1. Energy Research Institute, Nanyang Technological University, Singapore
2. Department of Electronic, Electrical and Automatic Engineering, Universitat Rovira i Virgili, Tarragona, Spain
3. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
4. Laboratory of Engineering for Energy and Environmental Sustainability, Universidad de Sevilla, Sevilla, Spain
5. Department of Electrical and Electronic Engineering, The University of Melbourne, Parkville, VIC, Australia
6. Department of Electrical, Electronic and Computer Engineering, The University of Western Australia, Crawley, WA, Australia