Keynote Speaker III


June 5, 2017 (Mon.) 10:30 – 11:10
Use of Voltage-Controlling Converters in Multi-Source AC Power Systems

 

Prof. Dushan Boroyevich

 

IEEE Fellow

Professor

Virginia Polytechnic Institute and State University, USA

CPES Co-Director

 


Biography


Prof. Dushan Boroyevich received his Dipl. Ing. degree from the University of Belgrade in 1976 and his M.S. degree from the University of Novi Sad in 1982, in what then used to be Yugoslavia. He received his Ph.D. degree in 1986 from Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, USA. From 1986 Boroyevich to 1990, he was an assistant professor and director of the Power and Industrial Electronics Research Program in the Institute for Power and Electronic Engineering at the University of Novi Sad. He then joined the Bradley Department of Electrical and Computer Engineering at Virginia Tech as associate professor. He is now University Distinguished Professor and Associate Vice President for Research and Innovation in Energy Systems at Virginia Tech, and Director of the Center for Power Electronics Systems.

Dr. Boroyevich has led numerous research projects in the areas of multi-phase power conversion, electronic power distribution systems, modeling and control, and multi-disciplinary design optimization. He has advised over 40 Ph.D. and 40 M.S. students to graduation and has co-authored with them over 700 papers. Dushan was the president of the IEEE Power Electronics Society (PELS) for 2011-12. He is a Fellow of IEEE and recipient of numerous awards, including the IEEE William E. Newell Power Electronics Technical Field Award, the IEEE PELS Harry A. Owen Distinguished Service Award, European Power Electronics Association (EPE) Outstanding Achievement Award, and the Award for Outstanding Achievements and Service to Profession by the European Power Electronics and Motion Control Council. He is an Honorary Professor at the Xi’an Jiaotong University in Xi’an, China, and K.T. Li Chair Professor at the National Cheng Kung University, in Tainan, Taiwan. Dushan was elected to the US National Academy of Engineering in 2014 for advancements in control, modeling, and design of electronic power conversion for electric energy and transportation.


Abstract


In today’s climate of enhanced apprehension about the clash between energy and environment, it is becoming a conventional wisdom to expect that massively increased utilization of electricity in the energy production, transfer, and consumption will provide the necessary means for a sustainable future. Modern electronic power distribution systems built for airplanes, ships, electric vehicles, data-centers, and homes, comprise dozens, even hundreds of electronic power converters, which is challenging our basic understanding about how power systems are designed and operated. The challenge seems even more daunting when thinking about how the electrical grid – widely considered the biggest and most complex system ever built by humankind – will be impacted by the massive onslaught of renewable and distributed generation. It is therefore essential to develop innovative methods that allow easier system-level modeling, improved system integration, and continuous monitoring of dynamic interactions.

The presentation will first address an approach to control three-phase voltage-source converters based on the electro-mechanical duality with synchronous machines. It will be shown that electronic power converters can provide dispatchable “spinning reserve” by emulating the behavior of rotating generators, but that they also open completely new ways of operating multi-source ac power systems. The talk will further advance into the discussion of small-signal instabilities that could be caused by interactions between power converters, showing possible approaches in avoiding them during system design. Finally, a “black box” approach to modeling of power electronics converters will be presented, introducing a method to remove source and load dynamics from in-situ measured terminated frequency responses. It will be shown how converter, itself, can perform an on-line stability assessment knowing its own un-terminated dynamics.