基于时域方法的输电线路两点异相故障测距

Fault location of transmission line for two point fault occurring on different phases based on the time-domain method

提出了一种利用双端电压电流同步采样值进行高压短输电线路两点异相故障的时域测距方法。该方法基本上不受系统运行方式和过渡电阻大小影响。所有解算均在相坐标中进行,避免了两端电气量的坐标变换。最小二乘技术的应用从理论上保证了该测距算法具有较高精度。对于一点故障测距问题,该方法同样有效。

A time-domain fault location method for the fault of two points on different phases of HV short transmission lines is introduced based on synchronized samples of voltages and currents at two ends of a line. The method is not influenced by the operating mode of the system and transient resistance. All analysis is processing in phase coordinates, and the coordinates′ transformations are avoided. The application of least error squares ensures this method high accuracy of locating fault theoretically. For the fault location of one point, this method is also effective.