[논문]재폐로 동작시 1선 지락사고에 따른 고속도 초전도 한류기의 특성 분석

정인성; 정병익; 최효상

doi:10.5370/kiee.2015.64.4.612

Abstract ▼ AI-Helper

This paper proposed an high-speed superconducting fault current limiter (H-SFCL). The proposed H-SFCL functioned the initial fault current could be covered by the SFCL and the continued fault current after the one-cycle from fault occurrence could be controlled current-limiting-element of the normal...

This paper proposed an high-speed superconducting fault current limiter (H-SFCL). The proposed H-SFCL functioned the initial fault current could be covered by the SFCL and the continued fault current after the one-cycle from fault occurrence could be controlled current-limiting-element of the normal conduction. To investigate the operation characteristics of the H-SFCL, a simulation power system was constructed, and a single line-to-ground fault was occurred. As a result, the H-SFCL limited the fault current by more than about 70%, and it was confirmed that the electric power burden was reduced compared to the SFCL that consisted only of superconductors.

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제안 방법

The value of the increased fault current threatens the protection capacity of the existing protective equipment. To address such problem, this paper proposed an SFCL using the zero resistance characteristics of superconductors. The SFCL supplies power without any loss while maintaining the superconducting state during normal state.
However, as the superconductor is expensive, it is important to minimize the power burden of superconductor by its use. Therefore, this paper proposed an High-speed Superconducting Fault Current Limiter (H-SFCL) that combines the superconductor with the High-Speed Current Limiter(H-FCL).
It was confirmed that the line had a steady-state current flow after power is applied, but the current of the power line was approximately 42A after the occurrence of a fault. The SFCL connected to the fault line quenched due to the increased fault current, and the CT and interrupter control system detected and determined the fault current and applied a signal to the high-speed interrupter. The quenched SFCL limited the value of the initial fault current to 42.
In this paper, the H-SFCL was designed so that the SFCL can share the fault power burden for a short time at the beginning of the fault and the normal-conduction current-limiting part can take the remaining burden of the continuous fault current in order to minimize the burdens to the SFCL. Fig.

성능/효과

It recovers its superconductivity when the high-speed interrupter conducts switching operations; the fault current detours to the line connected to the normal-conduction current-limiting part, and is finally limited. Result of experiment, the H-SFCL stably limited the fault currents in all the three consecutive fault experiments, and the electric power burdens to the SFCL were reduced to a certain extent compared to the conventional structure as it covered the power burden for only a cycle of the fault occurrence. Based on the analysis results of this study, the application of the SFCL to the HFCL will likely stably limit the fault current, reduce the burdens to the SFCL, and extend its lifespan.
Result of experiment, the H-SFCL stably limited the fault currents in all the three consecutive fault experiments, and the electric power burdens to the SFCL were reduced to a certain extent compared to the conventional structure as it covered the power burden for only a cycle of the fault occurrence. Based on the analysis results of this study, the application of the SFCL to the HFCL will likely stably limit the fault current, reduce the burdens to the SFCL, and extend its lifespan.

참고문헌 (7)

H. S. Choi, O. B. Hyun, and H. R. Kim, “Quench characteristics of resistive superconducting fault current limiters based on YBCO films,” Physica C, vol. 351, pp. 415-420, 2001.

상세보기
H. S. Choi, O. B. Hyun, H. R. Kim, K. B. Park, “Switching properties of hybrid type superconducting fault current limiter using YBCO stripes” IEEE Trans, Appl. Superconduct, vol. 12, pp. 1833-1838, 2002.

상세보기
B. I. Jung, H. S. Choi, “Combined Effect of the SFCL and Solenoid Coils” IEEE Trans, Appl. Superconduct, vol. 24, pp. 5600404, 2014.
H. W. Choi, H. S. Choi, B. I. Jung, “Operating characteristics according to the application position of a superconducting fault current element integrated into a transformer” Physica C, vol. 494. pp. 344-348, 2013.

상세보기
M. Noe, K. P. Juengst, F. N. Werfel, S. Elschner, J. Bock, F. Breuer, R. Kreutz, “Testing bulk HTS modules for resistive superconducting fault current limiters,” IEEE Trans. Appl. Supercond., vol. 13, pp. 1976-1979, 2003.

상세보기
O. B. Hyun, J. W. Sim, H. R. Kim, K. B. Park, S. W. Yim, I. S. Oh, “Reliability Enhancement of the Fast Switch in a Hybrid Superconducting Fault Current Limiter by Using Power Electronic Switches,” IEEE Trans. Appl. Supercond., vol. 19, no. 3, pp. 1843-1846, 2009.

상세보기
B. W. Lee, K. B. Park, J. Sim, I. S. Oh, H. G. Lee, H. R. Kim, O. B. Hyun, “Design and Experiments of Novel Hybrid Type Superconducting Fault Current Limiters,” IEEE Trans. Appl. Supercond., vol. 18, no. 2, pp. 624-627, 2008.

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Analysis of Characteristics on the High-speed SFCL According to Single Line-ground-fault in the Reclosing Operation 원문보기

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Analysis of Characteristics on the High-speed SFCL According to Single Line-ground-fault in the Reclosing Operation 원문보기

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