Buffer layer ablation current live-line detection system and method based on magnetic field effect

Abstract

The invention relates to a buffer layer ablation current live-line detection system and method based on a magnetic field effect. The system comprises a magnetic field sensing element with a sensitiveshaft, a fixing module, a magnetic shielding module, a signal transmission module, a signal conditioning module, a signal receiving module and a power supply module. The ampere loop theorem is used for detecting the magnetic field signal with the fixed direction, live testing is achieved under the condition that the structure and the operation state of the power cable are not changed, and the testing method is simple and visual. The magnetic field sensing element with the sensitive shaft has high-precision and wide-range magnetic field detection capability, and detection data is accurate and reliable by combining shielding of the magnetic shielding module on external magnetic field interference.

Description

technical field [0001] The invention relates to the technical field of cable design, in particular to a buffer layer ablation current charging detection system and method based on magnetic field effects. Background technique [0002] The technological level of my country's power cable insulation manufacturing has reached the world's advanced level. With the wide application of high-voltage corrugated aluminum sheathed high-voltage power cables with a buffer layer structure, the number of failures is on the rise. Among them, the insulation shock caused by buffer layer ablation Wear-through faults are one of the more typical faults. The faults involve different manufacturers and occur all over the country. According to the analysis of more than ten body breakdown faults and defects in Beijing, Shanghai, Jiangsu, Hunan and other places, it is found that the fault phenomena are basically the same. The insulation breakdown fault caused by the discharge ablation of the cable buffe...

AI Technical Summary

Problems solved by technology

At present, the cable operation and maintenance unit has not proposed an effective evaluation method to evaluate the ablation state of the buffer layer of the cable in operation, resulting in the management unit being unable to take measures to prevent the spread and spread of defects. Therefore, it is urgent to expand new detection systems and evaluation methods to effectively Evaluate buffer ablation defects to avoid cable failures

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