1. Marketing Service Center, State Grid Zhejiang Electric Power Co., Ltd.,Hangzhou,China
2. Ningbo Power Supply Company, State Grid Zhejiang Electric Power Co., Ltd.,Ningbo,China
3. Shaoxing Power Supply Company, State Grid Zhejiang Electric Power Co., Ltd.,Shaoxing,China
4. College of Electrical Engineering, Zhejiang University,Hangzhou,China