Blade edge breakage monitoring device of aerogenerator

A wind turbine and monitoring device technology, which is applied to wind turbine components, wind engine monitoring, wind engines, etc., can solve the problems of unreliable reliability, time-consuming and laborious operation, and low efficiency, and achieve good real-time performance and reduce Small loss of power generation and high reliability

Inactive Publication Date: 2009-08-05
BEIJING NEGO AUTOMATION TECH
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  • Claims
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AI Technical Summary

Problems solved by technology

At present, most wind farms rely on manual inspections to regularly monitor damage. However, with the continuous increase in the power of wind turbines, the length of the blades is also increasing. The blade length of mainstream megawatt-level wind turbines has already exceeded 20 meters. At the same time, the scale of the electric field has also been further expanded. Reliable and timely monitoring of all wind turbine blades in the wind farm relies on traditional manual inspections. The advanced online monitoring system can reliably and accurately monitor blade edge damage in real time

Method used

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  • Blade edge breakage monitoring device of aerogenerator
  • Blade edge breakage monitoring device of aerogenerator
  • Blade edge breakage monitoring device of aerogenerator

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Embodiment Construction

[0017] Such as figure 1 and figure 2 As shown, three optical fibers are implanted inside the fan blade according to the pre-calculated and designed blade edge loss contour trend. Each level of optical fiber enters from its own inlet port A, and the outlet port B is led out to form a conduction loop.

[0018] Such as figure 2 As shown, the interval of different loss levels at the edge of the blade is the blade damage contour line, that is, the apex of the blade edge loss depression corresponding to the same failure risk level after the failure risk level is determined through stress analysis and load calculation.

[0019] Among them, the contour line 1 is based on the loss point ①②③④ calculated by stress analysis when the edge of the blade is lost. In the case of a wind speed of 80 m / s, the blade may have a hidden danger of breaking, and all the loss points that meet this condition are smoothly connected. The drawn contour trend lines, contour line 2 and contour line 3 are ...

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Abstract

The invention provides a wind power generator blade edge breakage monitoring device. Conductive medium is filled in wind power generator blades or adhered to the surfaces of the same according to different blade edge breakage grade spacing; the conductive medium forms a conductive loop between an entrance end A and an exit end B; and the conductive medium is connected with an on-off detector. According to the on and the off states of the conductive medium of different blade edge breakage grade lines, the potential fault grading alarm is realized. Compared with the prior device for artificially monitoring the wind power generator blade edge breakage, the wind power generator blade edge breakage monitoring device has high reliability and relatively lower monitoring cost, is simple and practical, can ensure that a wind power station proprietor can accurately know the breakage of all the edges of a wind power generator in time due to the installation of a blade monitoring system, provides a reliable basis for designing a truthful strong wind and typhoon resistance scheme and reduces the generated power energy loss resulted from wind power generator blade edge breakage.

Description

technical field [0001] The invention relates to a monitoring device for edge damage of wind turbine blades, in particular to a monitoring device for edge damage of large wind power generator blades. Background technique [0002] Wind turbines usually work in harsh environments, such as high and low temperatures, typhoons, lightning strikes, sandstorms, and various corrosions. At present, the service life of most large-scale wind turbines is generally about 20 years, and it is inevitable that the edges of the blades will be gradually damaged due to the harsh natural climate and natural wear and tear throughout the year. When the blade edge of the wind turbine is gradually damaged, it will affect the overall load distribution of the blade. When the edge damage is serious, it will not only affect the power generation to a certain extent, but also cause safety hazards, so it is necessary to work Personnel keep abreast of the relevant situation in a timely manner. At present, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88G01N27/20F03D11/00F03D17/00
CPCY02E10/722
Inventor 贾利民雷涛刘远远刘展王子洋秦勇
Owner BEIJING NEGO AUTOMATION TECH
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