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Method for predicting corrosion life of transmission line hardware in industrial area

A transmission line and life prediction technology, applied in the field of electric power engineering, achieves the effects of high accuracy, safety assurance, and fast time

Active Publication Date: 2014-11-05
STATE GRID HUNAN ELECTRIC POWER +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 for predicting the corrosion life of power transmission line fittings in industrial areas, which can quickly and accurately predict the corrosion life of power fittings in industrial areas. Corrosion life, in order to take measures in time to prevent transmission network power outage tripping accidents caused by transmission line disconnection faults

Method used

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  • Method for predicting corrosion life of transmission line hardware in industrial area
  • Method for predicting corrosion life of transmission line hardware in industrial area
  • Method for predicting corrosion life of transmission line hardware in industrial area

Examples

Experimental program
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Effect test

Embodiment 1

[0021] (1) Take samples from the fittings on the transmission line of the industrial area to be predicted or from the spare fittings that have been shipped for more than 8 months and have a stable galvanized layer but no red rust, and use a wire cutting machine to cut them from the sample fittings The area of ​​galvanized layer on one side of one piece shall not be less than 1cm 2 1cm×1cm square sample pieces;

[0022] (2) A copper wire is connected to the back side of the galvanized side of the sample piece cut out in step (1), and epoxy resin is used to connect the copper wire together with the side of the sample piece connected to the copper wire encapsulation. The copper wire is connected to the other end of one end of the sample piece as a connecting terminal protruding from the epoxy resin and made into a working electrode for electrochemical testing. After the epoxy resin is cured, first use deionized water to clean the galvanized surface of the sample piece, then use...

Embodiment 2

[0035] Steps (1) to (3) are the same as in Example 1;

[0036] (4) Take analytically pure NaHSO 3 55 grams, 1000 grams of deionized water. The analytically pure NaHSO 3 Add the simulated acid rain solution to the deionized water taken gradually, track and measure the pH value of the configured simulated acid rain solution with a pH acidity meter, and determine that the pH value of the simulated acid rain solution is the same as that obtained in the above step (3) for at least 10 years. The annual mean value of acid rain pH x NaHSO at the same time 3 Concentration. If the difference between the pH value of the simulated acid rain solution and the local pH value x of at least the last 10 years obtained in step (3) is less than 0.03, the NaHSO 3 Add NaOH solution dropwise to the solution until the pH value of the simulated acid rain solution is exactly the same as the local acid rain pH average value x obtained in step (3) for at least the past 10 years;

[0037] Steps (5) t...

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Abstract

The invention discloses a method for predicting the corrosion life of transmission line hardware in an industrial area. The method for predicting the corrosion life of the transmission line hardware in the industrial area comprises the following steps: (1) sampling from the hardware from the transmission line; (2) connecting a copper wire and packaging epoxy resin; (3) calculating the local annual average potential hydrogen (pH) value of acid rain; (4) configuring simulated acid rain solution; (5) putting the simulated acid rain solution into a three-electrode system electrolytic tank to test; (9) calculating annual average rate of the corrosion depth in a medium-long term; (10) measuring the average value of the thickness of the zinc coating of the hardware; and (11) obtaining the rest of corrosion life of the zinc coating. The method for predicting corrosion life of the transmission line hardware in the industrial area has the advantages that the traditional constraints is broken, the thickness of the zinc coating which is arranged on the surface can be measured, evaluations of the corrosion speed and the service life of the transmission line hardware in the industrial area wherein the pH value of the acid rain is <=5.2 can be achieved, the evaluation is fast and accurate, and the safe of power grids is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of electric power engineering, and in particular relates to a method for predicting the corrosion life of metal fittings of power transmission lines in industrial areas. Background technique [0002] In the power system, high-voltage transmission lines are mainly composed of transmission towers, wires and fittings. Among them, fittings are important metal accessories connecting wires and towers, wires and insulators, which play a role in fixing and supporting wires, transmitting mechanical loads and electrical loads. Transmission lines are exposed to the open air for a long time and are subject to wind, frost, rain and snow, and will inevitably encounter corrosion problems. As a connector, the surface shape of the metal fittings is complex and bears a large tensile stress, and its corrosion rate is generally faster than that of iron towers and wires. [0003] At present, the steel fittings are all made of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/02
Inventor 陈军君李明胡波涛王军陈红冬
Owner STATE GRID HUNAN ELECTRIC POWER
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