New Bidirectional Isolated Three-Phase DC–DC Converter With Parallel-to-Serial Configuration for Energy Applications

This article presents a set of bidirectional dc–dc power converter solutions for high-voltage, high-power applications using magnetic and semiconductor devices that need to handle a small fraction of the rated power and voltage. The elements are integrated in an interleaved operation, which results in the generation of a low rms and pseudosine phase current. All these features result in a topology with a high level of efficiency, maintaining soft-switching over the entire operating range. Steady-state equations and simulation results are presented and then experimentally validated with a 25 kW prototype converter. Finally, it is verified that the solution is suitable for the needs of the proposed dc-microgrid scenario, that includes hydrogen production and an EV-charger, using solar PV-panels and battery energy storage systems as energy sources.