Power control of a stand-alone photovoltaic/ wind/ energy storage hybrid generation system with Maximum Power Point Tracker

In this paper, a hybrid generation system combining photovoltaic (PV), wind turbine (WT) and Electric Double Layer Capacitor (EDLC) is presented to supply stable power to residential power applications as stand-alone loads. The photovoltaic and wind systems are used as main energy sources while the EDLC is used as storage device. Three individual DC/DC converters are used to control the power flow to the load. Control with DC/DC converters is used for Maximum Power Point Tracker (MPPT) and hence maximum power extracting from the solar photovoltaic systems and wind turbine. The aim of this paper is to compensate power fluctuation of renewable energy using Maximum Power Point Tracker. The system controls EDLC power to match demand and supply power. If PV and WT generate power is lower than demand power, the EDLC is controlled to discharge power to complete the difference of supply and demand power. If PV and WT generate power is higher than demand power, the EDLC is controlled to charge power. The system was simulated by using MATLAB/Simulink. The simulation results show the proposed system can compensate power fluctuation.