Aging of Kraft Paper Insulation in Natural Ester Dielectric Fluid

被引：0
|
作者：
Abdelmalik, A. A. [1 ]
Fothergill, J. C. [2 ]
Dodd, S. J. [3 ]
机构：
[1] Ahmadu Bello Univ, Dept Phys, Zaria, Nigeria
[2] City Univ London, London EC1V 0HB, England
[3] Univ Leicester, Dept Engn, Leicester LW1 7RH, Leics, England
来源：
PROCEEDINGS OF THE 2013 IEEE INTERNATIONAL CONFERENCE ON SOLID DIELECTRICS (ICSD 2013), VOLS 1 AND 2 | 2013年
关键词：
ester fluid; insulation paper; thermal aging; tensile strength; breakdown strength; CELLULOSE INSULATION; TRANSFORMERS;
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：
The aging behavior of transformer insulation Kraft paper aged in a natural ester oil, recently developed from palm kernel oil, is compared to the behavior of paper samples aged in mineral insulating oil. This study aimed to investigate the effect of the natural ester oil on the aging of cellulose insulation paper if used as an alternative insulating fluid in transformers. Thermally upgraded insulation paper was aged in both insulating fluids together with strips of galvanized steel, copper and aluminium to represent the transformer, under nitrogen pressure in a sealed mild steel pressure vessel for 150 degC for 28, 56, and 84 days. The degradation after aging was assessed using tensile strength and breakdown strength measurements of the paper. The paper samples impregnated with natural ester fluid exhibited similar behavior before and after aging, with an approximately 5% reduction in tensile strength after 28 days of ageing. Two sets of response were obtained for paper samples aged in mineral insulating oil under the same ageing conditions; the paper closer to the copper strips had a faster degradation rate (similar to 35% reduction). The natural ester fluid retarded the aging of the Kraft paper. The characteristic breakdown strength of natural ester impregnated paper was found to be, on the average, 42% better than that of mineral oil impregnated paper.
引用
收藏
页码：541 / 544
页数：4
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