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http://dx.doi.org/10.5762/KAIS.2013.14.10.5148

Screening Effects of Double-track Electric Railway and Shielded Cables on Communication-Line Inductive Interference  

Seol, Il-Hwan (Department of Railway Electrical/Signalling Engineering, Seoul National University of Science and Technology)
Choi, Kyu-Hyoung (Department of Railway Electrical/Signalling Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.14, no.10, 2013 , pp. 5148-5155 More about this Journal
Abstract
The induced voltage on the telecommunication cable generated by nearby electric railway system may bring about telecommunication errors and safety accidents. In order to reduce the induced voltage and to achieve communication reliability, the effect of the shield cables and the recent double-track railway systems on the inductive interference should be investigated. This paper analyzes the parameters which seriously influence the induced voltage on the telecommunication cables which run parallel with a AT-fed electric railway line, and provides a simulation-based approach to estimate the amount of the induced voltage. Simulation results indicate that the induced noise voltage generated by a double-track railway decreases by 18 % compared to that generated by a single-track railway, showing the screening effect by nearby track. The induced noise voltages on the 50%-shielded cable and 15%-shielded cable decrease to 1/8 and 1/15 of the induced voltage on the non-shielded cable, respectively. A meaningful shield effect is achieved and the induced voltage is minimized by the double-track railway and the shielded cable.
Keywords
Inductive interference; Electric railway; Telecommunication cable; Shield effect;
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