棒电极直径和端部形状对短空气间隙交流击穿电压的影响研究  

Study of the Effect of Rod Electrode Diameter and Tip Shape on AC Breakdown Voltages of Short Air Gaps

作　　者：阳林[1] 傅鹏 丁家宝 郝艳捧[1] 李立浧[1] YANG Lin;FU Peng;DING Jiabao;HAO Yanpeng;LI Licheng(School of Electric Power,South China University of Technology,Guangzhou,Guangdong 510641,China)

机构地区：[1]华南理工大学电力学院,广东广州510641

出　　处：《广东电力》2024年第4期115-122,共8页Guangdong Electric Power

基　　金：国家自然科学基金面上项目(52077084)。

摘　　要：空气间隙交流击穿特性试验常采用棒棒、棒板电极作为试验电极,目前棒电极直径、棒端部形状对空气间隙交流击穿电压的影响尚不清晰。为此,用直径2 cm、1 cm的圆棒和直径1 cm的尖棒搭建棒棒、棒板电极,开展5~40 cm短空气间隙下的交流击穿试验,研究棒电极直径和端部形状对空气间隙交流击穿电压的影响。结果表明:在试验棒电极直径和端部形状范围内,空气间隙距离5~20 cm时,各棒棒或棒板电极空气间隙击穿电压相对偏差在5.93%~33%之间,随着空气间隙距离增大,棒电极直径和端部形状对棒棒、棒板空气间隙击穿电压的影响逐渐减弱;空气间隙距离大于20 cm时,各棒棒或棒板电极空气间隙击穿电压相对偏差均小于5%。研究认为,空气间隙距离超过20 cm时,棒电极直径和端部形状对棒棒、棒板空气间隙击穿电压无影响。The air gap AC breakdown characteristic test often uses rod-rod and rod-plate electrodes as test electrodes,and the influence of rod electrode diameter and rod end shape on the air gap AC breakdown characteristic is still unclear.In this paper,the rod-rod and rod-plate electrodes are constructed with 2 cm and 1 cm diameter round rods and 1 cm diameter pointed rods,and the AC breakdown test is carried out under a short air gap of 5~40 cm to study the influence of the rod electrode diameter and tip shape on the AC breakdown characteristics of the air gap.The results show that within the range of the diameter and tip shape of the test rod electrodes,the effects of rod electrode diameter and end shape on the breakdown voltage range from 5.93%to 33%at a gap distance of 5~20 cm,and the influence gradually decreases with the increase of the gap distance.When the gap distance is more than 20 cm,the relative deviations of breakdown voltage of each rod-rod or rod-plate electrode are both less than 5%.It is considered that the rod electrode diameter and tip shape have no effect on the rod-rod and rod-plate gap breakdown voltages when the gap distance exceeds 20 cm.

关 键 词：空气间隙 棒棒电极 棒板电极 交流击穿电压 电极形状 电极直径 

分 类 号：TM855[电气工程—高电压与绝缘技术]