Non-isolated single-phase photovoltaic grid-connected inversion topology structure

The invention discloses a non-isolated single-phase photovoltaic grid-connected inversion topology structure. The structure includes a photovoltaic array PV, a clamping capacitor set, a single-phase full-bridge inverter, a filter circuit and a power grid UG that are successively connected, and the structure is characterized by further including an anti-leakage current circuit, the anti-leakage current circuit is connected with the clamping capacitor set and the filter circuit. The non-isolated single-phase photovoltaic grid-connected inversion topology structure, the potential clamp of the follow current loop is enabled to be at the neutral point voltage, and the neutral point voltage is kept constant, so that the effect of reducing the leakage current is achieved; in addition, due to thepower transmission mode, the number of the switches having current flow through is small, the loss is reduced, and better common mode characteristic and higher efficiency are achieved. 本发明公开了种非隔离型单相光伏并网逆变拓扑结构，包括依次连接的光伏阵列PV、钳位