Grid synchronisation enhancement of a wind driven DFIG using adaptive sliding mode control

Grid synchronisation enhancement of a wind driven doubly fed induction generator (DFIG) using adaptive sliding mode control is described and evaluated in this study. The proposed scheme directly controls the stator terminal voltage of the DFIG to track the grid voltage without current control loop; hence, the structure of controller is simplified. For robustness of the control scheme, parametric uncertainty and external disturbances are included into the formed design procedure. A mathematical model of the DFIG as influenced by core-loss is considered to improve the theoretical prediction. Digital simulations are carried out to demonstrate the effectiveness and robustness of the proposed scheme using MATLAB/Simulink software package. Moreover, to validate the correctness and accuracy of the proposed schemes the calculated performances are compared with those results measured experimentally in the literature.