1. Department of Electrical and Electronic Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, China
2. Inner Mongolia Electric Power Research Institute Co., LTD, Hohhot, China
3. Department of Electrical Engineering, City University of Hong Kong, Hong Kong SAR, China
4. School of Electrical Engineering, State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, China
5. Hong Kong Polytechnic University Shenzhen Research Institute, China
6. Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada
7. Department of Electrical Engineering, University of Arkansas, Fayetteville, AR, USA