Abstract: The latter half of the 18th century, Galvani’s famous experiment and Volta’s subsequent insight, marked the beginning of two branches of science that were to change the human life radically. Later on, the two new branches, namely electrology in physics and electrophysiology in medicine, although started together, followed different paths. On the one hand electrical engineering, electronics, and information technologies developed whereas on the other hand evolved electrophysiology, electrical and electronic diagnostics, and digital medical engineering. As a matter of fact, in the past but also in recent years there have been remarkable advancements in electrophysiology. The changes in the electric potential due to biological activity are acquired outside the body and can identify any normal or abnormal behavior of organs such as the heart (electrocardiogram), the muscles (electromiogram), the brain (electroencephalogram), the eyes (electroretinagram). The present trend seems to be pointing towards a sort of reunification of the two original branches, which will probably return to walk together, as the recent developments in bionics and in neural networks strongly suggest. Nowadays the investigation of these fields has just started, but even so a number of analogies have been discovered between the operation of an information processing system and the behavior of the human nervous system. As a direct example, in both cases the exchange of information takes place by means of a binary code, as can be seen in the electrical behavior of a single cell. Nevertheless, in certain cases an external electrical current passing through the human body can deeply alter vital functions, and have devastating if not lethal effects. The different issues are discussed through a unifying theory, which takes together both the electrical and biological aspects, highlighting the specularity of the two phenomena.

PLENARY LECTURE 2

Analytical modelling and investigation of the adjustable speed drive

performance under input voltage unbalance

Professor Jiri Klima

Dean of the Technical Faculty of CZU in Prague

Czech Republic

E-mail: [email protected]

Abstract: Adjustable speed drives are widely used in industrial applications as the most efficient means of achieving motion control.Input voltage unbalance and sag conditions can have serious consiquences on performance of induction motor drive.

One of the most harmful performance effect is torque pulsation (ripple torque) that are dominated by the second harmonic of the input line frequency (50 or 60 Hz). The paper presents the mathematical model enabling the closed-form solution of the motor currents and electromagnetic torque under this unbalance input voltage. The model is based on the mixed p-z approach. The analytical results can be used as a valuable design tool evaluating the impact of input voltage unbalance.

PLENARY LECTURE 3

Wind Power and the Impact on Power Systems

Professor Terje Gjengedal

NTNU & Statkraft

P.O.Box 200, Lilleaker, 0216 Oslo, Norway

E-mail: [email protected]

Abstract: Wind Power is among the fastest growing energy source in the world. In most systems, the amount of wind power integrated into large scale electrical power systems only covers a small part of total power systems load. With a low wind power penetration, system impacts are normally small and wind turbines normally do not take part in voltage and frequency control and if a disturbance occurs, the wind turbines are normally disconnected and reconnected when normal operation has resumed. That is, frequency and voltage are maintained by controlling the large power plants as would be the case without wind turbines present.

In systems with a large portion of wind power the wind turbines and wind electric system may begin to influence overall power system behaviour, making it difficult to operate by only controlling large scale power plants. Therefore, when considering establishment of large wind power plants, several questions must be clarified. This includes transmission capacity, frequency and voltage stability, frequency control and reserves, and in some cases also flicker and harmonics. Detailed system and design studies must be carried out in order to find the best technical-economical solution for dealing with these issues. Large scale wind power may also bring substantial operational effects due to balance management and reserve impacts.

Therefore, grid codes are now developed that defines the dynamic and static requirements wind turbines must meet in order to be connected to the grid. These requirements may in some cases be troublesome and difficult to fulfil. Examples on such requirements are capabilities of contributing to frequency and voltage control by continuous modulation of active power and reactive power supplied to the transmission system.

The speech will discuss these issues with the main focus on system operation, control and stability and it will be related to the abovementioned issues of system integration, power system impacts and future grid code requirements. It will provide a structured presentation of the principles, status and experiences of wind power in power systems. Examples and experiences will be discussed and presented.

SESSION: Electrical Distribution Systems
Chair: Francesco Muzi, Heungjae Lee

A new FMECA model for reliability computations in electrical distribution systems	Francesco Muzi	541-257
Detection system of faulty ground wires from aerial video of transmission lines with consideration of influence of devices on ground wires	Ishino Ryuichi	541-174
Development of advanced restoration expert system for 154kV distribution substation	Heungjae Lee, Seongmin Park, Chanho Lim	541-220
Application of worth of supply in distribution systems' planning	L. Ekonomou, T.I. Maris	541-249
Sensitivity study of well-being based reliability worth for different customer outage cost functions in subtransmission systems	R. Gupta, L. Goel and M. F. Ercan	541-299
Ubiquitous Sensor for Supervision of Lightning Arresters	Gyung-suk Kil, Jae-yong Song, Il-kwon Kim, Seung-bo Moon	541-430
Voltage Sensitivity Analysis in MV Distribution Networks	Stefania Conti, Andrea Maria Greco, Salvatore Raiti	541-533
Power flow simulation and visualization of autonomous MicroGrids	Martin Wolter	541-410 p.p40-45
Distribution systems’ reliability increase using a cost-benefit decision-making process	T .I. Maris, K.M. Sideris, S.SP. Pappas, L. Ekonomou	541-250

SESSION: High Voltage Electric Power Network

Chair: Yasar Birbir, Nicolae Muntean

Modification of a PEF Source that Produce both Wide and Narrow Pulses	Serkan Elver, Yasar Birbir	541-404
Realisation of Principle of Power Deliveries Settlement for Large Scale High Voltage Electric Power Network	Martins Kalnins, Anatoly Mahnitko	541-332
Study of an electrooptic sensor for high voltage measurements	J. C. Santos, J. Rubini Jr, L. Pinheiro C. Silva, J. C. J. Almeida, N. M. Abe, A. Passaro	541-185
Investigation of the Harmonic Distortion Generated by Adjustable Speed Drives	Nicolae Muntean Alexandru Hedes Sever Scridon	541-204
High voltage use in environmental application	Vlk Rostislav, Milan Krasl	541-490
Development and Analysis of New Type of Switchgear for High Voltage Gas Circuit Breaker	Jong-Ho Kang, Sang-Min Choi, DONG En-yuan, Hong-Kyu Kim, and Hyun-Kyo Jung	541-541

SESSION: Synchronous, Asynchronous and Induction Motors

Chair: Caner Akuner, Janne Nerg

Expression of the magnetic flux distribution in squirrel caged induction motors by means of simulation program	Ismail Temiz, Caner Akuner	541-337
A New visual basic control strategy for hybrid step motors for educational and industrial applications	Durmus Uygun, Caner Akuner	541-338
Artificial Neural Network to Improve Speed Control of Permanent Magnet Synchronous Motor	A. Nait Seghir, M. S. Boucherit	541-172
Effect of odd number of rotor slits on the performance of a high-speed, high-power, solid-rotor induction motor	Janne Nerg, Tuomo Aho, Juha Pyrhönen	541-195
An analytical model and investigation of induction motor drive fed from three-level space vector modulated VSI	Jiri Klima	541-288
Direct Torque Control of Permanent Magnet Synchronous Motor (PMSM) - an approach by using Space Vector Modulation (SVM)	Sanda Victorinne Paturca, Mircea Covrig, Leonard Melcescu	541-437
Analysis and Design of a Small Size Rotary Ultrasonic Motor	Jong-Seok and Hyun-Kyo Jung	541-427
A Digital Speed Control Application on the Universal Motor with PIC Microcontroller	Yasar Birbir, Musa Yilmaz	541-405
Stabilization of Wind Farm Output with Doubly-fed Asynchronous Machine	Li Wu, Z.X. Wang, Junji Tamura	541-548

Sunday, December 17, 2006

SESSION: Measurements, Estimations and Predictions in Power Systems

Chair: Vaos Pavlika, Gyung-suk Kil

Fuzzy Linear Regression Approach for Uncertainty Modeling in Power System State Estimation	A. K. AL-Othman, N. H. Abbasy	541-330
Calculation of the Magnetostatic Field associated with thick Solenoids in the Presence of Iron using a Maclaurin Series expansion and Legendre’s Complete Elliptic Integrals of the 1st and 2nd kind	Vasos Pavlika	541-392
Design and Fabrication of a PD Measurement System for Dielectric Test of Low-voltage Electrical and Electronic Devices	Gyung-suk Kil, Jae-yong Song, Il-kwon Kim, Seung-bo Moon	541-400
Detection and analysis of time-varying harmonics in power systems using wavelet analysis	Julio Barros, Ramón I. Diego	541-477
Rotor fault detection: a comparison between diagnosis techniques using a hall effect sensor	Dias C.G, Chabu I.E.	541-482
Cost worth evaluation of reliability centered maintenance for electrical equipment in a chemical plant	Seiichi Itakura, Satoru Niioka, Ryuichi Yokoyama	541-519
Short circuit current forecast based on improved BP artificial neural network combined with genetic algorithm	Bo Liu, Yan Zhang, Yu Chen	541-150
Forecasting to Time Variation of Wind Power by using Weather Map and AMeDAS data	Katsuhiro Ichiyanagi, Kengo Taniguchi, Kazuto Yukita, Yasuyuki Goto, Katsunori Mizuno, Yukio Hoshino, Nobuyuki Yamamoto, Sigeyuki Sugimoto	541-214

SESSION: Electric Machines

Chair: Damijan Miljavec, Caner Akuner

Grid connection of the Doubly-Fed Induction Machine without position sensor	I. Kortabarria, I. Martínez de Alegría, J.Andreu,J. L. Martín, J.L. Villate	541-186
A Method for the Modeling and Analysis of Permanent Magnet Synchronous Machines	H. Tarik Duru	541-492
Comparative Analysis of the Magnetic Pole Operation of a Conventional Synchronous Machine and a Synchronous Machine Constructed According to the Slot Cutting Conception	Kazimierz Ziolko	541-229
Simultaneous Stabilization of Multimachine Power System Using Genetic Algorithm Based Power System Stabilizers	Manisha Dubey, Aalok Dubey, Nikos E. Mastorakis	541-248
Stator Faults in Induction Machine and its influence on the vector control	Boukhelifa Akila, Fiala Bachir, Ibtiouen Rachid, Touhami Omar	541-275
Calculation of Induced Eddy Currents in Permanent Magnets of BLDC Machine	Damijan Miljavec, Bogomir Zidaric	541-258
A Study of different air gaps on the effect of torque and efficiency in induction machines	Ismail Temiz, Caner Akuner	541-336
Investigation Of The Dynamic Behavior For A Weak Energy Grid Including WECS By The Interruption Of The Diesel Machine's Operation	Evangelos Tsimplostephanakis and Athanassios Safacas	541-387

SESSION: Advances in Power Systems I

Chair: Nicolae Muntean, Gyung-suk Kil

A Novel Transformer with Ability to Suppress Conducted Interference	Zongxiang Chen, Pengsheng Ye, Junmin Pan	541-349
Multi-Objective Generation Dispatch Using Particle Swarm Optimisation With Multiple Fuel Option	C. Rani, M. Rajesh Kumar, K. Pavan	541-166
Control of Three-Phase Pulse width Modulation Voltage Rectifier	R. Guedouani, B. Fiala, E. Berkouk, M. S. Boucherit	541-213
Practical Aspects Regarding Implementation of Variable Speed Drives in Cooling Tower Fans	Nicolae Muntean, Alexandru Hedes, Sever Scridon	541-203
Application of ANN to the control by elimination harmonics of a seven level voltage inverter	Imarazene Khoukha , Chekireb Hachemi and Berkouk El Madjid	541-182
Contribution to the controling of the shunt active power filter to compensate for the harmonics, unbalanced currents and reactive power	Tarik Jarou, Mohamed Cherkaoui, Mohamed Maaroufi	541-189

SESSION: Theoretical Approaches on Power Systems

Chair: Terje Gjengedal, Vaos Pavlika

The Low Loss Winding Theory	Vít Bršlica	541-652
Lyapunov Energy Function for an SMES	Valentin Azbe, Rafael Mihalic	541-335
An Analysis of a Nano Positioning Actuator	Jong-Seok Rho and Hyun-Kyo Jung	541-428
Optimization in Short-Term Operation of Hydro power Systems	Terje Gjengedal	541-151

Monday, December 18, 2006

SESSION: Advances in Power Systems II

Chair: Milan Krasl, Vladimir Ondrejka

Control system for a multiple compressor ice-maker driven by photovoltaic panels	Michael P. Theodoridis and Petros Axaopoulos	541-414
Losses in windings of superconducting traction transformer, 2D and 3D model	Milan Krasl, Rostislav Vlk, Jindrich Rybar	541-488
The excitation systems, simulation and test for dynamics in power systems	J Salinas, Jesús R Pacheco P	541-556
Dielectric spectroscopy in time and frequency domain	Vladimir Ondrejka, Lubomir Turansky, Attila Kment	541-469
Setting stabilyzers in power systems weakly link coupling	Jesús R Pacheco P, J Salinas	541-557

SESSION: Voltage and Matrix Converters

Chair: Mohammadreza Rafiei, Jon Andreu

Direct Power and Torque Control of AC/DC/AC Converter with Induction Generator for Renewable Energy System – Wave Dragon MW	Marek Jasinski, Marian P. Kazmierkowski	541-575
Voltage collapse in low-power low-input voltage converters - A critical comparison	Mohammadreza Rafiei, Teymoor Ghanbari, Ahmad Darabi	541-538
Matrix Converter Active and Passive Protection Strategy Considerations	J. Andreu, I. Martínez de Alegría, I. Kortabarria, U. Bidarte, S. Ceballos	541-180
FPGA Implementation and System-Level Validation of Matrix Converter Space Vector Modulation Algorithm	J. Andreu, U. Bidarte, JL. Martín, A. Astarloa, J. Jiménez	541-181