Patent ID: 11959456
Assignee: GENERAL ELECTRIC RENOVABLES ESPANA, S.L.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 9:
10. A method for mitigating vibrations of a parked wind turbine, the method comprising:
arranging a vibration mitigating device on a blade of the wind turbine, the vibration mitigating device having one or more air flow modifying elements in a first configuration;
changing the air flow modifying elements from the first configuration to a second configuration;
wherein the first configuration is one of a retracted configuration or an extended configuration, and the second configuration is the other of the extended configuration or the retracted configuration;
wherein the vibration mitigation device includes a frame attachable to and having a fixed length in a span-wise direction of the wind turbine blade;
the air flow modifying elements are moved along the frame between the retracted configuration and the extended configuration; and
wherein in the retracted configuration the modifying elements extend between a blade tip and a blade root of the blade with a first spanwise length, and in the extended configuration the modifying elements extend between the tip end and the root end of the blade with a second, greater spanwise length.