1. Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Malaysia
2. Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milan, Italy
3. Advanced High Voltage Engineering Research Centre, School of Engineering, Cardiff University, Cardiff, U.K.
4. Department of Electrical Energy System, CASE, UET Peshawar, Peshawar, Pakistan