EECS500 Spring 2016 Department Colloquium

Ali Mehrizi-Sani
Control Strategies for Power Electronics Converters
Washington State University
White 411
April 12, 2016

One of the U.S. grand energy challenges is to enable integration of at least 80% renewable energy resources at a competitive cost in the power grid by 2050. It is shown that it is technically feasible to run the U.S. economy on renewable technologies that are available today. However, what is missing is a flexible power system infrastructure to accommodate the unique characteristics of renewable energy resources, such as susceptibility to violation of operational limits due to the dominant application of power electronics converters as the interface media. This problem is exacerbated in a small-scale power system, e.g., a microgrid, which has relatively limited resources. This talk discusses strategies to address these challenges and focuses on an add-on control strategy for transient response shaping of controllable devices of a microgrid, and in particular power electronics—based devices, using local measurements. This strategy augments an existing controller and enhances its performance by monitoring the response and temporarily modulating the set point. The salient features of this strategy are (i) robustness with respect to system parameters, (ii) independence of system model, (iii) reliance merely on local signals, and (iv) absence of need to adjusting existing controllers. This talk discusses the proposed control strategy, evaluates its performance, and establishes its technical feasibility through several case studies.


Dr. Ali Mehrizi-Sani received the B.Sc. degrees in Electrical Engineering and Petroleum Engineering from Sharif University of Technology, Tehran, Iran, in 2005, and the Ph.D. degree from the University of Toronto, Toronto, ON, Canada, in 2011, both in electrical engineering. He is currently an Assistant Professor at Washington State University, Pullman, WA, USA. His areas of interest include power system applications of power electronics and integration of renewable energy resources. Dr. Mehrizi-Sani is an Editor of the IEEE Transactions on Power Delivery, the IEEE Transactions on Power Systems, and the IEEE Transactions on Energy Conversion. He is the Chair of the IEEE Task Force on Dynamic System Equivalents, the Secretary of CIGRE WG C4.34 Applications on PMUs for Power System Dynamics, and a contributing member of several other IEEE task forces. His co-authored paper, “Trends in microgrid control,” received the 2015 technical committee working group recognition award from the IEEE PES Power System Dynamic Performance Subcommittee. He was a recipient of the NSERC Postdoctoral Fellowship in 2011. He was a Connaught Scholar at the University of Toronto. He received the Dennis Woodford prize for his M.Sc. Thesis.