A method, system, device and medium for evaluating the operating condition of an overhead line external insulation device of a distribution network

By identifying discolored coverings on the surface of insulating equipment and linking them to monitoring modes, electrical response data within the natural humidity change cycle is locked in. Combined with a cloud-based case library to optimize attribution judgment, the problem of attribution ambiguity in the evaluation of external insulation equipment in distribution networks is solved, achieving accurate evaluation and adaptive decision-making.

CN122598144APending Publication Date: 2026-08-18GUIZHOU POWER GRID CO LTD
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Patent Information

Application Number
CN202610419371.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-01
Publication Date
2026-08-18

AI Technical Summary

Technical Problem

The existing assessment methods for external insulation equipment in distribution networks are independent of each other and lack a multi-physical quantity fusion mechanism, which leads to ambiguous attribution and difficulties in operation and maintenance decisions, making it difficult to distinguish between electrical anomalies caused by surface bird droppings contamination and internal cracks.

Method used

By acquiring surface images of the target insulation equipment to identify discolored coverings, collecting leakage current and partial discharge intensity in real time, locking in dynamic response data within the first natural humidity change cycle, performing similarity searches with the cloud case library, updating attribution judgment weight parameters, and generating an evaluation report.

Benefits of technology

It enables early and accurate perception of the contamination status of insulating equipment, eliminates random noise interference, and improves the accuracy of attribution judgment of abnormal signals and the generalization ability of assessment reports.

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Abstract

The application discloses a kind of distribution network overhead line external insulation equipment operating condition evaluation method, system, equipment and medium, comprising: obtaining target insulation equipment surface image and identifying new color covering, if there is, generate time stamp containing contamination event record and set to strengthen monitoring mode;When in strengthening monitoring mode, real-time acquisition leakage current and partial discharge intensity, any parameter is over threshold value, then obtain the dynamic response data in the first natural humidity change period after contamination event record;Dynamic response data is compared with benchmark response characteristics, and attribution judgment result is generated by fusing contamination characteristic information;Attribution judgment result and dynamic response data are stored in digital twin archives;Based on digital twin archives, extract feature vector and carry out similarity search with cloud case base, update attribution judgment weight parameter, obtain external insulation equipment operating condition evaluation report.The application effectively improves the accuracy of fault diagnosis and the intelligent level of equipment operation and maintenance.
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