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Abstract
Solar photovoltaics (PVs) have nonlinear voltage–current characteristics, with a distinct maximum power point (MPP) depending on factors such as solar irradiance and operating temperature. To extract maximum power from the PV array at any environmental condition, DC–DC converters are usually used as MPP trackers. This paper presents the performance analysis of a coupled inductor single-ended primary inductance converter for maximum power point tracking (MPPT) in a PV system. A detailed model of the system has been designed and developed in MATLAB/Simulink. The performance evaluation has been conducted on the basis of stability, current ripple reduction and efficiency at different operating conditions. Simulation results show considerable ripple reduction in the input and output currents of the converter. Both the MPPT and converter efficiencies are significantly improved. The obtained simulation results validate the effectiveness and suitability of the converter model in MPPT and show reasonable agreement with the theoretical analysis.
Acknowledgements
The authors wish to thank (i) Dr Muhammad K. Akbar, Assistant Professor, Dept. of Mech. and Manufacturing Engg., Tennessee State University, USA (ii) Dr Ashraf Uz Zaman, Postdoctoral Researcher, Division of Antenna Systems, Department of Signals & Systems, Chalmers University of Technology, Göteborg, Sweden and (iii) Md. Aminul Islam, Assistant Professor, CUET (M.Sc. in Mech Engg., University of Waterloo, Canada) for their co-operation in improving the quality of English of the paper.