Method for monitoring blade deformation

A blade and deformation technology, used in wind turbine monitoring, wind turbine control, wind power generation, etc., can solve problems such as low accuracy, inability to accurately find and locate fan faults, and achieve the effect of avoiding breakage and falling

Inactive Publication Date: 2018-11-30
YUANJIAN WIND POWER JIANGYINENVISION ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, monitoring methods using acoustic emission or laser radar are disclosed, but these monitoring methods simply analyze the monitored deformation data, resulting in low accuracy, and cannot accurately find and locate the fault caused by the deformation of the fan

Method used

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  • Method for monitoring blade deformation
  • Method for monitoring blade deformation
  • Method for monitoring blade deformation

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Embodiment Construction

[0037] It should be noted that components in the various figures may be shown exaggerated for the purpose of illustration and are not necessarily true to scale. In the various figures, identical or functionally identical components are assigned the same reference symbols.

[0038] In the present invention, unless otherwise specified, "arranged on", "arranged on" and "arranged on" do not exclude the presence of intermediates between the two.

[0039] In the present invention, each embodiment is only intended to illustrate the solutions of the present invention, and should not be construed as limiting.

[0040] In the present invention, unless otherwise specified, the quantifiers "a" and "an" do not exclude the scene of multiple elements.

[0041] It should also be pointed out here that in the embodiments of the present invention, for the sake of clarity and simplicity, only a part of parts or components may be shown, but those skilled in the art can understand that under the t...

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PUM

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Abstract

The invention relates to a method for monitoring blade deformation. The method for monitoring the blade deformation includes the steps of determining the initial deformation of the blade of a wind turbine when the wind speed is below a wind speed threshold and the blade is in a vertical position, measuring the first deformation amount of the blade when the wind speed is lower than the threshold and the the blade is in a horizontal position to determine a static flapping deformation response, changing the blade angle by 90 degrees when the wind speed is lower than the threshold and then measuring the second deformation amount of the blade to determine a static array deformation response, receiving blade deformation data from a blade deformation monitoring device during operation of the windturbine, and determining blade deformation based on the static flapping deformation response, static array deformation response and blade deformation data. Further disclosed is the wind turbine. Themethod for monitoring the blade deformation and the wind turbine have the advantages of accurately determining blade deformation and thus promptly identifying possible blade damage, reconstructing blade spanwise wind speed distribution based on the real-time deformation data of the blade, and accurately defining wind speed changes at different locations.

Description

technical field [0001] The present invention generally relates to the field of clean energy, in particular to a method for monitoring the deformation of a blade. Furthermore, the invention relates to a wind generator capable of monitoring the deformation of the blades. Background technique [0002] The blades of wind turbines are key components for receiving wind energy, and their reliability directly affects the safe operation of wind turbines. For example, the blades of megawatt-class wind turbines can exceed 50m in length, and the longest can reach 80m, and damage to larger blades will lead to higher maintenance costs. At the same time, the load bearing of the blade is relatively complicated, mainly bearing aerodynamic force, inertial force and centrifugal force. The factors that affect the stress on the blade include not only meteorological and geographical environmental factors such as wind speed, wind direction, laminar flow distribution, blade icing, and terrain, bu...

Claims

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Application Information

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IPC IPC(8): F03D17/00F03D7/04
CPCF03D7/042F03D17/00Y02E10/72
Inventor 梁家宁郭晓明朱小芹陈潇吉凡朱秋娴朱延斌
Owner YUANJIAN WIND POWER JIANGYINENVISION ENERGY CO LTD
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