Abstract
Abstract DC Microgrids are receiving a growing interest thanks to the advantages offered by the integration of renewable sources. This paper presents an optimal hierarchical control for DC microgrids that performs multiple control objectives, like (i) voltage regulation, (ii) minimization of the losses, (iii) power-sharing, (iv) energy storage management and (v) economic savings. The hierarchical control is made up of sequential actions so that, at the higher level, the optimal plan for power generators and for storage systems is generated and then sent to the model predictive control. This controller is the core of this study and it has three main functions such as (i) voltage regulation, (ii) energy storage management and (iii) tracking of the optimal planning, taking into account the different characteristics of the DC components and generating the references for the low-level controller. The proposed control based on optimization has been validated with good results on the real low-voltage DC microgrid in RSE.
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