1. School of Electrical Engineering & Automation, Harbin Institute of Technology, Harbin, China
2. School of Electric Power, Shenyang Institute of Engineering, Shenyang, China
3. Liaoning Electric power Development Group Co., Ltd., Shenyang, China
4. School of Electrical Engineering, Shenyang University of Technology, Shenyang, China
5. Liaoning Provincial Institute of Safety Science, Shenyang, China