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提出了一种新的故障定位的精确算法。它是利用输电线路双端电气量进行故障测距的。该方法仅需要线路双端电压及电流测量值，不受线路两端系统阻抗、故障类型及接地电阻等因素的影响；同时该方法避免了两端电气量的坐标变换，在线路两端进行的电气量测量不需要同步。大量的数字仿真结果以及动模实验结果表明，该算法具有相当高的精确度。
A new accurate algorithm of fault location is proposed. It is the use of transmission lines double-ended electrical fault location. The method only needs the double-ended voltage and current measurement of the line, and is not affected by the system impedance, fault type and grounding resistance of the two ends of the line; at the same time, the method avoids the coordinate transformation of the two ends of the electrical quantity, Electrical measurement does not require synchronization. A large number of numerical simulation results and dynamic simulation results show that the algorithm has a very high accuracy.