Method for detecting a blade misalignment of a rotor blade of a rotor of a wind turbine

A method for correcting at least one blade misalignment of a rotor blade of a rotor of a wind turbine having multiple rotor blades that have adjustable blade angles,

• wherein
• the blade misalignment represents a blade angle deviation of a detected blade angle of the rotor blade from a reference blade angle, and
• the wind turbine includes a gondola having the rotor and an azimuth adjustment device for adjusting the gondola in an azimuth alignment having an azimuth angle, and
• wherein the method comprises:
• to adjust the azimuth alignment, tracking, by the azimuth adjustment device, the azimuth angle to a predeterminable azimuth setpoint angle;
• detecting the blade misalignment as a function of an azimuth movement of the gondola;
• and
• for each rotor blade,
• determining a correction angle as a function of the respective detected blade misalignment;
• and
• correcting the blade angle using the correction angle, or comparing a detected blade misalignment to a predeterminable deviation limiting value and generating an error or warning message if an absolute value of the detected blade misalignment is greater than the deviation limiting value.

A wind turbine having a rotor having multiple rotor blades that have adjustable blade angles, wherein

• the wind turbine includes a gondola having the rotor and an azimuth adjustment device in order to adjust the gondola in an azimuth alignment having an azimuth angle,
• to adjust the azimuth alignment, the azimuth angle is tracked by means of the azimuth adjustment device to a predeterminable azimuth setpoint angle, and
• the wind turbine includes a controller configured to:
• detect a blade misalignment as a function of an azimuth movement of the gondola, wherein the blade misalignment represents a blade angle deviation of a detected blade angle of the rotor blade from a reference blade angle.