Overview
IEC TS 61970-556:2016 - "Energy management system application program interface (EMS-API) – Part 556: CIM based graphic exchange format (CIM/G)" - is a Technical Specification from IEC TC57 that defines a CIM-based graphic exchange format for power system diagrams. The document (Edition 1.0, 2016-09) specifies diagram and definition file structures, graphic element definitions and an XML-based format to enable both off‑line exchange of graphic displays and on‑line remote browsing of diagrams between distinct SCADA/EMS systems supplied by different vendors.
Key topics and requirements
- CIM-based graphic model (CIM/G): Graphics are mapped to the Common Information Model (CIM) so diagrams can reference domain objects consistently across systems.
- Diagram file structure and definition files: A clear XML structure is specified for diagram containers and reusable element definition files to ensure interoperable exchange.
- Graphic element definitions: Includes basic shapes and power-system-specific elements (breaker, bay, link, dynamic text, voltage level, substation, power grid, etc.) and rules for user‑defined elements and references.
- Runtime display mechanisms: Defines approaches for local runtime rendering and remote browsing (online) to meet near real‑time operational needs.
- Styling and visual conventions: Guidance for drawing attributes, color identification (e.g., by voltage level), and default object styles (informative annexes).
- Use cases and examples: Use case scenarios, sample diagram examples and menu definitions are provided to guide implementations.
- Normative references: Integration with IEC 61970-301 (CIM base), IEC 61970-453 (diagram layout profile) and IEC TS 61970-555 (efficient model exchange).
Applications and who uses it
- Utility system integrators and vendors building or integrating EMS/SCADA visualization, HMI and diagram repositories.
- Software developers implementing diagram exchange, common MMIs, or remote diagram browsing across multi‑vendor systems.
- Transmission and distribution operators seeking standardised off‑line diagram transfer, versioning, or online remote access to single‑line and substation diagrams.
- Consultants and standards engineers designing interoperable energy management and control-room graphics.
Related standards
- IEC 61970-301 - Common Information Model (CIM) base
- IEC 61970-453 - Diagram layout profile
- IEC TS 61970-555 - CIM based efficient model exchange format
Keywords: IEC TS 61970-556, CIM/G, CIM based graphic exchange format, EMS-API, SCADA/EMS, diagram file structure, graphic element definitions, remote browsing, XML diagram exchange.