雷击造成的线路短路点识别和定位方法

摘要

雷击造成线路故障后，故障点的及时识别和定位有利于电力系统稳定运行。对故障性雷击进行仿真，根据故障行波的特点提出判断故障点与雷击点位置异同的方法。并提出利用相关分析法处理故障行波，根据相关法的定义得到相关峰含义，推导得出测距公式，利用测距公式，对仿真模型进行故障测距。测距结果验证表明，该方法对近距离复杂波头的识别准确有效，可有效进行故障性雷击的故障测距。%After line fault caused by lightning stroke, in-time identifying and positioning of fault point is favorable for stable opera-tion of power system. This paper carried out simulation for fault lightning stroke point. According to the features of fault waves, a method to judge the difference between fault point and lightning stroke point was raised and the correlation analysis method was pro-posed to deal with fault travelling wave. According to the definition of correlation, the correlation peak definition was obtained, thus to derive distance measuring formula. The formula was used to carry fault distance measurement for simulation model. The result of distance measurement shows that the method is correct and valid for the identification of short distance complicated peak wave head identification, can effectively carry out fault distance measurement of lightning stroke.