Advanced control of wind turbine system

Wind turbines are complex and nonlinear dynamic systems driven by stochastic wind disturbances together with gravitational, centrifugal and gyroscopic forces. The aerodynamic of wind turbines is nonlinear, unsteady and complex. The rotor of a wind turbine is subjected to complicated turbulent wind inflow and periodic gravity loading that drives fatigue loads. The rotation of rotor adds even more complexity to the dynamic model. Hence, wind turbine modeling is challenging and complex. The design of control algorithms for wind turbines must account for these complexities. The models used for control design purposes must contain enough degrees of freedom (DOFs) to capture the most important turbine dynamics without being too complex.