1. School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha, China
2. School of Civil Engineering, Sydney University, Sydney, NSW, Australia
3. Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin, China
4. Department of Electrical Engineering, University of Sydney, Sydney, NSW, Australia
5. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore