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.

Abstract: A method of calibrating a yaw system of a wind turbine is provided, the method including steps of performing a yaw event at a yaw event time in a clockwise direction and a counter-clockwise direction, calculating absolute errors which are the differences between an experimental performance parameter difference and a theoretical performance parameter difference of the yaw events in the clockwise direction and a counter-clockwise direction; adding up the absolute errors to obtain a total error; determining a minimum of the total error; and determining a yaw misalignment based on the minimum error.