Topology of H5-D Non-Isolated PV Grid-Connected Inverter Based on Active Power Decoupling

With the development of distributed photovoltaic industry, household photovoltaic and energy storage equipment has gradually become a research hotspot. The non-isolated inverter topology can cater well to the characteristics of miniaturization and compactness of household inverters. However, non-isolated inverters have problems of electromagnetic compatibility and stability due to common mode current in parasitic capacitors. Otherwise, power fluctuations of twice the fundamental frequency on the AC side will be coupled to the DC side. This paper presents a non-isolated inverter with common mode current suppression and active power decoupling.