Method and device for identifying pitch angle consistency deviation based on blade load

An identification method and pitch angle technology, which is applied in the monitoring of wind turbines, wind power generation, wind turbines, etc., can solve the problems of three-blade pitch angle deviation, difficulty in effectively identifying wind turbines, etc.

Active Publication Date: 2021-10-29
CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a method and device for identifying pitch angle consistency deviation based on blade loads to solve the technical problem that it is difficult to effectively identify the pitch angle deviation of three blades of wind turbines by existing technical means

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  • Method and device for identifying pitch angle consistency deviation based on blade load
  • Method and device for identifying pitch angle consistency deviation based on blade load
  • Method and device for identifying pitch angle consistency deviation based on blade load

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Embodiment 1

[0039] see figure 1 , the present invention provides a method for identifying deviations of pitch angle consistency based on blade loads, comprising the following steps:

[0040] S1. Measure the strain values ​​of the three blades of the wind turbine based on the strain sensor respectively;

[0041] S2. Calculating the blade root shimmy bending moment and the blade root flapping moment of the blade according to the strain values ​​of each blade respectively;

[0042] S3. Calculate the combined bending moment of the blade based on the shimmy bending moment at the blade root and the swinging bending moment at the blade root;

[0043] S4. Filtering the resulting blade bending moment to obtain an approximate value of the DC component of the blade resulting bending moment;

[0044] S5. Calculating the maximum value of the difference between the approximate values ​​of the direct current component of the combined bending moment of the blades of the three blades;

[0045] S6. Base...

Embodiment 2

[0062] The present invention also provides a pitch angle consistency deviation identification device based on blade load, comprising:

[0063] The measurement module is used to respectively measure the strain values ​​of the three blades of the wind turbine based on the strain sensor, and transmit the strain values ​​of each blade to the processing module;

[0064] The processing module is configured to receive the strain values ​​of the blades returned by the measurement module, and calculate the blade root shimmy bending moment and the blade root flapping moment of the blade according to the strain values ​​of each blade respectively, and based on the The shimmy bending moment of the blade root of the blade and the flailing bending moment of the blade root are used to calculate the combined bending moment of the blade; it is also used to filter the combined bending moment of the blade to obtain the approximate value of the DC component of the combined bending moment of the bl...

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Abstract

The invention provides a method and device for identifying a pitch angle consistency deviation based on blade load. The method comprises the following steps: separately measuring strain values of three blades of a wind turbine generator based on a strain sensor; calculating blade root shimmy bending moment and blade root waving bending moment of each blade according to the strain value of each blade; calculating resultant bending moment of the blade based on the blade root shimmy bending moment and the blade root waving bending moment of each blade; carrying out filtering processing on the resultant bending moment of each blade to obtain a direct current component approximate value of the resultant bending moment of each blade; and calculating the maximum difference value between the direct-current component approximate values of the resultant bending moment of the three blades, and if the maximum difference value is continuously greater than a set threshold value within preset time, judging that the pitch angle consistency deviation exists among the three blades. By applying sensing equipment and monitoring the blade root load, the consistency difference of the pitch angles between the blades of the wind turbine generator is effectively and automatically identified, the situation that the generator runs in an off-design condition for a long time is avoided, and the load safety and the power generation efficiency of the generator are guaranteed.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method and device for identifying pitch angle consistency deviations based on blade loads. Background technique [0002] With the installation of a large number of long-blade and large-capacity three-blade megawatt-class wind turbines, the diameter of the rotor and the length of the blades of the wind turbines are increasing. , the operation safety and energy loss of wind turbines are becoming more and more serious. Especially with the improvement of wind turbine installation efficiency, how to effectively identify the pitch angle deviation of the three blades of the wind turbine and avoid the safety risks and economic losses caused by the inconsistent pitch angle of the three blades of the wind turbine has become a real demand for the batch application of wind turbines. [0003] At present, the confirmation of the pitch angle of wind turbine blade installation i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D17/00F03D80/00
CPCF03D17/00F03D80/00Y02E10/72
Inventor 张帆代思维邓雨文华王清飞汪航何其锋陆伟
Owner CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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