Breakdown Characteristics and Size Effect in Sub-Cooled Liquid Nitrogen

被引：0

作者：

Hayakawa, Naoki ^{[1
]}

Nishimachi, Seiichiro ^{[2
]}

Mastuoka, Tastuya ^{[2
]}

Kojima, Hiroki ^{[1
]}

Hanai, Masahiro ^{[1
]}

Okubo, Hitoshi ^{[3
]}

机构：

[1] Nagoya Univ, EcoTopia Sci Inst, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Nagoya Univ, Dept Elect Engn & Comp Sci, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[3] Aichi Inst Technol, Dept Elect & Elect Engn, Toyota 4700392, Japan

来源：

PROCEEDINGS OF THE 2014 IEEE 18TH INTERNATIONAL CONFERENCE ON DIELECTRIC LIQUIDS (ICDL 2014) | 2014年

关键词：

Sub-cooled liquid nitrogen; Superconducting power apparatus; Breakdown; Bubble; Size effect; AREA;

D O I：

暂无

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：

We systematically investigated and discussed the ac breakdown (BD) characteristics and mechanisms of liquid nitrogen (LN2) for different pressures (0.1-0.3 MPa) and temperatures (65-77 K) under quasi-uniform electric field (field utilization factor zeta = 0.986-0.674). The BD strength (E-B) in sub-cooled LN2 (SLN2) was analyzed and discussed in terms of size effect, taking account of the stressed liquid volume (SLV) with the electric field distribution in SLN2. We also included the other reseachers' data on BD characteristics of LN2, and extended the evaluation by applying the concept of alpha % SLY (SLV with the electric field strength higher than the decisive electric field factor (alpha) of the highest electric field strength). As the result, we found that E-B with the 50 % probability decreased linearly with the increase in alpha % SLY on a universal line, i.e. E-B = 78.4 x (alpha % SLY) (-1/8.15), irrespective of the pressure and temperature of LN2.

引用

页数：4

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