Method for evaluating mechanical strength of transformer winding under reclosing working condition

By deploying multiple types of sensors on the power transformer windings and using an FPGA synchronous controller, the synchronous collection and correlation analysis of multi-directional deformation data under the impact of reclosing are achieved, which solves the problem of difficulty in evaluating the overall mechanical strength changes of the windings in the existing technology and provides an accurate mechanical strength assessment method.

CN120611564AActive Publication Date: 2025-09-09이너 몽골리아 일렉트릭 파워 그룹 컴퍼니 리미티드 이너 몽골리아 일렉트릭 파워 리서치 인스티튜트 브랜치
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Patent Information

Application Number
CN202510767721.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-10
Publication Date
2025-09-09
Estimated Expiration
2045-06-10

AI Technical Summary

Technical Problem

Existing technologies make it difficult to synchronously collect and correlate the multi-directional deformation data of power transformer windings under reclosing impact, resulting in the inability to accurately assess the changes in overall mechanical strength caused by cumulative deformation.

Method used

By deploying micro-foil strain gauges, MEMS accelerometers and flexible piezoresistive sensors, combined with an FPGA synchronization controller, radial strain, axial acceleration and pad pressure data are synchronously collected. Through Pearson correlation coefficient and partial least squares regression analysis, the synergistic influencing parameters of multi-directional deformation are identified, and a mechanical strength assessment model is established.

Benefits of technology

It realizes the synchronous collection and correlation analysis of multi-directional deformation data of power transformer windings under the impact of reclosing, accurately evaluates the overall mechanical strength changes caused by cumulative deformation, and provides a decision-making basis for the operation and maintenance of power transformers with multi-dimensional test data.

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Abstract

The invention relates to the technical field of mechanical performance testing of power transformer winding materials, in particular to a method for evaluating the mechanical strength of a transformer winding under a reclosing working condition, and the method comprises the steps: obtaining and preprocessing historical operation data, finite element simulation data and laboratory simulation test data; deploying a micro foil strain gauge, an MEMS acceleration sensor and a flexible piezoresistive sensor based on the preprocessed data, and synchronously collecting radial strain, axial acceleration and cushion block pressure data; after noise filtering, time alignment and feature extraction, multi-directional deformation cooperative influence is analyzed through methods of Pearson's correlation coefficients, partial least square regression and the like; and in combination with a historical damage sample training evaluation model, outputting a mechanical strength degradation level in real time. According to the method, the problems of synchronous acquisition and correlation analysis of multi-direction deformation data under reclosing impact are solved, and accurate evaluation of overall mechanical strength change caused by accumulated deformation is realized.
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