35kV线路避雷器并联保护间隙设计研究  

Study on Shunt Protection Gap Design of 35 kV Line Arrester

作　　者：邱续东 QIU Xudong(Guangzhou Zhonguang Electric Technology Co.,Ltd.,Guangzhou 510530,China)

机构地区：[1]广州中光电气科技有限公司,广东广州510530

出　　处：《电工技术》2024年第9期165-167,共3页Electric Engineering

摘　　要：由于35kV线路普遍没有架空地线,因此常遭受直击雷,导致线路避雷器因雷电流过载而损坏。为此提出了35kV线路避雷器并联保护间隙结构,在线路避雷器两端并联空气保护间隙,通过等效电流计算与间隙放电试验获得了并联间隙结构与距离参数,在雷电流幅值高于保护动作阈值时,避雷器残压击穿并联放电间隙,防止避雷器雷击过载损坏。35kV整支避雷器冲击放电试验与现场应用情况表明,并联间隙可在一定程度上降低35kV线路避雷器雷击损坏概率。35 kV lines generally equip no overhead grounding wire and often encounter direct lightning,resulting in overload and failure of line lightning arresters.In this paper,the parallel gap structure of 35 kV line arrester is proposed.The parallel gap structure and distance parameters are obtained through equivalent current calculation and gap discharge test.When the lightning current amplitude is higher than the threshold value of protection action,the residual pressure of the arrester breaks down the parallel discharge gap to prevent lightning overload damage.The impact discharge test and field application of 35 kV arrester show that the parallel clearance can reduce the lightning damage probability of 35 kV line arrester to a certain extent.

关 键 词：线路避雷器 雷电流过载 并联间隙 冲击放电试验 

分 类 号：TM85[电气工程—高电压与绝缘技术]