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http://dx.doi.org/10.9714/psac.2010.12.1.052

A Study on the Dielectric Characteristics of Insulation Gases for a Sub-cooled Liquid Nitrogen System  

Kang, Hyoung-Ku (충주대 첨단과학대 전기공학과)
Ko, Tae-Kuk (연세대 공과대 전기공학과)
Publication Information
Progress in Superconductivity and Cryogenics / v.12, no.1, 2010 , pp. 52-55 More about this Journal
Abstract
A sub-cooled liquid nitrogen system is known as a promising method to develop high voltage superconducting apparatuses such as superconducting fault current limiters (SFCLs) and superconducting cables. To develop a high voltage superconducting machine adopting the sub-cooled liquid nitrogen system with a constant pressure. injecting a non-condensable gas is indispensable. In this study. the dielectric characteristics of insulation gases are investigated and analyzed by using electric utilization factors ($\xi$). It is found that the maximum electric field at sparkover that occurs with 50 % probability. $E_{MAX.50%}$ exponentially decreases as the S increases. This means that the $E_{MAX.50%}$ at sparkover can be estimated with the $E_{MAX.50%}$
Keywords
dielectric test; electrical breakdown; field utilization factor; high voltage superconducting machines; sub-cooled liquid nitrogen system;
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  • Reference
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