Methods for assessing an incident flow on a rotor blade and for controlling a wind power installation and wind power installation.

摘要

The invention relates to a method for assessing an incident flow on a rotor blade (108) of a wind power installation (100), having the following steps: - detecting at least a part of a pressure spectrum of a pressure ( p), in particular the wall pressure, on the rotor blade 108 at at least one measuring position, - determine at least two characteristic values (p1, p2) from the pressure spectrum, - form an indicator value ( (i) from a relationship between at least two characteristic values (p1, p2), and - assess whether a critical incident flow (24) is present based on the indicator value (i).