Abstract: Aiming at the problem of abnormal operation of three-phase pulse width modulation rectifier caused by factors such as voltage transformation and external conditions, a control strategy of active disturbance rejection control based on equivalent input disturbance error estimation and a new terminal fuzzy sliding mode current control is proposed. By analyzing the under-actuated characteristics of the PWM rectifier system, a new terminal fuzzy sliding mode control current loop controller based on equivalent input disturbance error estimation and an active disturbance rejection control voltage loop controller based on equivalent input disturbance error estimation are constructed. Double closed-loop structure controller. By estimating the error of current chattering and negative sequence current in sliding mode control, the accuracy of the controller is improved and the control effect is optimized. Suppress the harmonic of the voltage loop controller system, improve the response rate of the voltage, and ensure the stable operation of the PWM rectifier under interference. Finally, the effectiveness and superiority of the proposed control strategy are verified by simulation experiments.

Key words: PWM rectifier, Underactuated, Equivalent input disturbance, Terminal sliding control, Active disturbance rejection control, Fuzzy control