1. Power ApparatusandSystems, Vol.103,pp.886-892. Finally, independent blade pitch control was introduced to regulate turbine speed and attenuate the effects of spatial variations of wind speed over the rotor disk (such as wind shear). A new disturbance was added to the DAC model to describe the dominant component of wind shear, the 1P component that has spatial variation over the rotor disk. A large reduction in blade-tip flap deflections was shown using this method. In addition, these control inputs stabilized the first flap mode of each blade, the first drive train torsion mode, and the tower first fore-aft mode.
2. [3]Mattson,S.E.,1984, Modeling and ControlofLarge Horizontal Axis Wind Power Plants. Ph.D Thesis. Lund,Sweden:DepartmentofAutomatic Control,Lund InstituteofTechnology.
3. Pitch control system for large-scale wind turbines