高压直流下激光触发空气间隙放电的实验研究

发布时间：2018-05-03 01:26

本文选题：间隙开关 + 放电　；参考：《中国电机工程学报》2014年21期

【摘要】：随着激光诱导等离子体和空气放电应用结合的日益紧密,激光诱导放电的基本物理过程也得到了广泛的研究。围绕直流高压条件下的纳秒激光诱导放电,研究了不同实验条件(激光入射方式、激光焦点位置)对击穿延时和抖动的影响,并利用ICCD快速照相观察了等离子体的发展过程。结果表明:激光径向入射时,激光焦点偏电极侧有利于击穿延时和抖动的降低;相同激光能量条件下,间隙电压由35 kV提升至45 kV,平均击穿延时由108μs降为4.8μs;相对于径向入射,轴向入射激光烧蚀电极表面并发射电子,可诱导产生一条平直的放电等离子体通道,间隙的平均击穿延时达到亚μs量级(800 ns)。
[Abstract]:With the combination of laser-induced plasma and air discharge, the basic physical process of laser-induced discharge has been widely studied. The effects of different experimental conditions (laser incident mode, laser focus position) on breakdown delay and jitter are studied around nanosecond laser induced discharge at DC high voltage. The development process of plasma is observed by ICCD rapid photography. The results show that the bias electrode side of laser focus is favorable to the reduction of breakdown delay and jitter, and the gap voltage is increased from 35 kV to 45 kV, and the average breakdown delay is reduced from 108 渭 s to 4.8 渭 s under the same laser energy. The axial incident laser ablates the electrode surface and emits electrons, which can induce a straight discharge plasma channel. The average breakdown delay of the gap is up to 800 nm / s.
【作者单位】：中国电力科学研究院;电力设备电气绝缘国家重点实验室(西安交通大学);
【基金】：国家自然科学基金项目(51222704)~~
【分类号】：TM83

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