Online evaluation method for residual service life of insulated bus duct

By combining the Arrhenius thermal aging model and online temperature monitoring, the incremental thermal aging loss of the insulated busbar trunking is calculated in real time and accumulated to the total value. This solves the problem of bias in the evaluation results in the existing technology, realizes the quantification and comparability of the aging degree of the insulation material, and improves the scientific nature and initiative of the operation and maintenance of the busbar trunking.

CN122171916APending Publication Date: 2026-06-09GUANGDONG BOSS ELECTRICAL APPLIANCES CO LTD
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Patent Information

Application Number
CN202610510873.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-17
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies cannot track the cumulative aging of insulation materials in insulated busbar trunking under varying operating conditions in real time without power interruption or disassembly, resulting in significant discrepancies between the assessment results and the actual aging state. Furthermore, the complex data fusion model consumes high computational resources and has poor universality.

Method used

By combining the Arrhenius thermal aging model with online temperature monitoring data, and through a discretization process of time-sharing sampling, single-step loss calculation, and cumulative summation, the incremental thermal aging loss of insulating materials is calculated in real time and accumulated to the historical total value to form a dimensionless life consumption index, which is suitable for embedded data processing devices or remote monitoring platforms.

Benefits of technology

It enables the quantification and comparison of the aging degree of insulation materials under varying temperature and load conditions, provides intuitive quantitative indicators of remaining life, improves the scientific nature and initiative of busbar operation and maintenance, and reduces the consumption of computing resources.

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Abstract

The invention discloses an online evaluation method for the remaining service life of an insulated bus duct, and belongs to the technical field of power equipment. The method comprises the following steps: acquiring reference thermal life parameters of an insulating material, wherein the reference thermal life parameters comprise activation energy and a frequency factor; acquiring real-time temperature data in operation according to a sampling period; on the basis of the temperature data, utilizing an Arrhenius equation to calculate a characteristic life value at the current temperature, and taking the ratio of the sampling period duration to the characteristic life value as the thermal aging loss increment of the period; accumulating the loss increment to a historical accumulated thermal aging loss total value; and judging whether the accumulated value reaches a life end threshold, and if not, calculating and outputting a residual service life evaluation result. According to the method, the thermal aging model is combined with on-line temperature monitoring, dynamic evaluation under the variable-temperature working condition is achieved in a time-sharing sampling and loss accumulation discretization mode, the problem that the accumulated aging of the actual operation working condition cannot be reflected through off-line evaluation is solved, the algorithm is simple, the deployment cost is low, and the method is suitable for on-site on-line monitoring of the bus duct.
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