Novel three-phase photovoltaic grid-connected inverter system structure

The utility model discloses a novel three-phase photovoltaic grid-connected inverter system structure. Photovoltaic array output terminals are connected with DC circuit breakers (1), DC EMI filters (2) and BOOST circuits (3) used for direct current boosting and maximum power tracing successively. Output terminals of the BOOST circuits (3) are connected in parallel, and then successively connected with a DC support capacitor (4) used for absorbing ripple current from a DC side and an inverter side, a three-phase full-bridge IGBT inverter circuit (5) used for converting DC to AC, a sine filter (6) used for eliminating AC harmonic waves, an AC main contactor (7) used for on-off control for circuit protection, an AC EMI filter (8) used for eliminating high-frequency interference and an AC circuit breaker (9) used for realizing the connection and the disconnection of a main power circuit and a power grid. An output terminal of the AC circuit breaker (9) is connected with the power grid.