Abstract: In the actual technological context, continuous improvement of the evaluation of the electromagnetic disturbances injected by the large electrical end users and the distribution system topology into high voltage networks is highly necessary. The disturbances phenomena occurring in the high voltage network due to some important 110 kV and 220 kV and users behaviour could have different aspects must be examined.

We can discuss about the identification of the disturbances by measurements in electric substation of 400kV-220kV-110kV and also their real level. The measurements generally point out one or several incidents and their cumulative effect upon the disturbances.

The disturbance phenomena analysis that can be conducted in a power system include the voltage and current which can be evaluated by magnitude of supply voltage, flicker, voltage dips and swell, voltage interruptions, transients, supply voltage unbalance, voltage and current harmonics, voltage inter-harmonics, mains signalling on the supply voltage, voltage rapid changes.

All these electromagnetic disturbances could be part of the concept of ‘power quality” which is applied to a wide variety of electromagnetic disturbances phenomena. Using this concept, all the issues mentioned above will benefit by a system approach rather than handling them as individual problems.

Some of these events can also be predicted, and the conditions which promote the unpleasant events, can to be specified, for instance, a harmonic resonant regime in PC (point coupling) due to a network fault.

To establish if an installation’s emissions are in conformity with the regulations or standards, it is necessary to draw out from the total measured current the one emitted from the system, because the measured current (I) at the PC is the sum of the currents emitted by the customer Ic towards the network and the network towards the customer Is. This method based upon the analysis of the impedance was successfully used in order to evaluate a possible harmonic regime and the limit of harmonic emission; but this method can be applied also in other cases in the future.

In some situations, the flagging concept can be applied, when several simultaneous incidents appear but their identification becomes a complex operation. This is the case of a no concordance between the voltage and current waveform due to an unknown large starting installation witch have to be recorded for the future analysis. This problem will be convenient solved by monitoring equipment, but an important aspect is to establish the location. When power quality problems become evidently it is necessary to locate the monitors as close as possible to the equipment affected by those problems, because the recent advances in signal processing have made possible to design and implement intelligent systems for the analysis of measurement raw data and transform it into useful information.

PLENARY LECTURE 2

Distributed Generators and a New Paradigm of
Power Delivery System

– Demonstrative Projects in Japan –

Professor Koichi Nara

Ibaraki University

4-12-1, nakanarusawa, Hitachi

Ibaraki, JAPAN

E-mail: nara@mx.ibaraki.ac.jp

Abstract: Recently, as prices of distributed generators are being reduced, a lot of such distributed generators as solar cells, fuel cells and small scale co-generation systems, etc. is being connected to power distribution systems. The protection coordination problems and voltage problems are expected to be arisen when many distributed generators are connected to power distribution systems. Therefore, to prevent the above deficits, several concepts of new type power delivery systems are proposed in world wide: such as MicroGrid, Power park, FRIENDS, Virtual utility, Virtual power plant, Smart Grid, etc. In this presentation, the problems caused by distributed generators are reviewed, and several new type power delivery systems are introduced. Since several national projects are running relating to the distributed generators and the new type power delivery systems in Japan, some of these projects are briefly presented. Finally, a future estimate by the front line engineers and scientists is shown about the state-of-the-arts technical developments of the relating technologies to the new type power delivery system.

PLENARY LECTURE 3

Employment of Power Semiconductor Converters
in Hybrid Drives

Professor Jiri Lettl

Department of Electric Drives and Traction

Faculty of Electrical Engineering

Czech Technical University in Prague

Technicka 2, 166 27 Prague 6

CZECH REPUBLIC

E-mail: lettl@fel.cvut.cz

Abstract: The presented lecture deals with power semiconductor converters employable in hybrid drives. Hybrid vehicles are equipped with two different energy sources: with a fuel tank for the internal combustion engine, and with electric battery for the electric motor. The internal combustion engine propulsion system is advantageous for the inter-city transport, and the electric propulsion system is more suitable for city transport where internal combustion engine would be uneconomical for low power and frequent idling. There are various types of hybrid drives. Promising is propulsion with electric power splitting based on internal combustion engine power splitting into two parts. One part is converted into electric power in a generator, which supplies a traction motor, mechanically connected to vehicle wheels, and the remaining part is transmitted by electromagnetic forces in the air gap to the wheels mechanically without losses in electric machines. The splitting devices can be realized mechanically by a planetary gear or electrically by a special electric generator. To treat the electrically transmitted part of the whole hybrid drive power, an indirect frequency converter or a matrix converter can be used. A special DC/DC converter is being used to accumulate the braking energy in a super capacitor.

SPECIAL SESSION: Grid Integration of Renewable Energies
Organised and Chaired by Prof. Harald Schwarz , University of Technology Cottbus, Germany.

Comparison between frequency-matched and true sine wave grid-connected photovoltaic modules	Cuauhtemoc Rodriguez, Gehan A.J. Amaratunga	517-123
Integration of Renewable Energies to the East German Grid-Actual Problems and Possible Solutions	Harald Schwarz, Klaus Pfeiffer, Lars Roskoden	517-337
Optimization of Generation and Distribution Expansion in Microgrid Architectures	Joydeep Mitra, Shashi B Patra, Mallikarjuna R Vallem, Satish J Ranade	517-600

SESSION: Modelling and evaluation techniques for Power Systems

Chair: E. Melgoza, Jan K. Sykulski

Evaluation of the Proximity Effect upon the Impedance Characteristics of Subsea Power Transmission Cables	Chang Hsin Chien,Richard Bucknall	517-278
Modeling an arcing high impedances fault Based on the physical process involved in the arc	Naser Zamanan,Jan K. Sykulski	517-413
Performance evaluation of cogeneration systems: an approach based on incremental indicators	Gianfranco Chicco,Pierluigi Mancarella	517-455

SESSION: Energy and Power Systems

Chair: Minjiang Chen, Camelia Petrescu

The effects of air conditioner load on voltage stability of urban power system	Bei Wu, Yan Zhang, Minjiang Chen	517-147
Bifurcation Lines Calculations of Period-1 Ferroresonance	Fathi Ben Amar, Rachid Dhifaoui	517-169
Design Of Subsynchronous Resonance Protection And Reduction Of Torsional Interaction In Power Systems	Mahdi Hedayati	517-202
Remote Data Acquisition System for Hydro Power Plants	Costin Cepisca, Horia Andrei, Emil Petrescu, Cristian Pirvu, Camelia Petrescu	517-273
Handling Infeasibilities when Applying Benders Decomposition to Scheduling Optimization	C. Yuen, A. Poncet, X.Y. Chao	517-293
Outdoor lighting using renewable energy sources	Constantinos A. Bouroussis, Iason Georgaris, Frangiskos V. Topalis	517-630

SESSION: Simulation Techniques in Power Systems

Chair: Manuel Casteleiro, Maria Calado

Numerical simulation of earthing grids	Ignasi Colominas, Fermin Navarrina, Manuel Casteleiro	517-152
A New Methodology for Dynamic Performance Simulation of a New Linear Switched Reluctance Motor based on Geometrical Dimensions	Davide Fonseca, Carlos Cabrita, Maria Calado	517-162
A study on the power system restoration simulator	Heungjae Lee, Seongmin Park, Kyeongseob Lee, Taekyun Kim, Jeonghoon Shin, Injun Song	517-188
Reliable, Effective and Efficient Operation of DG Source for Power Flow Control in Coordination with Main Utility Network at Common Load Bus Using Static Device	Aamir Hanif, Mohammad Ahmad Choudhry	517-484
Integrating Virtual Power Producers into MASCEM Simulator	Isabel Praça, Carlos Ramos, Zita Vale	517-582
Dynamic Model Identification of Induction Motors using Intelligent Search Techniques with taking Core Loss into Account	Boonruang Marungsri, Nittaya Meeboon and Anant Oonsivilai	517-602

Saturday, September 23, 2006

SESSION: Computational and Artificial intelligence for Power Systems

Chair: Ryuichi Yokoyama, Shahram Javadi

Artificial neural networks used for failure diagnosys in ZnO arresters	Estacio Tavares Wanderley Neto, Edson Guedes Da Costa, Marcelo Jose De Albuquerque Maia	517-392
Electrical and Thermal Properties of NiCd Battery for Low Earth Orbit Satellite's Applications	M. Zahran, A. Atef	517-223
A Multi-objective Model for Sizing and Placement of Distributed Generation	Vasco Santos, Antonio Martins, Carlos Antunes	517-167
Prediction of Balancing Energy in Wind Generation using Probabilistic Weather Forecasting	László Varga, Zoltán Korényi, Tamás Hirsch	517-221
Novel price prediction by using neural network under large volatility in electric power exchange	Yoshitaka Ohta, Yohei Tani, Junjiro Sugimoto, Ryuichi Yokoyama	517-371
Ant Colony Based Optimization Technique for Voltage Stability Control	Mohd. Rozely Kalil, Ismail Musirin, Muhammad Murtadha Othman	517-613
Software Development for Optimum Allocation of Power System Elements Based on Genetic Algorithm	Shahram Javadi	517-242
A Knowledge Based Expert System to Optimum Design of Distribution System	Hossein Najafi, Shahram Javadi	517-443

SESSION: Advanced Power Systems Technology and Applications

Chair: Raluca Rosca, Alain Poulin

Evaluation of the first micro combined heat and power for social housing in Belgium	Johan Van Bael, Eefje Peeters	517-305
Evaluation of electromagnetic disturbances injected in high voltage networks by large electrical installations	Marilena Ungureanu, Adrian Constantin Rusu, Raluca Rosca	517-324
Application of resistive high temperature superconducting fault current limiters in power-station service plant	Klaus Pfeiffer, Harald Schwarz	517-338
Investigation and Mitigation of the Amplification of the Harmonic Current to the Filtering System of an Aluminum Smelter	Alex Takashi Yokoyama, Maria Emilia De Lima Tostes, Carminda Celia M. De Moura Carvalho, Andre C. Nascimento, Pedro Paulo C. Souza, Afonso Henrique J. Paz Bittencourt, Giordani L. Tavares, Luiz Antonio C. Lopes	517-366
Usability of mining machinery to improve efficiency of an electric shock protection in MV power network	Bogdan Miedzinski, Zenon Okraszewski, Stanislaw Szkolka, Andrzej Szymanski	517-350
Microturbine economics in commercial and institutional buildings	H. Nesreddine, M. Dostie, J. Millette, A. Poulin, L. Handfield	517-360
Study on Leakage Current Characteristics of Epoxy Resin for Outdoor Insulators	Suwarno, Sigit K. Ardianto	517-451
Alternative Methods of Simultaneous Production of Electrical and Thermal Energy	Dieter Gerling, Marcin Pyc	517-511

SESSION: Computational Engineering for Power Systems Applications

Chair: Ryuichi Yokoyama, Marcio V. P. de Alcantara

A New Algorithm for Unit Commitment Based on On/Off Decision Criterion	Hui Zheng, Bei Gou	517-116
Efficient Evaluation of Nodal Reliability Index based on AC-OPF by Fast Monte Carlo Method	Suguru Fukutome,Ryuichi Yokoyama	517-315
A Novel Optimal Power Flow for Real-time Application	Koichi Nara, Taiji Satoh, Takashi Mitani	517-326
Efficient Allocation of SVRs Optimizing the Rate of Operation for Distribution Systems	Junjiro Sugimoto Ryuichi Yokoyama	517-368
A New Approach for Optimal Capacitor Placement in Distribution Systems	Diego Issicaba, Arlan Luiz Bettiol, Jorge Coelho, Marcio V. P. de Alcantara	517-530
IEEE Standard 519-1992 Application in Industrial Power Distribution Networks with a New Monitoring Approach	Joao Pedro Trovao, Paulo Pereirinha, Humberto Jorge	517-615
An Improved Heuristic Approach for Conductor Size Selection in Planning of Branched Radial Feeder Distribution Systems	Damanjeet Kaur and Jaydev Sharma	517-617

SESSION: Control Theory and Advanced Automation for Power Systems

Chair: Maurice Fadel, Jan Murgas

Smart control system for LEDs trafffic-lights based on PLC	Ramón Martínez-Rodríguez-Osorio, Miguel Calvo-Ramón, Miguel Á. Fernández Otero, Luis Cuellar Navarrete	517-357
Speed sensorless induction motor control using extended complex Kalman filter and spiral vector model	Mohamed Menaa, Omar Touhami, Rachid Ibtiouen, Maurice Fadel	517-198
Electronic Control of a Four Stroke Internal Combustion Engine	Carla S. da C. Goncalves, Bruno A. F. Neves, Antonio E. V. Espirito Santo, Francisco M. P. Brojo, Maria do Rosario A. Calado	517-216
The Turbogenerator Predictive Control	Marian Mrosko, Eva Miklovicova, Jan Murgas	517-300
Application of EKF to Parameters Estimation for Speed Sensorless and Neural Network Control of an Induction Motor	Krim Yazid, Rachid Ibtiouen, Omar Touhami and Maurice Fadel	517-310
Design of sliding mode stabilizer for wind turbine generator using dynamic compensation observer technique	Issarachai Ngamroo	517-336

Sunday, September 24, 2006

SPECIAL SESSION: New Solutions in Energy Generation and Transaction

Organized and Chaired by Prof. Zita A. Vale, Polytechnique Institute of Porto, Portugal

Producers and Virtual Power Producers	Hugo Morais, Marilio Cardoso, Luis Castanheira, Zita Vale, Isabel Praca	517-091
Use of Data Mining Techniques to Characterize MV Consumers and to Support the Consumer-supplier Relationship	Sergio Ramos, Zita Vale, Joao Santana, Fatima Rodrigues	517-092
Firm Transmission Rights and Congestion Management in Electricity Markets	Judite Ferreira, Zita Vale, Jose Cardoso	517-093
Optimal Location of Natural Gas Sources in the Iberian System	Teresa Nogueira, Rui Mendes, Zita Vale, Jose C. Cardoso	517-094

SESSION: Power Market Liberization and Power Management

Chair: Ryuichi Yokoyama, Daniel Llarens

Power market congestion management incorporating demand elasticity effects	T. S. Chung, D. Z. Fang, X. Y. Kong	517-282
A new methodology to assign congestion costs on meshed networks	Daniel Llarens	517-333
Auction-based market coupling – integrating the exchange and bilateral markets	Andraž Šavli, Borut Rajer, Tomaž Lajovic	517-345
Economic Evaluation and Scenario Analysis of Wind Generations Based on Environment Factors	Y Tsukamoto, Junjiro Sugimoto, Ryuichi Yokoyama, Yicheng Zhou	517-387
Market splitting algorithm for congestion management in electricity spot market	Marta Marmiroli, Masahiko Tanimoto, Yukitoki Tsukamoto, Ryuichi Yokoyama	517-548

SESSION: Power and Energy Systems Technology and Experimentation

Chair: Antonio Espirito Santo, Célyn Le Bel

A Digital Filter Design for Digital Re-Sampling in Power System Applications	Qing Zhao, Yifang Hsu, Bei Gou	517-117
Some Design Aspects of the Commutator Series Motor Operating in Both Direct Current and Single-Phase Electric Traction. Part 2-Design of the Main Field Winding Shunt Resistor and Smoothing Coil	Carlo Cabrita, Davide Fonseca, Maria Calado, Antonio Espirito Santo	517-164
A Frequency Domain Transformer Model for Simulating Fast Transient Overvoltages	V. Venegas, A. Gonzalez, J.L. Guardado, E. Melgoza	517-379
Short-circuits at 25 kV, 50 Hz contact line system of Czech Railways	Radovan Dolecek, Ondrej Cerny	517-171
High efficiency high speed pm motors for the more electric aircraft	Roy Perryman, Landson Mhango	517-225
Dissolved Gas Analysis of Transformer Oils: Effects of electric arc	Suwarno	517-461
Power demand of programmable thermostats with a built-in pick-up algorithm for electric baseboard heaters	Louis Handfield, Hakim Nesreddine, Célyn Le Bel	517-564
Study on New Display System using Windmill and Light Emitting Diode	Kazuto Yukita, Tomoiko Ichikawa, Tadashi Hosoe, Yasuyuki Goto, Katsuhiro Ichiyanagi	517-605
Universal Sequencer for a Four-Phase Unipolar Stepper Motors	Gheorghe Baluta, Nikolaos Papachatzis	534-660

SPECIAL SESSION: Power Quality and Application of Power Electronics Techniques in Transmission and Distribution Systems

Organized and Chaired by: Dr. Han Huang, New York Power Authority, Transmission Business Unit, USA

Modulation Techniques for Three-Phase Four-Leg Inverters	Armando Bellini, Stefano Bifaretti	517-139
Realized Matrix Converter PWM Strategy for Hybrid Drive System	Jiri Lettl	517-291
Power Quality Measurements - Considerations at Electronic Data Processing Centres	Michael Mann, Bernd Gutheil, Paul Weiss, Dirk Wilhelm	517-144
Some Design Aspects of the Commutator Series Motor Operating in Both Direct Current and Single-Phase Electric Traction. Part 1- Commutation Analysis and Transformer E.M.F.	Carlo Cabrita, Davide Fonseca, Maria Calado, Antonio Espirito Santo	517-163
Harmonic Distortion Produced by Synchronous Generator in Thermal - Power Plant	Zaneta Eleschova, Anton Belan, Martin Mucha	517-306
Blackouts: description, analysis and classification	Wei Lu, Yvon Bésanger, Eric Zamaï and Daniel Radu	517-308
Classification of Signals with Voltage Disturbance by Means of Wavelet Transform and Intelligent Computational Techniques	Raimundo Nonato M. Machado, Ubiratan H. Bezerra, Evaldo G. Pelaes, Roberto Célio L. De Oliveira, Maria Emilia De Lima Tostes	517-374