Active and Reactive Power Decoupling Control of Grid-Connected Inverters in Stationary Reference Frame

Chinese Journal of Electrical Engineering ›› 2017, Vol. 3 ›› Issue (3): 18-24.

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Active and Reactive Power Decoupling Control of Grid-Connected Inverters in Stationary Reference Frame

Xin Zhao, Liuchen Chang^*

University of New Brunswick, Fredericton, NB, Canada

Online:2017-09-25 Published:2019-11-01
Contact: * E-mail: lchang@unb.ca.
About author:Xin Zhao received the B.E., M.E., and Ph.D. degrees in electrical engineering from Beijing Jiaotong University, Beijing, China, in 2008, 2010 and 2014, respectively. He was a Postdoctoral Research Fellow at Beijing Jiaotong University from 2014 to 2016, and he visited University of Alberta for one year during this period. He is currently with the Department of Electrical and Computer Engineering at University of New Brunswick. His main research interests are smart inverters, microgrids, and AC motor drives. Liuchen Chang received B.S.E.E. from Northern Jiaotong University in 1982, M.Sc. from China Academy of Railway Sciences in 1984, and Ph.D. from Queen’ University in 1991. He joined the University of New Brunswick in 1992 and is a professor in Electrical and Computer Engineering. He was the NSERC Chair in Environmental Design Engineering during 2001-2007, and was the Principal Investigator of Canadian Wind Energy Strategic Network (WESNet) during 2008-2014. He chaired the Sustainable Energy System Technical Committee (2011-2015) and is a vice president of the IEEE Power Electronics Society. Dr. Chang was a recipient of CanWEA R.J. Templin Award in 2010 for his contribution in the development of wind energy technologies, and the Innovation Award for Excellence in Applied Research in New Brunswick in 2016 for his contributions in smart grid and renewable energy technologies. He is a fellow of Canadian Academy of Engineering (FCAE). He has published more than 330 refereed papers in journals and conference proceedings. Dr. Chang has focused on research, development, demonstration and deployment of renewable energy based distributed generation systems and direct load control systems.

Abstract

Abstract: Proportion resonant(PR) controllers are able to achieve zero steady-state error for AC input signals and are widely used for simplifying control systems in the stationary reference frame. However, power decoupling in the stationary reference frame with a PR controller has not been investigated thoroughly. Based on the complex vector model of a grid-connected inverter(GCI), this paper deduces theoretically the power coupling relationship of GCI with the traditional PR current controller. A modified PR controller is provided for achieving the power decoupling, and the design method of the controller is presented. Simulation and experimental results verify that there is coupling between active and reactive power using the traditional PR controller and the proposed method can realize the power decoupling.

Key words: Grid-connected inverter, complex vector, proportion resonant controller, power decoupling control

Xin Zhao, Liuchen Chang. Active and Reactive Power Decoupling Control of Grid-Connected Inverters in Stationary Reference Frame[J]. Chinese Journal of Electrical Engineering, 2017, 3(3): 18-24.

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Active and Reactive Power Decoupling Control of Grid-Connected Inverters in Stationary Reference Frame

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