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Dr. Grzegorz Iwanski,
Warsaw University of Technology (PL), IEEE Member

Dr Iwanski received the M.Sc. degree in automation and robotics, and the Ph.D. degree in electrical engineering from Warsaw University of Technology (WUT), Warszawa, Poland, in 2003 and 2005, respectively. Since January 2006 to December 2008 he was a research worker in the Institute of Control and Industrial Electronics of WUT involved in international project within 6th Framework Programme of EU. Since 2009 he has been an Assistant Professor in Institute of Control and Industrial Electronics WUT. He teaches courses on power electronics, drives and power conversion systems. His research interests include variable and adjustable speed power generation systems, photovoltaic and energy storage systems, automotive power electronics and drives. In 2012/2013 he joined the team of REES UPC, Barcelona –Terrassa, within the framework of one year scholarship of Polish Minister of Science and Higher Education for investigation of power converters topologies with reduced common-mode component for photovoltaic systems. He is co-author of one monograph, three books chapters and about 50 journal and conference papers.

Converter Controlled Power Generation Systems


The lecture presents development of the variable speed power generation systems. The topics presented in this lecture are related to the general properties of variable and adjustable speed primary energy sources driving generation units with power electronic converters, special operation conditions like cooperation with unbalanced and distorted grid, standalone operation with nonlinear load and energy storage integration with power systems.
Power electronics converters are able to control instantaneous currents and voltages and improve significantly the quality of generated power depending on the operation mode. In the grid operation, there are different possible control strategies in the case of grid voltage imbalance and harmonics, unavailable for wound rotor synchronous machines or cage induction machines driven by classic fixed speed primary energy sources. In the standalone operation, equally important to the voltage quality is capability to deliver short circuit current. The lecture will discuss proposals of voltage harmonics compensation as well as hardware over-current protections allowing proper operation of short circuit breakers. Applying power electronic converters, the energy storage can be integrated with both grid connected and standalone energy sources. Some examples will be discussed.