DC Railway System Emulator for Stray Current and Touch Voltage Prediction

Ibrahem, Amr; Elrayyah, Ali; Sözer, Yilmaz; Abreu-Garcı́a, J.A. De

doi:10.1109/tia.2016.2606367

Cited by 43 publications

(12 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…30,31 However, by reducing the touch voltage, personal safety can be increased. 32 Moreover, the touch voltage and the stray currents by the means of grounding resistance are inversely proportional to each other. 33 As a result, it is hard to set these values for an optimal grounding.…”

Section: Groundingmentioning

confidence: 99%

“…The corrosion is the main consequence of stray current, and this forces to design a protection scheme with minimum stray current . However, by reducing the touch voltage, personal safety can be increased . Moreover, the touch voltage and the stray currents by the means of grounding resistance are inversely proportional to each other .…”

Section: Challenges Towards the Protection Of Microgridmentioning

confidence: 99%

See 1 more Smart Citation

Distributed generation hybrid AC/DC microgrid protection: A critical review on issues, strategies, and future directions

2020

View full text Add to dashboard Cite

Summary The integration of distributed energy resources (DERs) with conventional systems emerges as an intelligent solution for providing uninterrupted and secure power even at times of high load demand. Better load management with a mature fault handling mechanism makes AC a viable option which has an efficiency of 78.24%. In contrast with less power loss and slightly better efficiency of 84.6%, DC microgrid is a reliable option in a low power environment. In order to accommodate all operating conditions and load types, a hybrid system can be designed with a theoretical efficiency of more than 90%. Bidirectional power flows, low inertia, the transition between different modes of operations are the challenges for the protection of alternating current (AC) and direct current (DC) microgrid systems. Power balance fluctuation, absence of zero‐crossing currents, selection of suitable grounding, and coordination between different rating devices restrict the hybrid system to achieve the said efficiency constantly. This paper reviews in detail of existing protection along with grid‐connected algorithms for both modes of operation. Finally, the limitation, major hurdles, and future course of action for a reliable, efficient, and secure hybrid grid system are figured out.

show abstract

Section: Groundingmentioning

confidence: 99%

Section: Challenges Towards the Protection Of Microgridmentioning

confidence: 99%

Distributed generation hybrid AC/DC microgrid protection: A critical review on issues, strategies, and future directions

2020

View full text Add to dashboard Cite

show abstract

“…Stray current also has adverse effects on the surrounding power grid, such as transformer DC bias, increased operating noise, and so on [11,12]. Additionally, excessive stray current is prone to generate ground voltage, and it will be a threat to personal safety in severe cases [13,14].…”

Section: Introductionmentioning

confidence: 99%

A New On‐line Monitoring Method for Stray Current ofDCMetro System

Peng

Zhang

Leng

et al. 2020

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

In order to solve the problem that the metro stray current cannot be directly numerically measured by the existing methods, and the data acquisition distortion caused by the special operating environment of the metro system, a new on‐line monitoring method for stray current was put forward in this paper. First, the stray current distribution function at different positions of metro trains was derived. Then, the equivalent circuit of stray current was built according to the field measured environment, and the numerical calculation formula of stray current was deduced. On the basis of the formula, the metro stray current could be calculated by the real‐time monitoring data, and the calculated data can be filtered and fitted with the stray current distribution function. In order to identify the distorted data, the potential energy function was introduced to judge the deviation degree of data point from the fitting function, so the erroneous data can be effectively eliminated. Thus, the accurate distribution value of stray current along the metro track was obtained. Taking a metro station in a certain city as the prototype, the CDEGS simulation model was built to verify the proposed method. The simulation results showed that even under the condition of sampling data distortion, the method could directly calculate the stray current value in real time, which had strong fault tolerance. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

show abstract

“…As example of modelling and simulation in railway applications, modelling of short-circuit protections or DC electrical railway systems to simulate stray currents and touch voltages, has been already developed in [5,6].…”

Section: Introductionmentioning

confidence: 99%

Modelling and Simulation of Tramway Transportation Systems

Capasso

Ceraolo

Lamedica

et al. 2019

Journal of Advanced Transportation

View full text Add to dashboard Cite

Electrified guided vehicles typically face routes having a large number of acceleration and braking phases. The braking energy, since the feeding line presents nonreversible electrical feeding substations, can be recovered in the presence of other nearby vehicles. To improve braking energy recovery, one or more storage systems can be positioned along the track. Analysis of effectiveness for the considered solution requires time-domain simulation models, to be created through suitable simulation general-purpose languages or specialised languages/software. In this paper, three different tools for the considered existing tramway were developed, and the main examined characteristics have been compared to each other. Then, analysis of output results was also performed, demonstrating the real cost-effectiveness of introducing one storage device on the considered tramline in operation.

show abstract

DC Railway System Emulator for Stray Current and Touch Voltage Prediction

Cited by 43 publications

References 10 publications

Distributed generation hybrid AC/DC microgrid protection: A critical review on issues, strategies, and future directions

Distributed generation hybrid AC/DC microgrid protection: A critical review on issues, strategies, and future directions

A New On‐line Monitoring Method for Stray Current ofDCMetro System

Modelling and Simulation of Tramway Transportation Systems

Contact Info

Product

Resources

About