With a large number of distributed generators (DGs) integrated into the power grid, electric current in the system now flows in both directions, posing a serious challenge to traditional fault locating methods. This paper proposes an integer linear programming‐based approach: it constructs a fault section location model using fault current information and topological relationships, and designs a correction method relying on local information for feeder terminal unit (FTU) information anomalies. When multiple remedy schemes are available, section merging is implemented to ensure reliability. Validated by MATLAB, the method works effectively in both generator and inverter scenarios, unaffected by DG switching. It realizes rapid and accurate localization of single/multi‐point faults in complex multi‐source lines even with information anomalies, with an average time less than 0.2 s in a 33‐node network. Compared to intelligent optimization algorithms, it features faster speed and higher accuracy. Furthermore, the method in this paper demonstrates better adaptability to large‐scale distribution networks. © 2026 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.
WANG et al. (Thu,) studied this question.