In this paper, the total system losses in dc microgrid are compared with the losses of ac microgrid. There are several studies about loss calculation in ac and dc system [5], [6]. Most of them concluded losses of dc system are lower than ac system, but the reduction effect is very small except data centers [7]. In this study, we used practical load data and estimated PV output data of one year to calculate the losses in a more practical condition. The load data was measured in real residential complex, and the PV output was calculated from the global solar radiation and the temperature of PV panel, which were measured by Osaka University.
II