| Title |
An Analysis on Rise of Rail Potential And A Study on Control Method for It in DC Feeding System |
| Authors |
민명환(Min, Myung-Hwan) ; 정호성(Jung, Ho-Sung) ; 박영(Park, Young) ; 김형철(Kim, Hyeng-Chul) ; 신명철(Shin, Myong-Chul) |
| DOI |
https://doi.org/10.5370/KIEE.2011.60.3.680 |
| Keywords |
DC feeding system ; Rail potential ; Stray current ; Leakage current |
| Abstract |
Nowadays, in metropolitan railroad, DC feeding system is being generally applied. In order to reduce damages of electro-chemical corrosion caused by stray current and leakage current, in DC feeding system, rail is used as negative-polarity return conductor for traction load current. However, it has problem of rail potential increase and there are no adequate measures to prevent it in domestic. In this paper, we presented fundamental theory and related standards about rail potential increase. And then, we analyzed field testing data and simulated a variety of operations by using PSCAD/EMTDC as an analysis program of power system. In addition, voltage control device is suggested to prevent accidents caused by rail potential increase. |