1. Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, China
2. State Grid Fujian Fuzhou Electric Power Supply Company, Fuzhou, China
3. School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China
4. State Key Laboratory of Internet of Things for Smart City and Department of Electrical and Computer Engineering, University of Macau, Macau, China
5. Department of Electrical Engineering, University of Texas at Arlington, Arlington, TX, USA