Secondary Control Strategies for DC Islanded Microgrids Operation

Secondary control architectures for islanded direct-current microgrids are getting interest since they are necessary to manage the voltage references in order to properly distribute the time-varying load demand. To this aim, we propose three different optimization-based secondary control approaches considering the internal units constraints, losses minimization and the continuous satisfaction of the load demand. The described approaches are based on a centralized, distributed and cluster-based optimization strategy, respectively.