Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Insulation Design for a 13.2kV/630A High-Tc Superconducting Fault Current Limiter

13.2kV/630A급 고온초전도 한류기의 절연설계

  • Kang, Hyoung-Ku (Electro-Mechanical Research Institute, Hyundai Heavy Industries, Co., Ltd.) ;
  • Lee, Chan-Joo (Electro-Mechanical Research Institute, Hyundai Heavy Industries, Co., Ltd.) ;
  • Ko, Tae-Kuk (Dept. of Electrical and Electronic Engineering, Yonsei University) ;
  • Seok, Bok-Yeol (Electro-Mechanical Research Institute, Hyundai Heavy Industries, Co., Ltd.)
  • 강형구 (현대중공업(주) 기계전기연구소) ;
  • 이찬주 (현대중공업(주) 기계전기연구소) ;
  • 고태국 (연세대학교 전기전자공학과) ;
  • 석복렬 (현대중공업(주) 기계전기연구소)
  • Published : 2007.07.18
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Abstract

The superconducting fault current limiter (SFCL) consists of superconducting coil for limiting the fault current and cryogenic cooling system for keeping the coil in superconducting condition. The study on the insulation design for superconducting coil and cryogenic cooling system should be elaborately performed to develop a high voltage SFCL. In this paper, insulation design of solenoid coil for 13.2kV/630A SFCL is performed through the AC dielectric breakdown test and lightning impulse dielectric strength test. The dependence of dielectric characteristics on the magnitude of liquid nitrogen pressure is also investigated. Through the investigation, it is verified that dielectric characteristics of sub-cooled nitrogen are strongly enhanced by the pressurization. The electrical insulation design of 13.2kV/630A SFCL is performed by applying the experimental results. The successful insulation design for development of 13.2kV/630A SFCL is confirmed by AC dielectric breakdown tests.

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