Measurement and Analysis of Stray Currents

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

doi:10.1109/epe.2019.8778072

Cited by 9 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to safety standards, stray voltages above 10 V must be handled by authorities [ 32 ]. This value is close to the highest voltage measured in site conditions, which can reach 10 V [ 33 , 34 , 35 ]. In the current study, 9 V was chosen, which is equal to 10% of the maximum hazardous voltage and close to the 10 V measured in site conditions and specified by [ 34 ].…”

Section: Experimental Programsupporting

confidence: 80%

Degradation of RC Columns under Combined Exposure to Axial Loading, Stray Currents, and Chloride Ingress

Lapiro,

Eid,

Kovler

2024

Materials

View full text Add to dashboard Cite

Coastal regions, home to a significant portion of the world’s population, confront a formidable challenge: the corrosive impact of chloride-rich environments on vital infrastructure. These areas often host essential transportation systems, such as trains and metros, reliant on pre-existing electrical infrastructure. Unfortunately, complete isolation of this infrastructure is rarely feasible, resulting in the emergence of stray currents and electrical potentials that expedite corrosion processes. When coupled with conducive mediums facilitating chemical electrocell formation, the corrosion of reinforced concrete elements accelerates significantly. To combat this issue, international standards have been established, primarily focusing on augmenting the thickness of reinforcement bar covers and restricting stray voltage between rails and the ground. Nevertheless, these measures only provide partial solutions. When subjected to service loads, these elements develop cracks, especially when exposed to stray currents and chlorides, dramatically increasing corrosion rates. Corrosion products, which expand in volume compared to steel, exert internal forces that widen cracks, hastening the deterioration of structural elements. The study deals with the degradation of reinforced concrete columns under the combined action of loads, chloride-rich environments, and electrical voltage-simulating stray currents. In these conditions, degradation and reduction of load-bearing capacity accelerate compared to unloaded conditions, significantly amplifying the corrosion rate. Astonishingly, even in the absence of mechanical loads, stray currents alone induce tensile stresses in elements due to corrosion product formation, leading to longitudinal cracks parallel to the reinforcement bars.

show abstract

Section: Experimental Programsupporting

confidence: 80%

Degradation of RC Columns under Combined Exposure to Axial Loading, Stray Currents, and Chloride Ingress

Lapiro,

Eid,

Kovler

2024

Materials

View full text Add to dashboard Cite

show abstract

“…Specific soil resistance is a basic parameter at determination of corrosive aggressiveness. The calculation of the resulting specific soil resistance can be performed using the following equation (Siranec et al, 2019), Eq. ( 4):…”

Section: Rail-to-earth Potential Measurement Usingmentioning

confidence: 99%

“…Stray current represents current that is flowing into the ground from insufficient isolated conductor resulting with the stray current corrosion (Siranec et al, 2019). Stray current leaks through the path of the smallest resistance and it can originate from different sources.…”

Section: Introductionmentioning

confidence: 99%

“…Stray current can be static and dynamic. Sources of static stray current are offshore structures, marine platforms, cathodic protection systems, and the main source of dynamic current is electrical traction system (Siranec et al, 2019). Unlike industrial platforms that produce stray current with a relatively stable intensity in time, stray currents produced by electrical tractions are fluctuating in intensity and duration.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic Stray Current Measuring Methods in Urban Areas

Vranešić

Serdar

Lakušić

et al. 2022

BJRBE

View full text Add to dashboard Cite

In areas where urban tracks are used as public transportation, dynamic stray currents cause high maintenance costs for the tracks and metal structures near the tracks. S tray currents caused by rail vehicles depend on many factors (traffic density, vehicle speed, acceleration and deceleration, soil and track moisture), so it is very difficult to get a clear picture of the harmfulness of the stray current based on the results of a single field measurement. However, there are several measurement methods that can be used to determine the presence of stray currents and predict appropriate track maintenance actions. Some of these methods are described in this article, namely the use of stray current mapper, measurement of rail potential and rail current, measurement at the stray current collection system, and the use of non-destructive sensors. In track construction, measuring the electrical potential between rail and ground is one of the most common methods of detecting the damaging influence of stray current.

show abstract

“…Various methods have already been used for stray current modelling in railway transit systems. In most of the literature and simulations, such as in [1,2], the metro system is presented as resistive grids and the mathematical equations are given based on the traction substation current, rail track resistance, the distance between the train and substation, the resistance between the rail and earth, and stray current. In [3,4], the rail voltage and current are evaluated under different speeds and accelerations and the performance of rail potential control devices for controlling rail voltage is assessed.…”

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

View full text Add to dashboard Cite

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.

show abstract

Measurement and Analysis of Stray Currents

Cited by 9 publications

References 12 publications

Degradation of RC Columns under Combined Exposure to Axial Loading, Stray Currents, and Chloride Ingress

Degradation of RC Columns under Combined Exposure to Axial Loading, Stray Currents, and Chloride Ingress

Dynamic Stray Current Measuring Methods in Urban Areas

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

Contact Info

Product

Resources

About