An Energy Storage System Composed of Photovoltaic Arrays and Batteries with Uniform Charge/Discharge

The main purpose of this study was to develop a photovoltaic module array (PVMA) and an energy storage system (ESS) with charging discharging control for batteries apply in grid power supply regulation high proportions renewable energy. To the flow at DC load charge/discharge battery uniformly, work adapted bidirectional buck–boost soft-switching converter maximum point tracking (MPPT) technique array. First, boost is used perturb observe (P&O) method, so that can (MPP) any time. When output greater than power, excess charge battery; on contrary, if lower discharges auxiliary supply. This makes voltage link maintain constant value. monitoring circuit sends current signals TMS320F2809 digital signal processor (DSP) produced by Texas Instruments charging/discharging current. works MPP improve performance overall system. Finally, actual test result shows work, when compared hard-switching converter, efficiency nearly 4% above 125 W. generation operation between 150 W 400 W, proposed uniform architecture rapidly reach uniformity.