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Characteristics of the magnetic flux-offset type FCL by switching component
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 Title & Authors
Characteristics of the magnetic flux-offset type FCL by switching component
Jung, Byung-Ik; Choi, Hyo-Sang;
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 Abstract
The study of superconducting fault current limiter (SFCL) is continuously being studied as a countermeasure for reducing fault-current in the power system. When the fault occurred in the power system, the fault-current was limited by the generated impedance of SFCLs. The operational characteristics of the flux-offset type SFCL according to turn ratios between the primary and the secondary winding of a reactor were compared in this study. We connected the secondary core to a superconductor and a SCR switch in series in the suggested structure. The fault current in the primary and the secondary winding of the reactor and the voltage of the superconductor on the secondary were measured and compared. The results showed that the fault current in the load line was the lowest and the voltage applied at both ends of the superconductor was also low when the secondary winding of the reactor had lower turn ratio than the primary. It was confirmed based on these results that the turn ratio of the secondary winding of the reactor must be designed to be lower than that of the primary winding to reduce the burden of the superconductor and to lower the fault current. Also, the suggested structure could increase the duration of the limited current by limiting the continuous current after the first half cycle from the fault with the fault current limiter.
 Keywords
Superconducting fault current limiter (SFCL);flux-offset type FCL;Silicon controlled rectifier (SCR);Turn ratio of a reactor;
 Language
English
 Cited by
1.
Current-Limiting Properties of a Hybrid Superconducting Flux-Offset-Type FCL, Journal of Superconductivity and Novel Magnetism, 2017, 30, 11, 3167  crossref(new windwow)
 References
1.
Hyo Sang Choi, Byung -Ik Jung and Young-Sun Cho, "Transient Characteristics of a Flux-Coupling Type Superconducting Fault Current Limiter According to Winding Direction," IEEE Trans. Appl. Supercond., vol. 19, no. 3, pp. 1827-1830, 2009. crossref(new window)

2.
H. S. Choi, O. B. Hyun, H. R. Kim and K. B. Park, "Switching properties of a hybrid type superconducting fault current limiter using YBCO stripes," IEEE Trans. Appl. Supercond., vol. 12, no. 3, pp. 1833-1838, 2002. crossref(new window)

3.
B. I. Jung, H. S. Choi, Y. S. Cho and D. C. Chung, "Current Limitation and Power Burden of a Flux-Coupling Type SFCL in the Three-Phase Power System According to Turn's Ratio and Fault Type," IEEE Trans. Appl. Supercond., vol. 21, no. 3, pp. 1225-1228, 2011. crossref(new window)

4.
B. I. Jung and H. S. Choi, "Combined Effect of the SFCL and Solenoid Coils," IEEE Trans. Appl. Supercond., vol. 24, no. 3, pp. 5600404, 2014.

5.
Y. S. Cho and H. S. Choi, "The current limiting effects of a matrix-type SFCL according to the variations of designed parameters in the trigger and current-limiting parts," Physica C, vol. 468, pp. 2054-2058, 2008. crossref(new window)