基于GIS的输电线路差异化防雷设计

Differential Lightning Protection Design of Transmission Line Based on GIS

对于高压架空输电线路而言,不同线路走廊的地形地貌对其耐雷性能有较大影响,为了能够有效提高输电线路耐雷性能评估水平,文章提出了一种基于地理信息系统(GIS)的输电线路三维建模方法,并利用该模型对输电线路防雷性能进行仿真计算,该模型能够有效反映输电线路走廊实际的地形地貌对耐雷水平的影响。通过选取西南山区某220 kV线路进行建模、仿真计算,并与实际雷击跳闸率相对比,得到该模型具有较好可靠性的结论。

For high voltage overhead transmission lines,the topography of different line corridors has a great impact on their lightning performance.In order to effectively improve the lightning performance evaluation level of transmission lines,this paper proposes a three-dimensional modeling method of transmission lines based on geographic information system(GIS),and uses the model to simulate the lightning protection performance of transmission lines,The model can effectively reflect the impact of the actual topography of the transmission line corridor on the lightning withstand level.A 220 kV transmission line in southwest mountainous area is selected for modeling and simulation calculation,and the results are compared with the actual lightning trip out rate,and the conclusion that the model has good reliability is obtained.