A method and system for monitoring multiple parameters of a medium-high voltage power distribution cabinet and early warning of arc fault

By monitoring multiple parameters of medium and high voltage switchgear and combining operating status, electrical transients and compartment monitoring data, the system can accurately distinguish and locate switch operation disturbances and fault arcs, solving the identification problem in the existing technology and improving the accuracy of fault identification and the reliability of power supply.

CN122238801APending Publication Date: 2026-06-19BEIJING GUANGFA ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING GUANGFA ELECTRIC CO LTD
Filing Date
2026-05-20
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In medium and high voltage switchgear, when switch operation disturbances and initial fault anomalies are intertwined, it is difficult to accurately distinguish between normal operating arcs and actual fault arcs, and it is difficult to balance timeliness and accuracy in the identification of complex abnormal processes.

Method used

By collecting operating status data, electrical transient data, and compartment monitoring data during switch operation, an operation disturbance window and an event observation window are established. Time sequence comparison and consistency judgment are performed. Combined with the initial compartment, the time period of abnormal occurrence, the characteristics of abnormal repetition, and the characteristics of abnormal persistence, the fault arc is accurately identified and located.

Benefits of technology

It enables effective differentiation between normal operating arcs and faulty arcs, improves the accuracy and timeliness of fault identification, reduces the false tripping rate, and ensures the continuity and reliability of power supply.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to the field of electrical monitoring and early warning technology, and discloses a method and system for multi-parameter monitoring of fault arcs in medium and high voltage switchgear. The method includes: collecting operating status data, electrical transient data, and compartment monitoring data during switch operation; establishing an operation disturbance window; establishing an event observation window when the electrical transient data or compartment monitoring data meets the triggering conditions; performing a time-series comparison between the event observation window and the operation disturbance window; when the windows overlap, determining the consistency of the operation arc based on the initial compartment, the time period of abnormal occurrence, the characteristics of abnormal repetition, and the characteristics of abnormal persistence, and obtaining a normal operation arc result or a suspected fault arc result; when a suspected fault arc result is obtained, or when the event observation window and the operation disturbance window do not overlap, performing a sequential closure judgment to obtain a fault arc confirmation result; performing joint positioning to obtain the target compartment, and outputting a cut-off command. This application reduces the false alarm rate and improves the reliability of the early warning.
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