Power Quality Analysis of Distribution Transformer Connected in EV Charging Station

– With the growing adoption of electric vehicles (EVs), the need for extensive charging infrastructure has risen considerably. This growth has introduced new challenges for electric power distribution networks, particularly concerning power quality. EV chargers, especially fast-charging units, behave as non-linear loads that inject harmonic distortions and cause voltage instability. These distortions propagate through the network and adversely impact the distribution transformer by increasing thermal stress and reducing its operational life. This study explores the impact of EV charging stations on power quality, particularly disturbances at the transformer level. A simulation model developed in MATLAB/Simulink serves to study these impacts under various scenarios. Furthermore, the paper discusses effective mitigation strategies, emphasizing the integration of renewables and smart load management. 