Influence of moisture content on cellulose structure and breakdown strength of vegetable oil-impregnated paper

Autor:	Songlin Jiang, Huaqiang Li, Qinxue Yu, Fei Xue, Chen Zhang, Lisheng Zhong, Li Yafei, Yaohong Zhao
Rok vydání:	2019
Předmět:	010302 applied physics Materials science Moisture Crystal structure Conductivity 01 natural sciences Crystal chemistry.chemical_compound Vegetable oil chemistry 0103 physical sciences Charge carrier Electrical and Electronic Engineering Cellulose Composite material Water content
Zdroj:	IEEE Transactions on Dielectrics and Electrical Insulation. 26:1245-1252
ISSN:	1558-4135 1070-9878
DOI:	10.1109/tdei.2019.007987
Popis:	The 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::72b709cf1ace3a77d499fe2ac3b89ee3 https://doi.org/10.1109/tdei.2019.007987 Zobrazit plný text záznamu