避雷线作用的仿真分析

使用ATP-EMTP软件选取矿区常用的110 kV级的输电线路作为仿真研究对象,建立雷击输电线路的模型,并进行仿真研究:雷电绕击于输电线路仿真;分流系数仿真;耦合系数仿真。通过对仿真情况的分析,认为避雷线有防绕击作用、分流作用、屏蔽作用和耦合作用,对输电线路防雷起着很重要的作用。为设计和运行部门在实际输电线路上,如何合理地采用防雷保护措施,提供可靠的依据。

Simulation and Analysis on the Effect of Ground Wire

The normal 110 kV transmission line-level is selected as the object of simulation by using ATP-EMTP software,the model of lightning strike transmission line is built and the simulation study is carried out: the simulation of shielding failure on transmission line;the simulation of shunt coefficient;the simulation of coupling coefficient.Through the analysis of the simulation situation,it is considered that ground wire has advantages of anti-shielding failure effect,shunting effect,shielding effect and the coupling effect,so it plays an important role in lightning protection of transmission line.The reliable basis is provided for how to use lightning protection measures reasonably for the departments of design and operation in the actual transmission lines.And it has great significance for safe operation of coal mine power supply system.