Sliding mode control of bi-directional dual active bridge DC/DC converters for battery energy storage systems

In this paper, a double integral sliding mode control (DSMC) of bidirectional isolated dual active bridge (DAB) DC/DC converters is proposed for battery energy storage systems (BESS). A mathematical model for nonlinear control design is derived, which is based on the harmonic model of the DAB converter with the single phase-shift modulation (SPSM). The proposed control method can provide the zero steady-state error for the reference tracking. Moreover, the SMC can provide the fast responses without any overshoot or undershoot. The validity of the proposed control scheme has been verified by experimental results.