Electrical material data for railway track transmission line parameter studies

Hill, R.; Brillante, S.; Souza, Carlos Roberto de; Leonard, P.J.

doi:10.1049/ip-epa:19990194

Cited by 21 publications

(11 citation statements)

References 3 publications

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“…Hill et al [19] reported some empirical formulas correlating measured values of earth conductivity and permittivity to frequency and moisture content for various soil types; as far as the conductivity is concerned, the following empirical formula is proposed: σ = 0.082w 1.435 f 0.072…”

Section: Surface Layer Soil Resistivitymentioning

confidence: 99%

Ac Corrosion on Pipelines: Influence of the Surface Layer Soil Resistivity in Evaluating the Current Density by a Probabilistic Approach

Lucca¹

2019

PIER M

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The context of the paper is the 50-60 Hz electromagnetic interference between AC power lines/electrified railway lines and pipelines; we present here an algorithm for the evaluation of the AC induced current density, flowing through the holidays (defects) in the pipeline insulating coating, from pipe to soil by modelling this last one as a two-layer structure. Moreover, the value of holidays area is treated as a random variable (as actually is from field experience) so allowing to associate a certain level of probability to the event of exceeding the AC current density limit, established by standards, for AC corrosion risk. The results show that the surface layer soil resistivity is a very significant factor influencing the level of AC induced current density.

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Section: Surface Layer Soil Resistivitymentioning

confidence: 99%

Ac Corrosion on Pipelines: Influence of the Surface Layer Soil Resistivity in Evaluating the Current Density by a Probabilistic Approach

Lucca¹

2019

PIER M

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“…The different mediums that would be of interest for the wave propagation studies are shown in Table 2. The typical values shown in Table 2 are taken from Hill et al [17]; further, they are nominal and do not correspond to some extreme conditions of climate or temperature. The sleepers between the rail and ballast are neglected.…”

Section: Swedish Single-track Railway Systemmentioning

confidence: 99%

A theoretical study on the consequence of a direct lightning strike to electrified railway system in Sweden

Theethayi

Liu

Montaño

et al. 2005

Electric Power Systems Research

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“…In the case of railway tracks, the permeability of a ballast (in dry conditions), for a frequency of 10 kHz, is close to 12 [9]. Since the wavelength is λ = 8660 m for a 10-kHz working frequency, a study of track sections longer than 2 km requires the modeling of the track sections according to the transmission line theory.…”

Section: Introductionmentioning

confidence: 99%

Characterization of railway line impedance based only on short‐circuit measurements

García

Jiménez

Espinosa

et al. 2014

Circuit Theory & Apps

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SUMMARYThis paper presents a new methodology to obtain the line impedance of current railway tracks by using only short-circuit measurements. Open-circuit measurements required by conventional methodologies are discarded, since they cannot be carried out for railway tracks in service (electrically continuous and indefinite length). The mathematical basis of the proposed methodology is based on the transmission line theory but focused on the changes in track length. The proposal has been successfully applied to characterize the impedance of the high-speed railway line at the Spanish AVE Madrid-Valencia (Cuenca) and in the AVE Atocha-Chamartin tunnel (Madrid).

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Electrical material data for railway track transmission line parameter studies

Cited by 21 publications

References 3 publications

Ac Corrosion on Pipelines: Influence of the Surface Layer Soil Resistivity in Evaluating the Current Density by a Probabilistic Approach

Ac Corrosion on Pipelines: Influence of the Surface Layer Soil Resistivity in Evaluating the Current Density by a Probabilistic Approach

A theoretical study on the consequence of a direct lightning strike to electrified railway system in Sweden

Characterization of railway line impedance based only on short‐circuit measurements

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