Analytical and experimental studies on dielectric characteristics of high voltage superconducting machines in liquid nitrogen

J. B. Na, T. K. Ko, H. Kang, B. Y. Seok, T. J. Kim

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1 Citation (Scopus)


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.

Original languageEnglish
Pages (from-to)46-50
Number of pages5
JournalJournal of the Korea Institute of Applied Superconductivity and Cryogenics
Issue number1
Publication statusPublished - 2011 Mar


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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