马捍超,徐路强,高宝琪,刘刚,苑龙祥.不同地形地貌对超特高压输电线路防雷性能影响分析研究[J].电测与仪表,2019,56(23):37-42. Ma Hanchao,Xu Luqiang,Gao Baoqi,Liu Gang,Yuan Longxiang.Analysis of the Influence of Different Topography on Lightning Protection Performance of UHV and EHV Transmission Line[J].Electrical Measurement & Instrumentation,2019,56(23):37-42.
不同地形地貌对超特高压输电线路防雷性能影响分析研究
Analysis of the Influence of Different Topography on Lightning Protection Performance of UHV and EHV Transmission Line
In this paper, the Self-Consisting Leader Inception and Propagation Model –SLIM- is used to analyze the shielding performance of transmission lines, with special attention on the terrain topography effect. Transverse and Longitudinal terrain profiles are considered. It is found that a transmission line can be more vulnerable to be struck by lightning on any terrain that leads to increase the height of the conductors. In addition, the striking distance to the phase conductors strongly depends on the landform and the tower geometry, so it cannot be considered that it is constant and equal to all conductors as it is suggested by the EGM, which suggests changes in the current lightning protection standards.
