低压配电线路直击雷过电压暂态分析

Transient analysis on direct overvoltage of low voltage distribution line

利用电磁暂态仿真软件ATP-EMTP建立直击雷过电压仿真模型,模拟雷电流直接击中导线和击中杆塔情况下产生过电压的过程,分析了绝缘子闪络电压、杆塔冲击接地电阻以及导线悬挂高度等影响低压配电线路直击雷耐雷水平的因素,提出了提高低压配电线路耐雷水平的防护措施。

Using the electromagnetic transient simulation software ATP-EMTP,a direct lightning overvoltage simulation model was established to simulate the process of overvoltage when the lightning current directly struck the conductor and the tower.In this paper,the factors such as the insulator flashover voltage,the tower grounding resistance and the wire suspension height affect the direct lightning strike lightning level of the low-voltage distribution line were analyzed,and the protective measures to improve the lightning-resistant level of the lowvoltage distribution line were proposed.