Independent Photovoltaic Power Generation System Battery Charge Control Strategy

In order to improve the efficiency of the battery charge and extend the battery life of the single stage grid connected PV systems; get a new charge control strategy. The voltage, temperature differential fuzzy control strategy use dual batteries to replace the previous same capacity single battery,In the whole process of charging with the current of photovoltaic system, the charging voltage of the termination based on the battery charge voltage and internal temperature characteristics;at the same time with voltage, temperature differential fuzzy control algorithm can prevent the external light intensity and temperature environment change as a result of battery charge in advance of the removal, but also to protect the battery overcharge.In this paper,firstly build the model of PV array and battery in the environment of Matlab/Simulink.Then simulating the PV,IV curve of the model of PV array and the soc,T and V curve of the battery. The simulation results of Matlab/Simulink show that the control strategy to get a significant high-efficiency battery charging and extend battery life.