Wind turbine, yaw control device, and operation control method
AssigneeMitsubishi Heavy Industries, Ltd.
InventorMitsuya Baba
Life of this patent
Estimating the term…
Abstract
A wind turbine includes: a wind turbine rotor; a nacelle supporting the wind turbine rotor rotatably; a yaw rotation part configured to rotate the nacelle; and a yaw control part configured to operate the yaw rotation part in a yaw rewind mode of rotating the nacelle in such a direction that a yaw angle changes toward zero, if an absolute value of the yaw angle exceeds a threshold which is variable in accordance with a wind-velocity parameter representing a magnitude of a wind velocity. The threshold increases with an increase in the wind-velocity parameter.
Claims13
A wind turbine comprising:
- a wind turbine rotor;
- a nacelle supporting the wind turbine rotor rotatably;
- a yaw rotation part configured to rotate the nacelle;
- and
- a yaw control part configured to operate the yaw rotation part in a yaw rewind mode of rotating the nacelle in such a direction that a yaw angle changes toward zero, if an absolute value of the yaw angle exceeds a threshold which is variable in accordance with a wind-velocity parameter representing a magnitude of a wind velocity,
- wherein the threshold increases with an increase in the wind-velocity parameter, and
- the yaw control part is configured to:
- in the rewind mode, change the yaw angle to within a predetermined angular range without making the nacelle follow a wind direction when the wind-velocity parameter is less than the threshold;
- and
- in the rewind mode, change the yaw angle until an absolute value of the yaw angle reaches 180 degrees or less and the nacelle follows the wind direction when the wind-velocity parameter is not less than the threshold.
A method of controlling operation of a wind turbine which comprises a wind turbine rotor, a nacelle supporting the wind turbine rotor rotatably, and a yaw rotation part configured to rotate the nacelle, the method comprising:
- a step of operating the yaw rotation part in a yaw rewind mode of rotating the nacelle in such a direction that a yaw angle changes toward zero, if an absolute value of the yaw angle exceeds a threshold which is variable in accordance with a wind-velocity parameter representing a magnitude of a wind velocity,
- wherein the threshold increases with an increase in the wind-velocity parameter, and
- the step of operating the yaw rotation part includes:
- changing the yaw angle to within a predetermined angular range without making the nacelle follow a wind direction when the wind-velocity parameter is less than the threshold;
- and
- changing the yaw angle until an absolute value of the yaw angle reaches 180 degrees or less and the nacelle follows the wind direction when the wind-velocity parameter is not less than the threshold value.
Dependencies are inferred from the claim text.