Control and experimental validation of a Dual Active Bridge Series Resonant Converter

This article addresses the control and experimental validation of a Dual Active Bridge Series Resonant Converter (DBSRC) for interconnecting two DC systems. The DBSRC provides High Frequency (HF) isolation between the primary and the secondary circuits and allows to transfer power in both directions. Conventionally, it is operated at fixed frequency, applying an angle shift between the square waves generated by both H-bridges, to establish the power transfer. This work proposes a control strategy to operate the converter, based on optimization, that allows to reduce the AC HF current. Also, a real prototype of the converter is built and its operation is shown through experimental results.