1. Department of Electrical Engineering, Faculty of Engineering at Shoubra, Benha University, Cairo, Egypt
2. Department of Electrical Power and Machines Engineering, Faculty of Engineering, Tanta University, Tanta, Egypt
3. Extra High Voltage Research Centre, Egyptian Electricity Holding Company, Cairo, Egypt
4. Department of Electrical Engineering and Automation, School of Electrical Engineering, Aalto University, Espoo, Finland