避雷器提高10kV架空绝缘线路耐雷性能研究  

Study on Measures for Improving Lightning Protection Performance of 10 kV Overhead Insulation-covered Conductors

作　　者：何建林[1] 张电[1] 刘渝根[2] 田金虎[3] 

机构地区：[1]重庆市电力公司江北供电局,重庆401147 [2]重庆大学电气工程学院,重庆400044 [3]重庆市电力公司电网检修分公司,重庆400015

出　　处：《陕西电力》2010年第11期1-5,共5页Shanxi Electric Power

基　　金：国家自然科学基金资助项目(59677016)

摘　　要：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;采用Chowdhuri-Gross模型计算感应过电压水平,分析了避雷器对感应过电压的抑制效果。结果显示:装设线路避雷器能够有效提高线路耐雷水平,抑制感应过电压;通过降低杆塔冲击接地电阻、安装线路避雷器、安装穿刺型防弧金具能够有效降低10 kV架空绝缘线路雷击跳闸及断线率。In order to protect the distribution lines,the paper establishes simulation model by electromagnetic transient program （EMTP）,analyzes and compares the effect of improving lightning withstand level by line surge arrester in different programs.The influence of impulse grounding resistance of towers and the locations where lightning stroked are analyzed.Chowdhuri-g-ross model was used to calculate the induced overvoltage,and the inhibitory effect of arrester was analyzed.The results showed that installing the line surge arresters can effectively improve the lightning withstand level of transmission line and inhibit the induced overvoltage.The measures,such as reducing grounding resistance of the towers,installing metal oxide surge arrester with series gap and arc-protection hardware with stabs,can effectively reduce the rate of flashover and lightning-caused breaking of covered conductors of 10 kV 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：TM86[电气工程—高电压与绝缘技术]