NDLI: Calculation of remote effects of stray currents on rail voltages in DC railways systems

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Calculation of remote effects of stray currents on rail voltages in DC railways systems

Content Provider	IET Digital Library
Author	Rodríguez, Jorge Valero Feito, Javier Sanz
Abstract	This study focuses on the analysis of the remote effects of stray currents and rail potentials along the rail line in DC traction systems, although the results can be extrapolated to AC systems. This study is essential to ensure the equipment and passenger safety, as well as the maintenance of rail infrastructures, subjected to corrosion in DC railway traction systems. The mathematical model developed in this study allows to obtain stray current and rail voltage distributions at the point where the train or the short circuit is located, x, and what is more important, it lets also to calculate its remote effects at any other point along the rail, y. Most of the railway electric models published in the literature do not calculate the remote effects of stray currents and rail potentials. Calculations are often done just at the specific point where the current is injected into the rail. However, the train and short-circuit currents actually generate remote effects as a voltage wave-front that propagates along the rails. Another contribution of this article is that the problem is defined as a function of the power demanded by the vehicle at each point, P(x), so the consumed current, I(x), is obtained by means of a power flow algorithm. Nevertheless the vast majority of references assume an already known input current, which, may only be obtained by power flow methods. With the aim of simplifying the lecture of this document, Table 1 provides the list of symbols used in this study.
Starting Page	31
Ending Page	40
Page Count	10
ISSN	20429738
Volume Number	3
e-ISSN	20429746
Issue Number	Issue 2, Jun (2013)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-est/3/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-est.2012.0022
Journal	IET Electrical Systems in Transportation
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC System Current Consumption DC Railway Traction System Mathematical Model Passenger Safety Power Flow Algorithm Rail Infrastructure Maintenance Rail Line Rail Potential Rail Voltage Rail Voltage Distribution Railway Electric Model Railway Electrification Short-circuit Current Stray Current Remote Effect Traction Transportation Voltage Wave-front
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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