Optimization Methods for Evaluating PEV Charging Considering Customer Behavior

Plug-in electric vehicles (PEVs) can be connected to the power grid through electric vehicle supply equipment (EVSE) to provide various grid services in addition to battery charging. This paper evaluates the loading condition of a distribution system with a medium penetration of PEVs considering different charging behaviors and different levels of public EVSE availability. A mobility and charging flexibility model is proposed to capture the temporal availability of PEVs and the charging capability at different parking locations. An optimization method is then proposed to evaluate or schedule PEV load under different charging control strategies. One of the prototypical feeders developed by the Pacific Northwest National Laboratory is studied using detailed trip information extracted from the National Household Travel Survey.