Coordinated charging strategies for plug-in hybrid electric vehicles

Abstract

Electric Vehicles (EV) is a current buzz in the automotive industry. This new buzz has both negative as well as positive impacts on the power system. The increased number of electric vehicles, when acting as loads impose enormous power requirements on power grid and this leads to power imbalance and also weakens the stability of the grid. A careful selection of charging location and capacity of charging stations is the first step in planning the accommodation of large set of EVs. However this doesn't solve the problem fully and hence for day to day operations coordinated charging of EVs is essential. Hence stochastic behavior of EVs is analyzed and EV charging power is predicted. Further a two-stage model to reduce the loading peaks due to charging of PHEVs is developed using optimization and Demand Response (DR) strategies.