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Abstract-This paper presents a novel method of planning the charging of electric-drive vehicles that takes electricity grid constraints into account. The method computes an individual charging plan for each vehicle while minimizing the cost of electricity, avoiding distribution grid congestion, and satisfying the individual vehicle owner's requirements. The underlying algorithm is explained through a simple example and tested on a simulated electricity grid. The method is shown to significantly reduce the overloading in the electricity grid compared to charging schemes that do not consider grid constraints.

Abstract-The Danish EDISON project has been launched to investigate how a large fleet of electric vehicles (EVs) can be integrated in a way that supports the electric grid while benefitting both the individual car owners and society as a whole through reductions in CO2 emissions. The consortium partners include energy companies, technology suppliers and research laboratories and institutes. The aim is to perform a thorough investigation of the challenges and opportunities of EVs and then to deliver a technical platform that can be demonstrated on the Danish island of Bornholm. To reach this goal, a vast amount of research is done in various areas of EV technology by the partners. This paper will focus on the ICT-based distributed software integration, which plays a major role for the success of EDISON. Key solution technologies and standards that will accommodate communication and optimize the coordination of EVs will be described as well as the simulation work that will help to reach the goals of the project.

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