Sliding Mode Control of DC Microgrids with Constant Power Loads

The growing interest in carbon free energy, the necessity of energy equity and reliable electricity in disadvantaged communities such as remote areas attract the researchers' interest toward DC microgrids. DC microgrids with renewable resources are vulnerable to small disturbances in their DC sources. The main source of these disturbances are weather uncertainties and ripples resulting from AC/DC converters in their AC sources. These uncertainties may lead to instability in microgrids especially in the presence of constant power loads (CPLs). DC microgrids' stability mainly depends on DC bus voltage deviation. This paper proposes a new sliding mode control approach for a DC microgrid to guarantee the stability of the DC bus voltage.