As the capacity of power systems grows, the need for quick and precise short-circuit fault location becomes increasingly vital for ensuring the safe and continuous supply of power. In this paper, we propose a fault location method that utilizes electromagnetic transient convolution (EMTC). We assess the performance of a naive EMTC implementation in multi-phase power lines by using frequency-dependent parameters in real fault simulation, while using constant parameters in pre-calculation. Our results show that the location error increases as the distance between the fault location and the measurement location increases. Therefore, we adopt the aerial mode transients after phase-mode transformation to perform the convolution, which reduces the influence of frequency-dependence and ground loss. We conduct numerical experiments in a 3-phase 100-km transmission line, a radial distribution network and IEEE 9-bus system under different fault conditions. Our results show that the proposed method achieves tolerable location errors and operates efficiently through direct convolution of the real fault-generated transient signals and the pre-stored calculated transient signals.

翻译：随着电力系统容量的增长，快速精确地定位短路故障对于保障电力安全持续供应变得愈发关键。本文提出一种利用电磁暂态卷积（EMTC）的故障定位方法。我们在实际故障仿真中采用频变参数评估了多相输电线路中原始EMTC实现的性能，同时在预计算中采用恒定参数。结果表明，定位误差随故障点与测量点之间距离增加而增大。为此，我们采用相模变换后的线模暂态量进行卷积，以降低频变参数和地面损耗的影响。我们在100公里三相输电线路、辐射状配电网以及IEEE 9节点系统上进行了不同故障条件下的数值实验。结果表明，所提方法通过对实际故障产生的暂态信号与预存储的暂态信号进行直接卷积，能够在实现可容忍定位误差的同时保持高效运行。