[Zeng, Xiangjun;Zhang, Weiming;Gu, Yingke] Changsha Univ Sci & Technol, Hunan Prov Key Lab Smart Grids Operat & Control, Changsha 410004, Hunan, Peoples R China.^[Xu, Shun] HHPDI, Changsha, Hunan, Peoples R China.^Hunan Prov Planet Intelligent Elect Dev Co, Changde 415500, Peoples R China.