Method and device of calibrating a yaw system of a wind turbine to reduce fatigue and increase power
AssigneeSiemens Gamesa Renewable Energy A/S
InventorsThomas Esbensen, Jonas Weiss Gustavsen, Maxence Josso
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Abstract
A method of calibrating a yaw actuator of a wind turbine is provided, including steps of performing an active yaw operation in a clockwise yaw direction and an active yaw operation in a counter-clockwise yaw direction; recording data of a wind direction and a power caused by both yaw operations, and averaging the data and calculating an error between an experimental power difference and a theoretical power difference of yaw operations in the clockwise direction and a counter-clockwise direction; determining a minimum of the error; and determining a yaw misalignment based on the minimum error.
Claims12
A method of calibrating a yaw system of a wind turbine, the wind turbine comprising a rotor having a plurality of rotor blades, each blade being configured to be pitched by a pitch angle about a pitch axis of the blade, the rotor being mounted to a nacelle to rotate about a rotation axis with a rotor speed to drive a generator for producing electrical energy, the nacelle being mounted to a tower to rotate about a yaw axis, the method comprising:
- selecting a first predetermined time span before a yaw operation and a second predetermined time span after the yaw operation;
- performing a yaw operation in a clockwise yaw direction and a yaw operation in a counter-clockwise yaw direction;
- recording data of a wind direction and a performance parameter caused by both yaw operations, and averaging the data;
- determining a first experimental performance parameter in the first predetermined time span and a second experimental performance parameter in the second predetermined time span from the averaged data for each yaw operation in the clockwise yaw direction and the counter-clockwise yaw direction;
- calculating an experimental performance parameter difference between the first and second experimental performance parameters for each yaw operation in the clockwise yaw direction and the counter-clockwise yaw direction;
- determining a first wind direction in the first predetermined time span and a second wind direction in the second predetermined time span from the averaged data for each yaw operation in the clockwise yaw direction and the counter-clockwise yaw direction;
- calculating a first theoretical performance parameter in the first predetermined time span based on the determined first wind direction and a second theoretical performance parameter in the second predetermined time span based on the determined second wind direction for each yaw operation in the clockwise yaw direction and the counter-clockwise yaw direction;
- calculating a theoretical performance parameter difference between the first and second theoretical performance parameters for each yaw operation in the clockwise yaw direction and the counter-clockwise yaw direction;
- calculating absolute errors between the experimental performance parameter difference and the theoretical performance parameter difference of the yaw operations in the clockwise direction and a counter-clockwise direction, respectively;
- adding the absolute errors of the yaw operations in the clockwise direction and the counter-clockwise direction to obtain a total error;
- determining a minimum error of the total error;
- and
- determining a yaw misalignment based on the minimum error.
A device for calibrating a yaw system of a wind turbine, the wind turbine comprising a rotor having a plurality of rotor blades, each blade being configured to be pitched by a pitch angle about a pitch axis of the blade, the rotor being mounted to a nacelle to rotate about a rotation axis with a rotor speed to drive a generator for producing electrical energy, the nacelle being mounted to a tower to rotate about a yaw axis, the device comprising:
- a selecting unit for selecting a first predetermined time span before a yaw operation and a second predetermined time span after the yaw operation;
- a performing unit for performing a yaw operation in a clockwise yaw direction and a yaw operation in a counter-clockwise yaw direction;
- a recording unit for recording data of a wind direction and a performance parameter caused by both yaw operations, and averaging the data;
- a first determining unit for determining a first experimental performance parameter in the first predetermined time span and a second experimental performance parameter in the second predetermined time span from the averaged data for each yaw operation in the clockwise yaw direction and the counter-clockwise yaw direction;
- a first calculating unit for calculating an experimental performance parameter difference between the first and second experimental performance parameters for each yaw operation in the clockwise yaw direction and the counter-clockwise yaw direction;
- a second determining unit for determining a first wind direction in the first predetermined time span and a second wind direction in the second predetermined time span from the averaged data for each yaw operation in the clockwise yaw direction and the counter-clockwise yaw direction;
- a second calculating unit for calculating a first theoretical performance parameter in the first predetermined time span based on the deter-mined first wind direction and a second theoretical performance parameter in the second predetermined time span based on the determined second wind direction for each yaw operation in the clockwise yaw direction and the counter-clockwise yaw direction;
- a third calculating unit for calculating a theoretical performance parameter difference between the first and second theoretical performance parameters for each yaw operation in the clockwise yaw direction and the counter-clockwise yaw direction;
- a fourth calculating unit for calculating absolute errors between the experimental performance parameter difference and the theoretical performance parameter difference of the yaw operations in the clockwise direction and a counter-clockwise direction, respectively;
- an adding unit configured to add the absolute errors of the yaw operations in the clockwise direction and the counter-clockwise direction to obtain a total error
- a third determining unit for determining a minimum error of the total error;
- and
- a fourth determining unit for determining a yaw misalignment based on the minimum error.
Dependencies are inferred from the claim text.