US 12,110,872 B2
Method for de-icing at least one rotor blade of a wind power installation
Muhanad Mahmoud, Aurich (DE); and Jochen Stemberg, Aurich (DE)
Assigned to Wobben Properties GmbH, Aurich (DE)
Filed by Wobben Properties GmbH, Aurich (DE)
Filed on Jun. 28, 2023, as Appl. No. 18/343,468.
Claims priority of application No. 22182350 (EP), filed on Jun. 30, 2022.
Prior Publication US 2024/0003336 A1, Jan. 4, 2024
Int. Cl. F03D 7/00 (2006.01); F03D 7/02 (2006.01); F03D 80/40 (2016.01)
CPC F03D 80/40 (2016.05) [F03D 7/0276 (2013.01); F03D 7/028 (2013.01); F05B 2270/32 (2013.01); F05B 2270/323 (2013.01); F05B 2270/325 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method comprising:
de-icing at least one rotor blade of a rotor of a wind power installation, wherein the rotor is able to be operated at a variable rotating speed and the wind power installation generates an output from wind, the de-icing comprising:
checking for an icing situation on the at least one rotor blade; and
changing from a normal operation of the wind power installation without de-icing to a de-icing operation when an icing situation has been identified;
wherein in the de-icing operation:
the at least one rotor blade is heated for de-icing; and
the rotating speed and/or the generated output are reduced as a function of at least one environmental condition of the wind power installation;
wherein the at least one environmental condition is selected from the list including:
an external temperature of the wind power installation; and
a wind speed in a region of the wind power installation
wherein in a partial-load operation, when the wind speed is below a nominal wind speed, the rotating speed increases as the wind speed increases, wherein:
the wind speed dependent increase in the de-icing operation has a smaller gradient than in the normal operation; and/or
in the de-icing operation, the wind speed dependent increase has a smaller gradient:
the higher a degree of icing; and/or
the lower the external temperature.