Rail-to-ground Insulation Defect Diagnosis Method Based on Spatiotemporal Correlation of Rail Potential
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 4
Abstract
Objective The data of various monitoring points regarding rail potential as monitoring object is correlated in time and space, and the direct manifestation of changes in rail-to-rebar structural resistance is reflected in rail potential variation. It is aimed to explore a method for monitoring the rail-to-ground insulation state and diagnosing defects based on rail potential spatiotemporal correlation. Method The stray current monitoring system with rail potential as the monitoring object is elaborated. The characteristics of rail potential data under insulation defects are analyzed and a feature matrix for the data is established. Based on the anomaly detection principle of Minkowski distance, the detection steps for abnormal sections of rail-to-ground insulation and for insulation defect locationing are explained. A project in Qingdao Rail Transit is taken as study case for modeling and simulation to evaluate the effectiveness and accuracy of the proposed method. Result & Conclusion The proposed method can effectively monitor the rail insulation state and accurately locate insulation defects.
Authors and Affiliations
Weiguo PAN, Tian LI, Hexiang WU, Xiaopeng HUANG, Wei LIU
Keywords
Related Articles
- EP ID EP734169
- DOI 10.16037/j.1007-869x.2024.04.023
- Views 67
- Downloads 0
Optimization of Metro Tunnel Maintenance Strategy Based on Improved Particle Swarm Algorithm
[Objective] Maintenance strategy is the key factor influencing the lifetime service performance and maintenance cost of metro tunnel. Therefore, it is essential to develop more suitable optimization algorithms for mainte...
Impact Analysis of Pipe Jacking Crossing and Parallel Construction on Existing Metro Shield Tunnels
［Objective］ In underground excavation projects, the working conditions of tunnels crossing each other are becoming increasingly frequent and complex. It is therefore imperative to investigate their interactions and mut...
Transport Capacity Enhancement for Shanghai Urban Rail Transit Existing Lines
Objective Aiming to propose effective methods and specific cases for capacity enhancement, the implementation experiences of capacity improvement renovation projects on existing Shanghai urban rail transit lines are syst...
Reasonable Avoidance Distance of Metro Shield Tunnels under Normal Fault Dislocation
[Objective] Normal fault dislocation is prone to cause instability and damage to metro shield tunnels. Therefore, it is necessary to study the mechanical characteristics of shield tunnels under normal fault dislocation a...
Application of Visual Three-Position Isolation and Grounding Integration Device Replacing Visual Grounding Device
［Objective］ Disconnector is a key equipment in rail transit traction power supply system. With the development of intelligent switch equipment technology and the increasing demand for intelligent operation and maintena...