METHOD AND APPARATUS FOR PROVIDING A PITCH ANGLE CORRECTION SIGNAL FOR AT LEAST ONE ROTOR BLADE OF A WIND POWER INSTALLATION

摘要

The present invention provides a method for providing a pitch angle correction signal for at least one rotor blade (300) of a wind power installation (102), wherein the wind power installation has at least one rotor blade, which can rotate about a rotor axis and a blade longitudinal axis, wherein a design rotor plane (806) covers an imaginary auxiliary plane essentially at right angles to the rotor axis. The method has a step of reading (900) a deflection signal (x1), which represents a current deflection of the rotor blade from the design rotor plane, wherein the rotor blade experiences variable deflections from the design rotor plane during a revolution about the rotor axis. The method (900) furthermore comprises a step of determining (902) a pitch angle correction signal (?f1) based on the deflection signal, wherein the pitch angle correction signal (?f1) is suitable for achieving a deflection of at least one rotor blade, which is approximately constant during a revolution about the rotor axis, when linked to a common pitch angle (f) for a plurality of rotor blades of the wind power installation.