1. Department of Electric Power Systems and Management, Technical University of Cluj-Napoca, Cluj-Napoca, Romania
2. Department of Electric Machines and Drives, Technical University of Cluj-Napoca, Cluj-Napoca, Romania
3. Applied Mathematical Physics Research Group, Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt
4. Higher Institute for Engineering and Technology, New Damietta, Egypt