固体介质纳秒脉冲沿面放电实验系统设计  

Experimental System Design for Surface Discharge of Solid Dielectric under Nanosecond Pulses

作　　者：钟理鹏 汪沨[1] 杜俊贤 孙秋芹[1] 陈赦[1] 高嘉辰 ZHONG Lipeng;WANG Feng;DU Junxian;SUN Qiuqin;CHEN She;GAO Jiachen(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学电气与信息工程学院,长沙410082

出　　处：《实验室研究与探索》2024年第11期69-72,共4页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(52107147);湖南省学位与研究生教学改革研究项目(2022JGSZ020,2023JGYB075)。

摘　　要：为了培养新工科背景下学生的工程能力和实践创新思维,搭建了固体介质纳秒脉冲沿面放电实验系统,包括幅值数百千伏和前沿数十纳秒的脉冲电压发生装置、纳秒脉冲电压测量装置、固体介质沿面放电实验装置、双向拉伸聚丙烯薄膜自动更换控制装置。基于所搭建系统设计了固体介质沿面放电及电压测量实验,获得了不同陡度下的输出脉冲电压波形,并得到了SF6体积分数为0%、40%、80%、100%时不同陡度脉冲下薄膜闪络电压随气压的变化规律。最后,探讨了闪络电压饱和现象的产生机制,并分析了电极间距对饱和现象的影响规律。结果表明,该实验系统可有机融入高电压技术课程教学与课题研究,提升电气学科专业人才的培养质量。To foster engineering skills and innovative practical thinking in students under the context of new engineering,we established a surface discharge experimental system for solid dielectrics under nanosecond pulses.This advanced system comprises a pulse voltage generation device capable of producing voltages in the range of several hundred kilovolts with rise times in the tens of nanoseconds,a nanosecond pulse voltage measurement device,a solid dielectric surface discharge experimental apparatus,and an automatic film-changing control mechanism for biaxially oriented polypropylene film.Based on the established system,experiments for solid dielectric surface discharge and corresponding voltage measurement were designed,obtaining output pulse voltage waveforms under varying steepness conditions.The variation patterns of flashover voltage with gas pressure were determined for SF6 volume fractions of 0%,40%,80%,and 100% under pulses of varying steepness.The underlying mechanisms of the flashover voltage saturation phenomenon were investigated,and the influence of electrode spacing was analyzed through experimental studies.The test results indicate that the experimental system can be seamlessly integrated into the teaching and research of high-voltage technology courses,thereby enhancing the quality of talent cultivation in the electrical engineering discipline.

关 键 词：固体介质 纳秒脉冲 沿面放电 闪络电压 实验系统 

分 类 号：TM85[电气工程—高电压与绝缘技术]