一起光纤复合架空地线雷击故障的分析探讨

Analysis and Discussion on a Lightning Fault of Optical Fiber Composite Overhead Ground Wire

介绍了江苏宿迁地区发生的一起光纤复合架空地线(OPGW)断缆导致通信骨干业务中断的故障,根据断缆区域和光纤中断警告时间和GPS雷电定位系统检索,可判断该OPGW断缆为雷击所致。通过观察分析,雷电弧高温发生在绞线层和线间,为了提高OPGW的耐雷水平,建议500 kV和重要骨干电路尽量采用层绞结构OPGW光缆。

A cable-broken fault on optical fiber composite overhead ground wire （OPGW） in Suqian area of Jiangsu province is introduced, which led to the interruption of key communication. Based on the fault area, alarm time and the search of GPS lightning location system, the cause is considered as lightning. According to the observation and analysis, high temperature resulting from lightning electric located between stranded wire and stranded wire layer. In order to improve lightning resistance ability of OPGW, OPGW with stranded wire layer structure is suggested to adopt for 500 kV and key circuits.