IEC 61970-457:2024

Overview

IEC 61970-457:2024 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies a standardized interface for exchanging dynamic model information relevant to power system stability analysis. This edition updates and replaces the 2021 version, incorporating advances in dynamic modeling and expanding to cover new equipment types and models. It builds upon the Common Information Model (CIM) described in IEC 61970-302, focusing particularly on dynamics required for steady-state stability (small-signal) and transient stability analyses of power systems.

The standard defines the Dynamics Profile within the Energy Management System Application Program Interface (EMS-API) framework to enable consistent, interoperable data exchange among power system analysis tools, operators, and equipment vendors.

Key Topics

• Scope of Dynamic Model Exchange
  IEC 61970-457:2024 targets dynamic model information necessary for transient and steady-state stability studies, including types, descriptions, and parameters of control equipment linked to power system components. It complements static network models and steady-state solutions specified in IEC 61970-452 and IEC 61970-456.

• Model Types Supported

  • Standard Models: Utilizes predefined dynamic model libraries with standardized class representations for power system components. Only model names and parameters are exchanged, assuming behavioral logic is pre-stored in software applications.
  • Proprietary/User-Defined Models: Enables exchange of parameters for vendor-specific or user-defined models without explicit behavioral descriptions, requiring direct communication between sender and recipient for full interpretation.

• Expanded Coverage of Dynamic Elements
  The 2024 edition incorporates additional dynamic models reflecting modern power system components:

  • IEEE 421.5-2016 excitation systems
  • Gas, steam, and hydro turbines/governors per IEEE 2013 turbine report
  • IEC 61400-27-1:2020 compliant wind turbine models
  • WECC inverter-based resource (IBR) models, hybrid STATCOMs, and storage systems

• New Profiles Introduced

  • Detailed Model Configuration and Parameterisation Profiles: For more detailed and complex dynamic model exchange.
  • Simulation Settings and Results Profiles: Enhances capabilities for exchanging simulation scenarios and outcomes.

• Integration with CIM Standards
  The standard utilizes CIM classes and structures from IEC 61970-302 to define dynamic behavior and interconnections, ensuring consistency and compatibility with established power system modeling frameworks.

Applications

• Power System Stability Analysis
  Facilitates the exchange of dynamic data among utilities, transmission system operators, software vendors, and consulting engineers for small-signal and transient stability assessments. Enables enhanced coordination in contingency and disturbance studies.

• Interoperability of EMS and Simulation Tools
  Supports seamless integration and data sharing between Energy Management Systems (EMS), dynamic simulation software, and control platforms, improving accuracy and efficiency in operational planning and real-time decision-making.

• Vendor Model Exchange and Validation
  Allows utility and vendor collaboration in exchanging proprietary dynamic models while maintaining confidentiality of proprietary algorithm details, enabling validation and interoperability testing.

• Support for Renewable and Emerging Technologies
  Incorporates dynamic models for wind power plants, inverter-based resources, hybrid compensation devices, and energy storage systems essential for modern grid stability analyses.

Related Standards

• IEC 61970-302: CIM for Dynamics
  Defines the Common Information Model entities and relationships specifically for dynamic models in power systems, serving as the basis for data representation in IEC 61970-457.

• IEC 61970-452: CIM Static Transmission Network Model Profiles
  Specifies static transmission network models required for representing the network topology and equipment included in dynamic studies.

• IEC 61970-456: Solved Power System State Profiles
  Details the steady-state solution and topology profiles needed to bound the dynamic model information exchange.

• IEEE Standards

  • IEEE 421.5-2016: Excitation system models standard, fully integrated in this edition of IEC 61970-457.
  • IEEE turbine reports guiding representation of turbine-governors and mechanical dynamics.

• IEC 61400-27-1:2020
  Defines wind turbine models incorporated into this standard’s dynamic profiles to address renewable integration.

Keywords: IEC 61970-457, EMS-API, Dynamics profile, power system stability, transient stability, small-signal stability, dynamic model exchange, Common Information Model CIM, dynamic simulation, renewable integration, inverter-based resources, excitation systems, turbine governors, wind turbine models, energy management systems, transient analysis tools.