1. School of Electrical and Computer Engineering, Shiraz University, Shiraz, Iran
2. Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, SK, Canada
3. Department of Electrical Engineering, School of Energy Systems, Lappeenranta University of Technology (LUT), Lappeenranta, Finland
4. Department of Electrical Engineering, The Hong Kong Polytechnique University, Hong Kong, China