摘要
基于电气几何模型提出了利用暴露距离计算线路绕击跳闸率,并与规程法进行了对比结果表明采用该方法计算绕击跳闸率更准确。并且研究了输电线路避雷线和导线的布置,以及地面倾角等对绕击率的影响。通过实例表明了绕击率的变化趋势,这为线路的设计提供了重要的依据。
Uncovered distance is adopted to calculate the shielding failure flashover rate of the transmission line based on EMG. Compared with the regulation method, it is more accurate. The parameters consist of phase wire, shield wire and the ground angle. The results show that the shielding failure flashover rate is a function of shielding angle, stroke lightning amplitude and ground angle. It will help the designers in making the correct judgment.
出处
《四川电力技术》
2008年第3期16-18,共3页
Sichuan Electric Power Technology
关键词
输电线路
绕击跳闸率
电气几何模型
暴露距离
transmission line
shielding failure flashover rate
EGM
uncovered distance
