Electrical Vehicle Charging Station Mathematical Modeling and Stability Analysis

Electric vehicle (EV) technology aims to make transportation more efficient and eco-friendly. The fact that it has little or no environmental impact has prompted most researchers to conduct current research. The charging end of the system is where most of the research is being done. Fast chargers, wireless chargers, and many different methodologies to fastly charge the batteries are under the scope of research. The behavior of EVs is different from the rest of the renewable resources synchronized with the grid. The bi-directional capability and the excess penetration of EVs in the power system will affect the grid network. Various studies and analyses have already been done on EVs. However, the modeling of the EV charging station is still under the scope of research, and efforts to increase the stability of the charging system are in progress. Considering all the parameters at the grid side makes the study much more complicated. Few approximations at the grid side can simplify the analysis, keeping the system stable. The impact of such a vast EV charging station soon cannot be ignored. A stable Electrical Vehicle charging station circuit and its mathematical model are proposed in this work. The proposed work has been achieved by applying DQ analysis on the three-phase converter at the grid side and is represented along with its state-space model using the equivalent circuit.