1. School of Electrical Engineering, Shandong University, Jinan, China
2. China Electric Power Research Institute, Beijing, China
3. Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University, Jinan, China
4. State Grid Zhenjiang Power Supply Company, Zhenjiang, China
5. School of Electrical Engineering, Xinjiang University, Urumqi, China