Lm Glasfiber A/s

Bernt Ebbe Pedersen

Peter Grabau

Ib Frydendal

Jørgen Dahl Vestergaard

Wind turbine blade () including adjustable lift-regulating means () arranged on or at the surface of the wind turbine blade (), said lift-regulating means being provided with activating means by means of which they can be adjusted and thus alter the aerodynamic properties of the blade (). The lift-regulating means () and the activating means are adapted and arranged such that by activation of the activating means, the lift can be reduced in a zone extending in the longitudinal direction of the blade () from a first position adjacent the blade tip () to a second position between the position and the blade root () and this second position is variable in the longitudinal direction of the blade () by adjusting activate means. The lift-regulating means are formed of at least one flexible flap (). The invention further relates to a wind turbine rotor including such wind turbine blades, to a wind turbine and to a method of controlling the wind turbine.

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Kolding, Denmark

Bernt Ebbe Pedersen