1. State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China
2. School of Automation, Chongqing University of Posts and Telecommunications, Chongqing, China
3. Guangdong Key Laboratory of Electric Power Equipment Reliability, Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou, Guangdong, China
4. China Three Gorges Contruction Engineering Corporation, Chengdu, China
5. Department of Electrical and Computer Enginering, New York University, Brookly, New York, NY, USA