The Simulation Study on Accurate Fault Location of Short-Circuit Faults in Grid-Connected AC Microgrids Under Short-Distance Conditions

With the development of microgrid technology, shortcircuit fault detection and location have become key challenges for the reliable operation of microgrids. To achieve accurate fault location in AC microgrids, a microgrid simulation model was constructed in MATLAB/Simulink in this study. The short-circuit faults under different distributed generation capacities were analyzed. Fault features were extracted using wavelet energy spectrum transformation, and a BP neural network was employed to train the fault location model. Simulation results indicate that the proposed method can achieve early fault detection and precise location, particularly demonstrating high accuracy in short-distance fault scenarios under grid-connected mode.