Approach law sliding mode control method of matrix rectifier

The invention relates to an approach law sliding mode control method of a matrix rectifier. The method comprises the following steps that: direct-current output voltage V0 is detected in real time and compared with objective expected voltage Vref to obtain deviation, an exponential approach law sliding mode control method is adopted so that the direct-current output voltage is quickly close to an expected value and buffeting is weakened. Meanwhile, side voltage and current of a matrix rectifier network can be detected in real time, the phase difference is calculated, and angle compensation is executed by an uniform-speed approach law sliding mode controller so that the power factor is close to one. Closed-loop control is executed to direct current output voltage and side network power factors by using the approach law sliding mode control method, thus the approach law sliding mode control method is strong in robustness, insensitive in internal parameter change and external disturbance, and excellent in dynamic property.