1. Hebei Key Laboratory of Distributed Energy Storage and Micro GridNorth China Electric Power UniversityBaoding071003People's Republic of China
2. State Key Laboratory of Alternate Electrical Power System with Renewable Energy SourcesNorth China Electric Power UniversityBaoding071003People's Republic of China
3. School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBaoding071003People's Republic of China