[Zhou, Renjun;Li, Yishu;Sun, Jiagan;Liu, Duli] Changsha Univ Sci & Technol, Sch Elect & Informat Engn, Smart Grids Operat & Control Key Lab, Changsha, Hunan, Peoples R China.^[Zhang, Hao] State Grid Chongqing Changshou Power Co, Chongqing, Peoples R China.