This letter presents a novel parameter-free fault location algorithm for a two-terminal single circuit untransposed line with flat and delta conductor configurations while considering unsynchronized measurements. It improves the existing works by introducing unequal angles of synchronism mismatch in pre-fault and fault conditions. EMTP-RV based simulation results corroborate the validity and accuracy of the developed fault location algorithm. Simulation results are also compared with existing methods to demonstrate improved features of the proposed algorithm. Field test results are also presented to further validate the performance of the proposed algorithm.

中文翻译：

---

一种改进的非同步终端未换位线路无参数故障定位器


这封信提出了一种新颖的无参数故障定位算法，适用于具有扁平和三角形导体配置的两端单电路未换位线路，同时考虑了不同步测量。它通过在故障前和故障情况下引入不等角度的同步失配来改进现有的工作。基于EMTP-RV的仿真结果证实了所开发的故障定位算法的有效性和准确性。仿真结果还与现有方法进行了比较，以证明所提出算法的改进功能。还提供了现场测试结果，以进一步验证所提出算法的性能。