A Dual-Buck-Structured Transformerless Inverter with a Common Ground

This paper proposes a new common-ground transformerless inverter for a single-phase system. The proposed inverter is derived based on a dual-buck structure, in which a zero-leakage current is obtained. The proposed inverter has no shoot-through problem; thus, the inverter’s reliability is improved. A comparison study with the conventional common ground transformerless inverter has been made to evaluate the performance of the proposed inverter. Finally, simulation and experimental verifications are presented to confirm the effectiveness of the proposed inverter.