Enhancing the Performance of the Output Active Power of DFIG-Based Wind Turbines Using Auto Disturbance Rejection Control

This study deals with the performance improvement of the output active power of a grid-connected double fed induction generator-based wind turbine (DFIG-WT). This can be achieved by reducing both the overall system losses and the system disturbances. Therefore, a novel control strategy based on a nonlinear auto disturbance rejection controller (NADRC), considering loss minimization (LM), is proposed to regulate the rotor current. Consequently, more power can be delivered to the grid and the attenuation capability of the output power disturbances can be increased. The proposed control technique is compared with the classical PI controller and the Linear ADRC (LADRC) on a DFIG-WT system using MATLAB/Simulink. The simulation results confirm the superiority of the proposed control scheme to deliver more power to the grid. In addition, its robustness against reference tracking capability, wind speed fluctuations, grid voltage dips, and parameters variations is verified.