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High Efficiency Resonant Boost Converter for Photovoltaic Energy Harvesting

Anoop D Nath, K Radhakrishnan

In this work, a single-switch resonant boost converter with an energy-blocking diode was proposed for use in a solar energy generation system. The structure of the proposed converter is simpler and cheaper than other resonant power converters, which require numerous components. The proposed single-switch resonant power converter offers the advantages of soft switching, reduced switching losses, and increased energy conversion efficiency. This circuit topology integrates a single-switch resonant converter with zero-voltage-switching (ZVS) with an energyblocking diode with zero-current-switching (ZCS). The energy blocking diode with a direct current (DC) output filter filters the output stage of the single-switch resonant converter. Only one active power switch is used for power energy conversion to reduce the cost of active power switches and control circuits. Simulation results demonstrate a satisfactory performance of the proposed topology, which is especially suited to the energy conversion applications in photovoltaic energy generation systems.