| Title |
Study on Improvement of Overcurernt Relay (OCR)'s Operation Due to Application of Superconducting Fault Current Limiter (SFCL) in Power Distribution System with a Dispersed Generation |
| Authors |
임승택(Lim, Seung-Taek) ; 임성훈(Lim, Sung-Hun) |
| DOI |
https://doi.org/10.5370/KIEE.2017.66.2.300 |
| Keywords |
Dispersed generation (DG) ; Power distribution system ; Superconducting fault current limiter (SFCL) ; Overcurrent relay (OCR) |
| Abstract |
Due to the introduction of various types of dispersed generations (DGs) with larger capacity in a power distribution system, the short-circuit current is expected to be increased, which more requires for the effective fault current limiting methods. As one of the promising countermeasures, the superconducting fault current limiter (SFCL) has been noticed. However, the decreased fault current by SFCL affects the operation of the overcurrent relay (OCR), representative protective device in a power distribution system. In this paper, the operation of the overcurrent relay due to the application of a SFCL in a power distribution system with DG linked by its bus line was analysed through the short-circuit tests. To analyze the effect of the SFCL application in a power distribution system with DG, the experimental simulated circuits were designed and the short-circuit tests for the power distributed system assembled with the DG, the OCR and the SFCL were carried out. Through the analysis on the short-circuit tests, the application of the SFCL in a power distribution system with DG could be confirmed to be contributed to the operational improvement of overcurrent relay. |