A transformer bushing insulation state evaluation method and system based on time-frequency domain data, equipment and medium

By combining time-frequency domain data and the Debye equivalent circuit model with the FPA optimization algorithm, the problems of limited information acquisition and low efficiency of traditional algorithms in transformer bushing insulation condition assessment are solved, and high-precision insulation condition parameter identification is achieved.

CN122430652APending Publication Date: 2026-07-21STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
Filing Date
2026-04-24
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing methods for assessing the insulation status of transformer bushings rely on a single dielectric response technique, resulting in limited information acquisition, limitations and uncertainties in the analysis results, and traditional optimization algorithms are prone to getting trapped in local optima, leading to low parameter identification efficiency.

Method used

A Debye equivalent circuit model based on time-frequency domain data is adopted, and combined with the FPA optimization algorithm, the initial Debye model is optimized through the pollen propagation process so that it can fit both time-domain and frequency-domain measurement data. The branch parameters are iteratively adjusted to improve the accuracy and efficiency of parameter identification.

Benefits of technology

This improves the accuracy and efficiency of identifying transformer bushing insulation condition parameters, reduces errors from extracting single data points, and ensures the reliability and accuracy of diagnostic conclusions.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122430652A_ABST
    Figure CN122430652A_ABST
Patent Text Reader

Abstract

The present application relates to the technical field of power equipment insulation state evaluation, in particular to a transformer bushing insulation state evaluation method and system based on time-frequency domain data, equipment and medium, the method provided by the present application mainly includes optimizing the parameters of the initial Debye equivalent model, fitting the time domain measurement data and the frequency domain measurement data with the initial Debye equivalent model at the same time, until the fitting error is minimized and the branch equivalent time parameter is determined, and the optimized initial Debye equivalent model is obtained; the initial Debye equivalent model is used to calculate the transformer bushing insulation state parameters. Through the above method, the time domain measurement data and the frequency domain measurement data are combined, the problem of large error of key performance parameters extracted from single data is avoided as much as possible, and the parameter identification accuracy and efficiency of the Debye equivalent model are improved.
Need to check novelty before this filing date? Find Prior Art