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Analysis on the Application of Railway Screening Effect in the Multi-conductor Line Solution of Induced Voltage to Telecommunication Lines by Electrified Traction System  

Lee, Sang-Mu (한국전자통신연구원 표준연구센터 기술기준연구팀)
Choi, Mun-Hwan (한국전자통신연구원 표준연구센터 기술기준연구팀)
Cho, Pyoung-Dong (한국전자통신연구원 표준연구센터 기술기준연구팀)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.7B, 2008 , pp. 601-607 More about this Journal
Abstract
The induced voltages by AT power feeding system of electrified traction line to telecommunication line are calculated with the method of multi-conductor line solution in the CCITT Directives. There is a screening effect by railway line itself among various shielding factors against induction. It is the argue point whether the multi-conductor line solution contains the railway line effect since the calculation method does not show any expression about shielding factors. So this paper illuminates the mysterious question by reviewing the shielding factor principle on traction system, scrutinizing the Japanese bible about induction, analyzing the multi-conductor line solution itself, and comparing the result calculation considering the effect of railway screen. This paper concludes that multi-conductor line solution contains the screening effect of railway lines.
Keywords
Rail screening factor; Induction; Traction system; Multi-conductor line solution;
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