Abstract
In order to meet the needs of different occasions for the low power photovoltaic grid-connected inverter, designed a single phase 3KW two stage photovoltaic grid-connected inverter. DC - DC link used an improved ZVT- Boost circuit to achieve maximum power point tracking (MPPT) control of the panels, DC-AC link used frequency doubling unipolar SPWM control to ensure the full-bridge inverter circuit output current waveform distortion rate minimum, at the same time to achieve the highest efficiency.
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