• Title/Summary/Keyword: fault current limiting characteristic

Search Result 44, Processing Time 0.027 seconds

The Study on the Current Limiting Characteristics of YBCO Coated Conductor with Different kinds of Stabilization Layer Applied to SFCL Using Iron Core and Coil (철심과 권선을 이용한 전류제한기에 적용시킨 안정화층이 다른 YBCO Coated Conductor의 전류제한 특성에 관한 연구)

  • Lee, Dong-Heok;Du, Ho-Ik;Kim, Yong-Jin;Han, Byoung-Sung;Yim, Seong-Woo;Han, Sang-Chul;Lee, Jeong-Phil
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.23 no.10
    • /
    • pp.788-792
    • /
    • 2010
  • The yttrium-barium-copper-oxide (YBCO) coated conductor, which supplement the fault of the existing superconducting current-limit materials YBCO thin film, bismuth-strontium-calcium-copper-oxide(BSCCO) wire and bulk, has been improved its mechanical weakness and has high index; hence, after quench YBCO coated conductor could limit the fault current effectively because of fast resistance occurrence speed. Furthermore, it has wide applicable area as an current limit material because it shows different resistance occurrence tendency by the thickness and kind of stabilization material sputtered on the superconducting layer. Therefore, many researchers are carrying out the study of application of YBCO coated conductor to superconducting fault current limiter (SFCL) for making high quality current limit element, based on resistance type. On the other hand, the study for other type except resistance type has been rarely conducted for the application of YBCO coated conductor to SFCL as an current limit element. Consequently, in this study, YBCO coated conductor with different stabilization layer Cu and Stainless steel, is applied to SFCL using iron core and coil, and examine the many index points as an current limit element, such as current limit characteristic, the tendency of resistance occurrence, response time, the temperature trend for stability.

An Analysis on the Current Limiting Characteristic of Superconducting Fault Current limiter with Bypass Reactor (보조 선로리액터를 구비한 초전도 한류기의 한류 특성 해석)

  • Chang, Ki-Sung;Jang, Jae-Young;Kim, Young-Jae;Park, Dong-Keun;Ko, Tae-Kuk
    • Proceedings of the KIEE Conference
    • /
    • 2009.07a
    • /
    • pp.832_833
    • /
    • 2009
  • 본 연구는 과거에 개발 되었었던 보조 선로 리액터를 구비한 초전도 한류기에 대한 것이다. 과거의 연구에서는 BSCCO선재와 YBCO coated condcutor (YBCO CC) 선재를 사용하여 실험적으로 한류특성에 대하서 연구 하였다 [1]. BSCCO 선재는 유도형으로 권선되어 정상 시에 저항은 작지만 인덕턴스 성분이 존재하는 보조 선로 리액터의 역할을 수행하였고 YBCO CC 선재는 무유도형으로 권선되어 스위치의 역할을 수행하였다. 두 개의 권선은 병렬로 연결되어 정상 시에는 전류가 YBCO CC 선재로 통전되다가 사고가 발생하면 YBCO CC 선재의 저항으로 인해서 BSCCO 선재로 통전되는 형태로 동작하였다. 본 연구에서는 BSCCO 선재의 보조 선로 리액터 부분을 초전도체가 아니라 일반 상전도체를 적용하여 스위치와 보조 선로 리액터의 조합에 변화를 주면서 한류 특성에 대한 시뮬레이션을 수행하였다.

  • PDF

A Study on the Short Circuit Characteristic of Metallic Stabilizer Free Coated Conductor for FCL Application

  • Park, Dong-Keun;Kim, Min-Jae;Yang, Seong-Eun;Kim, Young-Jae;Chang, Ki-Sung;Na, Jin-Bae;Ko, Tae-Kuk
    • Progress in Superconductivity and Cryogenics
    • /
    • v.9 no.4
    • /
    • pp.37-40
    • /
    • 2007
  • As power demands increase, development of the superconducting fault current limiter (SFCL) is being watched with interest. Many types of SFCLs using various superconducting materials have been developed. Especially, the FCL using coated conductor (CC) has been investigated actively at present. CCs have many advantages for the FCL application. YBCO materials used in CCs have a high n-value, and it is relatively easy to choose a matrix of the CC for high resistivity. If the CC has high resistivity, high voltage can be applied to the CC. Then total length of the CC used in SFCL, which has effects on total price and volume of the SFCL, can be reduced. Short circuit tests of two different types of CCs in the liquid nitrogen bath and its sub-cooled condition were performed and analyzed. An effect of high resistivity of the CC and cooling methods on fault current limiting characteristics could be verified in this paper.

Analysis Characteristic of $2{\times}3$ Three Phase Matrix-type SFCL by fault type in power system ($2{\times}3$ 구조의 삼상 매트릭스형 초전도 한류기의 고장 유형에 따른 동작특성 비교)

  • Jung, Byung-Ik;Cho, Yong-Sun;Choi, Hyo-Sang;Chung, Dong-Chul;Hwang, Jong-Sun
    • Proceedings of the KIEE Conference
    • /
    • 2009.07a
    • /
    • pp.2105_2106
    • /
    • 2009
  • 매트릭스형 초전도 한류기는 구조의 특성상 여러개의 초전도 소자가 삽입되게 되었다. 이러한 여러개의 초전도 소자들 중 어느 한 개가 열화되거나 고장이 발생했을때 한류 동작이 정상적으로 이루어지지 않는다면 안정성면에서 신뢰성을 얻기는 힘들 것이다. 따라서 본 논문에서는 직 병렬로 연결된 초전도 소자의 고장 소자의 위치에 따른 한류기의 동작특성을 비교 분석하였다. 삼상 매트릭스형 초전도 한류기의 trigger part와 current-limiting part의 초전도 소자 단선시 사고전류 제한 특성과 정상동작하는 초전도 소자의 전압특성을 비교 분석하였다.

  • PDF