IEC 61970-457:2021

Overview

IEC 61970-457:2021 - Energy management system application program interface (EMS‑API) Part 457: Dynamics profile - specifies a standardized interface and schema for exchanging the dynamic model information needed to perform steady‑state stability (small‑signal) and transient stability studies of power systems. The dynamics profile schemas are derived from the Common Information Model for dynamics (CIM Dynamics) defined in IEC 61970-302, and are intended to be used together with static network and solved state profiles to form a complete dynamics model exchange.

Key topics and requirements

• Scope of exchange: type, description and parameter values for control equipment associated with power system assets included in a solved steady‑state network model.
• Derived from CIM: data structures and semantics are directly based on IEC 61970-302 (CIM for dynamics) so that function block diagrams and model interconnections are consistent across tools.
• Profile dependencies: exchanges are dependent on static equipment and solved state profiles as specified in IEC 61970-452 (static transmission network profiles) and IEC 61970-456 (Solved power system state profiles).
• Supported model types:
  • Standard models - reference model names from predefined libraries with required attribute lists (simplified exchange of known model types).
  • Proprietary / user‑defined models - parameter exchange for vendor‑specific models where behavioral descriptions are provided separately by the sender.
• Implementation guidance: model definitions (function blocks and interconnections) are assumed pre‑stored in applications; the standard focuses on exchanging identification and parameterization rather than re‑defining model internals. The standard includes class diagrams, interconnection figures and implementation clarifications (including serialization examples in IEC 61970‑552).

Applications and who uses it

This profile is essential for:

• Power system planners, utilities and transmission operators performing transient and small‑signal stability studies.
• Software vendors and EMS/SCADA integrators needing consistent exchanges of dynamics data between tools (simulators, EMS, planning suites).
• OEMs and equipment vendors distributing model parameter sets or proprietary model parameters to customers and consultants.
• Consultants and researchers who combine solved network states with dynamic control equipment parameters for simulations.

Practical uses include model hand‑off for dynamic studies, vendor model parameter exchange, multi‑tool co‑simulation and validating transient stability scenarios.

Related standards

• IEC 61970-302 - CIM for dynamics (model definitions and function block diagrams)
• IEC 61970-452 - CIM static transmission network model profiles
• IEC 61970-456 - Solved power system state profiles (steady‑state solution & topology)
• IEC 61970-552 - Serialization examples referenced in the dynamics profile

Keywords: IEC 61970-457, EMS-API dynamics profile, CIM dynamics, transient stability, small-signal stability, dynamic model exchange, power system dynamics.