高电压技术2011，Vol.37Issue(2)：268-275,8.
采用分子模拟法分析变压器油纸绝缘材料的相互作用
Analysis of Interaction Between Transformer Oil and Cellulosic Insulation Paper Using Molecular Simulation Method
摘要
Abstract
Oil-paper insulation is an important insulation mode in transformer, and the interaction between oil and cellulosic paper strongly affects the oil-paper compound insulation. Consequently, the interaction between cellulose, which is the main component of transformer insulation paper, and power transformer oil is studied using the molecular dynamics simulation. The interaction energies between the oil and cellulose decreases in sequence of the (110) face, the (1-10) face, and the amorphous phase of cellulose, indicating that the interface of crystals may be the main area that the oil flow electrification appears. Thus, the molecular conformation of the oil on the different cellulosic surfaces is analyzed. On the surface of the cellulose I|3 crystal, the conformation of the oil is mainly parallel to the surfaces, however, on the surface of cellulose amorphous phase, the conformation of the oil is mainly perpendicular to the interface. The space charge will appear most easily at the surface of the amorphous cellulose and oil. Finally, the density distributions of three models in the Z direction are calculated, and the results show that the density of the oil will increase but it hardly changes on the interfaces between oil and cellulose amorphous phase. The change of density may prevent the diffusion of water in paper, and accelerates aging of paper.关键词
分子动力学/油纸绝缘材料/相互作用/分子构象/密度分布/油流带电/空间电荷Key words
molecular dynamics/ oil-paper insulation materials/ interaction/ molecular conformation/ density distribution/ oil flow electrification/ space charge分类
信息技术与安全科学引用本文复制引用
廖瑞金,朱孟兆,杨丽君,周欣,严家明,孙才新..采用分子模拟法分析变压器油纸绝缘材料的相互作用[J].高电压技术,2011,37(2):268-275,8.基金项目
国家重点基础研究发展计划(973计划)(2009CB724505-1) （973计划）
中央高校基本科研业务费资助(CDJXSll152235). （CDJXSll152235）
