High-Efficiency Three-Phase Bidirectional DC-AC Converter for Energy Storage Systems

This study presents a high-efficiency three-phase bidirectional dc-ac converter for use in energy storage systems (ESSs). The proposed converter comprises a modified three-level T-type converter (M3LT2C) and a three-level bidirectional dc-dc converter. The M3LT2C comprises two T-type cells to interface with a three-phase grid. By directly connecting the S-phase of the grid to a neutral point on th...