Winter 2003 PELINCEC Newsletter, No.2 1

POWER ELECTRONICS AND INTELLIGENT CONTROL FOR ENERGY CONSERVATION - CENTRE OF EXCELLENCE

Winter 2003 PELINCEC Newsletter http://pelincec.isep.pw.edu.pl No. 2

Impact of Artificial Intelligence Methods and Models on Engineering Practice

The workshop on Artificial Intelligence Methods and Models

took place in Warsaw during two December days, just at the

beginning of the second decade of that winter month. Apart

from all the administrative matters, the necessity to organize

sessions, where papers were presented, our main and initial

idea was to find out new paths and traps or, if necessary, to

attempt to built certain small bridges between theory and

practice, methodology and experiments, new concepts and

past experience. But a smaller scale the target was to develop

opportunities for new links between those who are a long way

apart, those working upstairs and those staying downstairs

who rarely talk between themselves. We liked to bring

together our colleagues from Warsaw and other Polish cities

and get some stimulation from our European friends.

There is a common feeling that artificial intelligence methods

and models have been successfully present in our scientific

and engineering life for some time now. But fundamental

questions are still being stated and discussed. In our

presentation at least two speakers addressed that type of

questions to the audience.

We are discussing with Prof. Teresa Orłowska-Kowalska the day of birth of multivalued logic

Prof. Teresa Orłowska-Kowalska from Wrocław University

of Technology was talking about artificial intelligence methods

in identification and control of electrical drives. She herself is

a good example of a scientist who is involved in both

theoretical research and practical applications. She attracted

attention of a large number of our Ph.D. students. Her very

engineering-oriented tutorial sparkled a closed-circle

discussion about fundamentals. Coffee break was fulled with

various problems of multivalued logic and its origin. The

comments on historical facts were going back to 1931.

Prof. Bernardete Ribeiro came from the oldest, beautiful and

for long time the only Portuguese University Coimbra. The

University is 100 years older than Polish Jagiellonian

University. Prof. Ribeiro presented an invited paper about

computational intelligence and its applications. The scope of

the term “computational intelligence” used in the paper could

be treated as quite similar to other terms including artificial

intelligence. Let us look at the formulations. “The field of

Computational Intelligence (CI) comprises well established

technologies of neural networks, fuzzy systems, evolutionary

computation and other adaptive and biologically motivated

computational paradigms. The importance of these methods

and the reason for their considerable potential in solving real

world problems lies in their ability to enable or facilitate

intelligent behavior in complex and changing environments.

As such they succeed in problems that have been difficult to

solve by classical mathematics”. Bernardete Ribeiro has an

extended educational interdisciplinary background and

experience from various fields: chemical engineering,

electrical engineering, informatics and bioengineering.

The audience attending the tutorial of Prof. Carlo Cerati

Prof. Carlo Cecati came to join us from L’Aquila University

located in the centre of Italy, just next to Grand Saso. L’Aquila

is a charming, medieval town inhabited by nice people. He

was talking for two hours about passivity based control of

induction motor. The majority of our Ph.D. students attended

this tutorial.

Prof. Tadeusz Kaczorek has presented an invited paper about

relationship between something which can be treated

as electrical engineering fundamentals i.e. the circuits and

believed complicated contemporary theoretical achievement –

the singular compartmental systems. The paper was

presented with passion and accuracy. He finished exactly

on time without looking at the watch.

Our Ukrainian friend Ihor Isayev came to us from Lvov. He

attracted our attention talking about probabilistic analysis of

2 PELINCEC Newsletter, No.2 Winter 2003

stochastic systems. Our Workshop was opened to everybody

and was attended every day by more than 30 people. We had

15 minutes long regular papers, 1 hour long invited papers,

and tutorials - 2 and 2.5 hours long, in total - 20 papers within

two days. Many our colleagues came from Gdynia, Łódź,

Wrocław, and Zielona Góra. The sessions were devoted to

image processing, approximation and control, robotics and

artificial intelligence applications. Many papers were

interesting and inspiring. I would like to mention the one of

Dominik Sierociuk who constructed home made robot (no

name was given to it so far) with infra-red sensors and

navigation algorithm employing Kalman filter (extended!)

navigating around his flat. The computational task was easy

for this little creature just to invert 23x23 matrix occasionally!

Prof. Tadeusz Kaczorek presenting his invited paper

You will be able to read most of the presented papers in our

post Workshop publication in Polish Journal “Przegląd

Elektrotechniczny” (Electrotechnical Review) in this year April

issue.

Workshop dinner

Our Workshop Dinner took place in friendly atmosphere in an

old Polish Manor House which is surrounded by 20-hectare

English style park with a vast pond and situated 12 km from

the centre of Warsaw.

Bartłomiej Beliczyński

Chair of PELINCEC Working Group 3

PELINCEC Seminar on Harmonic Distortion in Power Systems

First seminar organized by Working Group 1 - Power Quality -

was devoted to one of the most actual problems occurred

in electrical power systems supplying more and more

converters which draw from line distorted currents. Opening

the session PELINCEC Director Prof. M. P. Kazmierkowski,

after short introduction gave floor to Prof. Roman Barlik –

head of Working Group 1. The first speaker, which had a

significant contribution to arrange the meeting and preparing

the program, was Professor Zbigniew Hanzelka from

University of Science and Technology – AGH – Krakow. In his

lecture Prof. Hanzelka pointed out the most important

problems of harmonic measurement, phenomenon of inter-

harmonics and some methods of their mitigation. The last

conclusion of Prof. Hanzelka lecture was a message that in

the computer and multimedia era broad development of line

friendly single-phase low power supplies seemed to be one of

the most important goals.

Main seminary speakers (from right) J. Desmet, Z. Hanzelka

and Y. Varetski listening to the seminary opening speech by

M. P. Kazmierkowski

Next presentation provided by team Andrzej Bień and

Krzysztof Duda from Measurement Department AGH –

Krakow showed some sophisticated methods of spectral

analysis used for line current and voltage harmonic distortions

measurement. A very interesting lecture was delivered by

Prof. Jan Desmet from Department P.I.H of Hogeschool West-

Vlaandern, Belgium, showing some important facilities

of distorted voltages with regard to neutral conductor

problems. Also a huge power loses caused by voltage

harmonics in cable of supply line were explained and

underlined. Other practical example of power supply

compensation in case of varying load was presented and

discussed by Prof. Yuri Varetski from Lviv Polytechnic State

University. Finally, another team of Henryk Koseda and Marek

Okasiński from Electrical Power Institute in Gdansk showed

a rich package of harmonic measurements done in high

voltage Polish grid. The seminar was attended by over

60 participants.

Winter 2003 PELINCEC Newsletter, No.2 3

Project Oriented Teaching in Power Electronics and Drives

PELINCEC seminar by Professor Frede Blaabjerg

The Aalborg University in Denmark is known from the experimental teaching

methodologies. From the very beginning (since 1974) Aalborg University has been

carrying out teaching based on problem-oriented and project-based learning. From

the moment the students start studying till they finalize their final project, they work in

teams all the time. In his lecture on December 18, 2003 Professor Blaabjerg at first

presented Aalborg University, Institute of Energy Technology. Next, the general

teaching approach at Aalborg University with special emphasis on the Master

Program taught in English in Power Electronics and Drives was discussed. Of

course, implementation of the project-based learning requires spaces and equipment

for every student. However, it was proved by external evaluators that - in comparison

to conventional universities - graduate of the Aalborg University is better prepared for

team work, solution of new problems as well as for interdisciplinary approach.

Photovoltaic and Wind Energy in Distributed Power

Systems PELINCEC seminar by Professor Frede Blaabjerg

Prof. Frede Blaabjerg presenting his Short Course

In the second part of his activities in Warsaw Professor Blaabjerg presented 4-hours

seminar devoted to “very hot” topic Power Electronics in photovoltaic and wind

energy generation. As we know, the electrical power generation is undergoing a

major restructuring; one aspect being the transition from large power generating

plants to smaller distributed power plants, often based on alternative energy sources.

Distributed Power Generation Units (DPGU) today are mostly based on wind turbine

systems, photovoltaic systems, micro turbines and fuel cells. The power range

of individual units varies from 100 W to 4 MW or more. Common to all installations is

the fact that the DPGUs operate autonomously. However, with a high penetration of

DPGUs into the electric grid, power system stability problems may appear. Power

Electronics is the enabling technology which allows flexible interconnection of

DPGUs to the electric grid. Primary focus in the presentation was on wind turbines

and photovoltaic, including technical development, the use of power electronics and

some industrial examples. Over 40 participants, mainly PhD and MSc students,

attended this Short Course.

PELINCEC

International Advisory Board

Prof. Drago Ban CR

Prof. Giuseppe Buja IT

Prof. Valery Chrisanov RU

Prof. Rik De Doncker DE

Prof. Viliam Fedak SL

Prof. Vladimir Kucera CZ

Prof. Francesco Profumo IT

Prof. Andreas Steimel DE

Prof. Frede Blaabjerg DK

Prof. Carlos Cuoto PT

Prof. Tore Undeland NO

Prof. Zdenek Cerovsky CZ

Prof. Joachim Holtz DE

Prof. Gil Marques PT

Prof. Ion Boldea RO

Prof. Vladimir V.Pilinski UA

PELINCEC

National Advisory Board

Prof. Tadeusz Kaczorek

Prof. Jerzy Klamka

Prof. Marek Hartman

Prof. Teresa Orłowska-Kowalska

Prof. Zbigniew Hanzelka

Prof. Ryszard Tadeusiewicz

Prof. Mirosław Dąbrowski

Prof. Henryk Tunia

Prof. Tadeusz Citko

4 PELINCEC Newsletter, No.2 Winter 2003

Control of Variable Speed Electric Generators: Present Status and

Perspective PELINCEC seminar by Professor Ion Boldea

The Seminar, presented by an excellent speaker Professor Ion Boldea, took place in the seminar Room of the Old Boiler House, Warsaw University of Technology on December 15, 2003. It explored the present status of topologies,

performance, modeling, control and design of variable speed generators including induction, IPM, switched-reluctance, high speed PM, and double-fed induction generators. This extensive presentation showed theoretical and experimental results from literature, industry and from the lecturer's team. The stress was put on control methodologies and their

performance. Vector and direct active and reactive power control was given a special attention for fast and robust sensorless control with four quadrant PWM and 100% active and reactive power delivery converters. Lively discussion with

over 30 participants during and after presentation has proved importance of this topic.

Prof. Ion Boldea visiting the PELINCEC laboratories

PELINCEC seminar announcements

"Sensorless Control of PWM-Inverter-Fed Induction Motor Drives" Prof. Joachim Holtz, University of Wuppertal, Germany Seminar, May 13, 2004 "Power Electronics for Electric and Hybrid Vehicles and Feul Cells" Dr Kaushik Rajashekara, Delphi, USA, Seminar, June 28, 2004

"Combined Power Generation Systems" Prof. Andrea Vezzini, University of Biel, Switzerland, Seminar, April/May, 2004

"Wind Powered Energy Sources - Simulation and Application" Prof. Braima Dakyo, University Le Havre, France, Seminar, April, 2004 "Introduction to VHDL Design of Digital Electronic Circuits" Dr Marcian Cirstea, De Montfort University, UK, Seminar, April/May, 2004 „Review of PWM Techniques for Three-Phase Voltage Sources Converters” Prof. Graham Holmes, Monash University, Australia Seminar, June, 2004.

POWER ELECTRONICS AND INTELLIGENT CONTROL FOR ENERGY CONSERVATION CENTRE OF EXCELLENCE

Institute of Control and Industrial Electronics; Warsaw University of Technology

ul. Koszykowa 75 ; 00-662 Warszawa / POLAND tel.:(+48 22) 628 06 65 ; fax.: (+48 22) 625 66 33

PELINCEC Executive Committee Director: Prof. Marian P.Kazmierkowski (mpk@isep.pw.edu.pl) Co-Director: Dr.Sc. Lech Grzesiak (lmg@isep.pw.edu.pl) Scientific Secretary: Dr. Marcin Iwanowski (iwanowski@isep.pw.edu.pl) Chairs of PELINCEC Working Groups: Power quality (WG1): Prof. Roman Barlik (barlik@isep.pw.edu.pl) New topology of power electronic converters (WG2): Dr. Mieczysław Nowak (mnowak@isep.pw.edu.pl) Intelligent control and signal processing (WG3): Dr.Sc. Bartłomiej Beliczyński (bartek@isep.pw.edu.pl) Industrial information technology (WG4): Dr.Sc. Andrzej Dzieliński (adziel@isep.pw.edu.pl) Renewable energy (WG5): Prof. Włodzimierz Koczara (koczara@isep.pw.edu.pl) Hybrid energy systems (WG6): Dr.Sc. Lech Grzesiak (lmg@isep.pw.edu.pl)

Winter 2003 PELINCEC Newsletter, No.2 5

PELINCEC Biographies

Bernardete Ribeiro is

Assistant Professor at

the Department of

Informatics Engineering,

Faculty of Science and

Technology, University of

Coimbra in Portugal.

She received a Chemical Engineering

degree from the Department of Chemical

Engineering, University of Coimbra, a M.Sc.

degree in Computer Science and a PhD in

Electrical Engineering both from the

Electrical Engineering Department,

University of Coimbra. Her current interests

include neural networks and their

applications to engineering systems,

computational learning, support vector

machines, fault detection and diagnosis

and intelligent control. She has more than

80 publications in these areas. She is a

member of INNS and IEEE.

Teresa Orlowska-Kowalska

has the professor’s Position

at Electrical Engineering

Faculty of Wroclaw

University of Technology.and

is head of Electrical Drives

Control Chair in the Institute

of Electrical Machines, Drives and

Measurements. She is author and co-

author of over 150 scientific papers,

7 chapters in books, one book and 2 text

books. Her field of interest is the

mathematical modelling and

microprocessor control of electrical drives

and power electronic systems, application

of modern control methods to electrical

drives, state estimation of induction motors

using observers and neural networks. She

is the member of Electrical Engineering

Committee of Polish Academy of Science

(from 1996), member of IEEE, EPE, CIGRE

and member of the international steering

committees of few well-known European

conferences.

Carlo Cerati received

The Dott Ing. Degree in

Electrical Engineering

from the University of

l'Aquila, L'Aquila, Italy in

1983. In the same year

he joined the Department

of Electrical Eng. of the same University

where currently he is an associate

professor at the Faculty of Engineering.

His main research interests cover several

aspects related to electrical drives including

control techniques, fault diagnosis and

microprocessor applications. He authored

more than 70 technical papers published on

international conference proceedings,

books and journals. He is a Senior Member

of IEEE.

Tadeusz Kaczorek

received the MSc., PhD

and DSc degrees from

Electrical Engineering of

Warsaw University of

Technology in 1956,1962

and 1964, respectively.

Since 1974 he is full professor at

Warsaw University of Technology. Since

1996 he is full member of Polish Academy

of Sciences. In December 2002 he was

awarded by the University of Zielona Góra

(Poland) by the title doctor honoris causa.

His research interests cover the theory of

systems and the automatic control systems

theory, specially, singular multidimensional

systems, positive multidimensional systems

and singular positive 1D and 2D systems.

He has published 17 books (5 in English)

and over 600 scientific papers.

Zbigniew Hanzelka

Professor in the Institute

of Electrical Drive and

Industrial Equipment

Control of University of

Science and Technology

- AGH. His area of

interests includes electrical power quality,

in particular methods of reducing the

influence of power converters on supply

network. He is the member of several

national and international committees,

among other IEC, UIE, CIGRE.

Jan J.M. Desmet

He was born in Kortijk,

Belgium, on March 30,

1960. He received the

engineer degree from

the Polytechnic in

Kortijk, Belgium in 1983

and the M.S degree in electrical

engineering in 1993 from the V.U. Brussels,

Belgium. Since 1984 he is member of the

staff of the Hogeschool West-Vlaandern

Dep. P.I.H. He is the professor teaching

variable speed drives and industrial electric

measurement techniques. His research

interests include variable speed drives,

rational use of electrical energy and power

quality. He is IASTED and IEEE member,

member of SC77A (IEC) and TC210

(CELENCEC).

Juri Varetski was born

in Lviv, Ukraine in 1952

and graduated in 1974 at

Lviv Polytechnic State

University. He had been

Employed by Chair of

Power Systems and

Network and received PhD in 1982 from the

Power Engineering Research Institute

Moscow. His current position is the

assistant – professor within the Chair of

Power Systems and Networks of Lviv

Polytechnic State University. His areas of

work are compensation means for industrial

and utility applications, computer analysis

of network transients and electric power

quality. He has written more than 40 papers

and holds 12 patents and authorship

certificates.

Frede Blaabjerg received

the Msc.EE. from Aalborg

University, Denmark in

1987, and the Ph.D.

degree from the Institute

of Energy Technology,

Aalborg University, in

1995. He became an

Assistant Professor in 1992 at Aalborg

University and in 1996 he became

Associate Professor Dr. Blaabjerg is a

member of the European Power Electronics

and Drives Association and the IEEE

Industry Applications Society Industrial

Drives Committee. He is also a member of

the Industry Power Converter Committee in

the IEEE Industry Application Society. He

serves as a member of the Danish

Technical Research Council in Denmark.

He received the 1995 Angelos Award for

his contribution in modulation technique

and control of electric drives, and the

Annual Teacher prize at Aalborg University.

Prof. Ion Boldea,

University Politechnica,

Timisoara, Romania, an

IEEE Fellow from 1996,

Has worked, published,

lectured and consulted

extensively on linear and

rotary electric motors

and generators: theory, design and control.

Among his publications are the 13

monographs published in USA and UK in

the last 30 year. He is the Cochairman of

OPTIM - 96, 98, 00, 02, 04 International

Conferences and Founding Director of the

new international journal: www.jee.ro