Intelligent fusion terminal secondary circuit power frequency withstand voltage test device and method thereof

By collecting and analyzing dust, spatial distance, and environmental data, and dynamically adjusting the test voltage and making adaptive adjustments, the problems of high misjudgment rate and insufficient fault diagnosis in the power frequency withstand voltage test of the secondary circuit of the intelligent fusion terminal are solved, and more accurate insulation assessment and fault cause analysis are achieved.

CN122171955APending Publication Date: 2026-06-09SHUBANG POWER TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHUBANG POWER TECH CO LTD
Filing Date
2026-04-07
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing intelligent fusion terminal secondary circuit power frequency withstand voltage tests neglect the equivalent shortening effect of dust adhesion on creepage distance, the impact of dust conductivity differences on insulation performance, electric field distortion, lack of scientific basis for fixed thresholds, lack of adaptive adjustment mechanisms and fault cause diagnosis functions, resulting in a high misjudgment rate.

Method used

Data such as dust coverage, conductivity, spatial distance, ambient temperature and humidity, and historical pollution levels are collected. The comprehensive dust impact factor and spatial distance impact factor are calculated, and the comprehensive environmental correction coefficient is obtained. The test voltage is dynamically adjusted, and adaptive adjustment is performed through the real-time leakage current change rate. A dynamic threshold range is set, and multi-level judgments are made to diagnose the cause of the fault.

Benefits of technology

It improves the accuracy of insulation determination, avoids equipment damage, provides accurate fault cause diagnosis, and significantly enhances the scientific nature of operation and maintenance decisions and the reliability of equipment operation.

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Abstract

This invention discloses an intelligent fusion terminal secondary circuit power frequency withstand voltage test device and method, belonging to the field of insulation testing technology. The method includes: collecting dust coverage rate, dust conductivity, spatial distance, ambient temperature and humidity, and historical cumulative pollution levels; calculating the comprehensive dust influence factor and the coupled spatial distance influence factor; obtaining a comprehensive environmental correction coefficient by combining temperature, humidity, and historical pollution levels; calculating the initial dynamic test voltage based on the standard voltage and correction coefficient, and adaptively adjusting it according to the leakage current change rate during the voltage boosting process to obtain the final test voltage; dynamically calculating the confidence coefficient using a t-distribution based on historical data, and setting the dynamic threshold range for the leakage current; applying the final test voltage, collecting the measured leakage current for range determination, and outputting maintenance suggestions based on the contribution degree when the test fails, thus diagnosing the fault cause. This invention achieves a collaborative quantitative evaluation of multiple factors, improving the accuracy and intelligence level of insulation determination.
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