Abstract: In order to improve the rectification performance of the converter of the doubly-fed wind turbine at the grid side,a nonlinear PD control method with active-disturbancerejection structure is improved. First,the grid-side converter model of the doubly-fed wind turbine is built and the discrete PID controller is used as the current regulator to suppress the grid-side DC voltage oscillation to a certain extent. Based on the nonlinear expansion observer and combined with a PD form nonlinear combined controller,a grid-side converter based on the active disturbance rejection structure is obtained. The simulation suggests that in case of a single-phase voltage drop in the grid,the proposed method can reduce the ripple voltage of DC voltage at the grid-side,and enhance the DC voltage stabilization capability of the doubly-fed induction generator,and shorten the time of rectification,and improve the response speed of the doubly-fed induction generator. Therefore,the rationality and effectiveness of this active-disturbance-rejection PD controller have been verified and suitable for engineering applications.