基于瞬变电磁成像技术的接地网腐蚀缺陷检测方法

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中图分类号：TB9 文献标志码：A

文章编号：1674-5124（2026）02-0128-07

Abstract： As a relief channel for electrical equipment， the normal operation of the grounding network is essential to ensure the safety of the power network.As the grounding network is buried in the ground， it is susceptible to soilcorrosion and various stray currents or short-circuit current erosion，resulting in corrosion or defects such as breakpoints.This phenomenon leads to corrosion or breakpoints and other defects，which causes the power system and personal safety potential danger. In this paper， a corrosion defect detection method is proposed for grounding network based on transient electromagnetic imaging technology. The method detects the inductive signals of the grounding network by transmiting pulsed currents to the excitation coil， which in tum inverts the apparent resistivity inside the grounding network. Rapid diagnosis of possible breakpoint faults in the grounding network based on scanning imaging results.According to the transient response signals calculated by COMSOL Multiphysics，the validity and feasibility of the proposed method is demonstrated by comparing the results of defect-free and defective apparent resistivity imaging.

Keywords： grounding network; transient electromagnetic technology; apparent resistivity imaging; corrosion defect detection

0引言

接地网作为电气设备的泄流通道，在电力系统中承担着至关重要的角色，能够将电气设备在正常运行或故障状态下产生的电流迅速、安全地导入大地，有效防止电流泄漏、短路或过载等潜在风险，从而确保电力设备和整个电力网络免受损害[1-2]。（剩余9611字）