Influence of Bubble Formation on the Dielectric Behavior of Liquid Nitrogen

被引：17

作者：

Blaz, M. ^{[1
]}

Kurrat, M. ^{[1
]}

机构：

[1] Tech Univ Carolo Wilhelmina Braunschweig, Intitut Hochspannungstech & Elekt Energieanlagen, D-38106 Braunschweig, Germany

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2011年 / 21卷 / 03期

关键词：

Bubbles; cryogenic insulation; electric breakdown; liquid nitrogen; BREAKDOWN CHARACTERISTICS;

D O I：

10.1109/TASC.2010.2079910

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents the results of the investigation of liquid nitrogen as an insulation liquid. Thereby the influence of sub-cooled liquid nitrogen and the presence of bubbles between Rogowski electrodes stressed with lightning surge impulses are investigated. These bubbles were produced directly on the electrode surface without a damage of the electrode surface. The results show that the sub-cooled liquid nitrogen has a positive effect on the breakdown strength. However the presence of bubbles reduces the breakdown strength significantly regardless if the liquid nitrogen is sub-cooled or not. Furthermore the breakdowns occur earlier if bubbles are present between the electrodes.

引用

页码：1896 / 1899

页数：4

共 10 条

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[2]

EKIN JW, 2006, EXPT TECHNIQUES LOW, pA5

[3] DIELECTRIC-BREAKDOWN CHARACTERISTICS OF CRYOGENIC NITROGEN GAS ABOVE LIQUID-NITROGEN [J].