Power flow and reliability analysis of a non-isolated PV/grid connected quasi resonant converter for off-board EV charging station

ABSTRACT

Growing awareness of greenhouse gas emissions and exhaustion of fossil fuels leads to the adoption of electric vehicles (EVs). However, the major limitations with respect to EV technology are the driving range and charging time. Also, the proliferation of EVs overloads the power grid and paves the way of incorporating renewable energy sources and energy storage devices. The use of multiple sources necessitates the deployment of compact, low-cost, and high-power electronic converters. This paper proposes a novel configuration of a Multi-Source Non-Isolated Quasi-Resonant Converter (MSNQRC) to overcome the limitations in the charging infrastructure. Due to the presence of a quasi-resonant network, the proposed MSNQRC with a single switch can achieve high voltage gain even at low-duty cycles, provide continuous current and low voltage stress. In addition, this paper elaborates on the parametric design of the converter along with PV modeling based on load ratings and the reliability research of MSNQRC by analysing component failures. A prototype model of 300W is built to verify the efficacy of the designed converter model. The results thus obtained validate the designed model and prove that the proposed system can be used for off-board battery charging systems.

KEYWORDS:

• Battery
• DC-DC boost converters
• electric vehicle charger
• photovoltaic system

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Harini S

Harini S received the B.E. degree from Avinashilingam University, India, in 2010, and the M.E. degree in power electronics and drives from Anna University, in 2014. She is currently pursuing the Ph.D. degree from SRM Institute of Science and Technology, Kattankulathur, India, with a focus on design of power electronic converters for electric vehicle charging applications. Her research interests include design and control of power electronic converters, and renewable energy systems.

Chellammal N

Chellammal N received her M.S. degree in Electrical Drives and Automation from Tashkent State Technical University, Tashkent, CIS (a former USSR) and her Ph.D. degree in Power Electronics from the Faculty of Engineering, SRM Institute of Science and Technology, Chennai, India. She is currently working as an Associate Professor at SRM Institute of Science and Technology. She has authored or co-authored more than 30 papers which are published in international journal including IEEE Access, Wiley, and IEEE international conferences etc. She is also serving as reviewer for many peer reviewed journals including IEEE transactions. Her research interests include modelling of power electronic converters and drives, EV charging, grid integration of renewable energy resources and design of controllers.

Ramesh C Bansal

Ramesh C. Bansal has over 25 years of teaching, research, academic leadership, and industrial experience. Currently he is Professor in EE Dept. at the University of Sharjah, UAE and Extraordinary Professor at the University of Pretoria, South Africa. In previous postings, he was Professor and Group head (Power) at the University of Pretoria, and worked with University of Queensland, Australia; USP, Fiji; BITS Pilani, India. Prof. Bansal has published over 450 journal articles, conf. papers, books/book chapters. He has Google citations of over 20000 and h-index of 70. He has supervised 25 PhD and 5 Post Docs. Prof. Bansal has significant attracted significant funding from Industry and Government Organisations. He is an Editor of reputed journals including IEEE Systems Journal, EPCS, SGSE. He is a Fellow, and CP Engg IET-UK, Fellow IE (India), and Senior Member IEEE. He has diversified research interests in the areas of Renewable Energy, Power Systems and Smart Grid.