Adaptive Individual Blade Pitch Control for Large Wind Turbines with LiDAR Measurement of Wind Speed

摘要

With the increase in size of wind turbines, the rotor radius and hence length of the wind turbine blade is increasing significantly. These blades cannot be made stiff because it will significantly increase their weight due to their large size. Therefore, the blade becomes more flexible and hence more prone to fatigue damage with the increase in size. In this paper, an adaptive individual blade pitch controller is proposed to reduce the asymmetrical loading in wind turbine blades due to vertical wind shear. The horizontal hub-height wind speed and the vertical wind shear, which are required parameters to design the controller, are assumed to be measured using a LiDAR. The performance of the proposed controller is compared with the existing baseline controller using the simulation results from NREL's 5 MW wind turbine model.