1. London Center of Energy Engineering, School of Engineering, London South Bank University, London, U.K.
2. Faculty of Engineering and Environment, Department of Mathematics, Physics and Electrical Engineering, University of Northumbria, Newcastle upon Tyne, U.K.
3. Department of Electrical and Computer Engineering, Babol University of Technology, Babol, Iran
4. School of Electrical Sciences, Indian Institute of Technology, Goa, India