1. Universiti Malaysia Sarawak, 94300, Sarawak, Malaysia.
2. School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Hawthorn, VIC 3122, Australia, Power Electronics and Renewable Energy Research Laboratory, Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia and Department of Electrical Engineering, College of Engineering, Universiti Tenaga Nasional, Selangor, Malaysia.