Abstract
High penetration of variable sources of renewable power generation will lead to operational difficulties of supply-demand balancing of an entire power system. The mass deployment of electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs) will also cause significant changes in electricity demand. Therefore, controlling and managing the charging time of EVs/PHEVs are effective and imperative for improvement of the balancing in the power system operation. We assumed trip patterns of EVs in a model of the future Tokyo power system and analyzed the power system loads, including the charging load of EVs, assuming several charging control scenarios. It was verified that charging-time controls are substantially effective to reduce the fuel costs of the power system. Further, we found that load leveling by multi-car charging management scenario indicated the best results in terms of the fuel cost in all cases.
