Development and implementation of a unified hierarchical DC droop control scheme for DC microgrids
Document typeMaster thesis
Rights accessOpen Access
This work focuses on the control design of a DC microgrid formed by two DC sources, two Dual Active Bridge (DAB) converters connecting theses sources to a DC bus which, in turn, constitutes the input of a DC/AC grid-connected inverter. The control strategy is based on a three-level Droop DC technique which is in charge of ensuring fast response, stable voltage and steady-state controlled power sharing. The work also suggests a variant of the Droop-based control to improve the system?s performance. The proposed design is validated at simulation and experimental levels on a laboratory prototype of 40 kW performing tests at 12 kW.