A Study for the Message Exchange of the EVSE Communication Controller using XML Schema Transformation

An EVSE and the EV exchange XML formatted communication messages with each other, whose structure is described by the V2G CI schema in the ISO/IEC 15118 international standard, and the EVSE and the power grid exchange messages based on SCL file with each other, whose structure is described by SCL schema in the IEC 61850 international standard. Because XML files can be restructured by XSLT, V2G messages can be transformed to/from SCL files using XSLT. In this study, the two schemas are analyzed and compared in order for the restructuring of the two differently structured XML instances. As a result, two XSL scripts can be produced for the transformation between XML files conforming ISO/IEC 15118 V2G CI schema and IEC 61850 SCL schema respectively to avoid manual data mapping which can happen in every application development cases.