Measurement and Evaluation of the Stray Currents from the DC Electric Traction Systems

Siranec, Marek; Regula, Michal; Otcenasova, Alena; Altus, Juraj

doi:10.1109/elektro49696.2020.9130262

Cited by 2 publications

(1 citation statement)

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“…Reference [10] presents a dynamic model that is a combination of the ideal and real-world cases, and integrated walls are considered for the tunnel body to prevent the stray current from leaving the established fence and damaging the structures. Different earthing systems and their performance with respect to the corrosion effect of stray currents in the vicinity of the traction substation, as well as in middle points between two stations, are evaluated in [11,12]. The elements underneath the rail are accurately studied in [13,14] from electric and magnetic standpoints, and capacitive and ohmic resistors are measured besides microscopic calculation of the stray current.…”

Section: Introductionmentioning

confidence: 99%

Voltage distribution indices method to analyse the performance of various structures of stray current collectors in direct current transit lines

Juybari

Keypour

Niasati

2021

IET Electrical Syst in Trans

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The stray current produced by a direct current (DC) transit system leads to the corrosion of rails and metallic structures buried under and around the metro line. One practical approach to diminish current injection into buried structures is to implement stray current collectors underneath the rail. An analytical method is proposed herein using voltage distribution indices (VDIs) to calculate the voltage and current collection level of each collector located under the rail soil, and the solutions are validated by comparing with modelling results. The proposed method helps to achieve the voltage of different points under the ground and the current reaching the collectors using a circuit model, without facing the limitations of practical methods, as a supplementary study for experimental tests. Moreover, the effect of different arrangements of collectors under running rails is modelled. The analytical method is deployed considering two objectives, that is stray current collection by the conductors and a reduction in the installation cost of the conductors. Various arrangements of stray current collectors are compared and evaluated. Using integral and matrix equations, current density and potential at different points under the soil are calculated and the obtained results are compared with European (EN) standards.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Introductionmentioning

confidence: 99%