基于分布参数模型的平行双回线故障测距新算法

基于输电线路的分布参数模型，提出利用线路两端电量的同杆平行双回线故障测距算法。根据同向正序电压故障分量沿线分布规律，使用搜索的方法确定故障距离，精确地确定各种对称、不对称跨线故障及单回线故障位置。仿真计算表明该算法测距精度高，且不要求两端数据同步，不需要判别故障类型，不存在伪根，不受线路负荷、系统阻抗和过渡电阻的影响。

Fault locating algorithm for double-circuit line based on distributed parameter

Based on the distributed parameter model of power transmission line,a new fault loca-ting algorithm for double-circuit line using the data of two terminals is presented.According to the distribution regularity of positive voltage's fault component along the transmission line and app-lying search method,it determines accurately the distance of fault point for various symmetric or non-symmetric inter-circuit or single-circuit faults.Furthermore,it does not require the synchronized data of two terminals and fault type identification,eliminates the influence of S/C resistance,line load and system impedance,and there is on false root.