高电压技术2017，Vol.43Issue(9)：2857-2865,9.DOI:10.13336/j.1003-6520.hve.20170831012
环氧基碳纳米管纳米电介质的直流真空沿面闪络特性
Surface Flashover Characteristic of EP/MWCNTS in Vacuum Under DC Voltage
摘要
Abstract
The surface flashover voltage of the interface between solid and atmosphere is much lower than the breakdown voltage in the same atmosphere,which restricts the rapid development of ultra-high voltage electrical equipment.The modification of a solid insulating material can improve the flashover performance of the gas-solid insulation system.Consequently,we prepared the epoxy resins with multi-walled carbon nanotobes (MWCNTS) particles in 8 different mass fractions,which are 0％,0.02％,0.05％,0.1％,0.125％,0.1％,0.2％,0.5％,respectively.Then,the experiments of microscopy morphology,glass transition temperature,dielectric constant,surface roughness,resistivity,surface potential decay (SPD),and DC flashover in vacuum were conducted.The experimental results show that the surface flashover voltage first increases and then decreases as filler loadings increases,and reaches the climax with the filler doping mass fraction of 0.1％,and the flashover voltage increases 23.1％ compared with neat epoxy resin.It is found that the increase of the surface flashover voltage is related to the increase of the trap depth and the decrease of the dielectric constant when the filler doping mass fraction is low,while the decrease of flashover voltage results from the increasing of dielectric constant and the density of shallow traps at high filler doping mass fraction.It can be concluded that the dielectric constant will cause the electric field distortion,and the depth and density of the trap will affect the carrier transport process,both of which will affect the flashover voltage.关键词
碳纳米管/环氧树脂/沿面闪络/陷阱/介电常数/表面粗糙度/表面电位衰减Key words
carbon nanotubes/epoxy resin/surface flashover/trap/dielectric constant/surface roughness/surface potential decay引用本文复制引用
李枕,黄印,闵道敏,李盛涛,林生军,康文斌..环氧基碳纳米管纳米电介质的直流真空沿面闪络特性[J].高电压技术,2017,43(9):2857-2865,9.基金项目
国家自然科学基金(51337008) （51337008）
国家重点基础研究发展计划(973 计划)(2015CB251003) （973 计划）
清华大学电力系统国家重点实验室开放课题(SKLD16KZ04) （SKLD16KZ04）
中国博士后科学基金(2014M552449) （2014M552449）
中央高校基本科研业务费专项资金(xjj2014022) （xjj2014022）
西安交通大学“新教师支持计划”(DWSQc130000008).Project support by National Nature Science Foundation of China (51337008),National Basic Research Program of China(973 Program) (2015CB251003),State Key Laboratory of Power System of Tsinghua University (SKLD16KZ04),Postdoctoral Science Foundation of China (2014M552449),Fundamental Research Fund for the Central Universities of China (xjj2014022),Program for New Teacher of Xi'an Jiaotong University (DWSQc130000008). （DWSQc130000008）
