Poster: Electric Vehicle Network Bidirectional Charging for Flexible Vehicle-to-Grid Services

For flexible vehicle-to-grid (V2G) supports with a large scale electric vehicle (EV) network, a novel charging scheme is proposed in this study with a bidirectional constant-rate charging coordination (BCCC). Clustering EVs and coordinating their charging profiles have significant impact on overall V2G benefits however it is difficult to solve in general due to the uncertainty in EVs' mobility. In the proposed scheme, minimizing the operation cost for EVs or EV charging stations can be formulated by the binary integer linear programming (ILP) by fixing the charging and discharging rates. BCCC also provides simple estimation of the battery wear cost from V2G supports, to inform the net benefit to EV owners. In numerical simulations for a residential complex charging station, 50 EVs are jointly coordinated to minimize the net charging costs, where BCCC provides similar to 50$/day benefit over the uncoordinated first-come first-serve (FCFS) strategy.