Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Analytical and Experimental studies on Dielectric Characteristics of High Voltage Superconducting Machines in Liquid Nitrogen

액체질소를 사용하는 초전도 고전압 전력기기의 절연 특성 연구

  • 나진배 (연세대학교 대학원 전기전자공학과) ;
  • 고태국 (연세대학교 전기전자공학부) ;
  • 강형구 (국립 충주대 전기전자공학부) ;
  • 석복렬 (현대중공업 기계전기연구소) ;
  • 김태중 (한국폴리텍1대학 전기과)
  • Received : 2011.01.31
  • Accepted : 2011.03.18
  • Published : 2011.03.31
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Abstract

The electrical insulation design of high voltage superconducting fault current limiters (SFCLs) should be confirmed to be applied for the stabilization of the power grid. This paper describes numerical analysis and AC dielectric experiments for developing high voltage SFCLs. The electric field distributions between applied high voltage part and ground were calculated by finite element method (FEM) simulation tool and AC criterion of liquid nitrogen at 200 kPa was calculated from correlation between the field utilization factor and FEM simulation results. This paper deals with ceonceptual insulation design of a 154 kV class single-phase no-inductively wound solenoid type SFCL which was focused on gap distance between the cryostat and superconducting coils. Furthermore, the shield ring effect was confirmed to reduce maximum electric field at applied high voltage part.

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References

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  1. A Study on the Dielectric Characteristics of GFRP in LN2under Lightning Impulse Voltage According to Pressure vol.61, pp.10, 2012, https://doi.org/10.5370/KIEE.2012.61.10.1471