Method of operating a wind turbine

F - Mech Eng,Light,Heat,Weapons – 03 – D

Patent

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F03D 7/02 (2006.01) F03D 7/00 (2006.01) F03D 11/00 (2006.01)

Patent

CA 2508316

A wind turbine has a generator (7) with a connected rotor (3) having a hub (4) and blades (5) rotatably connected to the hub for adjusting the pitch angle. In a method of operating such a wind turbine under climatic conditions, where there is a risk of icing on the blades and no or weak wind, the generator is used as a motor for driving the rotor and the pitch angle of the blades is adjusted to ensure that the resulting wind substantially hits the leading edge of the blades. Any ice formed may be removed by means of de-icing in a known manner.

L'invention concerne une éolienne, qui comprend un générateur (7) muni d'un rotor connecté (3) présentant un moyeu (4) et des ailettes (5) reliées de manière rotative au moyeu pour régler l'angle d'inclinaison longitudinale. Dans un procédé de mise en oeuvre de ladite éolienne, dans des conditions climatiques où il existe des risques de formation de givre sur les ailettes et où le vent est inexistant ou faible, le générateur est utilisé comme moteur pour entraîner le rotor, et l'angle d'inclinaison longitudinale des ailettes est réglé de sorte que le vent résultant heurte sensiblement le bord d'attaque des ailettes. En cas de formation de givre, celui-ci peut être enlevé par des procédés de dégivrage classiques.

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