Insulation characteristics of perfluorocarbon liquid/solid insulation for nonflammable large power transformer

被引：1
|
作者：
Miyagi, K
Horii, S
Sugimoto, T
机构：
来源：
ELECTRICAL ENGINEERING IN JAPAN | 1996年 / 116卷 / 06期
关键词：
nonflammable transformer; perfluorocarbon (PFC); barrier effect; very small gap;
D O I：
10.1002/eej.4391160608
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：
A new type nonflammable large power transformer system is proposed in which the excellent cooling characteristics and insulation properties of nonflammable perfluorocarbon (PFC) liquid is utilized. In the system, transformer windings are put in an insulating cylinder filled with PFC liquid. The core includes cooling panel through the liquid. The space between the insulating cylinder and tank is filled with compressed SF6 gas. This paper describes the insulation characteristics of main insulation and inter-winding insulation models which simulate the transformer. It is found that (1) higher withstand voltage is expected by means of insulation barriers in the main insulation model; (2) partial discharge in inter-winding insulation model is beginning to behave in a constant electric field strength on the point of 0.1 mm liquid gap length.
引用
收藏
页码：83 / 94
页数：12
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