Method and arrangement for damping of tower-oscillations

Details Method and arrangement for damping of tower-oscillations Method and arrangement for damping of tower-oscillations

F - Mech Eng,Light,Heat,Weapons

16

F

F16F 15/18 (2006.01) F03D 11/00 (2006.01) F16F 15/10 (2006.01) H02K 7/18 (2006.01)

Patent

CA 2671714

The invention relates to a method and an arrangement for damping of tower-oscillations. According to the inventive method for damping of tower--oscillations a rotation is transformed into electrical power by a generator (M), which is located on top of the tower. The electrical power is transformed from AC to DC and back to AC by a converter (CONV). A power-reference-signal (PowerRef) is used by the converter (CONV) to control the delivered electrical power. A variable power-offset-signal (PowerOffset) is added to the power-reference-signal (PowerRef), before it is used for control. The variable power-offset-signal (PowerOff--set) is based at a mean value of the power-reference-signal (powerRef) and is based at a side-by-side-oscillation of the tower.

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