Design and Implementation of Dual Active Bridge Converter for DC Microgrid application

Intermittent power availability from renewable sources and need for the incorporation of intermediate energy storage system resulted in the need of bidirectional dc-dc converter (IBDC). Among a vast variety of IBDCs, Dual Active Bridge (DAB) converter is most promising from the standpoint of power handling capacity and efficiency of the overall system. DAB bidirectional DC/DC converter is a topology with the advantages of decreased number of devices, soft-switching commutations, low cost, and high efficiency. This paper describes the guidelines of designing a DAB converter for small DC microgrid application. It is shown that judicial selection of reactive elements leads to soft switching for all the switches in the converter in varying load condition. A guideline for the design of controller is given and the operations are validated through the simulation.