空间电荷对球头棒-板间隙放电击中点的影响  

Effect of Space Charge on Discharge Striking Points of Spherical Rod-plane Air Gap

作　　者：詹花茂[1,2] 颜廷利[1,2] 邓丽红[1,2] 郝丽霞 刘波[1,2] 

机构地区：[1]华北电力大学高电压与电磁兼容北京市重点实验室,北京102206 [2]华北电力大学新能源电力系统国家重点实验室,北京102206 [3]安康供电公司,安康725000

出　　处：《高电压技术》2012年第4期790-796,共7页High Voltage Engineering

基　　金：国家电网公司科技项目(SGKJ[2010]151)~~

摘　　要：雷电引起的输电线路事故中因绕击导致的故障所占比例很大,一些学者认为空间电荷的影响是导致屏蔽失效的原因之一。为此,通过试验研究了直流电压下球头棒-板间隙的电晕电流,以此来衡量一定电压下球头周围空间电荷的量;并试验研究了正极性操作冲击下球头棒-板间隙放电击中点的分布规律,且与尖头棒试验结果比较。试验结果和仿真结果表明:与尖头棒相比,球头棒更容易吸引放电;球头棒周围电场畸变不严重,没有形成有效屏蔽层,从而使放电点更容易发生在头部。Corona current of spherical rod-plane air gap under DC voltage was tested to measure the amount of space charge around the spherical rod under a certain voltage.The distribution of discharge striking points of spherical rod-plane air gap under positive switching impulse was studied,and the experimental results were compared with those from studying the sharply tipped rod.The comparison shows that the spherical rod attracts impulse discharge more easily.The test and simulation result show that no serious electric field distortion occurs around the spherical rod and no effective shielding layer is formed,which makes the discharge striking points easier to occur in the head part of the spherical rod.

关 键 词：空间电荷 球头棒-板间隙 电晕电流 正极性操作冲击 高速摄像 放电击中点 

分 类 号：TM866[电气工程—高电压与绝缘技术]