1. Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, 071003 Baoding, China
2. State Grid Electric Power Research Institute, Wuhan Nari Co., Ltd, 430072 Wuhan, China
3. Electric Power Planning and Engineering Institute Co., Ltd, 100120 Beijing, China
4. Electric Power Research Institute, 430072 Wuhan, China
5. College of Electrical Engineering and New Energy, China Three Gorges University, 443002 Yichang, China