DC microgrid concept for mine environment

The use of electric vehicles and inverter-controlled ventilation will increase in the future in underground mines. DC microgrids are analyzed during the last years to be used e.g. in solar and wind farms, ships and datacenters. The possibility to use DC microgrid in a mine production area is analyzed in this study. The steady-state calculations are done to choose the suitable DC voltage level, cable type and power level of converters. After that, the dynamic calculations are done by using simulation model to analyze the stability of the system. Based on the calculations, energy storage is added to the grid and the optimal location of the energy storage is analyzed.