A New AC Bypass Single-Phase Transformerless Grid-connected Photovoltaic Inverter

Grid-connected photovoltaic (PV) power generation technology has increasingly become a research hotspot. Grid-connected inverter, as the interface between the PV array and the grid, is the key factors affecting the reliable operation of the system. Transformerless inverter is widely used in grid-connected inverter due to its high efficiency, low cost and light weight. However, the leakage current problem leads to serious safety and EMI issues among transformerless inverter. Therefore, this paper presents a new type of inverter, which can solve these problems and improve the efficiency of grid-connected PV inverter.