1. Ph.D. Student, Dept. of Electrical Engineering, Tsinghua Univ., Beijing 100084, China.
2. Associate Professor, Photovoltaic Industry Research Center, Qinghai Univ., Xining 810016, China; Associate Professor, Dept. of Electrical Engineering, Tsinghua Univ., Beijing 100084, China.
3. Advanced Engineer, Global Energy Interconnection Research Institute, Beijing 102209, China.
4. Assistant Professor, Dept. of Electrical Engineering, Tsinghua Univ., Beijing 100084, China (corresponding author).
5. Associate Professor, Dept. of Electrical Engineering, Tsinghua Univ., Beijing 100084, China.
6. Postdoctoral, Dept. of Electrical Engineering, Tsinghua Univ., Beijing 100084, China.
7. Professor, Photovoltaic Industry Research Center, Qinghai Univ., Xining 810016, China; Professor, Dept. of Electrical Engineering, Tsinghua Univ., Beijing 100084, China.
8. Associate Professor, Dept. of Electrical Engineering, Xinjiang Univ., Urumqi 830046, China.