沿面电弧和空气间隙电弧在低气压下的对比  

Comparison of the Performances Surface Arc and Air Gap Arc under Low Air Pressure

作　　者：苏咏梅[1] 王振宇[1] 

机构地区：[1]郑州职业技术学院,郑州450121

出　　处：《电瓷避雷器》2016年第6期1-5,共5页Insulators and Surge Arresters

基　　金：2016年度河南省高等学校重点科研项目应用研究计划(编号:16B413007)

摘　　要：高海拔低气压地区的环境受污情况十分严重,而空气间隙电弧和沿面电弧在低气压下的差异报道较少。以玻璃三角板和针板间隙为模型,研究了电弧在两种情况下的直流放电过程,发现染污沿面直流电弧颜色为红黄色,且电弧存在飘弧现象;空气间隙电弧颜色为绿白色,发出很强绿光,且电弧会发生"游走"现象,电弧的颜色将变为红白色,然后变为紫白色,最后回到针板之间,电弧颜色变回绿白色。研究同时发现,随着气压的降低,染污沿面直流电弧与空气间隙直流电弧E-I特性曲线都会向下移动,但两者仍然存在差异:在同等条件下,染污沿面直流电弧的E-I特性要高于空气间隙直流电弧的E-I特性,且玻璃染污沿面电弧受气压的影响下降程度要低于空气间隙电弧受气压的影响程度。The environmental pollution is very serious in the area with high altitude and low pressure, but currently there are few reports on the difference of air gap arc and surface arc under low air pressure. In this paper, the glass triangle plate and needle plate gap are taken as the sample, and there discharge process under dc voltage is studied. The research show that the dc surface arc is yellow and red, with arc-levitating phenomenon; the air-gap arc is green and white, with strong green sight, and the arc will move around, with its color changed from red white to purple white, finally move back to the needle plate, the arc color changed back to green white. The research also found that with the decrease of air pressure, the properties of the two arcs are is higher than that of air-gap E-I curve of both surface arc and air-gap arc will move downward. But the different, and under the same conditions, the E-I curve of dc surface arc arc. The impact surface arc is lower than that on air-gap arc.

关 键 词：绝缘子 局部电弧 染污 低气压 空气间隙 

分 类 号：TM501.2[电气工程—电器]