1. College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen, China
2. School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen, China
3. Electric Power Research Institute, China Southern Grid, Guangzhou, China
4. School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha, China
5. Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong