Faculty of Electrical and Power Engineering Kronvalda blv. 1, Riga, LV-1010 Phone +37167089900 PLENARY SESSION 15 October 2009, at 10.00 Faculty of Electrical and Power Engineering, Kronvalda blv. 1, room 21 Chair: Prof. J. Gerhards, RTU 9.00 – 11.00 Registration 9.30 – 9.45 Opening Speech Prof. J. Gerhards Dean of Faculty of Power and Electrical Engineering, RTU Scientific Research at RTU in 2008. Present Situation and Perspective. Prof. L. Ribickis Vice-Rector of Science and Research, Director of Institute of Industrial Electronics and Electrical Engineering, Academician of Latvian Academy of Sciences Power Systems Development Planning in Uncertainty and Market Conditions Prof. A. Sauhats Director of the Institute of Power Engineering, Corresponding Member of Latvian Academy of Sciences The action plan and model for increase of energy efficiency and use of renewable energy resources in Latvia Prof. Dagnija Blumberga Director of Institute of Energy Systems and Environment Today’s Development of Power System Sector of Bulgaria Prof. N. Djagarov Technical University of Varna, Electrical Department, Bulgaria Coffee break 9.45 – 10.00 10.00 – 10.15 10.15 – 10.30 10.30 -10.45 11.00 – 11.30 Section „Power and Electrical Engineering” Scientific committee: A. Bačauskas KTU, Lithuania L. Boroņina STU, Russia V. Bražis RTU, Latvia M. Budahs Latvenergo, Latvia V. Čuvičins RTU, Latvia R. Deksnis KTU, Lithuania J. Dirba RTU Latvia J. Ekmanis FEI, Latvia I. Galkins RTU, Latvia J. Gerhards RTU, Latvia J. Greivulis RTU, Latvia K. Ketners RTU, Latvia M. Kolcun TUK, Slovakia V. Krēsliņš LEEA, Latvia O. Krievs RTU, Latvia N. Kuņicina RTU, Latvia L. Latkovskis FEI, Latvia J. Laugis TTU, Estonia T. Lehtla TTU, Estonia A. Mahņitko RTU, Latvia A. Meļko Latvenergo, Latvia V. Neimane Vattenfal, Sweden R. Neimanis General Electric, Sweden E. Pettai TTU, Estonia V.Pugachev FEI, Latvia I. Raņķis RTU, Latvia L. Ribickis RTU, Latvia A. Riosin TTU, Estonia A. Sauhats RTU, Latvia J. Stabulnieks FEI, Latvia A. Šņīders LLU, Latvia M. Valdma TTU, Estonia E. Vanzovičs RTU, Latvia D. Vinnikov TTU, Estonia V. Vodovozov TTU, Estonia Co-chairs: S. Vitolina L. Zemite I. Galkin V. Strelkovs RTU, Latvia RTU, Latvia RTU, Latvia RTU, Latvia Organizing Committee: O. Krievs RTU, Latvia A. Ziravecka RTU, Latvia O. Petrovska RTU, Latvia Conference Secretariat: Riga Technical University Faculty of Power and Electrical Engineering Kronvalda blv. 1, Riga, LV-1010, Latvia E-mail: power2009@conference.rtu.lv Phone: +371 67089942; +371 67089918; +371 67089418 Fax: +371 67089418 Section “Power and Electrical Engineering” Subsection “Power Engineering” 15 October 2009, at 11.30 Faculty of Power and Electrical Engineering, Kronvalda blv. 1, room 21 Chair: Prof. A. Sauhats, RTU 11.30 – 11.45 J. Linciks, Dz. Baranovskis (Latvia) Single Phase Earth Fault Location in the Medium Voltage Distribution Networks 11.45 – 12.00 Price of Water J. Survilo, D. Borejko (Latvia) 12.00 – 12.15 A. Galkina, N. Kunicina, Y. Chaiko (Latvia) Increasing Efficiency of Electrical Supply Model for Small Enterprises in Rural Regions 12.15 – 12.30 N. Tomin, V. P. Gerikh, I. N.Kolosok, V. G. Kurbatsky (Russia) Neural Network Forecasting of Prices in the Liberalized Electricity Market 12.30 – 12.45 L Zemite, J.Gerhards (Latvia) Evaluation of Distribution Network Customer Outage Costs 12.45 – 13.00 S. Guseva, O. Borscevskis, N. Skobeleva, N. Breners (Latvia) Load Forecasting till 2020 of Existing and Perspective Transformer Substations in Riga 13.00 – 13.15 J. Survilo, A. Kutjuns (Latvia) Operation Modes of HV/MV Substations 13.15 – 13.30 A. Lvovs, A. Staltmanis (Latvia) Selection of Schemes of Switchgears for New 110kV Substations 13.30 – 13.45 G. Georgiev (Bulgaria) Control of Steam-Turbine Regulators at Transition to an Island State 13.45 – 14.00 Discussion 14.00 – 14.30 Coffee break 14.30 – 14.45 G. Georgiev (Bulgaria), I. Zicmane (Latvia), E. Antonov (Latvia) Finding of the Rational Approach at the Decision of a Question of Compensation in High Voltage Networks 14.45 – 15.00 A. Mesnajevs, A. Zviedris (Latvia) Determination and Analysis of Synchronous Motor’s Parameters 15.00 – 15.15 J. Dirba, N. Levin, S. Orlova, V. Pugachov (Latvia) Optimization of the Magnetic Circuit of an Axial Inductor Machine 15.15 – 15.30 G.Dilevs, E.Jakobsons (Latvia) The Generated Power of Multipole Induction Generator with Secondary Winding on the Stator 15.30 – 15.45 I.Uteshevs, A.Levcenkovs (Latvia) Modeling of Overheat Process Control of Electric Motor 15.45 – 16.00 K. Berzina, E. Ketnere (Latvia) Simulation of Gas-turbine Driven Device 16.00 – 16.15 M. Konuhova, K. Ketners, E. Ketnere, S. Klujevska (Latvia) Investigations of the Undamped Field Effect to the Electromagnetic Processes in the Induction Machines 16.15 – 16.30 G. Gavrilovs, S. Vitolina (Latvia) Solid Insulation Drying of 110 kV Paper-oil Instrument Transformers 16.30 – 16.45 U. Antonovics, V. Brazis, J. Greivulis (Latvia) The Mechanical Transient Process at Asynchronous Motor Oscillating Mode 16.45 – 17.00 M. Kizlo, A. Kanbergs (Latvia) The Causes of the Parameters Changes of Soil Resistivity 17.00 – 17.30 Discussion Subsection “Electrical Engineering” 15 October 2009, at 11.30 Faculty of Power and Electrical Engineering, Kronvalda blv. 1, Assembly Hall Chair: Prof. L. Ribickis, RTU 11.30 – 11.45 E. Kamolins (Latvia) The Comparative Analysis of Inductor and Reluctance Wind Generators 11.45 – 12.00 D. Vinnikov, T. Jalakas, I. Roasto (Estonia) Analysis and Design of 3.3 kV IGBT Based ThreeLevel DC/DC Converter with High Frequency Isolation and Current Doubler Rectifier 12.00 – 12.15 A. Sokolovs, I. Galkins (Latvia) Analysis of Gate Drivers for Overvoltage Suppression in Matrix Converters for Integrated Drives 12.15 – 12.30 A. Stepanovs, L.Bisenieks, A.Sokolovs, I.Galkins (Latvia) Development of a Modular Power Converter 12.30 – 12.45 A.Andreiciks, K. Vitols, O. Krievs, I. Steiks (Latvia) Current Fed Step-up DC/DC Converter for Fuel Cell Inverter Applications 12.45 – 13.00 I. Rankis, A. Ziravecka, I.Bunina (Latvia) Investigation of the Input Unit of Frequency Converter 13.00 – 13.15 A.Vitols, I. Rankis (Latvia) Experimental Results from Physical Model of Bidirectional Power Flow Regulator for Power Substations of Electrical Transport 13.15 – 13.30 P. Chandrasekhar, S. Rama Reddy (India) Low Cost Embedded Controlled Full Bridge LC Parallel Resonant Converter 13.30 – 13.45 N. Djagarov, Z. Grozdev, M. Bonev (Bulgaria) Improvement the Work Effectiveness of Static VAR Compensators by Using of Two-input Adaptive Controllers 13.45 – 14.00 Discussion 14.00 – 14.30 Coffee break 14.30 – 14.45 I. Galkins, A. Avotins, A. Suzdalenko, L. Ribickis (Latvia) Comparison and Choice of Supply and Driver Unit for Power LED Luminary 14.45 – 15.00 V. Karevs, M. Mezitis (Latvia) Automatic Measurement for Internal Resistance of Battery in Uninterruptible Power Source 15.00 – 15.15 I. Steiks, L. Ribickis (Latvia) Voltage Monitoring on Capacitor of Modular Multilevel Converter 15.15 – 15.30 V. Cimanis, V. Hramcovs, I. Rankis (Latvia) Investigation of the Operation Speed of AC Voltage Sensor 15.30 – 15.45 M. Mikhov, T. Georgiev (Bulgaria) A Sensorless Speed Control System for DC Motor Drives 15.45 – 16.00 M. Gorobetz, I. Alps, A. Levchenkov (Latvia) Mathematical Formulation of Public Electric Transport Scheduling Task for Artificial Immune Systems 16.00 – 16.15 A. Patlins, N.Kunicina (Latvia) Development of Impact Aggregation Procedure for Sustainable Transport System 16.15 – 16.30 I. Beinarts, A. Levchenkov (Latvia) Control of Comfort Parameters in Interior of Railway Coach Using ANN and RFID Tasks 16.30 – 17.30 Discussion