Robust Power Regulation for Doubly Fed Induction Generator Based Wind Turbines

The recent proliferation of converter based wind turbine generators into the power grid has increase the risk of system stability issues. Thus, it is important to have a reliable control strategy for Doubly Fed Induction Generator based wind turbines to simultaneously provide frequency and power factor control. Due to the existence of various uncertainties coming from machine parameters, grid voltage and frequency fluctuations, and turbulence from wind signals a robust controller is preferred to handle these uncertainties. This paper proposes a robust output regulation control strategy that can handle the disturbances and track the required active and reactive power command signals in the presence of these uncertainties. Simulation results illustrate the effectiveness of the proposed control algorithm compared with the standard proportional integral control law.