CAP Seminar Series
Title: Decentralized Unified Control of Grid-Following and Grid-Forming Voltage-Sourced Converters
Speaker: Amirnaser Yazdani, Toronto Metropolitan University
Venue: EENG 909b
Date and Time: Monday 07 April 2025, 11:00-12:00
Abstract: As one of the enabling devices of the modern power system, power-electronic converters, in particular the voltage-sourced converters, must be able to operate in both the grid-connected and islanded modes, and they are expected to also allow for seamless transition from one to the other mode. The two modes of operation, however, adhere to different, and in fact conflicting, characteristics. A widely accepted view, therefore, is to change their control strategy in accordance with the prevailing mode of operation. This, in turn, requires either pre-planned switching of the operating mode and the corresponding controller, or, in the case of an unpredictable transition, rapid detection of the emerging mode of operation for a timely change of the controller. The challenge is obviously greater in multi-converter systems. This talk presents the idea of a decentralized unified control for the converters, in an attempt to obviate the need for rapid detection of the operating mode or switching between different controllers. First an overarching idea is presented and then the idea is expanded to a more elaborate optimal control based on state feedback with integral action. The mathematical model and simulation/experimental results will be presented and discussed.
Biography: Amirnaser Yazdani received his BSC ., MSc, and Ph.D. degrees in electrical engineering from Sharif University of Technology (1995), University of Tehran (2001), and University of Toronto (2005). From 1995 to 2002, he worked as a design engineer of track vacancy detection and other railway signalling systems for Maharan Engineering Inc., Tehran, Iran. From 2005 to 2006, he was with Digital Predictive Systems Inc., Mississauga, ON, Canada, and engaged in design and manufacture of power converters for wind energy systems. In 2006, he joined the University of Western Ontario, London, ON, Canada, as an Assistant Professor. He is currently a Professor with Toronto Metropolitan University (formerly Ryerson University) in Toronto and active in teaching and research in the general areas of power electronics and power systems. Dr. Yazdani’s research interests include modeling and control of switching power converters, distributed electric power generation, microgrids, and control systems. Dr. Yazdani has co-authored two books entitled Voltage-Sourced Converters in Power Systems (IEEE-Wiley Press, 2010) and Multi-Terminal Direct-Current Grids (IEEE-Wiley Press, 2014). Since 2008, he has regularly served IEEE as an Associate Editor, Guest Associate Editor, or Guest Editor-in-Chief of various transactions, and is currently an Associate Editor of the IEEE Transactions on Power Electronics. He is a Fellow of the IEEE and a Professional Engineering in the Province of Ontario.
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