Vibration damping method of a wind turbine tower and control system for wind turbines

摘要

Tower vibration damping method of a wind turbine (100) that is equipped with rotor blades, a step controller (13, 113) and a step drive system, adjusting the pitch of the rotor blades, which It comprises the steps of: - providing a speed reference value for the rotor speed; - provide a rotor speed value representing the rotor speed; and - establish a modification value that represents a modification that must be made in the speed reference value to take into account tower vibrations; - use the modification value to modify the speed reference value to establish a modified speed reference value; - determining a step reference value representing a step that the step drive system must adjust based on at least the difference between the modified speed reference value and the rotor speed value; - check the pitch angle of the rotor blades according to the pitch reference value.