Ground fault current analysis with a direct building algorithm for microgrid distribution

A direct building algorithm for microgrid distribution ground fault (MGDGF) analysis is proposed in this paper. Four possibilities of the network topology changes were considered with the proposed iterative process for ground fault analysis. This paper also discusses the ground fault model of a battery energy storage system (BESS) as a distributed energy resource (DER), which can be used for both islanded and grid-connected modes. The proposed algorithm is robust and accurate. Test results demonstrate the potential of the proposed algorithm in MGDGF applications.