Smart/Micro Grids Research Center, University of Kurdistan, Iran.
By Prof. Hassan Bevrani
Smart/Micro Grids Research Center, University of Kurdistan, Iran.
A key solution in response to the challenge of economical harvesting of electrical energy and considering the environmental issues, could be to integrate more and more distributed generators (DGs) and renewable energy sources (RESs) in the electric network. However, recent studies have investigated that relatively high DGs/RESs integration will have some negative impacts on power grid dynamics, power quality, frequency control, voltage regulation, as well as other control and operation issues. In consequence, this challenge significantly limits the rate of renewable power penetration as well as overall system stability margin. Decreasing system inertia, increasing uncertainties and highly dynamic variable nature of DGs and RESs are known as the main reasons. These impacts may increase for the dynamically week power grids at the penetration rates that are expected over the next several years.
An idea towards stabilizing a grid with numerous distributed DGs/RESs is to compensate system inertia and weak dynamics, virtually. This may be established by a primary power source (e.g., DG or an energy storage) together with a smart controlled power electronics inverter/converter. This setup will then operate to emulate desirable dynamics, such as inertia and damping properties, by flexible shaping of its output active and reactive powers. This approach provides a promising solution to improve power grid stability and performance in the presence of a high penetration of DGs/RESs. In this speech, recent advances on power grid dynamics shaping using controlled power inverters will be emphasized.
Biography
Hassan Bevrani received PhD degree in electrical engineering from Osaka University in 2004. He is a full professor and the Program Leader of Micro/Smart Grids Research Center (SMGRC) at the University of Kurdistan. Over the years, he has worked with Osaka University, Kumamoto University, Doshisha University, Nagoya University (Japan), Queensland University of Technology (Australia), Kyushu Institute of Technology, Centrale Lille (France), and Technical University of Berlin (Germany). Currently, he is a visiting professor at the Osaka University and experienced research fellow of AvH foundation. He is the author of 7 international books, 15 book chapters, and more than 350 journal/conference papers. He has been the gust editor of 4 volumes of Elsevier Energy Procedia and Energy Reports journals. His current research interests include Smart grid operation and control, power system stability, Microgrid dynamics and control, and Intelligent/robust control applications in power electric industry.