考虑输电线路波特性的影响，提出一种适用于输电线路线间短路故障高精度定位技术。本文根据选取相间故障定位函数值最小的点为相间短路故障点，原理上消除了故障电阻、故障位置和线路两端电源相角差等因素的影响，具有很高的定位精度。该相间故障定位技术已在福建电网生产实践投入应用。

A new fault location function based on distributed parameter line model is generated, which takes the influences of shunt capacitance into consideration. The method is immune to the influence of shunt capacitance with distributed parameters modeling for two-terminal transmission line, and is not disturbed by fault resistance and load current. The simulation results by PSCAD /EMTDC show that the proposed method is correct and validity.