Control system for aligning a nacelle of a wind turbine with a target yaw angle

A wind turbine comprising a tower, a nacelle mounted on the tower, a hub mounted to the nacelle, and blades mounted to the hub, the wind turbine further comprising a control system for aligning the nacelle of the wind turbine with a target yaw angle, the control system comprising:

• a detection device configured for detecting at least one parameter indicative of wind forces acting on at least one component of the wind turbine for determining a current yaw angle of the nacelle;
• and
• an actuation device configured for manipulating a position of the nacelle until the current yaw angle is aligned with the target yaw angle;
• wherein the detection device further comprises at least one first bending moment sensor on a first component of the wind turbine, and at least one second bending moment sensor on a second component of the wind turbine;
• wherein the detection device is further configured for determining a bending moment of the first component of the wind turbine based on data received from the first bending moment sensor as the at least one parameter indicative of wind forces acting on the at least one component of the wind turbine, and a bending moment of the second component of the wind turbine based on data measured by the second bending moment sensor;
• and
• wherein the detection device is further configured for cross-checking the bending moment of the first component of the wind turbine with the bending moment of the second component of the wind turbine.

A method for aligning a nacelle of a wind turbine with a target yaw angle, the method comprising:

• providing at least one first bending moment sensor on a first component of the wind turbine;
• providing at least one second bending moment sensor on a second component of the wind turbine;
• detecting at least one parameter indicative of wind forces acting on at least one component of the wind turbine for determining a current yaw angle of the nacelle, and
• manipulating a position of the nacelle until the current yaw angle is aligned with the target yaw angle;
• determining a bending moment of the first component of the wind turbine based on data received from the first bending moment sensor as the at least one parameter indicative of wind forces acting on the at least one component of the wind turbine, and a bending moment of the second component of the wind turbine based on data measured by the second bending moment sensor;
• and
• cross-checking the bending moment of the first component of the wind turbine with the bending moment of the second component of the wind turbine.