1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, China
2. China Southern Power Grid Guangxi Electric Power Company, Nanning, China
3. Department of Engineering, Strand Building, Strand Campus, King’s College London, London, U.K.
4. State Grid Wuhan Electric Power Supply Company, Wuhan, China