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Prediction method for corrosion residual life of transmission line towers at industrial area

A life prediction and transmission line technology, applied in the field of electric power engineering, to achieve the effect of ensuring safety, high accuracy, and preventing disconnection

Active Publication Date: 2016-01-20
STATE GRID CORP OF CHINA +2
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  • Summary
  • 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 a method that can quickly and accurately predict the remaining corrosion life of transmission line towers in industrial areas, so as to take maintenance measures in time, in view of the lack of quantitative corrosion remaining life evaluation means for current transmission line towers. To prevent accidents such as transmission line dropouts, power outages, trips and other accidents caused by this, a scientific and reasonable, fast and accurate prediction method for the remaining life of transmission line tower corrosion in industrial areas

Method used

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  • Prediction method for corrosion residual life of transmission line towers at industrial area
  • Prediction method for corrosion residual life of transmission line towers at industrial area
  • Prediction method for corrosion residual life of transmission line towers at industrial area

Examples

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Embodiment 1

[0034] Such as figure 1 As shown, the steps of the method for predicting the remaining life of corrosion of transmission line towers in industrial areas in this embodiment include:

[0035] 1) Measure the average thickness d of the remaining galvanized layer of the tower material to be predicted Zn ; In this embodiment, the surface of the tower has been covered with red rust, so the average thickness d of the remaining galvanized layer of the tower is predicted Zn = 0;

[0036] 2) Measure the minimum remaining thickness t of the severely corroded area of ​​the tower material of the predicted tower, and subtract the minimum remaining thickness t from the original thickness h of the tower material of the predicted tower to obtain the maximum corrosion depth d of the tower material of the predicted tower; in this embodiment , the original thickness h of the tower material is predicted to be 10mm, and the minimum remaining thickness t is 9mm, so the maximum corrosion depth d of ...

Embodiment 2

[0057] This embodiment is basically the same as Embodiment 1, and the main difference is that the implementation of step 3) is different.

[0058] In this embodiment, the detailed steps of step 3) include: first obtain the classification of the corrosion environment of the industrial area where the predicted tower is located, and then query the preset corrosion environment maximum corrosion rate comparison table (see Table 1) according to the classification of the corrosion environment to obtain The iron corrosion rate v of the industrial area where the predicted tower is located Fe and zinc corrosion rate v Zn .

[0059] Table 1: Comparison table of maximum corrosion rate in corrosive environment.

[0060]

[0061] The corrosion environment classification of the industrial area where the predicted tower is located can be obtained from the environmental monitoring center or atmospheric corrosion site where the predicted tower target is located. According to the provision...

Embodiment 3

[0064] This embodiment is basically the same as Embodiment 1, and the main difference is that the implementation of step 3) is different.

[0065] In this embodiment, the detailed steps of step 3) include: first directly calculate the iron corrosion rate v of the industrial area where the tower is located according to formula (3) Fe , and then according to the predicted iron corrosion rate v of the industrial area where the tower is located Fe Find the maximum corrosion rate comparison table of the preset corrosive environment (see Table 1), and obtain the zinc corrosion rate v of the industrial area where the predicted tower is located Zn ;

[0066] v Fe =1000(h-t)÷T(3)

[0067] In formula (3), v Fe is the iron corrosion rate in the industrial area where the predicted tower is located, h is the original thickness of the tower material of the predicted tower, t is the minimum remaining thickness of the severely corroded area of ​​the tower material of the predicted tower, ...

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Abstract

The present invention discloses a prediction method for a corrosion residual life of transmission line towers at an industrial area. The prediction method provided by the invention comprises the following steps: 1) measuring an average thickness of a zinc coating of materials of a predicted tower; 2) measuring a minimum residual thickness of the serious material corrosion area of the predicted tower, and obtaining a maximum residual thickness of the materials of the predicted tower through an original thickness of the materials of the predicted tower subtracting the minimum residual thickness of the serious material corrosion area of the predicted tower; 3) determining an iron corrosion rate and a zinc corrosion rate of the industrial area at which the predicted tower is located; 4) obtaining a maximum corrosion allowance depth of the materials of the industrial area at which the predicted tower is located; and 5) calculating a corrosion residual safe life of the predicted tower. According to the invention, corrosion residual lives of transmission line towers at an industrial area may be quickly and accurately predicted, so that maintenance measures may be timely adopted and accidents such as lost connection, power failure and tripping operation of electric transmission lines may be prevented. The prediction method for a corrosion residual life of transmission line towers at an industrial area is scientific and reasonable, and has fast time and high accuracy.

Description

technical field [0001] The invention relates to the field of electric power engineering, in particular to a method for predicting the remaining corrosion life of power transmission line towers in industrial areas. Background technique [0002] In the power system, high-voltage overhead transmission lines are mainly composed of towers, wires and fittings. Among them, the pole tower is the structural supporter of the transmission line, which plays the role of fixing and supporting the wires and fittings, and preventing the transmission line from touching the ground. As the main load-bearing structure of transmission lines, towers are used in a huge amount. In Hunan Province alone, there are millions of towers, and each tower weighs several tons to dozens of tons. It is the most used type of component in transmission lines. With the rapid development of modern power grids, the construction of ultra-high voltage and smart grids, the amount of towers is still expanding. Since t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
Inventor 陈军君李明谢亿谢国胜胡波涛王军欧阳克俭刘纯
Owner STATE GRID CORP OF CHINA
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