Vestas Wind Systems A/s

Anders Brohm

Børge Øllgaard

Søren Bøgelund Madsen

Søren Poul Jensen

Tue Hald

Casper Lyngsø

Shougang Qu

Søren P Jensen

A method of forming a wind turbine foundation includes providing an anchor cage in an excavation pit, the anchor cage including an upper flange, a lower flange, and a plurality of anchor bolts extending therebetween. A first cementitious material is directed into the excavation pit so that the anchor cage becomes at least partially embedded in the material, which is allowed to cure to form a rigid body. A connecting element is selectively engaged with the upper flange and an actuating element is positioned in operative relation with the connecting element, the connecting and actuating elements positioned in non-contact relation with the anchor bolts. The actuating element is actuated relative to the connecting element to raise the upper flange from the rigid body into a leveled position. A second cementitious material is directed into a space beneath the raised upper flange and is allowed to cure to form a support layer.

System for forming a wind turbine foundation

The invention relates to a method and a wind turbine system reducing, preventing or mitigating vibrations due to wind induced vibrations. The wind turbine system includes a wind turbine tower, a sensor arrangementfor sensing vibrations of the wind turbine tower, a nacellemounted to the wind turbine tower via a yaw bearingand a control systemfor controlling yawing of the nacelle relative to the wind turbine tower. The system is adapted for sensinga vibration of the wind turbine tower using the sensor arrangement, providingan input for the control system in response to the vibration of the wind turbine tower as sensed by the sensor arrangement, and providingan output by the control system based on the input, and yawingthe wind turbine nacelle based on the output from the control system, and hereby reducing wind induced vibrations of the tower and nacelle, particularly vortex induced vibrations and/or vibrations due to galloping.

Active yaw mitigation of wind induced vibrations

Method for forming a wind turbine foundation and related system for forming such a foundation

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Frederiksberg C, Denmark

Anders Brohm