环氧树脂/富勒烯纳米复合材料空间电荷注入特性  

Space Charge Injection Characteristics of Epoxy/C60 Nanocomposite

作　　者：李进 王雨帆 杜伯学 孔晓晓 杨威 尹立 田中康宽 LI Jin;WANG Yufan;DU Boxue;KONG Xiaoxiao;YANG Wei;YIN Li;YASUHIRO Tanaka(Key Laboratory of Smart Grid of Ministry of Education(School of Electrical and Information Engineering,Tianjin University),Nankai District,Tianjin 300072,China;State Key Laboratory of Advanced Transmission Technology(Global Energy Interconnection Research Institute Co.,Ltd.),Changping District,Beijing 102209,China;Measurement and Electric Machine Control Laboratory,Tokyo City University,Tokyo 158-8557,Japan)

机构地区：[1]智能电网教育部重点实验室(天津大学电气自动化与信息工程学院),天津市南开区300072 [2]先进输电技术国家重点实验室(全球能源互联网研究院有限公司),北京市昌平区102209 [3]东京都市大学测量与电机控制实验室,日本东京158-8557

出　　处：《中国电机工程学报》2022年第13期4974-4981,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51807136,U1966203)。

摘　　要：高温与强电场作用下环氧树脂绝缘空间电荷注入诱发电场畸变,加剧绝缘劣化甚至引起击穿放电故障,严重威胁电力、电子设备安全稳定运行。纳米掺杂在提升环氧树脂复合材料介电性能方面表现优异,但高温与强电场下纳米复合材料的空间电荷注入抑制效果及机理仍有待进一步证实与分析。该文制备了不同含量富勒烯(C_(60))掺杂的环氧树脂纳米复合材料,采用改进的电声脉冲法研究其在高温(80℃、150℃)和强电场(100、150kV/mm)条件下空间电荷注入与积聚特性。结果表明,C_(60)的引入对高温、强电场下环氧树脂绝缘电荷注入和积累有明显的抑制作用。基于密度泛函理论计算分析环氧树脂和富勒烯的分子轨道能级和3D电势分布规律,发现C_(60)量子点能够调控EP/C_(60)纳米复合材料电荷输运行为,抑制载流子的注入,减少空间电荷的积累。上述试验和仿真结果证明,掺杂C_(60)可以有效改善环氧树脂绝缘高温和强电场下空间电荷注入特性。The space charge injection of epoxy resin under high temperature and electric stress can induce the electric field distortion,which aggravates insulation degradation and even causes breakdown discharge failures,seriously threatens the safe and stable operation of electrical and electronic equipment.Nanodoping can improve the electrical properties of epoxy resin composites,but the suppression effect of space charge injection with nanocomposites under high temperature and electric field still needs future confirmation.In this paper,epoxy resin nanocomposites doped with different contents of fullerene(C_(60))were prepared and the space charge behaviors were investigated under high temperature(80℃and 150℃)and the high electric stress(100 and 150kV/mm)using an improved pulsed electro-acoustic(PEA)method.The results show that the introduction of C_(60) can suppress the charge injection into epoxy resin under high temperature and high electric stress.The energy levels and 3D potential distributions of C_(60) were calculated based on the density functional theory(DFT),and it can be found that C_(60) quantum dots can regulate the charge transport behavior of EP/C_(60) nanocomposites and reduce the space charge accumulation.The experimental and simulation results indicate that doping C_(60) could effectively improve the space charge injection behaviors of epoxy resin under the high temperature and the high electric stress.

关 键 词：高温强场 环氧树脂 空间电荷 富勒烯 分子能级 3D静电势 量子点 

分 类 号：TM216[一般工业技术—材料科学与工程]