1. School of Electrical & Automation EngineeringNanjing Normal UniversityNanjingPeople's Republic of China
2. State Grid Lianyungang Power Supply CompanyLianyungangPeople's Republic of China
3. Key Laboratory of New Energy Generation and Power ConversionNanjing University of Aeronautics and AstronauticsNo. 169 Sheng Tai West Road, Jiang Ning DistrictNanjingPeople's Republic of China
4. Nanjing BranchState Grid Electric Power Research InstituteJiangsuPeople's Republic of China