1. College of Electrical and Information Engineering, Hunan University, Changsha, China
2. State Grid Integrated Energy Service Group Company Ltd., Beijing, China
3. Galvin Center for Electricity Innovation, Illinois Institute of Technology, Chicago, IL, USA
4. State Grid Hunan Power Company Limited Research Institute, Changsha, China
5. Hunan Xiangdian Test and Research Institute Company Ltd., Changsha, China