Conditions for the applicability of the geometrical similarity law to impulse breakdown in gases
Conditions for the applicability of the geometrical similarity law to impulse breakdown in gases
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DOI：
10.1109/tdei.2010.5539689
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发表时间：
2010-08
影响因子：
3.1
通讯作者：
S. Dekić;P. Osmokrović;M. Vujisić;K. Stanković
中科院分区：
文献类型：
--
作者：
S. Dekić;P. Osmokrović;M. Vujisić;K. Stanković
本文根据冲击击穿电压的随机性，用统计方法研究了几何相似律适用于气体冲击击穿的条件。对几何相似系统，即宏观电场和微观电场形状相同的系统，给出了理论分析和实验结果。这些实验是在受控的实验室条件下进行的，气体压力和电极间间隙的值范围很大。使用双电极系统，电场均匀和不均匀，使用SF6、N2和He气体作为绝缘体。施加了标准的闪电和开关电压脉冲，以及不同斜率的斜坡形脉冲。在对所得实验结果进行统计处理的基础上，得出了几何相似定律适用于气体冲击击穿的条件。
This paper investigates the conditions for the applicability of the geometrical similarity law to impulse breakdown in gases, using statistical methods necessitated by the stochastic nature of the impulse breakdown voltage. Theoretical analysis in the paper is accompanied by experimental results obtained for geometrically similar systems, i.e. for systems with equal shapes of the macroscopic and microscopic electrical field. The experiments were conducted in controlled laboratory conditions, for a wide range of gas pressure and inter-electrode gap values. Two-electrode systems were used, with both homogeneous and non-homogeneous electrical fields, utilizing SF6, N2 and He gases as insulators. Standard lightning and switching voltage impulses were applied, as well as ramp-shaped impulses with different slopes. On the basis of the statistical processing of the obtained experimental results, conclusions regarding the conditions for the applicability of the geometrical similarity law to impulse breakdown in gases are drawn.