Input impedance modeling of dual active bridge converter based on peak current control

Dual active bridge converter based peak current control(PCC-based DAB) can effectively avoid transformer magnetic saturation. At present, the input impedance model of PCC-Based DAB converter has not been studied, which may cause potential stability problems when it is used as a load converter. To fill the gap, a full-order small-signal input impedance model for PCC-Based DAB converter is proposed. Then, the proposed input impedance model is used to analyze and predict the stability of the LC-DAB cascade system. Finally, the input impedance is measured by simulation, and the stability analysis and prediction are verified by simulation. The results prove the correctness and effectiveness of the proposed input impedance model of PCC-Based DAB converter.