Time and Frequency Analysis of Circulating Currents on Input-Parallel-Output-Parallel Dual Active Bridge Converter

This paper proposes an analysis of the circulating current in parallel-connected Dual-Active Bridge (DAB) convert-ers considering mismatches in their component values. The study is performed in both time and frequency domains to address its influence on the converter performance. Those analyses are conducted in PLECS (Piecewise Linear Electrical Circuit Simulation) and SPICE (Simulation Program with Integrated Circuit Emphasis)-based softwares. Finally, the proposed method to attenuate the circulation of the current between DABs is presented.