Estimation of current distribution in the electric railway system in the EMTP-RV

Milešević, Boško; Filipović-Grčić, Božidar; Uglešić, Ivo; Jurišić, Bruno

doi:10.1016/j.epsr.2018.05.004

Cited by 13 publications

(11 citation statements)

References 3 publications

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“…There are many approaches for the calculation of stray currents in railway traction, depending on the type of section, load, and other In this case, according to Kirchhoff's first law, the currents in sections ab, bc, cd, and de of the catenary (i.e., equivalent contact wire) will be equal to I c1 = 835.6 A, I c2 = 626.7 A, I c3 = 417.8 A, and I c4 = 208.9 A. At the same time, according to different publications [33][34][35][36], the proportion of currents flowing in the track circuits of the AC electric traction system could vary in a very wide range up to 50-60% of the current in the catenary. The nature of stray (earth) return current transmission in itself is a complicated enough topic because of different factors.…”

Section: Conditions For Numerical Calculations Of Power Lossesmentioning

confidence: 99%

Electrodynamics of Power Losses in the Devices of Inter-Substation Zones of AC Electric Traction Systems

et al. 2022

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This article presents a new method for the estimation of active power losses based on a “field” approach, i.e., on the theory of the electromagnetic field and the theory of propagation of electromagnetic waves in a dielectric medium. Electromagnetic waves are assumed to transmit energy from the traction substation to electric rolling stock through the airspace of the inter-substation zone (i.e., not through the wires of the traction network) and meet electrically conductive surfaces on their way. The waves are partially reflected from the surfaces and partially penetrate them, thus creating thermal losses, the determination of which is the main task of this article. The analytical expressions for specific losses of active power are obtained by solving the system of Maxwell’s equations. Calculations of specific power losses in the catenary, rails, roofs, and bottoms of carriages and electric locomotives are performed. Power losses in carriages and electric locomotives are found to be at least 7%. A comparative assessment of the magnitude of total power losses of different types obtained by the “field” and “circuit” approaches is provided, which has established that “conditional” losses correspond to losses in rails, train carriages, and electric locomotives.

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Section: Conditions For Numerical Calculations Of Power Lossesmentioning

confidence: 99%

Electrodynamics of Power Losses in the Devices of Inter-Substation Zones of AC Electric Traction Systems

et al. 2022

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“…However, overvoltage and overcurrent protections are not considered. Another work proposes a EMTP model to determine the current distribution in the different wires of the overhead feeding system as well as the rails [110]. This current distribution affects to the couplings with the surrounding metallic structures.…”

Section: B Specific Cases Of Use Of Simulation Tools and Modelsmentioning

confidence: 99%

A review of railway feeding infrastructures: Mathematical models for planning and operation

et al. 2020

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In this paper, the authors review the mathematical models, simulation and analysis techniques and energy management systems proposed for railway power supply systems. The authors review both AC and DC railway feeding systems making special emphasis in those that consider new technologies like on-board or wayside energy storage, integration of renewable energies in the traction networks or the use of power electronic devices to increase the efficiency and controllability of the networks. The paper is divided in two main blocks studying DC and AC systems. In both parts, a review of the main simulation tools and models is presented but also a detailed list of specific cases of use of such techniques.

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“…The calculations are based on model shown in Fig. 2 and performed in electromagnetic transient program [12], [13].…”

Section: Contact Linementioning

confidence: 99%

Inductive influence of 25 kV, 50 Hz electrified single rail traction system

Milešević

Uglešić

2018

MATEC Web of Conferences

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The paper presents the methodology for calculation and measurement of induced voltage caused by railway system operation on the sensitive metallic structures. The arrangement and characteristics of railway system 25 kV, 50 Hz are provided. The procedures of short-circuit current calculation and supply current measurement in the railway system are described. The basic theoretic background of inductive interference is explained. The reduction factors of the communication cable, railway system and environment are mentioned and clarified. On a case study, the results of the induced voltage calculation and measurement is compared. It is proved that induced voltage directly depends of supply current or shortcircuit value.

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Estimation of current distribution in the electric railway system in the EMTP-RV

Cited by 13 publications

References 3 publications

Electrodynamics of Power Losses in the Devices of Inter-Substation Zones of AC Electric Traction Systems

Electrodynamics of Power Losses in the Devices of Inter-Substation Zones of AC Electric Traction Systems

A review of railway feeding infrastructures: Mathematical models for planning and operation

Inductive influence of 25 kV, 50 Hz electrified single rail traction system

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