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Electric system steel-cored aluminum strand failure analysis method

A steel-cored aluminum stranded wire, failure analysis technology, applied in the direction of analyzing materials, using the measurement of secondary emissions for material analysis, measuring electricity, etc., can solve problems such as power outage accidents, broken strands of lines, and reduction of mechanical and electrical properties of wires

Active Publication Date: 2014-11-26
STATE GRID CORP OF CHINA +1
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  • Description
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AI Technical Summary

Problems solved by technology

After atmospheric corrosion and fretting wear, the mechanical and electrical properties of ACSR wires are reduced. After years of accumulation, it may lead to broken strands, disconnected wires, or even power outages, resulting in immeasurable losses.

Method used

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Examples

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Embodiment Construction

[0053] The implementation of the present invention will be described in further detail below. The following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0054] A failure analysis method for steel-cored aluminum stranded wires in a power system, the method steps are as follows:

[0055] (1) Collect technical data, mainly including:

[0056] ① Design data collection: technical requirements for wire materials, manufacturing and processing technology, failure position, wire type, main parameters, factory data, inspection records;

[0057] ②Service condition collection: understand the service time, operating parameters, past failure causes and replacement conditions, and environmental details of the conductors;

[0058] ③ On-site investigation data collection: to know whether the operating conditions on the eve of failure and when the failure occurs, whether there is abnormal vibration of the wire when the failure ...

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Abstract

The invention relates to an electric system steel-cored aluminum strand failure analysis method. The method comprises the steps that (1) technical data are collected; (2) examination and analysis tests are carried out, wherein the examination and analysis tests comprise macroscopic examination, component analysis, electrochemical corrosion analysis, electron microscopy and energy spectrum analysis, a specific resistance test and a tensile test; (3) wire failure reasons are analyzed by synthesizing the results of the tests, a conclusion is obtained, and a failure analysis result is provided. The electric system steel-cored aluminum strand failure analysis method is used for guiding supervision and inspection work, the failure type of a wire can be rapidly judged when the wire is invalid, and accident reasons are found out.

Description

technical field [0001] The present invention is in the technical field of the steel-cored aluminum stranded wire of the power system, in particular to a failure analysis method of the steel-cored aluminum stranded wire of the power system. Background technique [0002] The failure of wire breakage is the enemy of power grid security, which causes great economic losses to the power transmission of the power grid, and has a great impact on the primary and secondary equipment of the power system, and the replacement of wires requires a lot of time and manpower and material resources. At present, there is no perfect supervision and inspection method for conductors, which is limited to tests such as appearance inspection and component analysis. As the voltage level increases, the requirements for current carrying and force of conductors are greatly improved, and the traditional inspection mode is gradually unable to meet the needs. Through comprehensive analysis and testing of va...

Claims

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Application Information

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IPC IPC(8): G01R31/02G01N17/02G01N23/22G01R27/02G01N3/00
Inventor 叶芳马崇程明陈韶瑜李庆钊
Owner STATE GRID CORP OF CHINA
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