Multi-layer active power and frequency control strategy for industrial microgrids

Industrial microgrids require control strategies that guarantee high reliability and power quality. In this paper a multi-layer active power and frequency control strategy for industrial microgrids is presented. It is composed by a three-layer hierarchical scheme. The first control layer is based on the droop method. The secondary control layer is based on an event-driven communication scheme that launches a protocol which controls the secondary terms. The tertiary control layer calculates an optimal economical dispatch. The proposed control guarantees an excellent performance in terms of frequency restoration and power sharing. Experimental results obtained on a laboratory microgrid are presented to validate the performance of the proposed control scheme.