1. College of Computer and Control Engineering, Northeast Forestry University, Harbin, China
2. State Grid Economic and Technological Research Institute Company Ltd., Beijing, China
3. State Grid Heilongjiang Electric Power Company Ltd., Harbin, China
4. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing, China
5. School of Electrical Engineering, Southeast University, Nanjing, China