COMSOL-based steel-cored aluminum stranded wire defect research method

Abstract

The invention discloses a COMSOL-based steel-cored aluminum stranded wire defect research method. The method comprises the following steps: S1) establishing a three-dimensional model of the steel-cored aluminum stranded wire under a defect-free condition and a three-dimensional model of the steel-cored aluminum stranded wire under a defect condition by adopting COMSOL software, and solving a spatial electric field change rule of the corresponding steel-cored aluminum stranded wire; S2) comparing the spatial electric field change rule of the steel-cored aluminum stranded wire under the defect condition with the spatial electric field change rule of the steel-cored aluminum stranded wire under the defect-free condition to obtain the spatial electric field change characteristics of the steel-cored aluminum stranded wire under the defect condition; and S3) judging the defect type of the steel-cored aluminum stranded wire to be detected according to the spatial electric field change characteristics of the steel-cored aluminum stranded wire under the defect existence condition in the step S2). The COMSOL-based steel-cored aluminum stranded wire defect research method provided by the invention can provide a reliable basis for judging the defect type of the steel-cored aluminum stranded wire.

Description

technical field [0001] The invention relates to the technical field of researching defects of aluminum-steel-cored wires, in particular to a method for researching defects of aluminum-steel-cored wires based on COMSOL. Background technique [0002] In recent years, with the rapid development of my country's power industry, the power network level has been comprehensively improved. The upgrade of the power grid level from 500kV EHV power grid to 1000kV UHV power grid has made the scale of the power grid increasingly larger, and the erection distance of transmission lines is also increasing day by day. As one of the main parts of the transmission line, the steel-cored aluminum stranded wire is mainly used to connect the power grid and transmit electric energy. When there are surface defects in the steel-cored aluminum stranded wire, it will cause local field strength distortion, which may cause corona or even discharge, thereby threatening the normal operation of the line. F...

AI Technical Summary

Problems solved by technology

The surface of the steel-cored aluminum strand will be corroded, which will increase the surface roughness of the steel-cored aluminum strand and form burrs; when encountering strong influencing factors, such as strong winds, the surface of the steel-cored aluminum strand is covered with ice, snow, etc. Factors, since the ACSR is suspended between the two towers, the ACSR on the line will swing. If the swing of the line is large, the external force generated by the swing of the line will pull the ACSR. wire, so that the steel-cored aluminum stranded wire is deformed, and when the pulling force is large, it will cause the steel-reinforced aluminum stranded wire to break

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