Interoperability Testing Based on TTCN-3 for V2G Communication Interfaces

A future widespread use of electric vehicles requires the deployment of reliable and comprehensive battery charging infrastructures. The communication between all systems, which are involved in order to control the battery charging processes or enable flexible billing of charging operations, becomes an important factor in acceptance of electric mobility. It will be a highly distributed infrastructure in a multi-vendor, multi-network and multi-service environment with spatially separated and partially mobile components. The challenge is to ensure interoperability of such systems, consisting of different charge point operators, electrical grid components and multitude electric vehicles, through standardized data structures and reliable communication protocols. This paper describes an approach for protocol-aware interoperability testing of standardized Vehicle to Grid (V2G) communication interfaces based on a TTCN-3 testing infrastructure. This approach allows to evaluate the interoperability of such communication systems with appropriate testing methods and to build an experimental Automatic Test Equipment.