[Liu, Jiayan; Hu, Sijia; Li, Yong; Wu, Huidi; Hu, SJ; Zeng, Rong; Chen, Jie] Hunan Univ, Coll Elect & Informat Engn, Changsha 410082, Peoples R China.
[Xu, Yong] State Grid Hunan Elect Power Co Ltd, Technol Res & Dev Ctr, Changsha 410000, Peoples R China.
[Yang, Xusheng] State Grid Integrated Energy Serv Grp Co Ltd, Planning Management Expert Grp, Beijing 101207, Peoples R China.
[Cao, Yijia] Changsha Univ Sci & Technol, Sch Elect & Informat Engn, Changsha 410114, Peoples R China.