Performance analysis of H6 topologies for transformerless inverter photovoltaic grid tied system

One of the most important and common parts of the modern power systems is the grid-connected photovoltaic (PV) systems. Recently, these systems have gotten a big revolution due to the introduction of the transformerless inverters. The introduction of transformerless inverters has indeed brought about advantages such as small size, low cost, and high efficiency, but it has also raised safety concerns, particularly with leakage current. Various researches were directed toward evolving their performance and diminishing the leakage current to the standard limits. This paper presents an H6 inverter topology that reduces leakage current, conduction losses and improves inverter efficiency. In order to verify the theoretical explanations, the proposed topologies are simulated in MATLAB/Simulink. Simulations have been conducted to compare the performance of H6 topology with conventional topology.