Analysis of electric vehicle charging impact on grid voltage regulation

As adoption of electric vehicles increases exponentially globally, there is a need for continuous relevant research in the area of the impacts of charging infrastructure integration on the grid. One of such impacts is voltage regulation. This paper develops a practical time-varying electric vehicle load model as opposed to the state-of-the-art static constant load model and simulates the impact of electric vehicles on the grid hourly, rather than daily, placed at selected nodes in the system. It is observed that as electrical distance of a charging node to the feeder increases, the occurrence of prolonged voltage drop increases. This is relevant for utility planners and industry to ascertain the hourly number of electric vehicles that can be charged in a cluster without violating the statutory voltage regulation requirement.