Uncertainty of Standardized Track Insulation Measurement Methods for Stray Current Assessment

Bhagat, Sahil; Bongiorno, Jacopo; Mariscotti, Andrea

doi:10.3390/s23135900

Cited by 4 publications

(2 citation statements)

References 37 publications

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“…There are instead more direct methods to evaluate track insulation, as described in the EN 50122-2 [34], which have been discussed in [8,79,80] and critically reviewed recently in [35]. In synthesis,there are three methods for track insulation determination: voltamperometric measurement on electrically sectioned track sections, similar measurement on electrically continuous tracks estimating and correcting for the rail current leaving the measured section, and lateral electric field measurement (as an estimate of stray current flowing in the soil).…”

Section: Monitoring and Maintenance During Track Lifetimementioning

confidence: 99%

“…In the EN 50122-2, it is stated that experience has proven that there is no damage in the tracks over a period of 25 years if the average stray current per length does not exceed 2.5 mA/m of a single track line. According to this standard, if the following values of rail-to-ground conductance per length G tg are not exceeded during system's lifetime, it is not necessary to conduct further investigations: where ∆U tg indicates the track potential, having subtracted the off potential (usually negligible, as discussed in [35]).…”

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confidence: 99%

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Measures and Prescriptions to Reduce Stray Current in the Design of New Track Corridors

Vranešić,

Bhagat,

Mariscotti

et al. 2023

Energies

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Stray currents can cause very rapid degradation and material loss at the points where the current leaves the metal and enters the electrolyte. Nowadays, many resources are invested in the protection of jeopardized structures, such as buried pipelines, from stray current corrosion. This paper describes the measures that need to be considered in the design and construction of track structures to ensure high rail-to-ground resistance and consequently reduce stray currents. The main conclusions from existing guidelines and standards for reducing and controlling stray currents that are applied by various track operators are presented in the paper. Rail-to-ground resistance in different types of tracks structures and rail fastening systems is analyzed, and the optimal type of the track and type of the fastening system is defined. The grounding schemes used on the tracks and their influence on stray current values are described, as well as the influence of traction power stations (TPS) and rail cross bonding on stray current. Since it is not necessary to apply all the measures described to the same track structure, the paper gives recommendations on which measures to apply when building tracks with continuously fastened rails and which to apply when building tracks with discretely supported and fastened rails.

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Section: Monitoring and Maintenance During Track Lifetimementioning

confidence: 99%

mentioning

confidence: 99%

Measures and Prescriptions to Reduce Stray Current in the Design of New Track Corridors

Vranešić,

Bhagat,

Mariscotti

et al. 2023

Energies

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Dynamic Distribution of Rail Potential with Regional Insulation Alteration in Multi‐Train Urban Rail Transit

Kang,

Du,

Xia

et al. 2024

IET Electrical Systems in Transportation

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Rail potential (RP) has become a disaster for the safe operation of metro lines. In urban rail transit (URT), regional insulation degradation often occurs due to the harsh environment of the reflux conductor for traction current, leading to the complex distribution of RP. In this paper, the dynamic distribution of RP with regional insulation alteration in URT is studied. First, the distribution model of the reflux system with regional insulation alteration is established. Second, utilizing the distributed parameter element method and taking into account the constraint conditions of the concentrated parameters, a superposition calculation method of RP in the reflux system is proposed. Finally, using Guangzhou Metro as an example, the simulation of different insulation states in long and local areas of URT is carried out. Results show that the RP amplitude decreases while the stray current amplitude increases when the insulation is degraded. At the same time, when the insulation in the local area degrades, the RP at the far end increases.

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Measures and Prescriptions to Reduce Stray Current in the Design of New Track Corridors

Vranešić¹,

Bhagat²,

Mariscotti³

et al. 2023

Preprint

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Stray currents can cause very rapid degradation and material loss at the points where the current leaves the metal and enters the electrolyte. Nowadays, many resources are invested in the protection of jeopardized structures, such as buried pipelines, from stray current corrosion. This paper describes the measures that need to be considered in the design and construction of track structures to ensure high rail-to-ground resistance and consequently reduce stray currents. The main conclusions from existing guidelines and standards for reducing and controlling stray currents that are applied by various track operators are presented in the paper. Rail-to-ground resistance in different types of tracks structures and rail fastening systems is analysed and optimal type of the track and type of the fastening system is defined. The grounding schemes used on the tracks and their influence on stray current values are described, as well as the influence of traction power substation and rail cross bonding on stray current. Since it is not necessary to apply all the measures described to the same track structure, the paper gives recommendations on which measures to apply when building tracks with continuously fastened rails and which to apply when building tracks with discretely supported and fastened rails.

show abstract

Uncertainty of Standardized Track Insulation Measurement Methods for Stray Current Assessment

Cited by 4 publications

References 37 publications

Measures and Prescriptions to Reduce Stray Current in the Design of New Track Corridors

Measures and Prescriptions to Reduce Stray Current in the Design of New Track Corridors

Dynamic Distribution of Rail Potential with Regional Insulation Alteration in Multi‐Train Urban Rail Transit

Measures and Prescriptions to Reduce Stray Current in the Design of New Track Corridors

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