1. Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China
2. Department of Electrical Engineering, University of Shanghai for Science and Technology, Shanghai, China
3. School of Electrical Engineering, Chongqing University, Chongqing, China
4. Northwest Branch of State Grid Corporation of China, Xi'an, Shanxi, China