A fuzzy-Logic Control strategy for a hybrid fuel cell-battery system offering ancillary services

This paper proposes a fuzzy based local control for a hybrid fuel cell-battery system in order to integrate Distributed Generation (DG) into the distribution grid. Either the grid is connected to the mean voltage side or working in islanded mode, the proposed system offers ancillary services. The performance of the system is evaluated when the grid changes from the connection mode to the islanded operation.