| Title |
Analysis on SFCL's Impedance for Protective Coordination in Large Transformer installed in Distribution Substation |
| Authors |
김진석(Kim, Jin-Seok) ; 김명후(Kim, Myoung-Hoo) ; 류일경(You, Il-Kyoung) ; 문종필(Moon, Jong-Fil) ; 임성훈(Lim, Sung-Hun) ; 김재철(Kim, Jae-Chul) ; 안재민(Ahn, Jae-Min) |
| Keywords |
Superconducting Fault Current Limiter ; Power System ; Large Transformer ; Protective Coordination |
| Abstract |
The introduction of the large transformer due to the large power demand has increased the fault current in power distribution system. The increased fault current can exceed the cut-off ratings of the circuit breaker. As the methods to solve this problem, the superconducting fault current limiter(SFCL) has been notified. However, the limited fault current by SFCL affects the operational characteristics of the protective device such as overcurrent relay. Therefore, the selection of the proper impedance for the SFCL is required to keep overcurrent relay's protective coordination with the SFCL when a large transformer is introduced into the distribution system. In this paper, the SFCL's impedance for protective coordination was investigates in that a large transformer is introduced. |