±100 kV气体轨道开关击穿特性
Breakdown properties of rail gap switch with voltage of ±100 kV
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摘要: 研制了一种用于快Marx发生器的三电极场畸变结构的气体轨道开关，针对3种不同的绝缘介质N2、干燥空气和SF6/Ar混合气体开展了轨道开关的自击穿特性和触发特性研究。结果表明:轨道开关的自击穿电压与气压基本呈现线性关系，并且在相同实验条件下，相对于N2和干燥空气，当绝缘介质为SF6/Ar混合气体时，轨道开关具有工作电压范围宽、工作系数低、触发击穿延时短、抖动小的优点。采用数码相机拍摄了开关导通过程中形成的放电通道积分图像，初步研究了绝缘介质、电流大小等因素对开关形成多通道的影响。结果表明:提高触发电压、充电电压和放电电流及采用SF6/Ar混合气体均能够有效增加放电通道数目。Abstract: A three-electrode, field-distortion-triggered rail gap switch was developed. The self-breakdown curve of the rail gap switch was obtained with different gas species for insulation, i.e. N2, SF6(15%)/Ar(85%) and dry air, which shows a linearity and a small standard deviation. The experimental results of triggering breakdown demonstrate that, the switch has with the mixed gas of SF6 and Ar wider working voltage, lower working ratio, shorter breakdown delay and smaller jitter compared with that with pure N2 gas or dry air. By using digital camera to record the integral discharging image, the influence of the insulation gas and deposited energy etc. on discharging channel formation was investigated. The results demonstrate that it is helpful to incre
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