DEVICE FOR IDENTIFYING AN ACCUMULATION OF ICE ON ROTOR BLADES OF A WIND TURBINE AND METHOD FOR TEACHING SUCH A DEVICE

摘要

The invention relates to a method for teaching a device (6) for identifying an accumulation of ice on at least one rotor blade (41) of a wind turbine (1), said method having the following steps: - determining operating and ambient conditions during operation of the wind turbine (1); - determining an electrical output of the wind turbine (1) that is to be expected under the operating and ambient conditions determined; - measuring an electrical output that is actually generated by the wind turbine (1); - comparing the expected electrical output of the wind turbine (1) with the electrical output actually generated by same; - depending on the result of the comparison, determining with a high level of probability whether the at least one rotor blade (41) is free of ice; and - detecting vibrations of the at least one rotor blade (41), deriving characteristic properties of the vibrations and storing the characteristic properties as a reference for the device (6) for identifying an accumulation of ice if, in the comparison, it was determined with a high level of probability that the at least one rotor blade (41) is free of ice. The invention also relates to a device for identifying an accumulation of ice on at least one rotor blade (41) of a wind turbine (1), which device is designed to carry out a method of this kind.