油介质中水合氢离子扩散的分子动力学模拟  

Molecular Dynamics Simulation of Diffusion Behavior for Hydronium Ion in Hydrous Oil Dielectric

作　　者：朱孟兆[1,2] 廖瑞金[1] 周欣[1] 杨丽君[1] 孙才新[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]山东电力研究院,济南250002

出　　处：《高电压技术》2011年第8期1930-1936,共7页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724505-1);中央高校基本科研业务费资助(CDJXS11152235)~~

摘　　要：酸性环境下的水解是变压器绝缘材料老化的重要形式之一。为给变压器材料的水解老化提供微观信息,利用分子动力学对不同水分含量的油中水合氢离子的扩散行为进行了模拟研究。对水合氢离子的扩散系数的分析表明,油中水分含量对水合氢离子的扩散产生了较大影响,随着水分含量的增加,水合氢离子的扩散系数在不断减小。水合离子与含水油介质的相互作用是影响水合氢离子扩散的最重要的因素,自由体积对其影响较小。模拟结果间接地说明了变压器绝缘材料老化时水分和酸的协同作用。Acid hydrolysis is an important form of aging of power transformer insulation materials. The diffusion be- havior or hydronlum ion in the hydrous oll dielectric was investigated using molecular dynamics. It is found that the diffusion of hydronium ion in oil dielectric is isotropic and greatly influenced by water. The diffusion coefficient con- tinuously decreases with increase of water content. The plays a predominant role in affecting diffusion behavior less plays the role. Simulation results indirectly indicate power transformer insulation materials. interaction between hydronium ion and hydrous oil medium of hydronium ion, whereas the free volume comparatively the synergism of water and acid in accelerating the aging of

关 键 词：水合氢离子 含水油介质 分子动力学 扩散 相关性 模拟 

分 类 号：TM855[电气工程—高电压与绝缘技术]