DC Micro-grid with Isolated Bi-directional Converter-based Battery Storage System

In this paper, a PV integrated battery storage system (BSS) is implemented to maintain the power demand. The power demand is fulfilled by maintaining the output DC voltage constant by charging and discharging the battery accordingly. In the initial stage, a photovoltaic (PV) system along with Boost converter having Perturb and Observe (P&O) control has been implemented. In the next step, an isolated DC-DC Dual Active Bridge (DAB) bidirectional converter (BDC) is used to charge the battery in one mode and use the battery as a power source to power the load in another mode. In the later stage, battery charging and discharging has been discussed and it has been efficiently implemented. For various load applications required constant output voltage is being properly maintained. All the works have been successfully simulated in MATLAB-SIMULINK and it can be considered for future work as a reference for zero current switching (ZCS) and zero voltage switching (ZVS) switching of the bidirectional converter for a more efficient and economical way of using it for long term application.