A Non-isolated High-gain Double-grounded Single-phase Grid-connected Inverter

To solve the problem of common-mode leakage current of non-isolated inverter, a single-phase double-grounding inverter was proposed. The ground of the input source shares with the ground of the load, which short the parasitic capacitance. Thus, the common mode leakage current is eliminated. The inverter achieves high gain and is suitable for a wide range of input voltage application. Fewer energy storage components can significantly reduce the size and weight of the inverter to meet economic requirements. Finally, simulation confirms the theoretical analysis.