无变压器双频并网逆变器拓扑与控制方法研究

In order to suppress leakage current and improve the efficiency of the transformer-free grid-connected inverter, a novel topology and control method is proposed. The proposed inverter consists of a power inverter unit and an auxiliary converter unit, and the two units are connected by a capacitor on the dc side. The power inverter unit transmits power to the grid at a low switching frequency for r...