A Novel Sliding Mode Control for the Speed Regulation in Permanent Magnet Synchronous Generators

Modern wind energy conversion systems equipped with permanent magnet synchronous generators (PMSG) require continuous adaptation of rotor blade rotational speed to the wind speed to maximize power generation. However, precise rotational speed regulation is challenged by abrupt wind speed variations, along with uncertainties and changes in the characteristic electromechanical parameters. This study presents an innovative sliding mode control technique based on a continuous reaching law to ensure a precise speed regulation of PMSGs avoiding typical chattering issues of more conventional discontinuous sliding mode techniques. The stability of the proposed controller is analytically demonstrated according to the Lyapunov stability theory. Simulation and experimental results are provided to illustrate the robustness of the proposed controller and its superiority to a more conventional discontinuous sliding mode controller.