High-voltage power transmission strain clamp residual life prediction method

A technology of life prediction and tension clamp, applied in prediction, instrument, data processing application, etc., can solve problems such as prediction, inability to carry out remaining life, etc., and achieve the effect of strong versatility

Active Publication Date: 2017-04-26
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In engineering, the infrared temperature measuring equipment under the line tower is used to measure the temperature. Simply judge whether the tension clamp is running abnormally according to the temperature of the clamp, and it is impossible to predict the remaining life.

Method used

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  • High-voltage power transmission strain clamp residual life prediction method
  • High-voltage power transmission strain clamp residual life prediction method
  • High-voltage power transmission strain clamp residual life prediction method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0142] The following is an embodiment of the present invention, which is aimed at NY-400 tension clamps that have been in service for 40 years in a certain area. The specific process of remaining life prediction is as follows:

[0143] Step 1: Obtain the actual operating environment parameters of the tension clamp;

[0144] For the NY-400 tension clamp in service in a certain area, measure and calculate the average value of each parameter in the working environment of the tension clamp, atmospheric pressure P = 1atm, air flow velocity v = 5m / s, outer diameter of the clamp d =45mm, the area of ​​heat dissipation surface F=4.5×45×3.14cm 2 , clamp temperature θ=60℃, air temperature θ 0 =20°C, passing current I=900A and rainwater pH=6.5;

[0145] Step 2: Corrosion rate experiment;

[0146] For the NY-400 strain clamps that have been pressed with aluminum-steel wires, the sodium chloride solution with a mass fraction of 5% was used as the corrosion medium in the laboratory, and ...

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PUM

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Abstract

The invention provides a high-voltage power transmission strain clamp residual life prediction method. The method comprises steps: the actual operation environment parameters of the strain clamp are acquired; a corrosion rate test is carried out to determine a resistance growth rate-corrosion time relation function; a temperature rise test is carried out to determine a heat dissipation coefficient; a lab strain clamp corrosion time-temperature model is built; a service corrosion time and lab corrosion time relation is determined; an environmental correction factor A is calculated and an environmental factor K is determined; critical breakdown temperature is calculated; and the clamp residual life is determined. The method of the invention has the beneficial effects that the residual life of the old and aged strain clamp can not be evaluated can be solved; the method is based on a thermal breakdown principle, strain clamp failure conditions are quantized, and the strain failure judgment is more scientific.

Description

technical field [0001] The invention relates to the technical field of material remaining life prediction, in particular to a method for predicting the remaining life of a strain clamp used for high-voltage power transmission. Background technique [0002] For a long time, the accurate prediction of material life is related to the safety of human life and property. The operating temperature of electric power is generally accepted as an indicator for judging the operating status of power transmission mechanisms; The port of the strain-resistant clamp penetrates into the interior, causing internal corrosion. As the corrosion deepens, the calorific value of the clamp increases. When the corrosion progresses to a certain extent, the interior of the strain-resistant clamp burns and bursts. In engineering, the infrared temperature measuring equipment under the line tower is used to measure the temperature of this situation. It is simply judged whether the tension clamp is running ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06
Inventor 王若民季坤严波杜晓东张涛陈国宏詹马骥王夫成
Owner STATE GRID CORP OF CHINA
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