1. Faculty of Energy and Power Engineering, South Ural State University, Chelyabinsk 454 080, Russia
2. Department of Electronics and Communication Engineering, Panimalar Institute of Technology, Chennai 600 123, India
3. Department of Electrical and Electronics Engineering, Sri Sairam College of Engineering, Bangalore 562 106, India
4. Faculty of Electrical & Computer Engineering, Jimma Institute of Technology, Jimma University, Jimma, Ethiopia