1. College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
2. Nanchang Power Supply Branch, Jiangxi Electric Power Company of State Grid, Nanchang, China
3. College of Electrical Engineering and Automation, Fuzhou University, Fuzhou, China
4. School of Electrical and Electronic Engineering, North China Electric Power University, Beijing, China
5. School of Electrical and Automation, Wuhan University, Wuhan, China