Fuzzy Sliding Mode controls of Active and Reactive Power of a DFIG and Variable Speed Wind Energy conversion

In this paper an indirect vector control using fuzzy sliding mode control is proposed for a double-fed inductiongenerator (DFIG), applied for a wind energy conversion system in variable speed. The objective is to independentlycontrol the active and reactive power generated by the DFIG, which is decoupled by the orientation of the flux. Thesliding mode control finds its strongest justification for the problem concerning the use of a robust nonlinear controllaw for the model uncertainties. As far as the fuzzy mode control is concerned, it aims at reducing the chattering effect.The obtained results show the increasing interest of such control in this system. In this study, fuzzy sliding-modecontrol (FSMC) method, which is one of the active control algorithms, has been applied for a double-fed inductiongenerator (DFIG). The chattering effect, the major disadvantage of conventional sliding-mode controller, has beenremoved by introducing FSMC without losing the robustness against parametric uncertainties, modeling inaccuraciesand varying dynamic loads. For realizing the intelligent pitch controller, fuzzy sliding mode control, which combinesfuzzy sliding mode control and self-organizing modifier, is proposed.

Keywords:

Wind Energy , Doubly fed induction generator , Fuzzy Sliding Mode Control Sliding Mode control , PI