Corporate Research & Development Center

New IEC 62656-3 Standard for DB Maintenance of CIM Used in Smart Grids

TOSHIBA REVIEW SCIENCE AND TECHNOLOGY HIGHLIGHTS 2014

The Common Information Model (CIM) defined in the IEC (International Electrotechnical Commission) 61970/61968 series of standards is used to exchange data and information among electric energy systems. However, the current CIM defined in the Unified Modeling Language (UML) has issues of data compatibility and sustainable model maintenance in a DB.

In order to improve the weaknesses of the CIM UML model, Toshiba has proposed the IEC 62656-3 standard, which defines an interface between the CIM and the tabular modeling methodology of IEC 62656. In IEC 62656-3, transformation rules between the metamodels of IEC 62656 and the CIM UML are defined. This standard makes it possible to derive a CIM in a tabular format called "Parcellized CIM" from a CIM UML model. Parcellized CIM has the following advantages:

  • Each entity can be identified with a globally unique identifier (ID), including a version number, so that version management of each entity defined in the CIM model can be implemented. The version control mechanism of IEC 62656 ensures data compatibility among different versions of CIM models.
  • Online model maintenance of the CIM through the IEC Common Data Dictionary (CDD) (http://std.iec.ch/iec61360) can be easily realized with the IEC 62656 format of Parcellized CIM. Additionally, the CIM can be complemented by other domain ontologies available in the IEC CDD. IEC 62656-3 has been submitted to IEC for FDIS circulation as of April 2014.

Mapping between metamodels of CIM UML and IEC 62656

Mapping between metamodels of CIM UML and IEC 62656

FDIS: Final Draft for International Standard