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A modified converter is presented and analyzed to use as a photovoltaic converter. The ratio of the output to the input voltage of the modified converter is equal to that of general boost converter. The difference between both converters is the composition of output terminal. Owing to the discrepancy, working voltage of the output capacitor of the modified converter becomes lower, and output capacitor can be smaller than that of the boost converter. And also a parallel driving scheme is applied to increase output power and to reduce the output voltage ripple. The parallel driving based on the modified converter and a current-mode-control method give a good solution for alleviating the current sharing unbalance problem of conventional parallel operations. It reduces the output voltage ripple by means of increasing the equivalent switching frequency without additional switching losses. The validity of the proposed modified converter is verified through computer-aided simulations and experimental results.

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Abstract

1. Introduction

2. Proposed PV Converter

3. Operational Principle of the Proposed Parallel Driving Method

4. Simulation and Experimental Results

5. Conclusion

References

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UCI(KEPA) : I410-ECN-0101-2009-563-018203415