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A Method for Predicting the Corrosion Remaining Life of Transmission Line Towers in Coastal Areas

A technology for transmission line and life prediction, which is applied in the field of electric power engineering to achieve the effect of clear physical meaning, strong practicability and high accuracy

Active Publication Date: 2018-07-13
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method that can quickly and accurately predict the remaining safe life of transmission line towers in coastal areas after being corroded in order to timely Take measures to control and prevent safety accidents such as transmission line dropouts, power outages, trips and other safety accidents caused by them. A highly accurate and practical method for predicting the remaining life of transmission line tower corrosion in coastal areas

Method used

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  • A Method for Predicting the Corrosion Remaining Life of Transmission Line Towers in Coastal Areas
  • A Method for Predicting the Corrosion Remaining Life of Transmission Line Towers in Coastal Areas
  • A Method for Predicting the Corrosion Remaining Life of Transmission Line Towers in Coastal Areas

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Embodiment 1

[0033] like figure 1As shown, the steps of the method for predicting the remaining corrosion life of transmission line towers in coastal areas in this embodiment include:

[0034] 1) Measure the average thickness d of the remaining galvanized layer of the tower material to be predicted Zn , unit μm;

[0035] 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 mm; In the embodiment, the original thickness h of the predicted tower material is 8 mm, the minimum remaining thickness t is 5 mm, and the maximum corrosion depth d of the tower material is 3 mm;

[0036] 3) Determine the iron corrosion rate v in the coastal area where the predicted tower is located Fe and zinc corrosion rate v Zn ;

[003...

Embodiment 2

[0056] This embodiment is basically the same as the first embodiment, and the main difference is that the implementation methods of step 3) and step 4.1) are different.

[0057] In this embodiment, the detailed steps of step 3) include: first obtain the classification of the corrosion environment in the coastal area where the predicted tower is located, and then query the preset maximum corrosion rate comparison table for the corrosion environment according to the classification of the corrosion environment (see Table 1 for details), Get the iron corrosion rate v of the coastal area where the predicted tower is located Fe and zinc corrosion rate v Zn .

[0058] Table 1: Comparison table of maximum corrosion rate in corrosive environment.

[0059]

[0060] The classification of the corrosive environment in the coastal area where the predicted tower is located can be obtained from the environmental monitoring center or atmospheric corrosion site where the predicted tower ta...

Embodiment 3

[0064] This embodiment is basically the same as the first embodiment, and the main difference is that the implementation methods of step 3) and step 4.1) are different.

[0065] In the present embodiment, the detailed steps of step 3) include: first directly calculate the iron corrosion rate v of the coastal area where the predicted tower is located according to formula (3) Fe , and then according to the predicted iron corrosion rate v in the coastal area where the tower is located Fe Look up the comparison table of the maximum corrosion rate of the preset corrosion environment (see Table 1 for details), and obtain the zinc corrosion rate v of the coastal 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 coastal 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 cor...

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Abstract

The invention discloses a corrosion residual life prediction method of transmission line towers in coastal regions. The method comprises the following steps: 1) measuring average thickness of tower material's residual zinc coating of a predicted tower; 2) measuring the minimal residual thickness of tower material's severely corroded regions of the predicted tower, and subtracting the minimal residual thickness from tower material's original thickness of the predicted tower so as to obtain the tower material's maximum corrosion depth of the predicted tower; 3) determining iron corrosion rate and zinc corrosion rate of the coastal region where the predicted tower resides; 4) obtaining the tower material's maximum allowable corrosion depth of the coastal region where the predicted tower resides; and 5) calculating corrosion residual safe life of the predicted tower. According to the invention, residual safe life of corroded transmission line towers in coastal regions can be predicted rapidly and accurately. Thus, measures can be taken timely so as to control and prevent accidents such as off-line, power failure, trip-out, etc. of transmission lines due to corrosion. The method of the invention has advantages of high accuracy and strong practicality.

Description

technical field [0001] The invention belongs to the field of electric power engineering, and in particular relates to a method for predicting the remaining corrosion life of power transmission line towers in coastal areas. Background technique [0002] Transmission lines are the backbone of modern power grids. At present, high-voltage transmission lines mainly adopt the type of overhead transmission lines, which are composed of towers, wires and fittings. The pole tower is the main load-bearing structure of the transmission line, which plays the role of fixing and supporting the overhead line. The safety of the tower directly affects the safety of the line. Failure of the tower will cause the line to fall directly to the ground, causing line trips, power outages, and even personal safety accidents. As towers are the most widely used materials in transmission lines, they are widely distributed, and the operating environment is harsh. They have been exposed to wind, sun, rain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00
CPCG01N17/006
Inventor 陈军君胡波涛欧阳克俭李明王军胡加瑞龙毅
Owner STATE GRID CORP OF CHINA
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