REN Li-na，QI Xin，LIU Shuang-shuang，LIU Fu-cai

（Key Lab of Industrial Computer Control Engineering of Hebei Province，Yanshan University，

Qinhuangdao 066004，China）

Abstract：Aiming at the problems of three-phase PWM rectifier system on rapidity and robustness，circuit topology and mathematical model were studied. Based on analyzing the working principle of linear active disturbance rejection controller（LADRC）strategy and component，a new integral linear active disturbance rejection controller（I-LADRC）has been proposed. The voltage and current could be controlled independently through the double closed loop control system based on coordinate transformation. In the control system，current inner loop was established on the basis of feedforward decoupling PI controller，and the voltage outer loop was based on I-LADRC. The switching signals were generated by space vector pulse width modulation（SVPWM）method. At last，confirmatory experiments were carried

out by Simulink in which the results of PI，LADRC and I-LADRC have been compared. The results indicate that the three-phase PWM

rectifier with I-LADRC which has no overshoot is rapid and robust。

Key words：PWM rectifier；integral linear active disturbance rejection controller（I-LADRC）；robustness；Simulink