IEC TS 62939-2:2018 PDF

Overview

IEC TS 62939-2:2018 - Smart grid user interface: Part 2: Architecture and requirements defines a reference architecture to enable information exchange between demand-side smart equipment/systems and the power grid. The Technical Specification focuses on interoperability between the IEC Common Information Model (CIM) and a range of customer‑facility standards (for example EEBus, KNX, ECHONET Lite, LonMark, BACnet). It proposes an immediately available three‑layer application approach to support demand response (DR) and other grid-interactive services while allowing future semantic consolidation toward two layers.

Key topics and technical requirements

• Reference architecture: conceptual models showing how non‑CIM/IEC 61850 demand‑side systems connect to CIM-based grid systems via adapters and bridges.
• Three‑layer structure: a pragmatic layering that separates customer‑side protocols, adapter logic (model mapping/data transformation), and CIM/utility interfaces.
• Adapter functions (PAB): model mapping, data transformation, service matching and protocol mapping to reconcile different information models.
• Message transmission requirements: guidance on reliable, secure exchange of DR and control messages between customer premises and service providers.
• Data transformation: rules and expectations for mapping customer facility data to CIM semantics, including the notion of CIM profiles to reduce complexity.
• Communication protocol mapping: approaches to connect diverse protocols used in homes and buildings with CIM-based utility systems.
• Monitoring and management: requirements for operational visibility, manageability and diagnostics of SGUI components.
• Security and interoperability focus: emphasises secure, bi‑directional, machine‑to‑machine SGUI interactions for grid-aware energy management and EV charging.

Applications

IEC TS 62939-2 is targeted at practical smart‑grid integration tasks:

• Enabling demand response programs that require asset control and telemetry from homes and buildings.
• Integrating distributed energy resources (DER), battery storage and EV charging into grid operation workflows.
• Building SGUI bridges/adapters for utility‑to‑customer communications where legacy or non‑CIM protocols are used.
• Providing a standardised approach for system integrators to reduce fragmentation in the smart home/building market.

Who should use this standard

• Utilities and distribution system operators (DSOs)
• Smart home and building automation vendors
• System integrators and ESB/adapter developers
• DER and EV charging infrastructure providers
• Standards developers and policymakers working on grid‑to‑customer interfaces

Related standards

• IEC 62939‑1 (Interface overview and country perspectives)
• IEC 62746‑10‑1 (SGUI bridge PAS) and IEC 62746‑10‑3
• IEC 61850 (substation/customer equipment models) and CIM (IEC TC57)

This Technical Specification provides a practical, interoperable architecture to bridge fragmented customer‑side ecosystems with CIM‑based grid systems, accelerating demand response and other smart‑grid applications.