A method for integrated detection of fault discharge and partial discharge and related products

By uniformly adopting zero-sequence current and zero-sequence voltage for graded conditioning and logical judgment, integrated detection of fault discharge and partial discharge is achieved. This solves the problems of repeated equipment investment and complex operation and maintenance caused by independent detection schemes in existing technologies, realizes collaborative analysis and accurate monitoring of fault discharge and partial discharge, and improves the operational safety and reliability of medium-voltage overhead power distribution networks.

CN122218408APending Publication Date: 2026-06-16POWER RES INST OF STATE GRID SHAANXI ELECTRIC POWER CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
POWER RES INST OF STATE GRID SHAANXI ELECTRIC POWER CO LTD
Filing Date
2026-02-28
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

In existing technologies, fault discharge and partial discharge detection schemes are independent of each other, resulting in repeated investment in equipment, conflicting installation spaces, incompatible data platforms, and complex operation and maintenance management. They cannot achieve collaborative analysis of fault discharge and partial discharge, and are difficult to meet the needs of medium-voltage overhead power distribution networks for comprehensive equipment status monitoring.

Method used

Using unified zero-sequence current and zero-sequence voltage as the basic detection parameters, and through hierarchical conditioning and logical judgment, the integrated detection of fault discharge and partial discharge is realized. This includes conditioning processes such as low-pass filtering, low-noise amplification, and high-pass filtering. Combined with the calculation of dynamic protection setting current value and cumulative discharge energy per unit time, the orderly detection and priority differentiation of fault discharge and partial discharge are achieved.

Benefits of technology

It enables the coordinated analysis of fault discharge and partial discharge, improves the accuracy and efficiency of detection, ensures rapid identification of fault discharge and accurate monitoring of partial discharge, reduces the probability of false positives and false negatives, and enhances the operational safety and reliability of the power grid.

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Abstract

The application discloses a kind of integrated detection method of fault discharge and partial discharge and related products, belong to line fault detection technical field.The integrated detection method of fault discharge and partial discharge provided by the application, after judging the effective of zero sequence voltage, dynamic protection setting current value is calculated based on real-time zero sequence voltage, and the size of zero sequence current is compared to judge fault discharge;If not fault discharge, the original zero sequence current is secondarily conditioned to obtain the partial discharge current to be measured, and the discharge energy per unit time is calculated based on zero sequence voltage and the partial discharge current to be measured, and the discharge energy threshold value is calculated based on zero sequence current, and the partial discharge is judged by comparing the two.The integrated detection method of fault discharge and partial discharge provided by the application realizes the unity of fault discharge and partial discharge detection, and at the same time, the accuracy and reliability of detection are improved by adaptive dynamic protection setting current value and discharge energy threshold value criterion.
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