XU Jia-zhu1, DONG Xin-xiao1, LIANG Chong-gan1, LUO Long-fu1, FU Ying2, MEI Nian2, LUO Zhi-ping3
(1.National Electric Power Conversion and Control Engineering Technology Research Center(Hunan Univ), Changsha, Hunan410082,China; 2. State Power Economic Research Institute, Beijing 102209, China;3. Maintenance Company of State Grid Hunan Electric Power Corporation, Changsha, Hunan410082,China)