1. School of Electrical and Information Engineering, Tianjin University, Tianjin, China
2. Shenzhen Research Institute, Centre for Advances in Reliability and Safety, Research Institute for Smart Energy, and the Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong
3. School of Electrical Engineering, Shandong University, Jinan, China
4. Department of Electrical and Computer Engineering, University of Connecticut, Storrs, CT, USA
5. School of Electrical and Electronic Engineering, Nanyang Technological University, Jurong West, Singapore
6. Department of Energy Technology, Aalborg University, Aalborg, Denmark