Coordination of EV fleet charging with distributed generation to reduce constraints on distribution networks

Objectives for CO2 reduction as well as a more and more expensive gasoline have given a new breath to the plug-in vehicles (electric or hybrid). From an energetic point of view, the issue is then transferred from oil industry to the electrical power system sector. With this possible new demand, the question is then: will the power systems be able to accept the demand of several millions of vehicles, and how the power system control should be modified? Plug-in vehicles will be charge from the low voltage distribution network. Then their impact on the network is a critical issue to ensure the system security. The small storage devices brought by vehicles could be more a real opportunity than a constraint for distribution networks as vehicles could help reducing overload, voltage fluctuations observed with renewable sources. In this paper we present how plug-in vehicles charges can be managed to reduce the constraints on distribution networks. We propose controlled charging strategies to charge EVs when photovoltaic or wind generation feed power into the grid. Financial issues will also be discussed about sharing benefits between actors.