1. Three Gorges Electric Power Co. Ltd 1 , Wuhan 430000, China
2. Energy Research Institute, Qilu University of Technology (Shandong Academy of Sciences) 2 , Jinan 250014, China
3. Science and Technology Research Institute, China Three Gorges Corporation 3 , Beijing 100038, China
4. Qinneng Qiyuan Electric Power Engineering Design Co., Ltd 4 , Jinan 250101, China