Abstract This study introduces a fault location technique for three-terminal series-compensated untransposed parallel transmission lines utilizing the three terminals’ synchronized data. The proposed technique is applicable for short or long lines as distributed parameter line model is employed and the potential couplings are considered. The fault location for both uncompensated line sections is obtained adopting previously introduced fault location technique. The faulty phases are required initially to be recognized for series-compensated transmission line. The adopted fault location technique for series-compensated line section is derived based on the resistive nature of the fault impedance. The obtained fault locations for each line section are compared with each other to distinguish the faulty branch and obtain the fault location. DIgSILENT Power Factory and MATLAB programs are utilized for simulation studies and required calculations. The obtained results prove the efficacy of the introduced technique.

中文翻译：

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基于PMU的串联补偿三端并联输电线路故障定位技术

摘要 本研究介绍了一种利用三端同步数据的三端串联补偿未换位并联输电线路故障定位技术。所提出的技术适用于短线或长线，因为采用了分布式参数线模型并考虑了潜在的耦合。两个未补偿线路段的故障定位是采用先前介绍的故障定位技术获得的。对于串联补偿的输电线路，首先需要识别故障相。串联补偿线路段采用的故障定位技术是根据故障阻抗的电阻性质推导出来的。将获得的各线路段的故障位置相互比较，以区分故障支路并获得故障位置。DIgSILENT Power Factory 和 MATLAB 程序用于仿真研究和所需的计算。获得的结果证明了所引入技术的有效性。