Rotor blade deflection control using active rotor blade add-on
AssigneeSiemens Gamesa Renewable Energy A/S
InventorsThomas Esbensen, Gustav Hoegh
Life of this patent
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Abstract
A method of controlling at least one adaptable airflow regulating system, in particular spoiler and/or flap, of at least one rotor blade of a wind turbine having a wind turbine tower includes: determining a quantity related to a distance between the rotor blade and the wind turbine tower; controlling the airflow regulating system based on the quantity.
Claims14
A method of controlling at least one adaptable airflow regulating system, of a rotor blade of a wind turbine having a wind turbine tower, the method comprising:
- determining a quantity related to a distance between the rotor blade and the wind turbine tower;
- controlling the airflow regulating system based on the quantity,
- wherein controlling the airflow regulating system comprises:
- adapting the airflow regulating system such that an aerodynamic lift in at least a portion of the rotor blade is decreased, if the quantity is below a first threshold,
- wherein controlling the airflow regulating system includes moving position and/or orientation of an aerodynamically active surface of the airflow regulating system relative to an airfoil portion of the rotor blade,
- the method further comprising, if the distance related quantity is below a second threshold:
- additionally controlling a further airflow regulating system of at least one further rotor blade based on the distance related quantity,
- wherein the second threshold is smaller than the first threshold.
An arrangement for controlling an adaptable airflow regulating system of a rotor blade of a wind turbine having a wind turbine tower, the arrangement being adapted:
- to determine a quantity related to a distance between the rotor blade and the wind turbine tower;
- and
- to control the airflow regulating system based on the quantity,
- wherein controlling the airflow regulating system comprises:
- adapting the airflow regulating system such that an aerodynamic lift in at least a portion of the rotor blade is decreased, if the quantity is below a first threshold,
- wherein controlling the airflow regulating system includes moving position and/or orientation of an aerodynamically active surface of the airflow regulating system relative to an airfoil portion of the rotor blade,
- wherein, if the distance related quantity is below a second threshold, an airflow regulating system of at least one further rotor blade is additionally controlled based on the distance related quantity,
- wherein the second threshold is smaller than the first threshold.
A method of controlling an airflow regulating system of a rotor blade of a wind turbine having a wind turbine tower, wherein the airflow regulating system comprises a flap and/or a spoiler, and wherein the airflow regulating system is different from a pitch angle changing system, the method comprising:
- determining a quantity related to a distance between the rotor blade and the wind turbine tower;
- controlling the airflow regulating system based on the quantity, wherein controlling the airflow regulating system comprises:
- adapting the airflow regulating system such that an aerodynamic lift in at least a portion of the rotor blade is decreased, if the quantity is below a first threshold,
- additionally controlling a further airflow regulating system of at least one further rotor blade based on the distance related quantity, if the distance related quantity is below a second threshold, wherein the second threshold is smaller than the first threshold.
Dependencies are inferred from the claim text.