he has been a Lecturer in the Department of Electrical Engineering University of Patras Greece. His research interests include traffic control network management simulation and performance optimization of telecommunication networks. He is a member of the IEEE (Commun. Society-CNOM) IEICE and the Technical Chamber of Greece (TEE). George K. Kokkinakis was born in Chios Greece in 1937. He received the Diploma in Electrical Engineering (Dipl.-Ing.) in 1961 the Doctor's Degree in Engineering (Dr.-Ing) in 1966 and the Diploma in Engineering Economics (Dipl. Wjrt.-Ing) in 1967 all from the Technical University of Munich Germany. Since 1969 he has been with the Department of Electrical Engineering at the University of Patras where he has organGed and directing the Wire Communications Laboratory (WCL). His current activity in research and development which coincides with the activity of WCL includes the design and optimization of telecommunication networks and the analysis synthesis recognition and linguistic processing of the Greek language. He has published several books and over 100 technical papers articles and reports on Telecommunications Electrotechnology and Speech Technology. Prof. Kokkinakis is a senior member of IEEE and a member of the Technical Chamber of Greece (TEE) the VDE (Vere

Periodical performance evaluation and adaptive resource assignment, already proposed as performance-oriented management, seems to be the most suitable strategy for network planning under demand uncertainty. In this paper, we exploit the inherent capability of ATM networks to rearrange dynamically the already installed resources, and propose performance-oriented management combined with virtual path bandwidth (VPB) control for the planning of the extensions of bandwidth capacities of virtual paths (VPs) and transmission links of the network. We define a large network optimization problem and solve it by a rigorous, analytical procedure. The optimization model comprises specific requirements of the network-planning problem and a bandwidth distribution scheme ensuring network reliability. We reveal the efficiency of the proposed scheme by applying it on a model network, considering two realistic case-studies of network-traffic evolution. We show that in the presence of VPB control: (a) the initial distribution of the total bandwidth to VPs is of no importance, since it can be adaptively rearranged according to the offered traffic, (b) the network is well used and bandwidth investment could be saved, and (c) whenever additional bandwidth must be installed in VPs which have an unanticipated bad grade-of-service, time savings result. We present the network performance in detail, in figures, and compare this with the performance of the network in the absence of VPB control.

关键词： NETWORK PLANNING NETWORK OPTIMIZATION BANDWIDTH control MATHEMATICAL PROGRAMMING VIRTUAL PATH CALL BLOCKING PROBABILITY ATM

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Dvelopments in the Field of control Libraries and their Impact on control Eduction

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IFAC Proceedings Volumes 1994年第9期27卷 269-272页

作者： Ad Van Den Boom Aloys Geurts Georg Grübel Andras Varga Dept. of Electrical Engineering Eindhoven University of Technology NL-5600 MB Eindhoven The Netherlands Dept. of Mathematics and Computing Science Eindhoven University of Technology NL-5600 MB Eindhoven The Netherlands DLR-Oberpfaffenhofen Control Design Engineering Institute for Robotics and System Dynamics D-82230 Wessling Germany

The state of the art of control libraries is presented. Attention is paid to the joining of efforts to developing a future mature control library based on the two existing libraries in active development RASP and SLIC... 详细信息

关键词： control libraries computer aided system design numerical control software education educational aids

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Fault Detection of Large Parameter Changes in a Wastewater Plant

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IFAC Proceedings Volumes 1994年第5期27卷 153-158页

作者： M.J. Fuente P. Vega M.B. Zarrop Dept. Ingeniería de Sistemas y Automatica. Facultad de Ciencias Universidad de Valladolid C/Prado de la Magdalena S/N 47011 Valladolid SPAIN Control System Centre Department of Electrical Engineering and Electronics University of Manchester Institute of Science and Technology. Manchester M60 1QD U.K.

This report deals with the detection and diagnosis of faults (FDD) when they develop in different parts of a wastewater treatment plant, situated in Manresa, Spain. When a fault occurs estimates of parameters in a non-linear mathematical model of the plant change. Some methods for detection and tracking the values of different parameters are proposed, where only large parameter changes are considered in this work. The methods have a common structure with three basic elements: a basic identification algorithm, a detector of the parameter changes and an adaptive procedure for improving the tracking capability of the identifier. A set of simulation experiments are presented in order to compare them.

关键词： Fault Detection and Diagnosis biotechnology wastewater plant estimation algorithms RLS

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An improvement of the iterative harmonic analysis method

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European Transactions on Electrical Power 1993年第2期3卷 163-170页

作者： De Martinis, U. Fantauzzi, M. Testa, A. Dr. Umberto De Martinis (1944). AEI received his degree in Electrical Engineering from the University of Naples/Italy in 1974. He is an Associate Professor in Electrical Power Systems at the Department of Electrical Engineering of the University of Naples. His research interest are on AClDC industrial power systems and HVDC power transmission systems. He is a member of the IEEE Power Engineering Society. (University of Naples Dept. 6f Electrical Engineering via Claudio 21 1-80125 Naples Italy T +3981/768 3215 Fax +3981/768 3223) Dr. Maurizio Fantauzzi (1959) AEI received his degree in Electrical Engineering from the University of Naples/Italy in 1986. In 1986 he joined Ansaldo Trasporti s.p.a. working in the Research & Development unit. In 1988 he joined the Department of Electrical Engineering of the University of Naples where at present he is Assistant Professor. He is involved in researches in the field of power system harmonic analysis. (University of Naples Dept. of Electrical Engineering via Claudio 21 1-80 125 Naples Italy T + 3981/768 3503 Fax + 3981/768 3223) Dr. Alfredo Testa (1950) AEI received his 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 system reliability and harmonic analysis and a member of the IEEE Power Engineering Society. (University of Naples Dept. of Electrical Engineering via Claudio 21 1-80125 Naples Italy T +3981/768 3504. Fax +3981/768 3223)

The paper proposes an iterative method as a possible improvement of the classical power system harmonic analysis method known as IHA (Iterative Harmonic analysis). Such improvement is indicated when convergence problems occur as consequence of supply system resonances, low short‐circuit ratios or strong interactions in the operation of non‐linear devices. The iterative method proposed is described and then some considerations on its accuracy and computational efficiency are carried out. Finally numerical experiments referring to single converter as well as multi‐converter installations are reported to show the applicability and the usefulness of the iterative method proposed. Copyright © 1993 John Wiley & Sons, Ltd.

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Measurements of power and current components in unbalanced and distorted three‐phase systems

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European Transactions on Electrical Power 1993年第1期3卷 75-83页

作者： Andria, G. Salvatore, L. Savino, M. Trotta, A. Dr. Gregorio Andria (1956) AEI received the M. S. degree in Electrical Engineering from the State University of Bari/Italy in 1981 and the Ph. D. degree in Electrical Engineering in 1987 from the same University. From 1981 to 1983 he was working in the Electrotechnics and Electronics Department of the University of Bari as a member of the research team on electrical measurements. From 1984 to 1986 he was a Doctoral Fellow and currently he is a researcher in the same department. His research interests are in the fields of electrical and electronic measurements on components and systems including digital measurements for the analysis of electrical quantities in non-sinusoidal systems and the design of integrated optical sensors for measurement and control of non-electrical physical quantities. (Department of Electrotechnics and Electronics Faculty of Engineering polytechnic of Bovia E. Orabona 4 1-70125 Bari. Italy T +3980/242266 Fax + 3980/242410) Prof. Luigi Salvatore (1945) AEI received the degree in electrical engineering from the University of Bari/Italy in 1970. Since 1976 he has worked in the Electrotechnical and Electronic Department of the same University as a member of the research team on electrical machines. From 1983 to 1987 he was a researcher of electrical machines in the same department. Since 1987 he has been an Associate Professor of electrical machines at the University of Bari. At the present time his research interests include the control monitoring and diagnostics of AC drives and the areas of signal processing anddigital measurements on power electronics systems. (Department of Electrotechnics and Electronics Faculty of Engineering Polytechnic of Bari via E. Orabona 4 I-70125 Bari Italy T + 3980/242258 Fax + 3980/242410) Prof. Mario Savino (1947) AEI received the degree in Electrical Engineering from the University of Barif Italy in 1971. Since then he has been working in the Electrotechnical Institute of Bari until 1973 as researcher from 1973 to 1982 as Assistant Profe

The paper deals with the instantaneous power theory in three‐phase circuits by using the instantaneous time phasors of voltage and current. Particularly it is shown that the instantaneous components of the current time‐phasor in a rotating reference frame p‐q, oriented in such a way that the instantaneous voltage time‐phasor points to the p‐axis direction, represent the active and reactive currents. These components give rise to instantaneous real and imaginary powers, respectively. The spectral analysis of the above‐mentioned time‐phasors gives the harmonic symmetrical components of positive and negative sequence of voltage and current three‐phase systems. The line‐by‐line product of the voltage sequence spectrum by the complex conjugate of the current sequence spectrum gives the DC components of the instantaneous real and imaginary powers. The paper shows also that the instantaneous active and reactive currents are different from those defined on grounds of the Fryze's theory, which can be determined from the voltage and current sequence spectra. Copyright © 1993 John Wiley & Sons, Ltd.

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SIMULATION AND analysis OF STELLENBOSCH-UNIVERSITY SATELLITE (SUNSAT) POWER-system

SIMULATION AND ANALYSIS OF STELLENBOSCH-UNIVERSITY SATELLITE...

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3RD AFRICON CONF ( AFRICON 92 )

作者： BEUKES, HJ DOWSON, KE ENSLIN, JHR Sunsat Power System Dept. of Electrical and Electronic Engineering University of Stellenbosch Stellenbosch 7600 South Africa Analysis Management and Systems(AMS) 44 Ryneveld Str Stellenbosch 7600 South Africa

ISBN: (纸本)0780308352

The University of Stellenbosch is currently developing a low Earth orbit (LEO) microsatellite for communication and mapping purposes. Since this will be the first South-African-developed experimental satellite, the project will also be used to gain new technology for future aerospace and satellite applications. The authors discuss the power system requirements and propose solutions for the power system design on board the satellite. They discusss the simulation and analysis of the power system requirements of the orbiting satellite. Power electronic converters to be used will include maximum power point tracking, battery regulation, bus regulation, and distributed power conversion. The specification and designs of key components, i.e., the solar panels, battery, and regulators, are evaluated against the system requirements during a typical flight path. These simulations include all the different modes of operation of the power system in an orbit cycle. © 1992 IEEE.

关键词： Satellites

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Simulation environment for an autonomous and decentralized multi-agent robotic system

Simulation environment for an autonomous and decentralized m...

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1992 IEEE/RSJ International Conference on Intelligent Robots and systems, IROS 1992

作者： Habib, Maki K. Asama, Hajime Ishida, Yoshiki Matsumoto, Akihiro Endo, Isao Control and System Eng. Dept. University of Technology Baghdad Iraq Institute of Physical and Chemical Research Chemical Engineering Lab. Hirosawa 2-1 Wako-shi Saitama351-01 Japan Information Network System Operation Center University of Tokyo Japan Dept. of Mechanical Engineering Faculty of Engineering Toyo University Japan

ISBN: (纸本)0780307372

An autonomous and decentralized system called ACTRESS (ACTor based Robot and Equipment Synthetic system) is being under development as an intelligent robot system which can execute high level tasks. ACTRESS is composed of multiple robotic agents. Each robotic agent is called "robotor". A robotor may be a robot, a computing system and any other equipments. While researching in this field, many research issues need to have solutions, such issues may include, the communication among the agents and protocols, cooperation among a group of' agents, describing the tasks to be executed, multi-agent motion planning, multi-agent task planning, task description, human interface role, solv ing deadlocks ... etc. The aim or this paper Ls to develop a simulation environment for an autonomous and decentralized multi-agent robotic system. For this purpose, it is necessary to simulate and analyze the main functions of each agent, design and analysis of the actions to be carried out by each agent, analyzing their real time behavior with a variety of situations considering their environment and the treatment of unexpected events. Also, it is necessary to find out an efficient strategy to realize effective means for the agents to form a cooperating manner that support task execution and problem solving. In parallel with the mentioned purposes the ACTRESS structure is simulated as functions and behavior using the developed simulation environment. This simulation includes a roup of mobile robots, human interface and global environment manager. Then, software integration that deal with various aspect of the overall problem is developed. Different experiments are performed to analyze the performance or each individual robotor and the overall system. © 1992 IEEE. All rights reserved.

关键词： Intelligent robots

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Nissan's new "high-drivability" vibration control system

Nissan's new "high-drivability" vibration control system

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作者： Abe, Toshiro Fujiwara, Yasuhiko Minami, Hideki Hashimoto, Atsunori Atago, Takeshi Nakazawa, Shinsuke ESTECH Corp. Japan Simultaneous Engineering Center Nissan Motor Co. Ltd. Japan Chassis Experiment Dept. Chassis Experiment Section Nissan Motor Co. Ltd. Japan Engine Experiment Dept. Pert. Experiment Section Nissan Motor Co. Ltd. Japan Sawa Works Powertrain Control System Design Dept. Hitachi Ltd. Japan Engine Design Dept. Nissan Motor Co. Ltd. Japan

Attenuation of fore and after vehicle vibration caused by transient throttle pedal maneuvering is a key factor in achieving a good drivability. The dynamics of this vibration is analyzed considering torque generated by combustion as the exciting force. The relationship between vibration attenuation and improvement of drivability is determined using a subjective, low frequency vibration test. Through these analyses and tests, a new vibration control system is developed which controls the above noted torque by providing optimum adjustment of ignition timing. Decreasing fore and after vehicle vibration without adversely affecting vehicle performance, this control system improves drivability in both FF and FR cars by more than 1.0 evaluation point.

关键词： Vehicle performance

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The nippondenso electronic control system for the diesel engine

The nippondenso electronic control system for the diesel eng...

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International Congress and Exposition

作者： Murayama, Fumiaki Tanaka, Yasushi Ito, Shigehiko Engine Control System Engineering Dept. Nippondenso Co. Ltd. Japan Electronics Engineering Dept. Nippondenso Co. Ltd. Japan

This paper describes the methods of operation and functions of advanced fuel injection controls, and the results of engine testing for the "Learning control", a function which was developed to control diesel engines that makes the most of the flexibility found in software used for electronic control. In-dept. of study of the "Learning control" function, confirms that this function can provide stability in engine performance by automatic compensating for injection quantity deviation in fuel injection pump operation. This paper also outlines concepts for insuring the safety of system operation during the "Learning control" stage. Copyright © 1988 Society of Automotive Engineers, Inc.

关键词： Diesel engines

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