Modelling and Sliding Mode Control of DFIG-Based Wind Turbines

Wind power based on doubly fed induction generators (DFIGs) is essential for efficient, environmentally friendly electricity generation. DFIG technology optimises variable speed power generation while ensuring grid stability. Sliding mode control (SMC) enhances these systems through its robustness to uncertainties, providing precise control of active and reactive power, thus improving stability, energy efficiency, and overall system reliability. Against this context, this chapter presents a non-linear SMC strategy applied to a DFIG in the wind power generation chain. The models of all the parts involved in the turbine and the corresponding control strategy are then introduced, where the control of the turbine, which implements the maximum power extraction from the wind, is presented. The principles of field-oriented control (FOC) based on the proportional-integral (PI) controller are then presented, before the SMC technique is applied to the wind turbine system. Finally, the results of our research are analysed and interpreted.