Modeling and Control of DAB Converter Applied to Batteries Charging

For the connection of the generation system (renewable energy source utilization system) to the energy storage system (ESS), the use of a DC-DC converter with high voltage gain, bidirectionality in the power flow and galvanic isolation becomes necessary. In this paper, the dual active bridge (DAB) converter with topological modification in the output is used. The mathematical modeling of the converter is performed through two methods: the generalized average model and the output current linearization model. In addition, a comparative analysis between the methods is carried out and the design of current and voltage controllers for the DAB are developed applying the more reliable model. Finally, experimental results are presented.