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Fiber grating type intelligent diagnosis method and system for variable-pitch flange and blade of wind turbine generator

A fiber grating and wind turbine technology, applied in wind turbines, monitoring of wind turbines, engines, etc., can solve problems such as the inability to identify pitch flanges and unclear fault diagnosis mechanisms, and achieve improved engineering application value, reliable functions, and diagnostics Mechanistically clear effect

Active Publication Date: 2022-01-11
LONGYUAN BEIJING WIND POWER ENG TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an intelligent diagnosis method and system for pitch flanges and blades of fiber grating wind turbines, which can solve the fault diagnosis mechanism of the pitch flange and blade fault diagnosis system based on fiber grating sensing technology. Problems such as pitch flange and blade failure cannot be identified due to unknown

Method used

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  • Fiber grating type intelligent diagnosis method and system for variable-pitch flange and blade of wind turbine generator
  • Fiber grating type intelligent diagnosis method and system for variable-pitch flange and blade of wind turbine generator
  • Fiber grating type intelligent diagnosis method and system for variable-pitch flange and blade of wind turbine generator

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Embodiment 1

[0030] Embodiment 1 An Intelligent Diagnosis Method for Pitch Flange Bolts and Blades of Wind Turbine Units

[0031] Such as Figure 1-4 As shown, a fiber grating type wind turbine pitch flange, blade intelligent diagnosis method, including blade fault diagnosis algorithm and its figure 1 The algorithm for extracting the aerodynamic unbalance index of the blade shown, figure 2 The blade mass imbalance index extraction algorithm shown and image 3 The blade damage identification algorithm shown can identify blade aerodynamic unbalance, mass unbalance, blade damage and other faults in real time; it includes such as Figure 4 The state monitoring algorithm of the pitch flange bolts and its secondary over-limit threshold are shown, and the faults such as bolt looseness and fracture can be judged in real time.

[0032] Such as figure 1 The wind turbine blade aerodynamic unbalance index extraction algorithm calculates the fiber grating strain sensing data in the 90° and 270° di...

Embodiment 2

[0085] Embodiment 2 An Intelligent Diagnosis System for Pitch Flanges and Blades of Wind Turbines

[0086] This embodiment provides an intelligent diagnosis system for wind turbine pitch flanges and blades according to Embodiment 1, such as image 3 As shown, the system includes the following modules:

[0087] Blade fault diagnosis module: According to the blade fault diagnosis algorithm and its subordinate blade aerodynamic imbalance index extraction algorithm, blade mass imbalance index extraction algorithm, and blade damage identification algorithm, a blade fault diagnosis module is constructed, which receives blade fiber grating strain monitoring in real time Data, analyze and diagnose the current fault status of the blades of the unit, and complete the judgment of blade faults.

[0088] Pitch flange bolt state monitoring module: According to the pitch flange bolt filling monitoring algorithm and its secondary threshold value, the pitch flange bolt state monitoring module...

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Abstract

The invention provides a fiber grating type intelligent diagnosis method and system for a variable-pitch flange and a blade of a wind turbine generator. The method comprises the following steps: acquiring stress monitoring data of the blade and displacement monitoring data of the variable-pitch flange; performing fault diagnosis on the blade according to the obtained stress monitoring data; and performing bolt filling monitoring on the displacement monitoring data, and judging whether a current variable-pitch flange bolt is loosened or fractured or not. According to the fiber grating type intelligent diagnosis method and system for the variable-pitch flange and the blade of the wind turbine generator, the problem that faults of the variable-pitch flange and the blade cannot be identified due to the fact that a fault diagnosis mechanism of a variable-pitch flange and blade fault diagnosis system based on a fiber grating sensing technology is unknown can be solved.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to an intelligent diagnosis method and system for pitch flanges and blades of a fiber grating type wind turbine. Background technique [0002] With the proposal of the national "double carbon" goal, various power generation companies have higher and higher requirements for the stability of new energy power supply, especially in the field of wind power generation. However, as an important device that converts wind energy into electrical energy, wind turbines have operation stability and safety as the key to ensure stable power supply. Among them, the pitch flange bolts of wind turbines are an important connecting part of the blades of the wind turbine, and abnormalities such as looseness will inevitably occur, and the blades will also be unbalanced and damaged due to harsh weather conditions such as sandstorms, rain, typhoons, and salt erosion. Faults, such faults can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D17/00
CPCF03D17/00Y02E10/72
Inventor 李仁堂李华新夏晖冯江哲胡鹏肖剑刘欢
Owner LONGYUAN BEIJING WIND POWER ENG TECH
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