Control for Damping the Fatigue Relevant Deformation Modes of Offshore Wind Turbines
نویسندگان
چکیده
Damping of two deformation modes by one control loop has been demonstrated by simulation for a typcial 3 MW wind turbine. The vibration levels of the 2 and 3 in-plane modal modes were significantly reduced. Calculations with the aerodynamic code PHATAS showed an overall in-plane fatigue load reduction by ca 40%. The control loop includes a Kalman filter that estimates state variables for the modal modes. The states are obtained from band filtered generator speed measurents only. The state feedback to the generator torque is based on pole placement techniques.
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