DAB converter current limiting control method based on prediction model

The invention relates to a DAB converter current limiting control method based on a prediction model. A reference voltage Vref and an output voltage Vout pass through a voltage compensator GV to obtain a phase shift signal pk; the digital controller obtains the input voltage Vin and the output voltage Vout of the converter, the phase shift angle pk of the current switching period is combined, a load current prediction model is used for predicting load current, and a load current prediction result Io (pre) is obtained; a current limit value and a load current prediction result Io (pre) pass through a current limiting compensator G1, G1 output is superposed on an output voltage sampling signal Vout, a phase shift angle pk + 1 is further obtained through a voltage compensator Gv, the phase shift angle pk + 1 is converted into a switching signal for driving a primary and secondary side switching tube through a PWM modulation module, and current limiting control over the converter is achieved. In this way, current