1. State Grid Corporation of China, NARI Group Corporation/State Grid Electric Power Research Institute,Nanjing,Jiangsu,P. R. China
2. State Grid Corporation of China, State Grid Zhejiang Electric Power Research Institute,Hangzhou,Zhejiang,P. R. China
3. State Grid Corporation of China, State Grid Anhui Electric Power Co. LTD,Hefei,Anhui,P. R. China