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Design and analysis of a practical three-phase grid-connected photovoltaic inverter

This paper has provided a practical design architecture of three-phase grid-connected photovoltaic power generation inverter, converting direct current from photovoltaic array to alternating current whose phase and amplitude are the same as the grid. Furthermore, the schemes are described separately from the hardware design, software design and protect-function design. Additionally, based on traditional arithmetic of maximum power point tracking (MPPT) and island detection, the developed solutions are introduced. In sum, the feasibility of this plan has been demonstrated, through trial and certification of related certification authority.