基于雷电冲击的绝缘液体放电后续冲击波现象观测与分析  

Analysis and Observation of Subsequent Shock Wave Phenomena in Insulation Liquid Discharge Based on Lightning Impulse

作　　者：郦申聪 LI Shencong(State Grid Shanghai Electric Power Company Urban Power Supply Company,Shanghai 200122,China)

机构地区：[1]国网上海市电力公司市区供电公司,上海200122

出　　处：《集成电路应用》2024年第7期338-340,共3页Application of IC

摘　　要：阐述利用纹影照相技术在变压器油中观测冲击波现象,以及实验装置的设计。实验在正雷击电压下,在5mm,10mm,15mm的非均匀间隙下进行。结果表明,在传播过程中,冲击波的传播速度随时间的增加而逐渐减小,表明冲击波的压力随距离的增大而逐渐减小。同时提出一种描述冲击波压力与传播速度之间的关系的简化函数,用于估计由于电子和热能耗散而产生的流注内的初始压力。流注通道内的压力剖面可以更好地了解液体排放的物理性质。This paper describes the details of a self-developed experimental device for observing shock wave phenomena in transformer oil using schlieren photography technology.The experiment was conducted under positive lightning voltage and non-uniform gaps of 5mm,10mm,and 15mm.The results indicate that during the propagation process,the propagation speed of the shock wave gradually decreases with the increase of time,indicating that the pressure of the shock wave gradually decreases with the increase of distance.It proposes a simplified function that describes the relationship between shock wave pressure and propagation velocity,used to estimate the initial pressure inside the jet due to electron and thermal dissipation.The pressure profile within the injection channel can provide a better understanding of the physical properties of liquid discharge.

关 键 词：绝缘液体 流注 冲击波 纹影照相技术 冲击波速度 

分 类 号：TM855[电气工程—高电压与绝缘技术]