Wind Turbine-DFIG/Photovoltaic/Fuel Cell Hybrid Power Sources System Associated with Hydrogen Storage Energy for Micro-grid Applications

This paper highlights the modeling and the simulation of a micro-grid renewable power system. It comprises a wind turbine (WT) doubly fed induction generators (DFIG), photovoltaic generator (PV), a proton exchange membrane (PEM) Fuel Cell (FC) generator, a water Electrolyzer, a Hydrogen tank, and a battery banks (BBs). The system configuration and the characteristics of the main components in the proposed system are given; and the overall control and power management strategy for this latter are presented. In addition, the dynamic models of a boost DC-DC converter and a bidirectional DC-DC (Buck-Boost) converter are considered. A battery bank (BB) is used for short-term energy storage and an electrolyzer is used for long-term energy storage. The excess power from the WT-DFIGs and PV generators is then used for charging BB and for water electrolyzer to produce hydrogen. The (FC) and the (BB) work as a backup generator to supply the demand required power, when the WT-DFIGs and the PV energy are deficient. All the work is undertaken under Matlab/Simulink environment.