Patent ID: 7456515
Filing Date: 2008-11-25
Classification: B63B,E02B,F03D,F05B,Y02E

Abstract:
1. A method of installing an offshore wind turbine comprising blades connected via a shaft to a generator, which is rotationally mounted on a tower, and a foundation underneath in the form of a float or hull on which the tower is mounted, the method comprising: anchoring the float via an anchor line, tether or link to a sea bed so that it floats freely; and adjusting the resonance period of the wind turbine by adjusting the center of gravity of the wind turbine and/or tension in the anchor line, tether or link so that the wind turbine oscillates in resonance with the waves, wherein as a consequence of the effect of waves on the float, the motion of the wind turbine acts as a damping mechanism on the motion and thus extracts energy from the waves.