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Off-line detection method and online verticality monitoring method of wind turbine tower verticality

A wind turbine, off-line detection technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of high cost, safety accidents, and the inability to know the verticality information of the tower tube in real time, and achieve the effect of convenient installation and debugging and low cost

Active Publication Date: 2018-12-04
上海应谱科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive tilt deformation of the tower will affect the normal operation of the wind turbine, and even cause safety accidents in serious cases. Therefore, real-time detection of the verticality of the wind turbine and the safety of the tower is required
[0003] At present, the verticality of the wind turbine tower is measured regularly using an optical level, which is time-consuming and laborious, and the verticality information of the tower cannot be known in real time.
For tower shape measurement, multiple GPS receivers are usually installed on the tower, and the tilt shape of the tower is drawn according to the GPS measurement data. This method is costly, and the tower is in a closed state, making it difficult to receive GPS signals.

Method used

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  • Off-line detection method and online verticality monitoring method of wind turbine tower verticality
  • Off-line detection method and online verticality monitoring method of wind turbine tower verticality
  • Off-line detection method and online verticality monitoring method of wind turbine tower verticality

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] According to the above steps, the four sets of data obtained are (0°, -2.92°), (90°, 0.5°), (180°, 2.92°), (270°, -0.5°), and the maximum The optimal solution of the angle of inclination Angle and the combined tower top inclination direction Dir relative to true north is: Angle=2.96°, Dir=350°, and after converting Angle=2.96° into radians, the absolute vertical angle of the tower top is obtained. The inclination angle θ' of the line, the inclination angle of the tower sway range is θ=arcsin(2×θ'÷3)=1.97366, the sway at the top of the tower S=H×tanθ, assuming that the tower height H is 100m, Then the slosh at the top of the tower is S=H×tanθ=3.446m.

Embodiment 2

[0042] According to the above steps, the four sets of data obtained are (50°, -1.48°), (140°, 2.72°), (230°, 1.48°), (320°, -2.72°), and the maximum The optimal solution of the angle of inclination Angle and the combined orientation of the top of the tower relative to the north is: Angle=3.1°, Dir=348°. After converting Angle=3.1° into radians, the top of the tower is relative to the absolute vertical The inclination angle θ' of the line, the inclination angle of the tower sway range is θ=arcsin(2×θ'÷3)=2.0607, the sway at the top of the tower S=H×tanθ, assuming that the tower height H is 100m, Then the slosh at the top of the tower is S=H×tanθ=3.598m.

Embodiment 3

[0044] According to the above steps, the four sets of data obtained are (100°, 1.14°), (190°, 3.22°), (280°, -1.14°), (10°, -3.22°), and the maximum The optimal solution of the angle of inclination Angle and the resulting inclination of the top of the tower relative to the true north is: Angle=3.42°, Dir=350°. After converting Angle=3.42° into radians, the top of the tower is relative to the absolute vertical The inclination angle θ' of the line, then the inclination angle of the tower sway range is θ=arcsin(2×θ'÷3)=2.2804, the sway at the top of the tower S=H×tanθ, assuming that the tower height H is 100m, Then the slosh at the top of the tower is S=H×tanθ=3.982m.

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Abstract

The invention discloses an off-line perpendicularity detection method for a wind turbine unit tower. The method comprises following steps: 1), clockwise numbering bolts which are circumferentially and uniformly distributed on a top flange surface of the tower; 2), measuring an included angle a1 formed by a connecting line of a first bolt and a tower door center and a connecting line of the due north direction and a tower center; 3), measuring an included angle a2 formed by a connecting line of the tower center and the tower door center and the connecting line of the due north direction and the tower center; 4), calculating an included angle a formed by a connecting line of the first bolt and the tower center and the connecting line of the due north direction and the tower center; 5), measuring flange surfaces of the positions where the bolts are located by a beam type tilting sensor; 6), measuring flange surfaces of the positions where at least two different bolts are located with a method in the step 5); 7), calculating the synthesized maximum tilting angle Angle of the top of the tower and a synthesized tilting azimuth Dir of the top of the tower relative to the due north. The invention further discloses an on-line perpendicularity monitoring method.

Description

technical field [0001] The invention relates to an off-line detection method and an online verticality monitoring method of a wind turbine tower cylinder. Background technique [0002] The tower of the wind turbine is the load-bearing part of the wind turbine. It mainly plays a supporting role in the wind turbine and absorbs the vibration of the turbine. The tower is subjected to complex and variable loads such as thrust, bending moment, and torque load, which makes the tower shake and twist to a certain extent during the operation of the wind turbine; in addition, the tower will also be subject to material changes, zero Influenced by factors such as component failure and foundation settlement, tilting occurs and a certain deflection occurs. Excessive tilt deformation of the tower will affect the normal operation of the wind turbine, and even cause safety accidents in severe cases. Therefore, real-time detection of the verticality of the wind turbine and the safety of the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/22
CPCG01B21/22
Inventor 陈洪德张洪武
Owner 上海应谱科技有限公司
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