1. Department of Electrical Engineering, School of Automation, Guangdong University of Technology, Guangzhou, China
2. Guangdong Key Laboratory of Clean Energy Technology, South China University of Technology, Guangzhou, China
3. Digital Grid Research Institute, China Southern Power Grid, Guangzhou, China
4. Villum Center for Research on Microgrids, AAU Energy, Aalborg University, Aalborg, Denmark
5. Electrical and Computer Engineering Department, Illinois Institute of Technology, Chicago, IL, USA