An adaptive dual phase shift controller for the dual active bridge converter applied in active power transmission and control of microgrid

Abstract

To meet the efficient energy conversion in dual active bridge (DAB) converter-based microgrids, an optimum duty ratio generation is the foremost challenge for the researchers. Therefore, to optimize the current stress on DABs and minimize the conduction losses & reactive power, the current study proposes a novel minimum current point tracking (MCPT) assisted adaptive dual phase shift (DPS) controller for the microgrids. The proposed controller incorporates the simple structure and the conventional perturb and observe (P&O) algorithm to track the active power accurately and transmit it for the optimum phase shift generation. Due to the simple structure of the P&O algorithm, the introduced controller exhibits parameter independence and eliminates the requirement of convoluted system modeling. A comparative study of the introduced controller with its extended phase shift (EPS) counterpart is put through to show the promising performance of the proposed controller. Simulation studies are carried out in the MATLAB/Simulink environment, whereas, the experimental studies are carried away on the DAB prototype regulated through a microcontroller (TI-piccolo 280049C).