A Three-Port Hybrid Bridge Based Bidirectional Series-Resonant Converter with Wide Voltage Conversion Gain

This digest proposes a novel three-port hybrid bridge based bidirectional series-resonant converter with a corresponding modulation strategy. With a three-level (TL) full-bridge and two two-level full-bridge, the proposed converter can be utilized for interfacing the medium voltage and low voltage DC grids. Comparing with the conventional three-port converter (TPC) with pulse-width modulation (PWM) or phase-shift control, the proposed converter has two operation modes, which can satisfy the wide voltage conversion gain.