Coordinated power control of wind-PV-fuel cell for hybrid distributed generation systems

The coordination control problem is investigated for a hybrid distributed energy generation system consisting of a wind turbine with permanent magnet synchronous generator (PMSG), a photovoltaic (PV) array and a proton exchange membrane fuel cell (PEMFC) stack to supply continuous power to the stand-alone loads. Due to the intermittence of both wind and solar PV, these two generation subsystems as the main power sources are controlled in the operation mode of the maximum output power, while the PEMFC as the backup power source is controlled in the operation of achieving the balance power for the demand power. Accordingly, a robust nonlinear controller is designed for the maximal absorption of wind power in consideration of the system parameter uncertainty and external disturbance, a perturbation and observation (P&O) control algorithm is utilized to maximize the PV array output power, meanwhile, a power tracking controller based PID is proposed for the PEMFC subsystem to balance the output power. The simulation validation in MATLAB/Simulink is presented for the effectiveness of the proposed control scheme.