500kV线路杆塔雷电冲击全波电磁暂态特性研究  

Study on Lightning Full-Wave Electromagnetic Transient Performance of 500kV Transmission Line

作　　者：甘艳[1] 姚勇[1] 张昌[1] 陈柔 黄瑞莹 GAN Yan;YAO Yong;ZHANG Chang;CHEN Rou;HUANG Ruiying(Central China Grid Company Limited,Wuhan 430077,China;School of Electrical Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]华中电网有限公司,武汉430077 [2]武汉大学电气工程学院,武汉430072

出　　处：《电瓷避雷器》2018年第4期86-92,共7页Insulators and Surge Arresters

摘　　要：为了研究土壤电阻率、雷电流幅值以及波前时间等不同因素对500kV线路杆塔在雷击时杆塔全波电磁特性的影响,建立了线路-杆塔-接地极一体化模型,计算了雷电冲击下考虑不同雷电流参数、土壤电阻率参数的500kV输电线路杆塔电磁暂态特性影响。计算结果表明,避雷线分流大小随着土壤电阻率和雷电流幅值的增加而增加,波前时间的改变对其影响较小;通过引下线向土壤散流的电流随着土壤电阻率的减小和雷电流幅值的增大而增大;接地体电压和横担电压均随着土壤电阻率和雷电流幅值的增加而增加,并不改变峰值出现时刻,波前时间的改变会同时改变峰值和出现时刻。In order to study the effect of the soil resistivity,lightning current amplitude and wavefront time of different factors on 500kV on line tower lightning tower full wave electromagnetic character-istics,A line-pole-tower-ground integrated model was established to calculate the electromagnetic tran-sient characteristics of a 500kV transmission line tower considering lightning current parameters and soilresistivity parameters under lightning impact. The calculation results show that the ground wire shunt sizeincreases with the increase of soil resistivity and lightning current amplitude,the front time change haslittle influence on the current through the wire;The current dissipated to the soil through the deflectorwire increases with the decrease of the soil resistivity and the increase of the lightning current amplitude;Both ground body voltage and cross arm voltage increase with increasing soil resistivity and lightning cur-rent amplitude,does not change the peak time,changes in the wavefront time will change both the peakand the moment of occurrence.

关 键 词：线路杆塔 雷电流参数 土壤电阻率 一体化模型 电磁暂态特性 

分 类 号：TM862[电气工程—高电压与绝缘技术]