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Power Engineering 2012 INTERNATIONAL SCIENTIFIC EVENT POWER ENGINEERING 2012 Tatranske Matliare, Slovakia May 15-17, 2012 www.POWER-ENGINEERING.sk 1 International scientific event Power engineering 2012 (Energetika 2012) includes three international scientific conferences: Energy – Ecology – Economy 2012 Renewable Energy Sources 2012 Control of Power Systems 2012 ORGANIZERS Slovak University of Technology in Bratislava National Center for Research and Application Renewable Energy Sources Slovak Committee of World Energy Council VUJE, a.s. EVENT OBJECTIVES The main objectives of the event are to establish and enhance cooperation, information Exchange and experiences among power engineering experts from industry, universities and research institutes, from Slovakia and abroad. Event brings in the form of lectures, presentations and discussions further development in the area of operation and control of power systems, renewable energy sources, ecology and economy of power engineering. EVENT QUARANTEE Ministry of Economy of the Slovak Republic EVENT CHAIRMAN Profesor Frantisek Janicek Published by: Slovak University of Technology in Bratislava Design and production: Renesans, s. r. o. Number of pages: 304 Year of publishing: 2012 First edition 2 3 This Volume of Abstracts is an outcome Of the project entitled „Finalization of Infrastructure of the National Centre for Research and Aplication of Renevable Energy Sources“ ITMS 26240120028 as a part of the Operational Programme Research & Development funded by the ERDF Europska unia Agentura Európsky fond regionalneho rozvoja Ministerstvo školstva, vedy, výskumu a športu SR Operačný program VÝSKUM a VÝVOJ Podporujeme výskumné aktivity na Slovensku/ Projekt je spolufinancovaný zo zdrojov EU 4 POWER ENGINEERING 2012 11th INTERNATIONAL SCIENTIFIC CONFERENCE ENERGY ECOLOGY ECONOMY 2012 VOLUME OF ABSTRACT Tatranske Matliare, Slovakia May 15 – 17, 2012 www.POWER-ENGINEERING.sk 5 Volume of Abstacts of the 10th International Scientific Conference EEE 2012 ENERGY-ECOLOGY - ECONOMY 2012 Tatranské Matliare , Slovakia, May 15 - 17, 2012 Slovak Republic 2012 Slovak University of Trchnology in Bratislava Editors: Frantisek Janícek, Zaneta Eleschová All papers in the proceedings have been reviewed. Responsibility for the graphical and language correctness of the papers lies with the authors. Published by Slovak University of Technology in Bratislava Design and production: Renesans, s. r. o. Year of publishing: 2012 First edition ISBN 978-80-89402-49-6 INTERNATIONALE PROGRAM COMMITEE Chairman: Frantisek Janicek, SK Members: Alberto Borghetti, IT Pavol Božek, SK Ivo Doležel, CZ Jiři Drapela, CZ Žaneta Eleschova, SK Carlos Felgueiras, PT Evžen Haluzik, CZ Zdeněk Hradilek, CZ Jaroslav Holeček, SK Jaan Jarvik, EE Peter Kadar, HU Matej Korec, SK Jiři Koženy, CZ Emil Krondiak, SK Kairat Kuterbekov, KZ Zbyněk Martinek, CZ Gyorgy Morva, HU Vladimir Nečas, SK Jan Petrovič, SK Michal Pokorny, SK 6 Bekzat Prmantaeva, KZ Stanislav Rusek , CZ Andrzej Rusek, PL Pavel Santarius, CZ Michal Skałny, PL Vladimir Slugeň, SK Karel Sokansky, CZ Jerzy Szkutnik, PL Daniela Špirkova, SK Alexey Tadzhibaev, RU Josef Tlusty, CZ Petr Toman, CZ Jiři Tůma, CZ Ladislav Varga, SK CONTENS TRANSMISSION AND DISTRIBUTION SYSTEMS INVITED LECTURE: SURVE Y OF LOW-FREQUENCY ELECTROMAGNET IC FIELDS IN EHV AND UHV SUBSTATIONS USING A MATHEMAT ICAL MODELLING Bojda, P., Lago, J., Skurčak, Ľ., Savčak, M. ..............................................................................................................................................................................15 COMPARISON OF EHV OVER HEAD LINE CABLES FROM ASPECT OF THEIR STEEL CORE MAGNET IZAT ION Lago, J., Pavlov, Ľ. ........................................................................................................................................................................... .17 OPTIMIZATION OF ELECTRICAL PARAMETERS OF WINDINGS USED IN AXIAL FLUX ELECTRICAL MACHINES Uhrik, M. .............................................................................................................................................................................19 RELIABILITY AND E.M.C. APPROACH TO POWER SYSTEMS Pantůček, E. .............................................................................................................................................................................21 USE OF PSA METHODOLOGY FOR ANALYSIS OF SHUNT FAULTS AT A VARIOUS LOCATIONS ON THE 400 kV LINES Hlavač, P., KovacsZ.,Janiček,F. .........................................................................................................................23 RELIABILITY OF THE GRID AS FUNCTION OF POWER FLOW AND CONFIGURAT ION DURING MAINTENANCE Kovacs, Z., Hlavač, P., Janiček,F. ................................................................................................................. 25 THE INFLUENCE OF THE SPEED OF THE DOWN-WARD LEADER CHANNEL IN COMPUTAT ION OF ADDITIONAL CHARGE FOR PROTECTION AGAINST DIRECT LIGHTNING STRIKE BY CHARGE TRANSFER SYSTEM IN “ULTRA -CORONA ” MODE Talevski,V...........................................................................................................................................................27 7 NUMERICAL SOLUTION OF BOUNDARY INVERSE PROBLEMS OF ELECTRICAL CONDUCTIVITY Brilla, I................................................................................................................................................................29 NUMERICAL DETERM INAT ION OF VOLTAGE POTENTIAL INSIDE ORTHOTROP IC MEDIA USING VARIATIONAL METHODS Brilla, I..................................................................................................... ..........................................................31 POWER FLOW MODELLING IN ELECTRIC NETWORKS WITH RENEWABLE ENERGY SOURCES IN LARGE AREAS Buhawa, Z. M., Dvorsky,E................................................................................................................................ 33 VISUALIZATION PROBLEMS IN CONDUCTOR THERMAL AGING RESP. COMPARISON OF MATLAB AND GNUPLOT GRAP HICAL OUTPUTS Beza, J., Heckenbergerova J..............................................................................................................................35 TRANSMISSION ABILITY INCREASE BASED ON A WEATHER PREDICTION Vostracky, Z., Šnajdr, J., Krutina, A., Velek, J............................................................................................37 SYSTEMS FOR PROTECTION AND AUTOMAT ION OF DISTRIBUTION ELECTRIC NET WORKS 22 kV Horak,M............................................................................................................................................................39 THE DESTRUCTION INFLUENCE OF PUSLE AND SURGE CURRENTS ON OVERVOLTAGE PROTECTION Glasa M., HuttnerĽ............................................................................................................................................41 THE APPLICATION OF FINAL ELEMENT METHOD ON METAL OXIDE VARISTOR MODEL Glasa M.,...........................................................................................................................................................43 IMPORTANCE OF BACKUP DEVICE IN OVERVOLTAGE PROTECTION Kertesz, I...........................................................................................................................................................45 ELECTRO DYNAMIC FORCES IN CIRCUIT BREAKER Kertesz, I., Huttner, Ľ.....................................................................................................................................47 UNBALANCE IN 22 kV DISTRIBUTION NETS Eleschova, Ž., Belaň, A., Smitkova, M. ...........................................................................................................................................................................49 ANALYSIS OF POWER SYSTEM COLLAPSE RISK Eleschova, Ž., Belaň, A., Cintula, B. Smitkova, M.. ...........................................................................................................................................................................51 MITIGAT ION OF VOLTAGE SAGS IN THE DISTRIBUTION SYSTEM WITH DYNAMIC VOLTAGE RESTORER Viglaš, D., Belaň, A. ...........................................................................................................................................................................53 MEASURING AND EVAL UAT ING ENERGY CONSUMPTION IN STREET LIGHTING NETWORKS Janiga, P., Gašparovsky, D. ...........................................................................................................................................................................55 8 DEVELOPMENT OF NUCLEAR ENERG Y INDUSTRY INVITED LECTURE: APPLICATIONS OF NUCLEAR ENERGY IN FUTURE Sitek, J., Nečas, V. ...........................................................................................................................................................................59 EVALUATION OF AN EXTERNAL EXPOSURE OF A WORKER DURING MANIPULAT ION WITH WASTE PACKAGES STORED IN BOHUNICE RADIOACTIVE WASTE TREATMENT CENTRE Slimak, A., Hrnčiř, T., Nečas, V ...........................................................................................................................................................................61 ASSESSMENT OF EXPOSURE PATHWAYS CONNECTED WITH CONSTRUCTION AND OPERATION OF CONCRETE BRIDGE REINFORCED WITH VERY LO W LEVEL RADIOACTIVE STEEL Panik, M., Nečas, V. .........................................................................................................................................................................63
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