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US 8,202,048 B2Granted
Method of operating a wind turbine and wind turbine
AssigneeSiemens Aktiengesellschaft
InventorsHenrik Stiesdal, Martin Winther-Jensen
Life of this patent
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Abstract
The invention concerns a method of operating a wind turbine, wherein for a reduction of a wind load impacting on the wind turbine the rotational speed of the rotor and/or the electrical power output of the wind turbine are reduced depending on a deviation of the wind speed from the average wind speed. Moreover the invention concerns a wind turbine comprising a calculating unit adjusted for executing the inventive method.
Claims14
A method of operating a wind turbine having a rotor, comprising:
- determining a wind speed;
- determining an average wind speed;
- determining a deviation of the wind speed from the average wind speed;
- comparing the deviation of the wind speed with a threshold value;
- and
- when the deviation of the wind speed from the average wind speed attains or exceeds a threshold value reducing
- a rotor rotational speed, or
- an electrical power output of the wind turbine or
- both the rotor rotational speed and the electrical power output of the wind turbine as a function of the deviation of the wind speed from the average wind speed.
6 more elements
A wind turbine, comprising:
- a tower;
- a nacelle arranged upon the tower, wherein the tower supports the nacelle;
- a rotor rotatably arranged within the nacelle, wherein the rotor has a hub and a plurality of pitch controlled rotor blades;
- an electric generator connected to and driven by the rotor;
- a measuring device that measures a wind speed;
- and
- a calculating unit that:
- determines an average wind speed;
- determines a deviation of the wind speed from the average wind speed;
- compares the deviation of the wind speed with a threshold value;
- and
- when the deviation of the wind speed from the average wind speed attains or exceeds a threshold value, reduces
- a rotor rotational speed, or
- an electrical power output of the wind turbine or
- both the rotor rotational speed and the electrical power output of the wind turbine as a function of the deviation of the wind speed from the average wind speed.
12 more elements
Dependencies are inferred from the claim text.