Performance Evaluation of Dual Active Bridge Converter for Energy Storage Integration With STATCOM

The integration of distributed generation into the electrical distribution network has seen huge growth in the last decade. With the injection of variable power into the EDN, it has affected the voltage regulation and raised the power quality issues like fluctuations in active power demand and unbalance in loading among the three phases of EDN. To improve the power quality of DG dominated EDN, it is essential to use VAR compensation and storage system at the common coupling point(CCP). A single system with has the features of statcom and storage system can be employed. This is can be achieved by integrating storage module with a voltage source converter(VSC) and use of appropriate control technique to provide required VAR compensation and energy support. The Dual Active Bridge(DAB) can be used to integrate the storage modules with VSC because of better efficiency. The topology to form the system to provide VAR compensation and energy support has been discussed. Along with this, the procedure to design the fractional order PI controller and its performance for DAB. The effectiveness of the system has been validated using MATLAB/Simulink environment.