Influence of Moisture Content on Cellulose Structure and Breakdown Strength of Vegetable Oil-Impregnated Paper

被引：13

作者：

Li, Yafei ^{[1
]}

Zhong, Lisheng ^{[1
]}

Yu, Qinxue ^{[1
]}

Zhang, Chen ^{[1
]}

Jiang, Songlin ^{[1
]}

Xue, Fei ^{[1
]}

Li, Huaqiang ^{[1
]}

Zhao, Yaohong ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Shaanxi, Peoples R China

来源：

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION | 2019年 / 26卷 / 04期

基金：

中国国家自然科学基金;

关键词：

oil-impregnated paper; moisture content; breakdown; crystal; cellulose; TRANSFORMER; EQUILIBRIUM; INSULATION; PRESSBOARD; LIQUID;

D O I：

10.1109/TDEI.2019.007987

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：

aThe performance of oil-impregnated paper significantly affects the safety and reliability of transformers. Previous studies on water reducing the breakdown strength of oil-impregnated paper have been mainly due to increasing charge carriers and conductivity. However, the influence of water on the cellulose crystal structure of oil-impregnated paper is still not clear; in particular, its role on breakdown strength remains ambiguous. In this study, the AC breakdown strength and crystal structure of vegetable and mineral oil-impregnated paper with different moisture contents were investigated. The results show that with increasing moisture content, the cellulose crystallinity and crystal size increases linearly, while the breakdown strength decreases. The breakdown strength of vegetable oil-impregnated paper is higher than that of mineral oil-impregnated paper and is less affected by moisture. Herein, a model is proposed on the effects of water on the crystal structure of oil-impregnated paper and the correlation of breakdown strength with crystal structure is reported.

引用

页码：1245 / 1252

页数：8

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