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Control of power, loads and/or stability of a horizontal axis wind turbine by use of variable blade geometry control

A technology of wind turbines and wind turbine blades, applied in the field of design concepts, can solve problems such as increased aerodynamic noise, achieve the effects of reducing aerodynamic noise, improving aerodynamic efficiency, and suppressing vibration

Inactive Publication Date: 2006-05-31
DANMARKS TEKNISKE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one disadvantage of the Gurney flap is that there is increased aerodynamic noise from the free end of the Gurney flap and from the gap inside the blade where the Gurney flap is located

Method used

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  • Control of power, loads and/or stability of a horizontal axis wind turbine by use of variable blade geometry control
  • Control of power, loads and/or stability of a horizontal axis wind turbine by use of variable blade geometry control
  • Control of power, loads and/or stability of a horizontal axis wind turbine by use of variable blade geometry control

Examples

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Embodiment Construction

[0053] exist Figure 4 Inside, an airfoil part 1 is schematically shown with two deformable parts, ie a deformable leading edge and a trailing edge region. The initial shape of the airfoil portion 1 is indicated by the solid line, wherein the leading edge region 10 and the trailing edge region 12 are not deformed, and the deformed shape of the airfoil portion is indicated by the dashed line, wherein the leading edge region and the trailing edge region are deformed by Figure 4 The leading edge region and the trailing edge region are indicated by reference numerals 10a and 12a inside. Furthermore, the airfoil portion 1 comprises a non-deformable portion 14 designed to support the loads generated by the airfoil portion. Such as Figure 4 As shown, the deformation of the airfoil part 1 does not introduce any discontinuity to the outer surface of the airfoil part 1 , which remains smooth during and after deformation.

[0054] The wing may have a deformable portion extending acr...

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Abstract

The present invention relates to a design concept according to which, by using active geometry control (for example, smart materials or embedded mechanical actuators), or using passive geometry control (for example caused by the loading and / or deformation of the blade) changes), or a combination of these two methods, allows rapid changes in the blade geometry to control the power, load and / or stability of the wind turbine. In particular the invention relates to a wind turbine blade, a wind turbine and a method of controlling a wind turbine.

Description

technical field [0001] Preferred embodiments of the present invention relate to a design concept according to which, by using active geometry control (e.g. smart materials or embedded mechanical actuators), or using passive geometry control (e.g. by blade loads and and / or deformation-induced changes), or a combination of these two methods, enables rapid changes in blade geometry to control wind turbine power, loads, and / or stability. In particular the invention relates to a wind turbine blade, a wind turbine and a method of controlling a wind turbine. Background technique [0002] Almost all large wind turbines manufactured today are equipped with tilt bearings at the blade root, so that the pitch angle (pitch) of the entire blade can be easily changed by activating the tilt mechanism. The change in blade pitch acts as a brake to stop the rotor and can also be used to control power and load differently. On current stall-controlled wind turbines, the pitch of the blades can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06F03D7/04
CPCF03D1/0641F03D7/0232F05B2240/31F05B2240/311F05B2260/70F05B2260/76F05B2280/5006Y02E10/72F05B2240/3052
Inventor D·C·巴克T·布尔P·富格尔桑H·A·马德森F·拉斯穆森
Owner DANMARKS TEKNISKE UNIV
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