提高10kV架空绝缘线路耐雷水平综合措施分析  

Analysis on Measures of Improving Lightning Withstand Level of 10kV Overhead Insulation-covered Conductors

作　　者：何建林[1] 张电[1] 刘渝根[2] 田金虎[2] 

机构地区：[1]重庆市电力公司江北供电局,重庆401147 [2]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《机电产品开发与创新》2009年第5期40-42,共3页Development & Innovation of Machinery & Electrical Products

摘　　要：结合雷电定位系统(LLS)对2001～2007年重庆市江北区雷电参数进行了统计分析,采用电磁暂态计算软件(EMTP)建立仿真计算模型,比较、分析了线路避雷器不同安装方案对线路耐雷水平的改善效果,分析了杆塔冲击接地电阻及雷击导线位置对耐雷水平的影响。结果显示:装设线路避雷器能够有效提高线路耐雷水平;通过降低杆塔冲击接地电阻、安装串联外间隙氧化锌避雷器、安装穿刺型防弧金具能够有效降低10kV架空绝缘线路雷击跳闸及断线率。The lightning parameters of 2001-2007 in Chongqing Jiangbei District were collected by lightning location system （LLS） and statistically analyzed. Simulation model established by electromagnetic transient program （EMTP） . Analyze and compare the effect of improving lightning withstand level by line surge an＇ester in different programs. The influence of impulse grounding resistance of towers and the locations where lightning stroked are analyzed. The results showed that installing the line surge attesters can effectively improve the lightning withstand level of transmission line. The measures, such as reducing grounding resistance of towers, installing metal oxide surge arrester with series gap and arc-protection hardware with stabs, can effectively reduce the rate of flashover and lighming-caused breaking of covered conductors of lOkV distribution lines.

关 键 词：雷电过电压 线路避雷器 耐雷水平 架空绝缘线路 防雷措施 

分 类 号：TM8[电气工程—高电压与绝缘技术]