Insulator defect detection method and device and storage medium

By constructing a polarity conduction screening model and an interfacial electrochemical mass transfer composite index, the problem of misjudgment due to the difficulty in distinguishing interfacial signals of insulator materials in existing technologies has been solved, enabling accurate detection of insulator defects and improving identification accuracy and robustness.

CN121578075AActive Publication Date: 2026-02-27STATE GRID ANHUI ELECTRIC POWER CO LTD +1
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Patent Information

Application Number
CN202610094756.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-23
Publication Date
2026-02-27
Estimated Expiration
2046-01-23

AI Technical Summary

Technical Problem

Existing insulator defect detection technologies struggle to effectively distinguish between slow-varying components caused by the physical and chemical properties of material interfaces and genuine dry-charge arc discharge signals. This leads to misjudgments when faced with complex current signals, resulting in missed detections of potential hazards or false alarms.

Method used

By collecting leakage current signals from insulators, a polarity conduction screening model is constructed. The signals are then subjected to asymmetric weighting to generate composite current sequences. The nonlinearity of their decay rate is analyzed, an interfacial electrochemical mass transfer composite index is generated, the polarization background benchmark is stripped, the residual of abnormal discharge pulses is quantified, and a suppressive normalization operation is performed to output the results of pollution flashover hazard assessment.

Benefits of technology

It achieves the quantification of complex interface dynamics, accurately removes diffusion background references, effectively suppresses environmental noise interference, and significantly improves the accuracy and robustness of identifying weak hidden danger signals such as early dry arcing.

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Abstract

The invention relates to the technical field of power system state monitoring, and discloses an insulator defect detection method and device and a storage medium, and the method comprises the steps: collecting the leakage current of an insulator, and constructing a polarity conduction screening model through power frequency phase information, so as to generate a composite current sequence which highlights the polarization attribute of an interface; analyzing the nonlinear degree of the attenuation rate of the sequence drifting along with evolution time in a multi-stage diffusion evolution time domain, and generating an interface electrochemical mass transfer composite index; utilizing the index to invert and construct an interface polarization background reference and stripping the interface polarization background reference from the composite current sequence so as to extract an abnormal discharge pulse residual error; and finally, quantizing the pulse form distortion degree of the residual error, and performing suppression normalization operation on the distortion degree by using the index to output a judgment result. According to the invention, the interference of the interface mass transfer process is effectively eliminated, and the specific detection of the pollution flashover hidden danger is realized.
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