一种无需参数整定的混合线路故障行波定位方法

为解决混合线路故障行波定位中行波波速与线路长度参数整定的难题,论文分析了混合线路中故障行波的传输特性,提出了一种无需参数整定的故障行波定位方法。该方法在线路不同位置设置多个模拟故障点,依次试验测试或仿真测试线路上各个模拟故障点产生的故障行波传输到该线路首端与末端的时间差,构建基准行波时差数组;当线路实际发生故障时,由行波采集装置测量行波信号到达线路首端与线路末端的时间差,与基准行波时差数组中各元素比较,判别故障区段;并计算故障点在故障区段线路的相对位置,根据各杆塔或电缆接头的位置确定故障点准确位置。仿真结果表明该方法无需整定线路长度和行波波速,且定位结果不受线路弧垂的影响,具有算法简单、实用性强、定位精度高的优点。

A Novel Traveling Wave Based Fault Location Method with Non-parameter-threshold-setting for Hybrid Power lines

To solve the parameters threshold setting problem of travelling wave velocity and line length for traveling wave based hybrid power lines fault location , the transmission characteristics of fault traveling wave were analyzed , and a novel traveling wave based fault location method with non-parameter-threshold-setting was presented in this pa-per.Firstly, the standard array of traveling wave arrival time difference between the two terminals of line was built with more faults simulated in the different positions of the line .Secondly , when the actual line fault happened , the ar-rival time difference was measured and compared with each element of the standard array to detect the fault section . Finally, the fault point relative position in the fault section was calculated , and the fault point accurate position was also determined with the position of each tower or cable joint .The simulation results showed that the effectiveness and feasibility of the presented method with non-parameter-threshold-setting for hybrid power lines , which is with the sim-ple algorithm , strong practicality and high accuracy for fault location .