Wind turbine control arrangement
AssigneeSiemens Gamesa Renewable Energy A/S
InventorsJohannes Gerhardes Wardjan Alberts, Bjarne Skovmose Kallesøe
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Abstract
A control arrangement for a variable-speed wind turbine includes a loading analysis module configured to analyse a number of environment values to establish whether the momentary wind turbine loading is lower than a loading threshold when the rotational speed of the aerodynamic rotor has reached its rated value; and a speed boost module configured to determine a speed increment for the rotational speed of the aerodynamic rotor if the wind turbine loading is lower than the loading threshold.
Claims14
A control arrangement for a variable-speed wind turbine constructed to fulfil requirements of a wind class as defined by IEC 61400-1, the control arrangement comprising.
- a loading analysis moduleconfigured to analyze a plurality of environment values to establish whether momentary wind turbine loading is lower than a loading threshold when a rotational speed of an aerodynamic rotor has reached a rated value wherein a rated speed is associated with a level of output power that is less than rated output power for a class of wind turbine;
- and
- a speed boost module configured to apply a speed increment to the rotational speed of the aerodynamic rotor if the wind turbine loading is lower than the loading threshold, and wherein a power/speed relationship follows an ideal trajectory for wind turbine type.
The control arrangement according to wherein the loading analysis moduleis configured to determine wake exposure of the wind turbine and to enable, on basis of the wake exposure increase of rotational speed by the speed increment.
The control arrangement according to 1, wherein the speed boost module is configured to determine magnitude of a speed increment on abasis of an estimated turbulence level and/or an estimated load level.
A method of operating a variable-speed wind turbine, the method comprising:
- establishing whether a momentary wind turbine loading is lower than a loading threshold when a rotational speed of an aerodynamic rotor has reached arated speed wherein h e rated speed is associated with a level of p ,p output power that is less than a rated output power for a class of wind turbine;
- determining a speed increment for the rotational speed of the aerodynamic rotor on basis of an ideal power/speed trajectory of the wind turbine if the wind turbine loading is lower than the loading threshold;
- and
- increasing a rotor speed by the speed increment.
The method according to further comprising identifying wake exposure of the wind turbine.
Dependencies are inferred from the claim text.