高电压技术2011，Vol.37Issue(6)：1321-1328,8.
变压器油中水分对糠醛扩散及分布影响的分子动力学研究
Impacts of Water Within Transformer Oil on the Diffusion and Distribution Characteristics of Furfural by Molecular Dynamics
摘要
Abstract
Furfural is an aging by-product of power transformer insulation paper.The concentration of furfural can be directly used as a tool to evaluate the aging extent of insulation paper.However,no universally acknowledged production mechanisms and distribution laws of furfural in oil-paper system have been obtained.Among various influential factors,water is considered to play an important but ambiguous role in effecting furfural＇s production rate and distribution.Therefore,four naphthenic mineral oil models,of which the water contents were set to 0%,1%,3% and 5% respectively,were constructed by means of molecular modeling.Molecular dynamics were performed on the models subsequently.By investigating interactions between furfural and ambient media,hydrogen bonding and diffusion phenomenon of furfural in oil,the microscopic mechanism of water influencing the diffusion and distribution characteristics of furfural in oil-paper composite system was revealed.Research results show water in transformer oil would significantly enhance oil＇s ability in absorbing furfural and improve solubility of furfural in oil as well.Moreover,water in transformer oil suppresses the free diffusion of furfural in oil which will exert native influence on furfural＇s homogeneous distribution in oil.关键词
变压器/油中水分/糠醛/扩散/分布/分子动力学Key words
transformer/water in oil/furfural/diffusion/distribution/molecular dynamics分类
信息技术与安全科学引用本文复制引用
廖瑞金,周欣,杨丽君,朱孟兆,贡春艳,李伟..变压器油中水分对糠醛扩散及分布影响的分子动力学研究[J].高电压技术,2011,37(6):1321-1328,8.基金项目
国家重点基础研究发展计划（973计划） （）
国家自然科学基金 （）
