A test method for operating parameters when copper wires of power transmission and transformation equipment are broken

Abstract

The invention relates to a method for testing operating parameters in breakage of a copper wire of electric transmission and transformation equipment. The method includes steps of sampling from practical burnout equipment, selection of an intact wire of identical specification and preparation into a high-temperature simulation sample, Gleeble tensile experiment at different temperatures, metallographic analysis on fractures of a practical broken wire and a broken wire pulled by GLEEBLE, SEM analysis on the fractures of the practical broken wire and the broken wire pulled by GLEEBLE, TEM analysis on the fractures of the practical broken wire and the broken wire pulled by GLEEBLE, and the like. High cost of destructive tests of practical power transmission and transformation equipment underseries parameters is avoided, most approximate operating parameters in breakage instantaneity in operation can be obtained, and accordingly effective criterions can be provided for accident analysis.

Description

technical field [0001] The invention relates to a method for testing operating parameters when copper wires of power transmission and transformation equipment are broken, and belongs to the technical field of metal materials. Background technique [0002] Copper wires are widely used in power transmission and transformation equipment, and wire breakage is one of the common faults in the operation of power transmission and transformation equipment. When a fracture occurs, it is often subjected to a large electric force and a large current, and fracture occurs at a high temperature, thereby affecting the normal operation of the power transmission and transformation equipment. Determining the operating parameters of the copper wire at the time of fracture, including current, temperature at the time of fracture and the magnitude of the external force it bears, is of great significance for analyzing the cause of wire fracture and avoiding similar accidents. [0003] At the momen...

AI Technical Summary

Problems solved by technology

[0003] At the moment when the wires of the power transmission and transformation equipment are broken, the current often exceeds the design current by several times, and at the same time, the wires are heated and the temperature rises. , under the combined action of high temperature and electromotive force, the wire is prone to breakage, which is usually completed in a short period of time. According to the current monitoring methods, it is impossible to record the operating parameters at the moment of breakage

If the destructive test is carried out directly on similar equipment and then the microscopic analysis is performed, it is often necessary to conduct destructive tests on multiple equipment under a series of parameters, the cost is too expensive, and the effect may not be able to meet the expected requirements

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