10kV绝缘架空线路避雷线的保护角选择  

Discussion on the Shielding Angle of Ground Wire in 10kV Insulated Overhead Distribution Lines

作　　者：张静 金明 程云国 王华明 徐玉荣 张哲维 张慈梦 甘鹏程 严欣 ZHANG Jing;JIN Ming;CHENG Yunguo;WANG Huaming;XU Yurong;ZHANG Zhewei;ZHANG Cimeng;GAN Pengcheng;YAN Xin(State Grid Power Supply Company of Hangzhou Yuhang District,Hangzhou 311100,China;College of Electrical Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]国网浙江杭州市余杭区供电公司,杭州311100 [2]武汉大学电气工程学院,武汉430072

出　　处：《电瓷避雷器》2019年第2期84-89,共6页Insulators and Surge Arresters

摘　　要：10kV配电线路分布广泛,绝缘水平低,在雷电活动频繁的地区,雷害事故经常发生。随着配电网的绝缘化改造,雷击断线问题日益显著。介绍了避雷线防雷原理,架设避雷线时需要考虑的因素,保护角对避雷线的绕击率、耦合系数、雷击跳闸率的影响,结合一个实例介绍10kV绝缘架空线的避雷线保护角选择方法,并在EMTP中进行了仿真,验证其防雷效果,得出典型的单回水泥杆塔10kV绝缘架空线架设避雷线选取保护角的最佳方案为25°。The 10kV distribution lines are widely distributed and the insulation level is low.In areas with frequent lightning activities,lightning accidents often occur.With the insulation transformation of the distribution network,the problem of lightning strikes is becoming more and more significant.The lightning protection principle of the lightning protection line is introduced.The factors to be considered when setting up the lightning protection line,the influence of the protection angle on the lightning protection rate,coupling coefficient and lightning trip rate of the lightning protection line.The method of selecting the lightning protection angle of the 10kV insulated overhead line is introduced with an example,and the simulation is carried out in EMTP to verify its lightning protection effect.It is concluded that the optimized scheme for choosing shielding angle is 25°for typical single loop 10kV cement tower insulated line insulated overhead line to equipped with a ground wire.

关 键 词：避雷线 10KV架空配电线路 防雷措施 

分 类 号：TM863[电气工程—高电压与绝缘技术]