Modelling and system impact of large-scale electric vehicles charging at the medium voltage transmission system

The rapid increment of electrical vehicles along with faster charging capabilities impact the transmission of electric power in the National grid. It increases the power demand, causes voltage disturbances, line overloading, imbalance in power systems, higher power losses, transients, and causes larger current flow in the grid at the specific time intervals. This reduces the power quality in the grid and causes significant impact on lifespan of the electric power equipment. While most existing studies focus on low-voltage distribution networks, the impacts of large-scale electric vehicles integration on medium-voltage power networks remain insufficiently explored. This paper analyses the power flow on the 132KV medium voltage transmission systems due to increment in electric vehicles charging at the faster rate. It analyses the voltage quality and harmonics effects on the grid. The research is carried out on the MATLAB/SIMULINK and mathematical modelling.