한국초전도학회:학술대회논문집
- 한국초전도학회 2000년도 High Temperature Superconductivity Vol.X
- /
- Pages.272-275
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- 2000
15 kVA급 저항형 초전도 한류기의 전류제한특성
Characteristics of 15 kVA superconducting fault current limiter
- Choi, Hyo-Sang (Korea Electric Power Research Institute) ;
- Kim, Hye-Rim (Korea Electric Power Research Institute) ;
-
Hwang, Si-Dole
(Korea Electric Power Research Institute)
;
- Kim, Sang-Joon (Korea Electric Power Research Institute) ;
- Lim, Hae-Ryong (Korea Research Institute of Standards and Science) ;
-
Kim, In-Seon
(Korea Research Institute of Standards and Science)
;
- Hyun, Ok-Bae (Korea Electric Power Research Institute)
- 발행 : 2000.08.16
초록
We investigated a resistive superconducting fault current limiter (SFCL) fabricated using YBCO thin films on 2-inch diameter sapphire substrates. Nearly identical SFCL units were prepared and tested. The units were connected in series and parallel to increase the current and voltage ratings. A serial connection of the units showed significantly unbalanced power dissipation between the units. This imbalance was removed by introducing a shunt resistor to the firstly quenched unit. Parallel connection of the units increased the current rating. An SFCL module of 4 units in parallel, each of which has minimum quench current 25 Ap, was produced and successfully tested at a 220 V circuit. From the resistance increase, we estimated that the film temperature increases to 200 K in 5 msec, and 300 K in 120 msec. Successive quenches revealed that this system is stable without degradation in the current limiting capability under such thermal shocks as quenches at 220 V.