基于线路双端零序阻抗的故障测距算法

Fault Location Algorithm Based on Two-Terminal Zero-Sequence Impendence of a Line

电力系统故障以单相故障居多 ,测量零序阻抗从而测量故障距离就具有很强的工程意义 .本文提出了利用接地故障时线路两端的故障录波数据求出线路两侧系统的零序系统阻抗 ,进而算出保护安装处到故障点的距离的一种新型的故障测距算法 .本算法用MATLAB中SIMULINK的电力系统仿真模块进行了建模 ,并用VC6 .0实现算法 ,证明了该算法具有很高的测距精度 .

Line-to-ground fault is the most frequent one in power systems, so how to locate it by zero-sequence impendence is very important. This paper describes a new method of fault location. Zero-sequence impendence can be measured by analyzing the recorded data that come from both the terminals of a fault line. Very effective in engineering application, the algorithm, whose model is built with MATLAB SIMULINK Power System Blockset, has been realized in VC6.0.