Department of Electrical Engineering Tsinghua University Beijing 100084 P. R. China;
Laboratory of Low Carbon Energy Tsinghua University Beijing 100084 P. R. China;
Department of Electrical Engineering Tsinghua University Beijing 100084 P. R. China;
Global Energy Interconnection Development and Cooperation Organization Beijing 100031 P. R. China;
Global Energy Interconnection Group Co. Ltd. Beijing 100031 P. R. China;
Global Energy Interconnection Development and Cooperation Organization Beijing 100031 P. R. China;
Global Energy Interconnection Group Co. Ltd. Beijing 100031 P. R. China;