Method for controlling a wind turbine during shutdown
AssigneeVestas Wind Systems A/S
InventorsKeld Hammerum, Thomas Krüger
Life of this patent
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Abstract
A method for controlling an individually pitched wind turbine during shutdown is disclosed, the wind turbine comprising at least three wind turbine blades (1a, 1b, 1c). In response to a shutdown command for stopping operation of the wind turbine, a blade parameter of each of the wind turbine blades (1a, 1b, 1c), e.g. pitch angle, bending moment or blade acceleration, is determined. The blade parameters of the wind turbine blades (1a, 1b, 1c) are compared, and a shutdown strategy for the wind turbine is selected from a group of two or more predefined shutdown strategies, based on the comparing step. Finally, the wind turbine blades (1a, 1b, 1c) are moved towards a feathered position in accordance with the selected shutdown strategy.
Claims15
A method for controlling an individually pitched wind turbine during shutdown, said wind turbine comprising at least three wind turbine blades, the method comprising:
- receiving a shutdown command for stopping operation of the wind turbine,
- determining a blade parameter of each of the wind turbine blades,
- comparing the blade parameters of the wind turbine blades,
- selecting a shutdown strategy for the wind turbine from a group of two or more predefined shutdown strategies, based on the comparing, and
- moving the wind turbine blades towards a feathered position in accordance with the selected shutdown strategy.
A control unit for controlling pitch angles of an individually pitched wind turbine, the wind turbine comprising at least three wind turbine blades, the control unit comprising an input adapted to receive a shutdown command for stopping operation of the wind turbine;
- the control unit further comprising a processor configured to perform an operation comprising:
- determining a blade parameter of each of the wind turbine blades;
- comparing the blade parameters of the wind turbine blades;
- selecting a shutdown strategy for the wind turbine from a group of two or more predefined shutdown strategies, based on the comparing;
- and
- moving the wind turbine blades towards a feathered position in accordance with the selected shutdown strategy.
An individually pitched wind turbine comprising:
- a tower;
- a nacelle disposed on the tower;
- a rotor extending from the nacelle, and having a hub disposed on a distal end;
- at least three wind turbine blades coupled to the hub;
- and
- a control unit comprising an input adapted to receive a shutdown command for stopping operation of the wind turbine;
- the control unit further comprising a processor configured to perform an operation comprising:
- determining a blade parameter of each of the wind turbine blades;
- comparing the blade parameters of the wind turbine blades;
- selecting a shutdown strategy for the wind turbine from a group of two or more predefined shutdown strategies, based on the comparing;
- and
- moving the wind turbine blades towards a feathered position in accordance with the selected shutdown strategy.
Dependencies are inferred from the claim text.