Patent ID: 11879437
Assignee: WOBBEN PROPERTIES GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 10:
11. A method for controlling heating of rotor blades of an aerodynamic rotor of a wind turbine, the method comprising:
evaluating if icing of the rotor blades is expected, wherein evaluating if icing of the rotor blades is expected is based on an icing criteria that includes a determined ambient temperature, a determined relative humidity, and a determined wind speed, and
initiating heating the rotor blades if icing of the rotor blades is expected,
wherein each of the determined ambient temperature, the determined relative humidity, and the determined wind speed define a weather parameter,
wherein according to the icing criteria, icing is expected depending on a temporal change of at least one of the weather parameters,
wherein the heating is initiated by a preheating time period in advance of an expected icing such that at least portions of the rotor blades are heated up to a target temperature before the icing is expected to occur,
wherein the preheating time by which the heating is initiated in advance of the expected icing, is adapted during operation, and
wherein the preheating time is decreased by a predetermined time step, each time heating is initiated, until energy losses due to icing exceed a predefined value.