Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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高压脉冲放电电极气隙击穿点特征的试验研究

来源:电工电气发布时间:2020-09-17 13:17 浏览次数:65
高压脉冲放电电极气隙击穿点特征的试验研究
 
李洪阳
(北京市雷闪防雷设施检测服务中心,北京 102299)
 
    摘 要:针对高压脉冲放电中异形放电电极对电弧路径起始点影响的特征,使用马克思发生器制造高压脉冲电弧,通过更换不同形状的正负电极形成不同的电弧路径,观察多次放电试验并进行样本统计。得出了高压脉冲电弧正极放电发射点只受极间距离影响,在气隙击穿至负电极的最短距离处形成电弧。负电极的击打点与其曲率半径相关,在最小曲率面处被击穿。通过气隙击穿放电路径的选择性试验研究,为探究雷电放电路径选择性的规律提供了参考。
    关键词:高压脉冲放电;气隙击穿;发射点;击打点;曲率半径
    中图分类号:TM835;TM862     文献标识码:A     文章编号:1007-3175(2020)09-0047-04
 
Experimental Study on the Characteristics of Air Gap Breakdown Point of High Voltage Pulse Discharge Electrode
 
LI Hong-yang
(Beijing Leishan Testing Service Center of Lightning Protection Facilities, Beijing 102299, China)
 
    Abstract: In view of the characteristics of the effect of abnormal discharge electrodes on the starting point of arc path in high voltage pulse discharge, a Marx generator was used to create a high-voltage pulse arc, by changing the positive and negative electrodes of different shapes to form different arc paths, observe multiple discharge tests and conduct sample statistics.It is concluded that the emission point of positive electrode is only affected by the distance between the electrodes, and an arc is formed at the shortest distance from the gap to the negative electrodes.The strike point of the negative electrode is related to its radius of curvature and is broken down on the minimum curvature surface.The selectivity test of air gap breakdown discharging path is helpful to explore the selectivity rule of lightning discharging path. Suggestions for design of needle selection and equipment manufacturing of direct lightning protection flasher are given.
    Key words: high voltage pulse discharge; air gap breakdown; emission point; strike point; radius of curvature
 
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