II. MODEL OF PFWHS
A schematic diagram of PV/FC/Wind hybrid system (PFWHS) consists of PV array, wind turbine (WT), electrolyzer (EL), hydrogen storage tank (HST), fuel cell (FC) and inverter is shown in Fig. 1. The PV array and wind turbine work together to satisfy the load demand.When the total generated energy of the PFWHS is greater than the load demand, the extra energy will be supplied to feed the EL for hydrogen production. Also when the total generated energy of the PFWHS is lower than the load demand, the deficit energy is compensated by FC until the hydrogen of HST is depleted.