| Title |
Integrated Protection Method for DC Railway Systems |
| Authors |
강상희(Kang, Sang-Hee) ; 최창영(Choi, Chang-Young) ; 이원석(Lee, Won-Seok) ; 정호성(Jung, Ho-Sung) |
| DOI |
https://doi.org/10.5370/KIEE.2011.60.2.285 |
| Keywords |
DC railway system ; Potential Relay(64P) ; Rail potential ; Selective ground fault protection |
| Abstract |
DC traction power system is operated ungrounded so that minimize the stray current. Because the stray current is still present, a rail potential is increased. The ground faults in the DC railway systems are usually detected by a potential relay(64P). Moreover, if the rail potential goes high in the ordinary operating state because of the traction load, the potential relay would be maloperated. A presented protective relaying algorithm that can identify exactly the faulted region and can distinguish a ground fault from the potential rising of the rail is presented in this paper. This paper presents simulation technique that is very similar to the real operation situation using PSCAD/EMTDC. |