A comparative study of Three–Phase Dual Active Bridge Converters for renewable energy applications

Abstract

The influence of different transformers in the operation of a three–phase dual active bridges DC–DC converter is analyzed. The transformers considered have their windings connected in star–star, delta–delta, star–delta and delta–star. The main objective of this paper is to obtain factors of merits to allow the selection of a transformer which will yield higher converter performance for a given application. These factors of merits allows estimate the losses in power semiconductors and high frequency transformers. Additionally, operation regions under soft switching are deduced for each transformer.