A method for starting a wind turbine with hinged wind turbine blades
AssigneeVestas Wind Systems A/S
InventorsThomas S. Bjertrup NIELSEN, Peter Bjorn ANDERSEN, Soren DALSGAARD, Kim Hylling SORENSEN
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Abstract
A method for starting a wind turbine with hinged wind turbine blades, the wind turbine further comprising an adjustable biasing mechanism arranged to apply an adjustable biasing force to each wind turbine blade which biases the wind turbine blade towards a position defining a minimum pivot angle. The biasing mechanism is adjusted to apply a predefined biasing force to each wind turbine blade, and the pivot angle of each wind turbine blade is monitored. The wind turbine is started in the case that the pivot angle of at least one wind turbine blade exceeds a predefined pivot angle threshold.
Claims18
A method for starting a production of electrical energy of a wind turbine after a period of not producing electrical energy, the wind turbine comprising a tower, a nacelle mounted on the tower via a yaw system, a hub mounted rotatably on the nacelle, the hub comprising a blade carrying structure, and one or more wind turbine blades connected to the blade carrying structure via a hinge, each wind turbine blade thereby being arranged to perform pivot movements relative to the blade carrying structure between a minimum pivot angle and a maximum pivot angle, the wind turbine further comprising an adjustable biasing mechanism arranged to apply an adjustable biasing force to each wind turbine blade which biases the wind turbine blade towards a position defining a minimum pivot angle, the method comprising:
- adjusting the biasing mechanism to apply a predefined biasing force to each wind turbine blade;
- monitoring the pivot angle of each wind turbine blade;
- and
- starting the wind turbine in the case that the pivot angle of at least one wind turbine blade exceeds a predefined pivot angle threshold.
A wind turbine, comprising:
- a tower;
- a nacelle disposed on the tower via a yaw system;
- a generator disposed in the nacelle;
- a rotor coupled to the generator;
- a hub mounted on the rotor and comprising a blade carrying structure;
- a plurality of wind turbine blades connected to the blade carrying structure via a hinge, each wind turbine blade thereby being arranged to perform pivot movements relative to the blade carrying structure between a minimum pivot angle and a maximum pivot angle;
- an adjustable biasing mechanism arranged to apply an adjustable biasing force to each wind turbine blade which biases the wind turbine blade towards a position defining a minimum pivot angle;
- one or more controllers configured to perform an operation starting a production of electrical energy of the wind turbine after a period of not producing electrical energy, the operation, comprising:
- adjusting the biasing mechanism to apply a predefined biasing force to each wind turbine blade;
- monitoring the pivot angle of each wind turbine blade;
- and
- starting the wind turbine when the pivot angle of at least one wind turbine blade exceeds a predefined pivot angle threshold.
Dependencies are inferred from the claim text.