输电线路防雷措施的仿真与分析

使用ATP-EMTP电磁暂态分析软件选取了矿区常用的110 kV级的输电线路作为仿真研究对象,根据实际参数模拟了雷电流、输电线路、杆塔、绝缘子串和避雷器,建立了雷击输电线路的仿真模型。本文主要针对110 kV输电线路在遭受雷击时,加装与不加装避雷器情况的比较和接地电阻的变化对雷击过程的影响进行仿真分析。得出:输电线路加装避雷器和降低杆塔的接地电阻可以有效保护输电线路的安全,保证煤矿电网的安全稳定运行。

Simulation and Analysis on Lightning Protection Measures of Transmission Lines

The common used 110 kV level transmission lines in the coal mine have been selected as the simulation research object by using the ATP-EMTP Electromagnetic transient analysis software,the lightning current,transmission lines,towers,insulator string and lightning arresters are simulated based on the actual parameters and the simulation model of the lightning stroke on the transmission line has been established.The simulation analysis of two cases with the 110 kV transmission lines struck by lightning are carried out.The lightning situations with and without the installation of lightning arresters are compared and the impact of grounding resistance on the lightning process is analyzed.Through the simulation and the results,the conclusion is obtained and verified: By adding the lightning arrester and reducing the grounding resistance of transmission lines tower,the safety of the transmission line can be effectively protected and the stable operation of coal mine power grid can be ensured.