一起典型的800kV直流线路雷击故障跳闸分析

Analysis on a Typical Lightning Trip Fault of 800 kV DC Transmission Line

特高压直流输电线路雷击故障跳闸所占总跳闸数的比列已越来越高,对供电的可靠性造成了一定威胁。因此,针对一起典型的800 k V直流线路雷击跳闸事件,通过雷达定位系统与故障巡查处理并进行了详细分析,得出雷电绕击是本次故障事件的主要根源。最后,提出并分析了特高压输电线路雷击的主要防范措施。

The proportion of UHV DC transmission line lightning trip fault event has been increasing higher and higher, it has threaten the reliability of the power supply. Therefore, based on a typical 800kV DC line lightning trip event, the handling and analysis are carried out through locating radar systems and fault inspection,it is draw that lightning shielding is the root cause of this failure. At last, the main precautions of UHV transmission lines lightning are proposed and analyzed.