A comparative study of Bidirectional DC-DC converter & its interfacing with two battery storage system

This paper presents a comparative review of bidirectional dc-dc converter topologies given by number of researchers. For study and analysis, a basic bidirectional converter operation scheme for interconnection between two batteries system is proposed. The study deals with control and optimal utilization two battery storage system by controlling charging and discharging of battery system. In this system power can flow from one direction to another or vice versa. In this paper two battery storage systems namely A and B are interconnected through bidirectional converter. The Battery A is operating at 48 V and Battery B is operating at 24 V. The bidirectional converter operates at two modes. a) Forward power flow mode and b) Reverse power flow mode. When power flows from 24 V to 48 V batteries bank, the bidirectional converter works as a boost converter. In this mode 24 V battery act as source and 48 V battery acts as load. For power flow from 48 V to 24 V systems the bidirectional converter works as a Buck converter. This proposed scheme dynamically controls the bidirectional converter for different operating load conditions. The simulations are carried out using MATLAB software for control and performance evaluation of Bidirectional converter under different operating conditions.