Fault Section Location in Distribution Networks Based on Zero-Sequence Current Correlation

To address the challenges of low sensitivity, high implementation costs, and insufficient real-time performance in fault location for distribution networks, this article proposes a fault section location method based on zero-sequence current correlation. By analyzing the correlation differences between zero-sequence current waveforms from both ends of the fault section, this article constructs a correlation coefficient model to quantify signal similarity, enabling fault location through threshold discrimination. Simulation results demonstrate that the proposed method achieves accurate fault location using only single-event fault current data. Compared with existing techniques, our approach requires no additional hardware support, significantly reducing implementation costs and time overhead, thereby providing an efficient solution for distribution network fault diagnosis.