Positive streamer propagation in large oil gaps - Experimental characterization of propagation modes
Positive streamer propagation in large oil gaps - Experimental characterization of propagation modes
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DOI：
10.1109/94.689425
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发表时间：
1998-06-01
影响因子：
3.1
通讯作者：
Massala, G
中科院分区：
文献类型：
--
作者：
Lesaint, O;Massala, G
本文介绍了脉冲电压作用下，正向流光在矿物油中大的点-面间隙中传播的实验研究。系统地研究了间隙距离(小于或等于35 cm)、从流注起始电压到大过电压的影响。这些测量涉及击穿电压测量、击穿时间、流光的可视化(条纹和静止照片)、电测量(瞬时电流、电荷)、发光强度。根据流光的传播速度高达100公里/S以上，对流光进行了表征，并将其划分为不同的模式(第二、第三和第四模式)。根据施加的电压，观察到模式之间的转变，并建立了电荷、形状和流光速度之间的关联。然后讨论了物理机制以及实际后果。
This paper presents an experimental study of positive streamer propagation in mineral oil, in large point-plane gaps under impulse voltage. A systematic investigation was done concerning the influence of gap distance (less than or equal to 35 cm), and voltage from streamer inception up to large overvoltages. The measurements presented concern breakdown voltage measurements, time to breakdown, visualization of streamers (streak and still photographs), electrical measurements (transient current, charge), light emission intensity. Streamers are characterized and then classified into different modes (2nd, 3rd and 4th modes) according to their propagation velocities up to more than 100 km/s. According to the applied voltage, transitions between modes are observed, and correlations are established between charge, shape, and streamer velocity. The physical mechanisms as well as practical consequences are then discussed.