中压配电线路的雷电过电压仿真研究

Simulation Study on Lightning Overvoltage of Medium Voltage Distribution Line

我国高压输电线路与低压配电网络之间的联系依靠着中压配电网,整个系统供电可靠性的高低很大程度上取决于中压配电网的安全稳定程度。实际上,中压配电线路由于其绝缘水平的原因,受感应雷的影响比较大,严重时甚至会造成线路跳闸。针对此,文中重点研究了中压配电线路遭受感应雷后雷电过电压的分布状况及其他可能造成影响的关键因素,所得结论为后续研究提供了一定的理论依据。

In China,the connection between high-voltage transmission line and low-voltage distribution network depends on medium voltage distribution network,and the power supply reliability of the whole system largely depends on the security and stability of medium voltage distribution network. In fact,due to the insulation level of medium voltage distribution line,it is greatly affected by induced lightning,and even causes line trip when it is serious. In view of this, this paper focuses on the distribution of lightning over-voltage and other key factors that may affect the medium voltage distribution line after the induced lightning. The conclusion of this paper provides a certain theoretical basis for the follow-up research.