1. Xi’an Jiaotong University,State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an,China,710049
2. Aswan University,APEARC, Faculty of Engineering,Aswan,Egypt,81542
3. Xi’an Jiaotong University,School of Electrical Engineering,Xi’an,China,710049
4. Universidad San Sebastián,Facultad de Ingeniería, Arquitectura y Diseño,Santiago,Chile,8420524