Method of controlling a wind turbine

A wind power generation device and wind power technology, which are applied in the control of wind turbines, wind energy power generation, wind turbines, etc., can solve the problems of increasing wind speed standard deviation, wind speed fluctuation, and increasing turbulence intensity.

Inactive Publication Date: 2009-08-19
NORDEX ENERGY
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  • Abstract
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Problems solved by technology

Due to the inhomogeneous nature of the ground around said location, large fluctuations in wind speed will occur, which will lead to an increase in the standard deviation σ of the wind speed
Therefore, the turbulence intensity is increased by this

Method used

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  • Method of controlling a wind turbine
  • Method of controlling a wind turbine
  • Method of controlling a wind turbine

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Embodiment Construction

[0022] figure 1 It shows the turbulence intensity of the line 10 measured at a position of the wind power generator depending on the wind direction. In the selected representation, the distance of the point on the line 10 from the center represents the intensity of the turbulence that exists in the wind direction. in figure 1 Circle 12 is also drawn in it, which presets the maximum turbulence intensity. The maximum turbulence intensity does not depend on the wind direction, resulting in a circle, and therefore the same distance from the center of the representation in each direction. In the area 14 indicated as shaded, the turbulence intensity 10 existing at that location is greater than the maximum value 12 of the turbulence intensity. The intersection of the turbulence intensity 10 and the maximum value of the turbulence intensity defines two wind directions 16, 18, which define the critical wind direction sector 20. Generally speaking, the sector of critical wind direction i...

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Abstract

A method for the operation of a wind energy plant, with an operation management, which can preset a desired value for an electric variable of the wind energy plant to be generated; a wind measurement device, which can capture the wind direction and the wind velocity, and a control unit, on which the measured values for the wind velocity and the wind direction are present, and in which a maximum value for the turbulence intensity is filed, the following procedural steps proceed in the method: from a turbulence intensity depending on the wind direction, the control unit determines one or more sectors of critical wind directions, in which the turbulence intensity exceeds the maximum value for the turbulence intensity, the control unit generates a control signal for the operation management, in order to reduce the desired value of the electric variable to be generated when the measured wind direction is in a sector of the critical wind directions, and a determined characteristic value exceeds a predetermined maximum value for the characteristic value.

Description

Technical field [0001] The present invention relates to a method for operating a wind power plant using operation management, which presets expected values ​​of electrical variables to be generated in the wind power plant. Background technique [0002] From "Erneuerbare Energien 5 / 2006", pages 39 to 43, it is known that the intensity of turbulence depends on the location and time of measurement. Based on the average value of the wind speed, the turbulence intensity is defined as the standard deviation σ of the wind speed. As a measure for fluctuations in wind speed, the intensity of turbulence is determined by the terrain around the location and the like. The higher the surface roughness around the location, the higher the turbulence intensity. Due to the uneven characteristics of the ground around the location, large fluctuations in wind speed will occur, which will cause the standard deviation σ of the wind speed to increase. Therefore, the intensity of turbulence is thereby in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02
CPCF05B2270/107Y02E10/723F05B2270/1011F03D7/042F03D7/0292F05B2270/321F05B2270/1016F05B2270/32F05B2270/20F05B2270/1033F03D7/0224F05B2270/328F05B2270/109Y02E10/72
Inventor G·施密特
Owner NORDEX ENERGY
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