A Three-port Dual Active Bridge Resonant Based with DC/AC Output

This paper introduces a three-port dc-dc-dc/ac converter based on dual active bridge resonant (DABR) topology that can integrate two dc input sources such as photovoltaic (PV) panels and provide one dc/ac output (battery/grid). The proposed converter is well-suited for grid-tied photovoltaic and energy storage systems. The power flow occurs due to the phase-shift between the primary and secondary switches. We employ triple phase-shift (TPS) modulation that confirms zero-voltage-switching (ZVS) of all the switches for a wide range of output voltage and thereby, increases the overall efficiency. The operating principles of the three-port converter have been described. Both simulation and experimental results demonstrated in the paper validate the feasibility of the proposed converter.