| Title |
Analysis on the Short Circuit Current of a Low Voltage Direct Current(DC) Distribution System using PSCAD/EMTDC |
| Authors |
안재민(Ahn, Jae-Min) ; 전정채(Jeon, Jeong-Chay) ; 임용배(Lim, Young-Bae) ; 배석명(Bae, Seok-Myeong) ; 변길성(Byeon, Gil-Sung) ; 이경호(Lee, Kyoung-Ho) |
| Keywords |
Short Circuit Currents ; Low Voltage DC Distribution System ; PSCAD/EMTDC |
| Abstract |
In this paper, we analyzed the short circuit current of a low voltage direct current distribution system. For the analysis, we performed the modeling of the low voltage direct current distribution system with a 6-pulse three-phase thyristor rectifier using the PSCAD/EMTDC, surveyed impedance of sources, transformers and distribution lines to run a simulation. A result of the simulation is that short circuit currents of the direct current distribution system with the rectifier decreased due to a thyristor-ON-resistance(Ron). But in case of the low thyristor-ON resistance, output fault current of the rectifier increased over three-phase short circuit current of an AC power system without a rectifier by regular ratio of the rectifier. Because the output fault current of the rectifier can increase over interrupting the capacity of circuit breakers, studying short circuit currents of a low voltage direct current distribution system with a rectifier is necessary for introducing the direct current distribution systems. |