Controlling the yaw to reduce motor speed
AssigneeVestas Wind Systems A/S
InventorsPeter Fynbo, Jesper Lykkegaard Neubauer, Jens-Kristian Egsgaard Langkjær, Niels Henrik Pedersen
Life of this patent
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Abstract
Techniques for controlling the yaw of a wind turbine system by controlling a plurality of yaw drive actuators. When the yaw drive actuators are applying the same torque to all the motors, this can lead to some motors overspeeding, if the motor is not engaged when the yaw system is activated. Therefore, if the actual motor speed reference of a yaw drive actuator is higher than a specific motor speed reference, then an output signal to reduce the actual motor speed reference is applied to the yaw drive actuators with an actual motor speed reference higher than the specific motor speed reference.
Claims16
A method for controlling the yaw of a wind turbine system, the wind turbine system comprises a nacelle, a tower, a turbine controller and a yaw system, the yaw system is operable to rotate the nacelle with respect to the tower, the yaw system comprises a motor controller and a plurality of yaw drive actuators, the method, comprising:
- receiving, by the motor controller, an actual motor speed reference of each yaw drive actuator,
- receiving, by the motor controller, a mean motor speed reference of the plurality of yaw drive actuators or a subset of the plurality of yaw drive actuators, and
- upon determining that the actual motor speed reference of one or more yaw drive actuators of the plurality of yaw drive actuators is higher than a specific motor over-speed reference corresponding to a sum of a threshold value and the mean motor speed reference, applying an output signal, to the one or more yaw drive actuators, to reduce the actual motor speed reference of the one or more yaw drive actuators.
A control system for controlling the yaw of a wind turbine system comprising a nacelle, a tower, and a yaw system operable to rotate the nacelle with respect to the tower;
- wherein the control system comprises:
- an input/output (I/O) interface;
- and
- one or more processors communicatively coupled to the (I/O) interface, and programmed to perform an operation, comprising:
- receiving, by a motor controller of the yaw system, an actual motor speed reference of each of a plurality of yaw drive actuators of the yaw system;
- receiving, by the motor controller, a mean motor speed reference of the plurality of yaw drive actuators or a subset of the plurality of yaw drive actuators;
- and
- upon determining that the actual motor speed reference of one or more yaw drive actuators of the plurality of yaw drive actuators is higher than a specific motor over-speed reference corresponding to a sum of a threshold value and the mean motor speed reference, applying an output signal, to the one or more yaw drive actuators, to reduce the actual motor speed reference.
A wind turbine system, comprising:
- a tower;
- a nacelle disposed on the tower;
- a yaw system operable to rotate the nacelle with respect to the tower, wherein the yaw system comprises a motor controller and a plurality of yaw drive actuators;
- and
- a control system configured to perform an operation, comprising:
- receiving, by the motor controller, an actual motor speed reference of the yaw drive actuators of the yaw system;
- receiving, by the motor controller, a mean motor speed reference of the plurality of yaw drive actuators or a subset of the plurality of yaw drive actuators;
- and
- upon determining that the actual motor speed reference of one or more yaw drive actuators of the plurality of yaw drive actuators is higher than a specific motor over-speed reference corresponding to a sum of a threshold value and the mean motor speed reference, applying an output signal, to the one or more yaw drive actuators, to reduce the actual motor speed reference.
Dependencies are inferred from the claim text.