城市10kV配电线直击雷过电压仿真计算

Simulation and Calculation of Lightning Over-Voltage in 10kV Distribution Line

基于电磁暂态分析程序ATP-EMTP建立了10kV线路的直击雷仿真计算模型,对城市10kV配电线直击雷过电压情况进行暂态计算分析.以上海市松江电网某线路作为研究对象,建立了雷电源、输电线、杆塔、绝缘子串等模型,最终得到雷击断线过程的线路电压随时间的变化曲线,验证了10kV配电线雷击易断,重现了目标线路的断线过程.

Based on the software of ATP-EMTP, a model of lightning direct strokes on 10 kV distribution line was established, and the over-voltage transient calculation was conducted. Taking a certain power line in Songjiang District as the research object, the models of lightning source, transmission line,tower and arrester were established. Then the change curve of voltage with time during the power line disconnection process was obtained. It is verified that 10 kV line is easy broken by a lightning and the broken process of the target line has reappeared.