Damping vibrations in a wind turbine

A method for damping vibration in a wind turbine including a plurality of aerodynamic devices for influencing an airflow flowing from a leading edge of a rotor blade of the wind turbine to a trailing edge of the rotor blade, each aerodynamic device being movable by an actuator between a first protruded configuration and a second retracted configuration, the method comprising:

• measuring vibrations in the wind turbine;
• if the measured vibrations are greater than a predefined threshold within a predefined frequency band, moving a portion of the aerodynamic devices to the second retracted configuration and continuing to measure vibrations in the wind turbine;
• if the measured vibrations are still greater than the predefined threshold within the predefined frequency band, reducing a pitch angle interval of the rotor blade and continuing to measure vibrations in the wind turbine;
• and
• if the measured vibrations are still greater than the predefined threshold within the predefined frequency band, moving all the aerodynamic devices to the second retracted configuration.