Active Disturbance Rejection Control Based on Linear Extended State Observer for Three-phase PWM Rectifier

A modified control strategy for three-phase PWM rectifier applied in a large-scale electric vehicles battery charging station is presented in this paper based on linear the linear active disturbance rejection control (LADRC) method. The voltage loop and the inner current loop are designed according to the control law of LADRC. Involving active disturbance rejection control improves the anti-interference ability of the rectifier system, which is conducive to the stable operation of the system. On the other hand, LADRC can alleviate the problem of parameter tuning caused by nonlinear characteristics, which is convenient for practical engineering applications. By simulating the rectifier under different conditions, the LADRC control strategy of this paper is proved to possess better control performance and anti-interference ability. In addition, the experimental results show that the feasibility and correctness of the presented control method.