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Transitioning charging stations to smart grid nodes

A comparison of current communication standards; Whitepaper
: Nauck, Enrico

Fulltext urn:nbn:de:0011-n-3241132 (1.4 MByte PDF)
MD5 Fingerprint: d6e537c4f91d20797512b7988e646a91
Created on: 4.2.2015

München: Fraunhofer ESK, 2014, 21 pp.
Study, Electronic Publication
Fraunhofer ESK ()
electromobility; electric vehicle; renewable energy; communication technology; charging infrastructure; communication; vehicle; Charging Station; smart grid; standard; communication standard; Reliable Ethernet and IP Communication; energy technology; Zuverlässige Ethernet IP Kommunikation

The process of charging an electric car should involve more than just plugging a cable into an outlet. Charging needs to be convenient and cost-effective for the driver, as well as manageable and efficient for the energy provider, especially to ensure the stability of the electricity network given the growth of renewable energy sources. This goal is achievable only with an intelligent charging infrastructure, or one that is integrated in the power grid from a communications standpoint. Before electromobility can become established, e-vehicles, drivers, energy suppliers, grid operators and to some extent other parties such as billing service providers, must be able to interact with one another. Charging stations should be usable regardless of the manufacturer or location, reservable while travelling and be able to automatically carry out the charging process in accordance with pre-defined user settings. To reduce the load on the electricity network, energy providers need real-time information about the local short- and medium-term energy demand. They also need the ability to manage the charging process when required. For this reason, several factors play a key role in selecting the communication technology. Apart from the basic security aspects, this includes interoperability, the ability to exchange an extensive amount of data in a secure manner before, during and after charging, and efficient integration into the overall system, taking into account the costs and ease of use. This is something that only a uniform charging infrastructure with communication technology based on international standards can provide. Fraunhofer ESK researchers examined the potential standards and produced a white paper that summarizes the most important characteristics of a sustainable charging infrastructure. Using this detailed technology evaluation as a foundation, and by relying on ISO/IEC 15118 for the vehicle-to-charging station communication and IEC TR 61850-90-8 for the charging station-to-smart grid communication, Fraunhofer ESK designed an intelligent charging infrastructure that can be seamlessly integrated into the smart grid. The concept is outlined in the following white paper.