Analysis on the Dielectric Characteristics of Insulation Gases for Developing a High Voltage Superconducting Fault Current Limiter

A sub-cooled liquid nitrogen (LN 2 ) cooling system is known as an appropriate method for developing a high voltage superconducting fault current limiter (SFCL). The pressure of a sub-cooled LN 2 cooling system should be controlled by injecting non-condensable gas such as gaseous helium (GHe) and ga...

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Veröffentlicht in:IEEE transactions on applied superconductivity 2011-06, Vol.21 (3), p.1332-1335
Hauptverfasser: KANG, Hyoungku, TAE KUK KO
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description A sub-cooled liquid nitrogen (LN 2 ) cooling system is known as an appropriate method for developing a high voltage superconducting fault current limiter (SFCL). The pressure of a sub-cooled LN 2 cooling system should be controlled by injecting non-condensable gas such as gaseous helium (GHe) and gaseous neon (GNe) into the cryostat. Therefore, the electrical breakdown voltage of current leads is directly influenced by an injected gaseous medium. In this study, electrical insulation experiments on GHe and GNe are conducted and the results are compared with each other. Also, the dielectric characteristics of GHe and GNe are analyzed by using field utilization factors. It is found that the dielectric characteristics of GHe are superior to those of GNe under the same conditions. The experimental results are applicable for designing the current leads of a high voltage superconducting fault current limiter.
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subjects Applied sciences
Connection and protection apparatus
Cooling
Current lead
Dielectrics
Electric breakdown
Electric connection. Cables. Wiring
electrical breakdown
Electrical engineering. Electrical power engineering
Electrodes
Electromagnets
Electronics
Exact sciences and technology
gas insulation
Gases
high voltage superconducting apparatus
Insulation
Lead
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Studies
sub-cooled liquid nitrogen
Superconducting devices
Superconductivity
Various equipment and components
title Analysis on the Dielectric Characteristics of Insulation Gases for Developing a High Voltage Superconducting Fault Current Limiter
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