基于电弧力效应理论对开关型SPD续流的研究

发布时间：2018-04-23 06:13

本文选题：电弧力效应 + 雷电波　；参考：《电瓷避雷器》2014年06期

【摘要】：针对开关型SPD续流的问题主要是由于两电极气隙击穿时,击穿电压较低引起。通过电极击穿时电弧力效应理论的分析,得出电弧力主要由电子力、静电力、电磁力、等离子流力等组成。采用8/20us模拟雷电波冲击气体间隙,试验得出冲击电压在17.5k V-20k V以下时,电极所受电弧力与冲击电压呈正相关,冲击电压值在17.5k V-20k V以上时,电极所受电弧力与冲击电压呈负相关,且电弧力始终不小于零,即电弧力对电极的作用主要为向外的排斥力。提出了在开关型SPD设计中,放电电极一个处于固定状态,另一个电极处于可动状态,利用电弧力效应,拉长电极间隙的长度,增加两电极间残压,起到提前灭弧,减小续流的方法,在实际应用中,具有一定的实用价值。
[Abstract]:The problem of on-off SPD continuous current is mainly due to the low breakdown voltage when the two electrode gap is broken. Through the analysis of the arc force effect theory when the electrode breaks down, it is concluded that the arc force is mainly composed of electronic force, electrostatic force, electromagnetic force, plasma fluid force and so on. 8/20us was used to simulate the gap of lightning shock gas. When the impulse voltage was below 17.5kV-20kV, the arc force was positively correlated with the impulse voltage, and the impulse voltage was above 17.5 kV -20kV. The arc force is negatively correlated with the impulse voltage, and the arc force is always not less than zero, that is, the arc force acting on the electrode is mainly an outward repulsive force. In the design of switched SPD, one electrode is in a fixed state and the other electrode is in a movable state. By using the arc force effect, the length of the gap between the two electrodes is lengthened, and the residual voltage between the two electrodes is increased so as to extinguish the arc ahead of time. The method of reducing the continuous flow has certain practical value in practical application.
【作者单位】：南京信息工程大学中国气象局气溶胶-云-降水重点开放实验室;
【基金】：国家自然科学基金项目(编号:41075025)
【分类号】：TM862

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