Modeling Research of Dual Active Bridge DC Converter Based on Double Phase Shift Control

In order to facilitate the closed-loop controller design of the dual active bridge DC converter, the generalized state space averaging method is proposed to model the dual active bridge base dual-phase-shift control, and the large- and small-signal averaging-value model is obtained. Through the Fourier analysis of the inductor current and the compare of the large-signal model, small-signal model with simulation experiment, It is concluded that the third-order generalized state space average model has sufficient accuracy. Finally, the PI control parameters are designed according to the established model to obtain the ideal response curve.