Detector for judging live-line fault point of zero line of transformer

Through the non-contact transformer neutral line live fault point judgment detector, using topology recognition and feature matching technology, combined with impedance phase comparison and traveling wave ranging, accurate fault location in complex environments can be achieved, solving the problems of positioning drift and low sensitivity of traditional detectors in complex environments, and improving detection efficiency and safety.

CN120802131AActive Publication Date: 2025-10-17STATE GRID JIANGSU ELECTRIC POWER CO LTD CHANGZHOU BRANCH
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Patent Information

Application Number
CN202511310595.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-15
Publication Date
2025-10-17
Estimated Expiration
2045-09-15

AI Technical Summary

Technical Problem

Traditional transformer electrical parameter detectors are unable to accurately locate faults in complex power grid environments, resulting in positioning drift, low detection success rate, high repetitive fault rate, and long time consumption. In addition, the sensitivity is reduced in humid, dusty or strong electromagnetic radiation areas, affecting the timeliness of emergency repairs.

Method used

A non-contact transformer neutral line live fault point judgment detector is used. Through topology recognition and feature matching, combined with impedance phase comparison and traveling wave ranging dual-mode positioning, accurate anti-interference positioning is achieved. It is equipped with AR real-scene navigation and sound and light alarm systems to reduce the risk of manual contact.

Benefits of technology

It greatly improves detection efficiency and safety, reduces power outage losses, lowers costs, and is suitable for the popularization of grassroots power supply. It has a 300-fold increase in positioning speed and a 60% detection success rate, reducing the rate of repeated failures.

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Abstract

The invention provides a transformer null line live-line fault point judgment detector, and relates to the field of power fault diagnosis equipment. The transformer null line live-line fault point judgment detector comprises a three-layer design architecture including a sensing layer, an analysis layer and an interaction layer, the sensing layer carries out signal capture by setting a broadband electromagnetic induction array, the sensing layer is composed of electromagnetic induction array hardware and a frequency coverage module, and high-sensitivity electromagnetic capture is realized by cooperating with a spatial arrangement technology. The hardware of the electromagnetic induction array is eight groups of nanocrystalline alloy induction coils which are annularly distributed, and each group of coils is connected in series with a 0.1 mu F high-frequency capacitor. Accurate anti-interference is realized through topology identification and feature matching, the positioning speed is improved by 300 times, the detection efficiency is greatly improved, meanwhile, the power failure loss is reduced, the economic benefit is remarkably improved, and the risk of manual contact with a live line is thoroughly eliminated.
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