Anti-Disturbance Full-Order Sliding Mode Control of PMSG-Based Wind Energy Conversion Systems

Considering the uncertainty and multi-disturbance in wind energy conversion system (WECS) and the randomness and instability of the wind power, a full-order sliding mode control (FOSMC) strategy based on an extended state observer (ESO) is proposed for the permanent magnet synchronous generator (PMSG)-based WECSs. First, based on the active disturbance rejection control (ADRC) theory, an ESO is developed to estimate the unknown states, uncertainties in the internal machine parameters and external torque disturbance. Second, a full-order sliding mode controller is designed to ensure the convergence of all system states with much reduced chattering phenomenon. Finally, the effectiveness of the proposed ESO-based FOSMC is confirmed by simulation results. The proposed FOSMC strategy will improve the efficiency and the reliability of the WECS.