Summary
A single‐input bipolar converter has been proposed along with a fast MPPT tracking algorithm. The proposed converter is used as an interface for PV panel to perform twofold task of effectively extracting the maximum power from the PV side and efficiently delivering the extracted power to the load. For effectively tracking the MPP (maximum power point) of PV panel, a modified perturb and observe (MP&O) algorithm has been proposed in the paper. Proposed algorithm works effectively even under fast variations of irradiation and ambient temperature. The proposed converter has been developed with a target application in DC nanogrid by providing two loading points with amplitude balanced bipolar outputs. Moreover, least input current ripple (compared with other conventional DC‐DC converters) aids the MPP algorithm in improving the tracking efficacy. As the proposed converter has synchronous switching operation at both output terminals referred to input side, the power conversion efficiency of the converter is very high. Two out of three switches used are ground referenced; thus, design complexity of the converter is greatly reduced. Proposed converter with the MP&O algorithm has been analyzed, and the simulation results are obtained using MATLAB/Simulink. A laboratory developed prototype is used to experimentally validate the proposed converter.
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