不同温度下环氧树脂空间电荷特性仿真研究  

Simulation of Space Charge Characteristics of Epoxy Resin at Different Temperatures

作　　者：秦司晨 屠幼萍[1,2] 金花 陈冰莹 谭天 王璁[1,2] QIN Sichen1,2, TU Youping1,2, JIN Hua3, CHEN Bingying1,2, TAN Tian1,2, WANG Cong1,2(1. Beijing Key Laboratory of High Voltage ＆ Electromagnetic Compatibility, North China Electric Power University, Beijing 102206, China; 2. State key Laboratory of Alternate Electric Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China; 3. School of Control and Computer Engineering, North China Electric Power University, Beijing 102206, Chin)

机构地区：[1]华北电力大学高电压与电磁兼容北京市重点实验室,北京102206 [2]华北电力大学新能源电力系统国家重点实验室,北京102206 [3]华北电力大学控制与计算机工程学院,北京102206

出　　处：《高压电器》2018年第5期144-149,155,共7页High Voltage Apparatus

基　　金：国家重点基础研究发展计划项目(973计划)(2006CB200303;2006CB2003056);国家自然科学基金项目(51577062)~~

摘　　要：研究直流电压下环氧树脂复合材料的电荷输运特性对推进直流气体绝缘金属封闭输电线路的发展至为重要。文中基于双极性载流子输运模型,通过对0、30、60、105℃下环氧树脂内部的空间电荷分布规律进行数值计算研究,获得了温度对环氧树脂材料内部空间电荷输运特性的影响规律,以及不同温度下环氧树脂复合材料内电场强度分布规律。结果表明:在0℃和30℃下,环氧树脂复合材料内为电子电荷主导,迁移作用使得靠近阳极附近的电场强度升高。随着温度的升高,电荷分布到达稳态所需要的时间随之减少,而电场强度最大值也随之降低。60℃和105℃下环氧树脂内电荷分布与0℃和30℃下的电荷分布呈现完全不同的趋势。高温下电荷的迁移作用和陷阱的捕获作用加强,使得电荷更为容易积聚与电极附近,从而同时削弱阳极和阴极与材料界面处的电场强度。研究成果可以为直流输电管道绝缘子的材料改性和空间电荷特性的精密调控提供理论依据。The study of space charge transport characteristics of epoxy resin under DC voltage is significant to thedevelopment of gas insulated transmission line（GIL）. In this paper,bipolar carrier transport model was establishedto numerical calculus the space charge distribution in epoxy resin at 0,30,60,105 ℃. The influence of temperatureon the internal space charge transport characteristics of epoxy resin,as well as the distribution of electric fieldstrength,was obtained. Results show that the electron charge is dominant in the epoxy resin material,and theelectric field near the anode is increased by the migration at the temperature of 0 ℃ and 30 ℃. With the increase ofthe temperature,the time for charge distribution to reach a new steady-state decreases. However,the chargedistribution of epoxy resin at 60 ℃ and 105 ℃ shows a completely different trend. The enhancement of chargemigration and trap＇s capture makes the charge accumulate near the electrode much more easier,which reduces theelectric field strength at material interface near anode and cathode. The results can provide theoretical basis for thematerial modification of insulators in GIL and precision regulation of space charge characteristics.

关 键 词：环氧树脂 双极性载流子输运模型 数值计算 温度特性 空间电荷 

分 类 号：TM21[一般工业技术—材料科学与工程]