Power Management Strategy for a Multi-Hybrid Fuel Cell/Energy Storage Power Generation Systems

This paper depicts a new configuration for modular hybrid power conversion systems, namely, multi-hybrid generation system (MHGS), and parallel connection at the output,such that the converter of each unit shares the load current equally. This is a significant step towards realizing a modularpower conversion system architecture, where smaller units can be connected in any series/parallel grouping to realize any required unit specifications. The supercapacitor (SC) as a complementarysource is used to compensate for the slow transient response of the fuel cell (FC) as a main power source. It assists the FC to meet the grid power demand in order to achieve a better performance and dynamic behavior. Reliable control of the proposed MHGS withmultiple units is also a challenging issue. In this paper, a simple control method to achieve active sharing of load current amongMHGS modules is proposed. The simulation results verify the performance of the proposed structure and control scheme

Keywords:

multi-hybrid generation system (MHGS) , fuel cell (FC) , dc/dc converter , supercapacitor (SC) , average load sharing(ALS)