一种无需线路参数的输电线路故障定位算法

摘要

This paper introduces a new fault location algorithm for Transmission Lines, which derives the fault location equation from the relationship between the voltages and currents of positive sequence and negative sequence networks when fault happened. This method not requires line parameters, only by means of the GPS synchronization to acquire the voltages and currents data at both ends of the transmission line, and does some related processing about these data.Then,with the help of the location equation, we can get the accurate fault distance very easily. Compared with traditional methods, this algorithm not only uninfluenced by the disturbances of the changes of transition lines, the fault location and its environment and the fault resistances, but also simple, flexible and more useful. A lot of simulations by the Matlab software have been done, and the results proved the correctness of the algorithm.%提出了一种新的输电线路故障定位算法,该算法利用故障时正、负序网络中各自电压、电流间的关系,导出了故障定位方程.无需线路参数,只需借助GPS实现同步采集线路两端的电压、电流数据,并作相关处理,即可实现故障定位.与传统方法相比,该算法不受线路参数变化、故障发生地点环境以及故障过度电阻等的干扰,实现简单、灵活,实用性更强.同时利用Matlab软件对算法做了大量仿真测试,测试结果证明了该算法的正确性.