Data communication and grid quality on charging interface
Netzintegration der Elektromobilität
1. Internationale ATZ-Fachtagung
Information and communication technology / Informations- und Kommunikationstechnologie (KIT)
Referent(in): Ursel Willrett, IAV GmbH
The charging interface between grid and electric vehicles is new. Energy and automotive industry have to cooperate for a successful introduction of e-mobility. There are plenty of challenges to be solved to provide a proper cooperation of these ‘two worlds’. Basic mean to implement the necessary functions and applications is the charging communication. Important requirements for charging in public areas are authentication, billing, e-roaming. From the view of the energy provider integration of e-mobility into smart grid is important, which includes effective dynamic load management and the use of the HV-batteries in the vehicles to store and feedback energy.
Two challenges for the integration of electric vehicles into the grid are data communication and grid quality on the charging interface are presented in this document.
The communication on the charging interface between electric vehicle and charging station is specified in ISO / IEC 15118 (power line communication). Data security is required because of the transmission of personal data which have to be protected. Electric vehicles become a part of a huge system ‘e-mobility’. Further applications and system solutions can be implemented, i. e. applications for intelligent mobility, traffic control, integration into smart grid with various applications or value added services for users.
Electric consumers (i. e. electric vehicles) need on the one hand a stable power supply, they expect grid quality according to
the given standards. Otherwise every consumer adds distortion or noise into the grid. Today only few electric vehicles exist.
Measurements show that already one single electric vehicle causes visible perturbations (i. e. harmonics, power factor) during charging. Predictions of distortions for many electric vehicles cannot be determined. Therefore the distortions caused by electric vehicles have to be observed by frequent measurements and analysis. The results can be used for improvements of the compensation circuits of the AC / DC converters use in on-board chargers (AC charging) or in charging stations (DC charging).
Acceptance of e-mobility by users is key for market success. E-mobility has to be easy to use and transparent. The users want to charge everywhere and expect security for their personal data.
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