Procedure for operating a wind power plant and corresponding wind power plant

摘要

Procedure for operating a wind power plant (10) with a rotor (12) and a generator (18) connected to the rotor (12) to emit electrical power to an electrical network, in which the rotor (12) has rotor blades (14) whose blade angles (α) to regulate the number of revolutions (n) of the rotor (12) during operation can be displaced and the rotor (12) is forcedly braked in case of a number of revolutions (n ) above a limit of the number of revolutions (nlím) that limits an operating range (34, 34 ', 34 ") of the wind power plant (10) through an increase in the blade angles (α) with a predetermined positive displacement index of the blade angle (ωr), in particular, with a displacement index of the blade angle of maximum possible positive value (ωr, max), the limit of the number of revolutions (nlim) being modified as a function of an index of displacement of the angle of blades adjusted through the re gulation (ω), characterized in that the modification of the limit of the number of revolutions (nlím) in function of the displacement index of the angle of blades adjusted through the regulation (ω) is a temporary modification within a predetermined period of time of regulation (Δt).