| Title |
Fault Current Limiting and Hysteresys Characteristics of a SFCL using Magnetic Coupling of Two Coils on the Iron Core with an Air-Gap |
| Authors |
Sung-Hun Lim ; Jae-Chul Kim |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2011.25.2.137 |
| Keywords |
Hysteresys Characteristics ; Superconducting Fault Current Limiter(SFCL) ; Air-Gap ; Saturation ; Current Limiting Characteristics |
| Abstract |
In this paper, the fault current limiting and the hysteresys characteristics of a superconducting fault current limiter (SFCL) using magnetic coupling of two coils on the iron core with an air-gap were analyzed. The introduction of the air-gap in the SFCL with magnetically coupled two coils can suppress the saturation of the iron-core and, on the other hand, make the limiting impedance of the SFCL decreased, which results from the increase of the exciting current. To analyze the effect of the aig-gap on the fault current limiting characteristics of the SFCL, the hysteresys curves of the iron core comprising the SFCL were derived from the short-circuit experiment and the variation in the voltage-current trace of the SFCL during the fault period was analyzed. Through the comparison with the current limiting characteristics of the SFCL without air-gap, the air-gap could be confirmed to contribute to the suppression of the iron core"s saturation through the increase of the SFCL"s burden from the short-circuit current. |