基于实验室模拟高压放电冲击力的研究

RESEARCH ON IMPACT FORCE OF HIGH-VOLTAGE DISCHARGE BASED ON LABORATORY SIMULATION

关键词:  冲击波；高压放电；超压  冲击电流

Key words:  shock wave  high-voltage discharge  overpressure  impulse current

摘要:

为了研究高压放电冲击波的特性，通过对冲击波的理论分析，基于自主设计的一套实验装置对实验室条件下模拟高压放电产生的冲击力大小进行了量化试验。利用2.6/50 μs冲击电流发生器模拟产生放电冲击波，依次改变冲击电流的幅值及离放电球中心位置的距离，测定水平方向的冲击力大小。实验结果表明：在25～100 kA冲击电流下，离放电球中心位置50 mm处水平方向的冲击力大小为1.6～3.3 N；随着冲击电流的增加以及离放电球中心位置距离的减小，水平方向的冲击力呈逐渐增加趋势。当离放电球中心位置的距离超过60 mm时，冲击力的大小受距离的影响较小。所得结论为研究自然界闪电冲击波的特性提供了一定参考依据。

Abstract:

To study the characteristic of the high-voltage discharge shock wave, the present research conducted theoretical analysis on the shock wave. One test device was set up to simulate and measure the high-voltage discharge impact force under laboratory conditions. The present research used the 2.6/50 impulse current generator to make the discharge shock wave. The impulse current and the distance to the center position of the discharge sphere were changed to measure the impact force in the horizontal direction. The conclusions are drawn as follows: When the impulse current is 25～100kA, and the distance to the center of the discharge sphere is the 50mm, the impact force in the horizontal direction is about 1.6～3.3N. When the impulse current increases and the distance to the center of the discharge sphere decreases, the impact force in the horizontal direction tends to increase. When the distance to the center of the discharge sphere exceeds 60mm, impact force change caused by distance becomes small. The conclusion may provide reference for the study of the characteristics of natural lightning shock wave.