Abstract：In this paper, a RC charge collector is proposed and the initial plasma characteristics of TVS are experimentally analyzed. The experimental results indicate that a spike appears on the waveform of initial plasma current after triggering voltage appalling, and the waveform of initial plasma current oscillating decreases to zero after the trigger voltage breaking, and the charge of initial plasma includes electronic and ionic charge and the electronic charge is slightly more than ionic charge. The charge of initial plasma is affected by trigger voltage, trigger current, and trigger charge. From experiments, it is shown that the charge of initial plasma increases with the increment of trigger voltage, trigger current and trigger charge, but the ratio of charge of initial plasma to trigger charge decreases with increasing in trigger voltage and the ratio with negative trigger is slight larger than the ratio with positive trigger. After the initial plasma being ejected to the vacuum gap of triggered vacuum switch, they expand in the vacuum gap. The expansion time, during the initial plasma leave the trigger to arrive at anode of triggered vacuum switch, decreases with the increment of trigger voltage below 8kV, and then the expansion time remains stable during 66-69ns with the trigger voltage keeping on growing. And also the expansion time increases from 50ns to 70ns with expanding of the vacuum gap distance of triggered vacuum switch from 0.5mm to 8mm.
胡上茂, 姚学玲, 陈景亮. 沿面闪络触发真空开关初始等离子体特性实验[J]. 电工技术学报, 2012, 27(9): 271-276.
Hu Shangmao, Yao Xueling, Chen Jingliang. An Experimental Study on Initial Plasma Characteristics of Surface Flashover Triggered Vacuum Switch. Transactions of China Electrotechnical Society, 2012, 27(9): 271-276.
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