Design and construction of a charge controller for stand-alone PV/battery hybrid system by using a new control strategy and power management

In this paper, a new control strategy and power management for a stand-alone PV/battery hybrid power system has been suggested. The solar cell arrays provide energy in the steady-state and the battery provides energy in transient states. Here, a charge controller system based on the MPP tracking technology, suitable for using in the islanded micro grid that contains a solar panel and a battery is designed. The charge controller includes a unidirectional DC-DC converter as an interface circuit between the solar panel and the DC bus, a bidirectional DC-DC converter as an interface circuit between the battery and the DC bus with a control system and power management in different states of irradiance and state of charge (SOC). A 200-W prototype system is designed and simulated in MATLAB/Simulink software. Also, a microcontroller DSP TMS320F2812 is applied to construct the charge controller circuit. The simulation and experimental results are showing better performance of the proposed charge controller compared with previous examples. (C) 2017 Elsevier Ltd. All rights reserved.