提高35kV架空输电线路反击耐雷水平的仿真优化分析

Simulation and Optimization Analysis on Improving The Strike Back Lightning Withstanding Level of 35 kV Overhead

以山西某煤矿35 kV架空线路为实际背景,利用ATP-EMTP仿真软件计算雷击杆塔情况下线路系统的反击耐雷水平。结果表明:对于线路处于易击段的杆塔,在特定的冲击接地电阻值下,在杆塔的不同相加装线路避雷器,系统的反击耐雷水平具有很大差异。对于该类型的线路杆塔,需要结合实际情况选取合理方案,这样既可以使线路系统反击耐雷水平达到预期效果,又能够给防雷施工节省开支、带来便捷。仿真计算结果对35 kV线路防雷设计、改造提供了参考依据。

Taking a 35 kV overhead line of a colliery in Shan Xi Province for practical background, the strike back lightning withstanding level of line system in the case of lightning towers is calculated by ATP-EMTP simulation software. The result show that for the towers which were in easily strike segment, under the specific impact grounding resistance value, and the strike back lightning withstanding level of line system has big difference in the case of adding the line arresters in different phases. For this type of line towers, the reasonable solution should selected according to the actual situation, so that the strike back lightning withstand level of the line system could achieve the desired effect, and it could also bring cost savings and convenient for lightning protection construction. The simulation calculation result provides reference basis for the lightning protection design and transformation of 35kVoverheadlines.