Control strategy of three-phase PWM rectifier based on improved double closed loop sliding mode control

In order to solve the problems of low dynamic response performance and low anti-interference performance of three-phase PWM rectifier under conventional control mode, the project plans to design a new double-closed-loop sliding mode controller with sliding mode control in both the outer loop and the inner loop, and improve the convergence of the sliding mode inner loop. This control strategy can effectively improve the convergence speed of the system and effectively suppress the jitter of the system; The improved PID controller is compared with the double closed-loop PID controller and the conventional index controller, and it is concluded that the improved PID controller is superior to the conventional double closed-loop PID controller and the conventional index controller in response speed, buffeting suppression effect, anti-interference and harmonic suppression.