Work

Novel method for rail insulation degradation diagnosis driven by diffusion law of stray current

Year: 2025

Type: article

Abstract: The degradation of the rail to earth insulation performance is the primary factor contributing to the increased leakage of stray currents. It is difficult to locate rail to earth insulation degradation or assess their severity in urban rail transit systems. To overcome this problem, a novel diagnostic method for rail to earth insulation degradation is proposed. This method, which is based on the diffusion law of stray current and characterizes rail to earth admittance by utilizing the field circuit coupling model, utilizes multi-source synchronous monitoring data to construct the optimization algorithm and achieve precise calculation of the rail to earth admittance. The verification for the effectiveness of rail to earth insulation defect diagnosis principle by a laboratory physical simulation platform. Using actual subway line parameters, the error of the diagnostic algorithm is analyzed through cases. Most errors are below 5%. To address errors caused by uneven tunnel resistivity, a correction measure involving segmental parameter adjustments is proposed.

Source: International Journal of Electrical Power & Energy Systems

DOI: 10.1016/j.ijepes.2025.110965

Authors: Songyuan Li, Wei Liu, Qingan Ma, Feilong Liu, Zhuoxin Yang, Shuangrui Yang

Institution: Southwest Jiaotong University

Language: English

Topic: Transportation Systems and Safety

Subfield: Computer Graphics and Computer-Aided Design

Field: Computer Science

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $3,920