In this paper, an electric vehicle fast charging station based on the common DC bus architecture is studied. In this architecture, a 2-level AC-DC VSC followed by a DC-DC converter is utilized. Two different control strategies for the VSC are employed and compared under steady-state and dynamic conditions. The two different control strategies are the dq-SRF and UTC control strategies. The two strategies are compared in terms of the following variables: Input voltage, Input current, stability, THD_v, and THD_i. It is found that the UTC strategy is more robust, stable, and has lesser impact on THD_v and THD_i. The settling time of UTC is also faster than the dq-SRF control strategy. Different transformer configurations are also compared to study the impacts on PCC. The star-delta configuration of the transformer is found to be better than other configurations in terms of power quality.
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