Determining method and device of fatigue damage of tower part of wind generating set

A technology for wind turbines and determination methods, which is applied in the monitoring of wind turbines, configuration of wind turbines, installation/support of wind turbines, etc., and can solve problems such as unpredictable life expectancy, difficulty in long-term monitoring, and limited accuracy

Active Publication Date: 2017-11-24
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Such methods have limited accuracy, especially in the early stages, and may not be able to predict lifespan due to lack of historical data
[0005] Using strain gauges to measure tower strain and load is limited by the life and reliability of strain gauges, making it difficult to monitor for a long time
The service life of strain gauges is generally 3 to 5 years, and its measurement accuracy is related to the installation process of strain gauges, environmental temperature changes, calibration, etc. Practice has shown that the test results based on strain gauges have poor stability and reliability

Method used

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  • Determining method and device of fatigue damage of tower part of wind generating set
  • Determining method and device of fatigue damage of tower part of wind generating set
  • Determining method and device of fatigue damage of tower part of wind generating set

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Experimental program
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Embodiment Construction

[0047] Various example embodiments will now be described more fully with reference to the accompanying drawings, in which some example embodiments are shown.

[0048] figure 1 A flowchart showing a method for determining fatigue damage of a tower of a wind power generating set according to an exemplary embodiment of the present invention.

[0049] refer to figure 1 , in step S10, the absolute displacement of the tower top at multiple different time points within a predetermined time period is obtained. Here, the absolute displacement of the tower top refers to the displacement of the tower top relative to the tower bottom.

[0050] Here, various existing methods can be used to obtain the absolute displacement of the tower top. In one example, the displacement of the top of the tower relative to the bottom of the tower may be measured in real time (ie, measured at any one of the plurality of different time points) based on a satellite positioning system (such as the BeiDou s...

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Abstract

The invention provides a determining method and device of the fatigue damage of a tower part of a wind generating set. The method includes the steps of obtaining the tower top absolute displacement, wherein the tower top absolute displacement refers to the displacement of the top of a tower relative to the bottom of the tower; obtaining the tower upper part relative displacement, wherein the tower upper part relative displacement refers to the displacement of a preset position on the tower relative to the axis; obtaining a tower load according to the obtained tower top absolute displacement and the obtained tower upper part relative displacement; determining the fatigue damage value of a preset part on the tower within a preset time duration according to the obtained tower load. By means of the method and device, the fatigue damage value of the preset part on the tower is determined through the tower top absolute displacement and the tower upper part relative displacement collected in real time without depending on historical running data of the wind generating set, and the estimation reliability and accuracy of the residual life of the whole tower of the wind generating set are improved.

Description

technical field [0001] The present invention generally relates to the technical field of wind power generation, and more specifically, relates to a method and equipment for determining fatigue damage of tower components of a wind power generating set. Background technique [0002] Wind turbines operate in an extremely unstable atmospheric environment and are subjected to random alternating loads. The safe and stable operation of wind turbines has always been a key research topic in the industry. With the continuous increase of wind power installed capacity, more and more researches on condition monitoring, health diagnosis and life assessment of wind turbines have become a hot research direction. [0003] For wind turbine towers, the tower vibration acceleration signals are usually collected for a long time, and a life prediction model is built based on statistical methods to complete the state monitoring and life prediction of the tower. In addition, strain gauges can also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D13/20F03D17/00
CPCF03D13/20F03D17/00Y02E10/72Y02E10/728
Inventor 彭超张志弘刘朝丰
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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