A unified method for fault location in multi-voltage microgrids

This paper introduces a novel fault location method suitable for multi-voltage level microgrids using a unified set of equations. The proposed method depends on constructing the bus impedance matrix between the fault point and the nearest bus using the measurements of MicroPMUs located at both buses of the faulted line. To introduce a complete protection algorithm, the proposed fault location method is combined with a previously introduced fault detection method. The proposed complete protection algorithm can accurately detect and locate any type of faults in both islanded and grid-connected modes considering economical implementation. Finally, the proposed algorithm is tested using MATLAB and ETAP software for symmetrical and asymmetrical faults in multi-level microgrids and found effective in any configuration.