南方电网技术2024，Vol.18Issue(9)：31-37,68,8.DOI:10.13648/j.cnki.issn1674-0629.2024.09.004
大气压下氮气火花开关击穿过程的数值仿真
Numerical Simulation of Breakdown Process of Nitrogen Spark Switch at Atmospheric Pressure
摘要
Abstract
To study the nanosecond pulsed breakdown process of nitrogen spark switch at atmospheric pressure,the discharge process in the gap is simulated using the particle-in-cell method and the transient physical images of the formation and propagation process of the streamer are obtained.The effect of the pulse voltage rise time on the discharge processes in the gap are comparatively analyzed.The results obtained are as follows.Firstly,the nanosecond pulsed breakdown process of the switch includes the formation and fast propagation of the streamer.Secondly,runaway electrons may be generated in the streamer head and the branches of the streamer channel may be formed due to the photoionization during the fast propagation stage of the streamer.Thirdly,the average propagation velocity of the streamer channel during the streamer fast propagation stage is larger than that during the streamer formation stage.Finally,for the increasing rise time of pulse voltage,the propagation velocity of streamer becomes smaller,the breakdown voltage becomes lower,and the breakdown time delay of the switch becomes longer,which is consistent with the measurement results.关键词
氮气火花开关/纳秒脉冲击穿/粒子模拟Key words
nitrogen spark switch/nanosecond pulsed breakdown/particle-in-cell分类
动力与电气工程引用本文复制引用
夏小飞,刘磊,俸波,范才进,韩方源,厉天威..大气压下氮气火花开关击穿过程的数值仿真[J].南方电网技术,2024,18(9):31-37,68,8.基金项目
国家自然科学基金资助项目(12275222) （12275222）
中国南方电网有限责任公司科技项目(GXKJXM20210264).Supported by the National Natural Science Foundation of China(12275222) （GXKJXM20210264）
the Science and Technology Project of China Southern Power Grid Co.,Ltd.(GXKJXM20210264). （GXKJXM20210264）
