Multi‐state unified calculation model of rail potential and stray current in DC railway systems

Du, Guifu; Zheng, Zixuan; Li, Qiaoyue; Xu, Fengchuan; Zhang, Tianye; Zhang, Dongliang; Zhang, Xiaoping; Huang, Weiguo

doi:10.1049/els2.12070

Cited by 5 publications

(1 citation statement)

References 23 publications

(42 reference statements)

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“…A significant modeling and simulation effort has developed through the years in order to understand the coupling mechanisms and to globally address the problem with suitable design choices and provisions [16][17][18][19][20]. Prevention and compensation of stray current is, in fact, taking place by means of various systems: optimization of traditional track and transit systems [21,22], passive stray current collection systems [23], traditional track voltage limitation [4,24], active track potential control and redistribution of traction current [25,26].…”

Section: Introductionmentioning

confidence: 99%

Uncertainty of Standardized Track Insulation Measurement Methods for Stray Current Assessment

Bhagat

Bongiorno

Mariscotti

2023

Sensors

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Stray current is a relevant phenomenon in particular for DC electrified transportation systems, affecting track and infrastructure within the right of way and other structures and installations nearby. It worsens with time and the level of protection depends on timely maintenance, as well as correct design choices. The assessment of track insulation is the starting point for both stray current monitoring systems and at commissioning or upon major changes. Standardized methods (ref. EN 50122-2 or IEC 62128-2) have been almost unchanged in the last 20 years but suffer from accuracy issues and variability due to parameters and conditions not under the operator’s control. The uncertainty of test methods is increasingly important now that contractual specifications require a high level of insulation for new systems. A critical discussion and analysis of the sources of variability and practical constraints is proposed, followed by an evaluation of uncertainty, with the objective not only to assess the accuracy of the provided results, but also to foster research on innovative, more flexible and accurate methods.

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