Comparative Analysis of Control Algorithms in Isolated Dual Active Bridge for Ultra Fast Charging of Electric Vehicles

The move towards electric mobility was sparked by the detrimental effects of the dominance of petroleum-based transportation. The major challenge associated with the widespread adoption of electric vehicles (EVs) is its range anxiety. For a smooth transition to EVs and to ensure uninterrupted operation, there is an urgent need for an ultra-fast charging (UFC) infrastructure that matches the convenience of the petrol refueling network. The charging infrastructure for UFC has two power electronic conversion stages: the rectifier AC-DC stage and DC-DC conversion stage. The modulation techniques offered for dual active bridge (DAB) encompass single phase shift modulation (SPSM), dual phase shift modulation (DPSM), and triple phase shift modulation (TPSM). A comparative analysis between the traditional phase shift algorithm known as single phase shift (SPS) and dual phase shift (DPS) of DAB converter for UFC is carried out in this paper. For this purpose, a 100KW, 1KV DAB prototype with input voltage of 800V and switching frequency of 10KHz has been proposed. The proposed converter was simulated and compiled in the Typhoon Hardware-In-Loop (HIL) software. Based on the obtained results, it was found that DPS control algorithm employed in DAB converter exhibited higher efficiency compared to conventional SPS control algorithm.