Ground Fault Analysis of Independent Microgrid based on Symmetrical Components

Abstract

This paper proposes an algorithm for calculating currents and voltages during ground fault using the symmetric components, which has been conventionally used in power system fault analysis, with the equipment information constituting an independent micro grid system. The validity of the proposed algorithm is evaluated by PSCAD/EMTDC, and it was shown that the calculation accuracy of the proposed algorithm is sufficiently high. A method for calculating the ground compensation capacitor is also described.