| 摘要 |
<p>A method for dampening oscillations in a wind turbine, the wind turbine having a tower 1, a rotor 3 arranged on the tower 1 such as to be able to rotate about an X axis, and a plurality of blades 4 with adjustable pitch mounted on the rotor, said method comprising monitoring the fore-aft oscillation of the tower 1 in the direction of the X axis, at the 2 nd or a higher bending mode frequency; determining a compensating torque to be applied by the rotor 3 to the tower 1 of the wind turbine about a Y axis, which is horizontal and at right angles to the X axis, for at least partly dampening said oscillation at the 2 nd or higher bending mode frequency; determining for each rotor blade 4 of the wind turbine an adjustment of the pitch angle suitable to generate said compensating torque about the Y axis; and adjusting the pitch angle ²1, ²2, ²3 of at least one of the individual blades 4 to generate at least part of said compensating torque.</p> |
