[1] Univ Putra Malayasia, Dept Elect & Elect Engn, Serdang 43400, Selangor, Malaysia
[2] Lorestan Univ Appl Sci Kohdasht, Dept Elect Engn, Khorramabad, Iran
[3] Univ Witwatersrand, Sch EIE, Ctr Excellence High Voltage Engn, Johannesburg, South Africa
[4] Univ Putra Malaysia, Dept Mech Engn, Serdang 4330, Malaysia