• Title, Summary, Keyword: Integrated three-phase flux-lock type SFCL

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Comparison of Fault Current Limiting Characteristics between the separated Three-phase Flux-lock Type SFCL and the Integrated Three-phase Flux-lock Type SFCL (분리된 삼상 자속구속형 전류제한기와 일체화된 삼상 자속구속형 전류제한기의 전류제한 특성 비교)

  • Doo, Seung-Gyu;Du, Ho-Ik;Kim, Min-Ju;Park, Chung-Ryul;Kim, Yong-Jin;Lee, Dong-Hyeok;Han, Byoung-Sung
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.22 no.8
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    • pp.689-693
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    • 2009
  • We investigate the comparison of fault current characteristics between the separates three-phase flux-lock type superconducting fault current limiter(SFCL) and integrated three-phase flux-lock type superconducting fault current limiter(SFCL). The single-phase flux-lock type SFCL consists of two coils. The primary coil is wound in parallel to the secondary coil on an iron core and superconducting elements are connected to secondary coil in series. Superconducting elements are used by the YBCO coated conductor. The separated three-phase flux-lock type SFCL consists of single-phase flux-phase type SFCL in each phase. But the integrated three-phase flux-lock type SFCL consists of three-phase flux-reactors wound on an iron core. Flux-reactor consists of the same turn's ratio between coil 1 and coil 2 for each single phase. To compare the current limiting characteristics of the separated three-phase flux-lock type SFCL and integrated three-phase flux-lock type SFCL, the short circuit experiments are carried out fault condition such as the single line-to-ground fault. The experimental result shows that fault current limiting characteristic of the separated three-phase flux-lock type SFCL was better than integrated three-phase flux-lock type SFCL. And the integrated three-phase flux-lock type SFCL has an effect on sound phase.

Fault Current Limiting Characteristics of Separated and Integrated Three-Phase Flux-Lock Type SFCLs

  • Lim, Sung-Hun
    • Journal of Electrical Engineering and Technology
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    • v.2 no.3
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    • pp.289-293
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    • 2007
  • The fault current limiting characteristics of the separated and the integrated three-phase flux-lock type superconducting fault current limiters (SFCLs) were analyzed. The three-phase flux-lock type SFCL consisted of three flux-lock reactors and three $high-T_c$ superconducting (HTSC) elements. In the integrated three-phase flux-lock type SFCL, three flux-lock reactors are connected on the same iron core. On the other hand, three flux-lock reactors of the separated three-phase flux-lock type SFCL are connected on three separated iron cores. The integrated three-phase flux-lock type SFCL showed the different fault current limiting characteristics from the separated three-phase flux-lock type SFCL that the fault phase could affect the sound phase, which resulted in quench of the HTSC element in the sound phase. Through the computer simulation applying numerical analysis for its three-phase equivalent circuit, the fault current limiting characteristics of the separated and the integrated three-phase flux-lock type SFCLs according to the ground fault types were compared.

Analysis of Fault Current limiting Characteristics According to Fault Type in Integrated Three-Phase Flux-Lock Type Superconducting Fault Current limiting (사고종류에 따른 삼상 일체화된 자속구속형 SFCL의 사고전류제한특성 분석)

  • Park, Chung-Ryul;Lim, Sung-Hun;Park, Hyoung-Min;Cho, Yong-Sun;Choi, Hyo-Sang;Han, Byoung-Sung
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.54-56
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    • 2005
  • In this paper, we investigated the quench characteristics of HTSC elements in the integrated three-phase flux-lock type SFCL according to fault types such as the single-line-to-ground fault, the double-line-to-ground fault, the line-to-line fault and the three-line-to-ground fault. The integrated three-phase flux-lock type SFCL was the upgrade version of the single-phase flux-lock type SFCL. The structure of the integrated three-phase flux-lock type SFCL consisted of three-phase flux-lock reactor wound on an iron core with the ratio of the same turn between coil 1 and coil 2 in each phase. When the SFCL is operated under the normal condition, the flux generated in the iron core is zero because the flux generated between two coils of each single phase is canceled out. Therefore, the SFCL's impedance is zero, and the SFCL has negligible influence on the power system. However, if a fault occurs in any single-phase among three phases, the flux generated in the iron core is not zero any more. The flux makes HTSC elements of all phases quench irrespective of the fault type, which reduces the current of fault phase as well as the current of sound phase. It was observed that the fault current limiting characteristics of the suggested SFCL were dependent on the quench characteristics of HTSC elements in all three phases.

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Simulation of Operational Characteristics in Integrated Three-Phase Flux-Lock Type SFCL (3상 일체화된 자속구속형 고온초전도 전류제한기의 동작특성 시뮬레이션)

  • Lim, Sung-Hun;Park, Chung-Ryul;Han, Byoung-Sung;Park, Hyoung-Min;Cho, Yong-Sun;Choi, Hyo-Sang
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.167-168
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    • 2005
  • The operational characteristics of the integrated three-phase flux-lock type superconducting fault current limiter (SFCL) were analyzed. The suggested three-phase SFCL consisted of a three-phase flux-lock reactor and three high-Tc superconducting (HTSC) elements. The former has three windings wound on an iron core, each of which has the same turn's ratio between coil 1 and coil 2. The latter are connected in series with coil 2 of each phase. The integrated three-phase flux-lock type SFCL showed the operational characteristics that the fault phase could affect the sound phase, which resulted in quenching the HTSC element in the sound phase. Through the computer simulation applying numerical analysis for its three-phase equivalent circuit, the fault current limiting characteristics of the integrated three-phase flux-lock type SFCL according to the ground fault types were compared.

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Operational Characteristics in Integrated Three-Phase Flux-Lock Type SFCL (3상 일체화된 자속구속형 고온초전도 전류제한기의 동작특성)

  • Lim, Sung-Hun;Han, Tae-Hee;Park, Hyoung-Min;Cho, Yong-Sun;Song, Jae-Joo;Choi, Myoung-Ho;Hwang, Jong-Sun;Choi, Hyo-Sang;Han, Byoung-Sung
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.112-113
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    • 2006
  • The operational characteristics of the integrated three-phase flux-lock type superconducting fault current limiter (SFCL) were analyzed. The suggested three-phase SFCL consisted of a three-phase flux-lock reactor and three high-$T_c$ superconducting (HTSC) elements. The former has three windings wound on an iron core, each of which has the same turn's ratio between coil 1 and coil 2. The latter are connected in series with coil 2 of each phase. The integrated three-phase flux-lock type SFCL showed the operational characteristics that the fault phase could affect the sound phase, which resulted in quenching the HTSC element in the sound phase. Through the computer simulation applying numerical analysis for its three-phase equivalent circuit, the fault current limiting characteristics of the integrated three-phase flux-lock type SFCL according to the ground fault types were compared.

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Analysis of Quench Generation in Fault Types According to Inductance Variation in Integrated Three-Phase Flux-Lock Type Superconducting Fault Current Limiting (삼상일체화된 자속구속형 고온초전도 전류제한기의 인덕턴스 변화에 따른 사고유형별 퀜치발생 분석)

  • Park, Chung-Ryul;Lim, Sung-Hun;Park, Hyoung-Min;Cho, Yong-Sun;Choi, Hyo-Sang;Han, Byoung-Sung
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.165-166
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    • 2005
  • In this paper, we investigated the quench generation of HTSC elements in fault types according to inductance variation in the integrated three-phase flux-lock type SFCL. The integrated three-phase flux-lock type SFCL was the upgrade version of the single-phase flux-lock type SFCL. The structure of the integrated three-phase flux-lock type SFCL consisted of three-phase flux-lock reactor wound on an iron core with the ratio of the same turn between coil 1 and coil 2 in each phase. When the SFCL is operated under the normal condition, the flux generated in the iron core is zero because the flux generated between two coils of each single phase is canceled out. Therefore, the SFCL's impedance is zero, and the SFCL has negligible influence on the power system. However, if a fault occurs in any single-phase among three phases, the flux generated in the iron core is not zero any more. The flux makes HTSC elements of all phases quench irrespective of the fault type, which reduces the current of fault phase as well as the current of sound phase. It was observed that the fault current limiting characteristics of the suggested SFCL were dependent on the quench characteristics of HTSC elements in all three phases.

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Quench Characteristics of HTSC Elements according to fault types in Integrated Three-Phase (삼상일체화된 자속구속형 SFCL의 사고종류에 따른 소자들의 퀜치 특성)

  • Park, Chung-Ryul;Lee, Jong-Hwa;Park, Sig;Du, Ho-Ik;Lim, Sung-Hun;Choi, Hyo-Sang;Han, Byoung-Sung
    • Proceedings of the KIEE Conference
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    • pp.960-962
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    • 2005
  • In this paper, we investigated the quench characteristics of high-Tc superconducting(HTSC) elements in the integrated three-phase flux-lock type superconducting fault current limiter(SFCL) according to fault types such as the single-line-to-ground fault, the double-line-to-ground fault, the line-to-line fault and the triple-line-to-ground fault. The integrated three-phase flux-lock type SFCL is an upgrade version of single-phase flux-lock type SFCL. The structure of the integrated three-phase flux-lock type SFCL consisted of a three-phase flux-lock reactor wound on an iron core with the ratio of the same turn between coil 1 and coil 2 in each phase. When the SFCL is under the normal condition, the flux generated in the iron core is zero because the flux generated between two coils of each single phase is canceled out. Therefore, the SFCL's impedance is zero, and the SFCL has negligible influence on the power system. However, if a fault occurs in any single one of three phases, the flux generated in the iron core is not zero any more. The flux makes HTSC elements of all phases to quench irrespective of the fault type, which reduces the current in fault phase as well as the current of sound phase. It was obtained that the fault current limiting characteristics of the suggested SFCL were dependent on the quench characteristics of HTSC elements in all three phases.

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Quench Characteristics of Three-Phase Flux-Lock type SFCL connected Additive Winding According to Fault Types (가극 결선한 삼상 자속구속형 초전도 한류기의 사고유형별 퀜치 특성)

  • Cho, Yong-Sun;Park, Hyoung-Min;Nam, Gueng-Hyun;Lee, Na-Young;Choi, Hyo-Sang;Park, Chung-Ryul;Lim, Sung-Hun
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.155-156
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    • 2005
  • We investigated the quench characteristics of the flux-lock type superconducting fault current limiter (SFCL) integrated three-phase according to fault types such as the single-line-to-ground fault, the double-line-to-ground fault and the three-line-to-ground. The structure of integrated three-phase flux-lock type SFCL consists of single core which have three-phase flux-lock reactors. The superconducting elements connected sound phase as well as fault phase happened to quenching. Therefore we conformed that the superconducting elements were dependent.

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Analysis of Fault Current Limiting Characteristics According to Variation of Fault Current level in Integrated Three-Phase Flux-Lock Type Superconducting Fault Current Limiting (사고전류 변화에 따른 일체화된 삼상자속구속형 고온초전도 사고전류제한기의 사고전류 제한 특성 분석)

  • Han, Byoung-Sung;Park, Chung-Ryul;Du, Ho-Ik;Choi, Hyo-Sang
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.39-40
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    • 2007
  • The analysis of fault current limiting characteristics according to variation of fault current level in the integrated three-phase flux-lock type superconducting fault current limiter (SFCL), which consisted of three-phase flux-lock reactor wound on an iron core with the same turn's ratio between coil 1 and coil 2 for each single phase, was performed. To analyze the current limiting characteristics of this integrated three-phase flux-lock type SFCL, the short circuit experiments was carried out the various three-phase faults such as the single line-to-ground fault, the double line-to-ground fault, the triple line-to-ground fault. From the experimental results, the fault current limiting characteristic was improved according to increase of fault current level.

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