| Title |
A Study on DC Interruption Technology using a Transformer Type Superconducting Fault Current Limiter to Improve DC Grid Stability |
| Authors |
황선호(Seon-Ho Hwang) ; 최혜원(Hye-won Choi) ; 정인성(In-Sung Jeong) ; 최효상(Hyo-Sang Choi) |
| DOI |
http://doi.org/10.5370/KIEE.2018.67.4.595 |
| Keywords |
Direct Current Grid(DC Grid) ; Direct Current Circuit Breaker(DCCB) ; Inductor ; Superconductivity ; Superconductor Fault Current Limiter(SFCL). |
| Abstract |
Interruption system with the transformer type superconducting fault current limiter(TSFCL) is proposed in this paper. The interruption system with a TSFCL is a technology that it maximizes the interruption function of a mechanical DC circuit breaker using a transformer and a superconducting fault current limiter. By a TSFCL, the system limits the fault current till the breakable current range in the fault state. Therefore, the fault current could be cut off by a mechanical DC circuit breaker. The Interruption system with a TSFCL were designed using PSCAD/EMTDC. In addition, the Interruption system with a TSFCL was applied to the DC test circuit to analyze characteristics of a current-limiting and a interruption operation. The simulation results showed that the Interruption system with a TSFCL interrupted the fault current in a stable when a fault occurred. Also, The current-limiting rate of the Interruption system with a TSFCL was approximately 69.55%, and the interruption time was less than 8 ms. |