New inverter topology for ground current suppression in transformerless photovoltaic system application

An interesting inverter topology is proposed in this paper. It is similar to the typical three-phase full bridge inverter from the topology point of view, but smartly designed for the ground current reduction in single-phase photovoltaic (PV) inverter applications. Theoretical analysis is conducted to clarify the operation mechanism of the proposed topology. Performance evaluation is carried out to verify the effectiveness of the proposed topology for the ground current suppression.