Online diagnosis method for abrasion of contact of high-voltage switch cabinet

By extracting multi-dimensional time-frequency domain features from time-aligned vibration and current signals, and combining this with analysis of historical operation counts and environmental temperature and humidity, the reliability and accuracy issues of high-voltage switchgear contact wear diagnosis are resolved, enabling efficient wear condition assessment and maintenance recommendations.

CN121834390AInactive Publication Date: 2026-04-10SHANGQIU KETINGRUI INTELLIGENT TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202511687125.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-18
Publication Date
2026-04-10
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing methods for diagnosing contact wear in high-voltage switchgear rely on single signal analysis, which cannot fully capture the contact movement state and wear characteristics. They also lack a systematic wear state matching mechanism, resulting in insufficient reliability and repeatability of diagnostic results.

Method used

Multi-dimensional time-frequency domain feature extraction is performed using vibration and current signals based on time alignment. Combined with historical operation counts and environmental temperature and humidity, multi-factor coupling analysis is conducted to generate target wear diagnosis results. Efficient conversion is achieved through communication protocol encapsulation and instruction mapping.

Benefits of technology

It significantly improves the accuracy and completeness of contact motion feature extraction, enhances the comprehensiveness and precision of wear diagnosis, and improves the timeliness and accuracy of high-voltage switchgear maintenance decisions.

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Abstract

The invention relates to the technical field of electrical measurement, and discloses a high-voltage switch cabinet contact wear on-line diagnosis method, which comprises the following steps: extracting multi-dimensional time-frequency domain characteristics of a high-voltage switch cabinet contact based on vibration and current signals of time sequence alignment to obtain contact motion characteristics; wear state matching is carried out on the features to obtain the wear degree of the contact, and then a preliminary wear diagnosis result is generated through wear label association; performing multi-factor coupling analysis in combination with historical operation times and environment temperature and humidity, evaluating a wear accumulation effect and an oxidation influence degree, and further generating a target wear diagnosis result; and finally, performing communication protocol packaging on the result to form a wear diagnosis data message, and outputting a maintenance suggestion instruction through instruction mapping. The reliability of contact diagnosis of the high-voltage switch cabinet can be improved.
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