Leakage Current Mitigation in Transformerless Grid-Connected PV Inverters Through Level Modulation Switching

Leakage current is a common problem in transformerless grid-connected PV inverters, as it can cause elec-tromagnetic interference and reduce the quality of the power injected into the grid. It can also lead to electrical safety problems, impair the performance of other equipment, and make the generation system unavailable. Therefore, controlling and minimizing leakage current in transformerless grid-connected PV inverters is essential to ensure system efficiency and safety. In this sense, a new single-phase grid-connected transformerless inverter topology was proposed using modulation switching techniques keep the leakage current at normatively fair values.