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AssigneeNordex Energy GmbH
InventorsUlrich Harms, Wolfgang Kabatzke, Mark Jurkat
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The invention relates to a method for operating a wind energy plant, the wind energy plant having a rotor with at least one rotor blade which has an adjustable pitch angle, the wind energy plant having a generator coupled to the rotor, and a regulation means which, if a there is a deviation of the rotation speed of the generator or rotor from a rotation speed set point, adjusts the pitch angle of the at least one rotor blade such that the rotation speed set point is reached again, wherein an electrical quantity provided by the wind energy plant by means of a generator and fed into a grid is reduced to a predetermined value in a short time by a reduction of a preset value for the generator, wherein prior to the regulation means noticing a deviation of the rotation speed of the rotor or generator from the rotation speed set point effected by the reduction of the preset value, an adjustment of the at least one rotor blade to a new pitch angle is initiated, wherein at the new pitch angle the rotation speed of the rotor or the generator reaches the rotation speed set point at the reduced electrical quantity and the current wind speed. In addition, the invention relates to a wind energy plant.
Method for operating a wind energy plant, the wind energy plant having a rotor with at least one rotor blade which has an adjustable pitch angle, the wind energy plant having a generator coupled to the rotor, and a regulation means which, if there is a deviation of the rotation speed of the generator or rotor from a rotation speed set point, adjusts the pitch angle of the at least one rotor blade such that the rotation speed set point is reached again, wherein an electrical quantity provided by the wind energy plant by means of a generator and fed into a grid is reduced to a predetermined value in a short time by reduction of a preset value for the generator, characterized in that prior to the regulation means (12) noticing a deviation of the rotation speed of the rotor or generator (nGI) from the rotation speed set point (nGS) effected by the reduction of the preset value, an adjustment of the at least one rotor blade to a new pitch angle (υ) is initiated, wherein at the new pitch angle (υ) the rotation speed of the rotor or generator (nGI) reaches the rotation speed set point at the reduced electrical quantity (P1, P2, P3, P4, P5) and the current wind speed (VWind).
Wind energy plant having a rotor with at least one rotor blade which has an adjustable pitch angle, the wind energy plant having a generator coupled to the rotor, a regulation means designed to adjust the pitch angle of the at least one rotor blade such that, if there is a deviation of the rotation speed of the generator or rotor from a rotation speed set point, the rotation speed set point is reached again, and a control means designed to reduce an electrical quantity which is provided by the wind energy plant by means of a generator and fed into a grid to a predetermined value in a short time by reduction of a preset value for the generator, characterized in that the control means (22) is designed to initiate an adjustment of the at least one rotor blade to a new pitch angle (υ) prior to the regulation means (12) noticing a deviation of the rotation speed of the rotor or generator (nGI) from the rotation speed set point (nGS) effected by the reduction of the preset value, wherein at the new pitch angle (υ) the rotation speed of the rotor or generator (nGI) reaches the rotation speed set point (nGS) at the reduced electrical quantity (P1, P2, P3, P4, P5) and the current wind speed (VWind).
Dependencies are inferred from the claim text.