EN IEC 61970-302:2024
(Main)Energy management system application program interface (EMS-API) - Part 302: Common information model (CIM) dynamics
General Information
- Abstract
IEC 61970-302:2024 specifies a Dynamics package which contains part of the CIM to support the exchange of models between software applications that perform analysis of the steady-state stability (small-signal stability) or transient stability of a power system as defined by IEEE / CIGRE, Definition and classification of power system stability IEEE/CIGRE joint task force on stability terms and definitions. The model descriptions in this document provide specifications for each type of dynamic model as well as the information that needs to be included in dynamic case exchanges between planning/study applications. The scope of the CIM Dynamics package specified in this document includes: • standard models: a simplified approach to describing dynamic models, where models representing dynamic behaviour of elements of the power system are contained in predefined libraries of classes which are interconnected in a standard manner. Only the names of the selected elements of the models along with their attributes are needed to describe dynamic behaviour. • proprietary user-defined models: an approach providing users the ability to define the parameters of a dynamic behaviour model representing a vendor or user proprietary device where an explicit description of the model is not provided by this document. The same libraries and standard interconnections are used for both proprietary user-defined models and standard models. The behavioural details of the model are not documented in this document, only the model parameters. • A model to enable exchange of models’ descriptions. This approach can be used to describe user defined and standard models. • A model to enable exchange of simulation results. This second edition cancels and replaces the first edition published in 2018. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) The majority of issues detected in IEC 61970-302:2018 are addressed; b) IEEE 421.5-2016 on Excitation systems is fully covered; c) The IEEE turbine report from 2013 was considered and as a result a number of gas, steam and hydro turbines/governors are added; d) IEC 61400-27-1:2020 on wind turbines is fully incorporated; e) WECC Inverter-Based Resource (IBR) models, Hybrid STATCOM models and storage models are added; f) The user defined models are enhanced with a model which enables modelling of detailed dynamic model; g) A model to enable exchange of simulation results is added; h) The work on the HVDC models is not complete. The HVDC dynamics models are a complex domain in which there are no models that are approved or widely recognised on international level, i.e. there are only project-based models. At this stage IEC 61970-302:2022 only specifies some general classes. However, it is recognised that better coverage of HVDC will require a further edition of this document; i) Models from IEEE 1547-2018 "IEEE Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces" are added. j) Statements have been added to certain figures, tables, schemas, and enumerations throughout the document that indicate that they are reproduced with the permission of the UCA International User Group (UCAIug). These items are derived from the CIM.
- Status
- Published
- Publication Date
- 14-Mar-2024
- Technical Committee
- CLC/TC 57 - Power systems management and associated information exchange
- Drafting Committee
- IEC/TC 57 - IEC_TC_57
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 05-Jan-2026
- Completion Date
- 08-Sep-2026
Overview - EN IEC 61970-302:2024 (EMS-API, CIM Dynamics)
EN IEC 61970-302:2024 defines the CIM Dynamics package for the Energy Management System Application Program Interface (EMS‑API). It standardizes exchange formats and model descriptions used to represent dynamic behaviour of power system components for small‑signal (steady‑state) and transient stability studies. This second edition (2024) replaces the 2018 edition and expands coverage for modern devices and simulation result exchange.
Key topics and technical requirements
- Dynamics package content: Class libraries and interconnections that represent dynamic models (rotating machines, governors, excitation systems, stabilizers, wind and inverter controls, storage, power electronics, etc.).
- Standard models vs. user‑defined models:
- Standard models - predefined classes with known interconnections; model behaviour is referenced by model names and attributes.
- Proprietary / user‑defined models - parameter lists for vendor-specific models where internal behavioural equations are not specified in the document.
- Detailed model descriptions - a mechanism to include explicit model definitions when required.
- Simulation results exchange: New package enabling standardized exchange of simulation output and events (signal recorders, parameter changes, etc.).
- Coverage updates: Incorporates IEEE 421.5 (excitation systems), IEC 61400‑27‑1 (wind turbines), WECC IBR and storage models, IEEE 1547 elements, and additional turbine/governor models. HVDC dynamics are partially specified (general classes only).
- Interoperability notes: Includes references and reproduced items from the UCA International User Group (UCAIug) and aligns with CIM conventions for EMS-API integration.
Practical applications
- Exchanging dynamic model cases between planning and study tools (power system simulation, transient stability analysis, small-signal stability).
- Ensuring interoperability between EMS vendors, simulation software, OEM proprietary models and utility planning tools.
- Standardizing storage, inverter-based resource (IBR), wind turbine, and generator dynamic data for grid integration studies.
- Archiving and sharing simulation results for analysis, validation, or regulatory reporting.
Who should use this standard
- Power system planning engineers and stability analysts
- EMS and SCADA vendors implementing CIM-based interfaces
- Simulation software developers (transient and small-signal solvers)
- OEMs and vendors supplying proprietary dynamic models
- System operators, utilities, consultants, and researchers working on grid stability and integration studies
Related standards
- IEC 61970‑301 (CIM base)
- IEC 61970‑501
- IEC 61400‑27‑1 (wind turbine models)
- IEEE 421.5 (excitation systems)
- IEEE 1547 (DER interconnection)
- WECC model specifications and UCAIug CIM resources
For implementation and official text, obtain EN IEC 61970‑302:2024 from CENELEC/IEC authorized distributors.
Relations
- Effective Date
- 27-Apr-2021
- Refers
IEC 60050-351:2013 - International Electrotechnical Vocabulary (IEV) - Part 351: Control technology - Effective Date
- 20-Feb-2026
- Effective Date
- 20-Feb-2026
- Refers
IEC 60050-851:2008 - International Electrotechnical Vocabulary (IEV) - Part 851: Electric welding - Effective Date
- 20-Feb-2026
- Effective Date
- 20-Feb-2026
- Effective Date
- 20-Feb-2026
- Refers
IEC 60050-551:1998 - International Electrotechnical Vocabulary (IEV) - Part 551: Power electronics - Effective Date
- 20-Feb-2026
- Effective Date
- 20-Feb-2026
- Effective Date
- 20-Feb-2026
- Refers
IEC 60050-192:2015 - International Electrotechnical Vocabulary (IEV) - Part 192: Dependability - Effective Date
- 20-Feb-2026
- Effective Date
- 10-Feb-2026
- Effective Date
- 10-Feb-2026
- Effective Date
- 10-Feb-2026
- Effective Date
- 10-Feb-2026
- Effective Date
- 10-Feb-2026
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Frequently Asked Questions
EN IEC 61970-302:2024 is a standard published by CLC. Its full title is "Energy management system application program interface (EMS-API) - Part 302: Common information model (CIM) dynamics". This standard covers: IEC 61970-302:2024 specifies a Dynamics package which contains part of the CIM to support the exchange of models between software applications that perform analysis of the steady-state stability (small-signal stability) or transient stability of a power system as defined by IEEE / CIGRE, Definition and classification of power system stability IEEE/CIGRE joint task force on stability terms and definitions. The model descriptions in this document provide specifications for each type of dynamic model as well as the information that needs to be included in dynamic case exchanges between planning/study applications. The scope of the CIM Dynamics package specified in this document includes: • standard models: a simplified approach to describing dynamic models, where models representing dynamic behaviour of elements of the power system are contained in predefined libraries of classes which are interconnected in a standard manner. Only the names of the selected elements of the models along with their attributes are needed to describe dynamic behaviour. • proprietary user-defined models: an approach providing users the ability to define the parameters of a dynamic behaviour model representing a vendor or user proprietary device where an explicit description of the model is not provided by this document. The same libraries and standard interconnections are used for both proprietary user-defined models and standard models. The behavioural details of the model are not documented in this document, only the model parameters. • A model to enable exchange of models’ descriptions. This approach can be used to describe user defined and standard models. • A model to enable exchange of simulation results. This second edition cancels and replaces the first edition published in 2018. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) The majority of issues detected in IEC 61970-302:2018 are addressed; b) IEEE 421.5-2016 on Excitation systems is fully covered; c) The IEEE turbine report from 2013 was considered and as a result a number of gas, steam and hydro turbines/governors are added; d) IEC 61400-27-1:2020 on wind turbines is fully incorporated; e) WECC Inverter-Based Resource (IBR) models, Hybrid STATCOM models and storage models are added; f) The user defined models are enhanced with a model which enables modelling of detailed dynamic model; g) A model to enable exchange of simulation results is added; h) The work on the HVDC models is not complete. The HVDC dynamics models are a complex domain in which there are no models that are approved or widely recognised on international level, i.e. there are only project-based models. At this stage IEC 61970-302:2022 only specifies some general classes. However, it is recognised that better coverage of HVDC will require a further edition of this document; i) Models from IEEE 1547-2018 "IEEE Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces" are added. j) Statements have been added to certain figures, tables, schemas, and enumerations throughout the document that indicate that they are reproduced with the permission of the UCA International User Group (UCAIug). These items are derived from the CIM.
IEC 61970-302:2024 specifies a Dynamics package which contains part of the CIM to support the exchange of models between software applications that perform analysis of the steady-state stability (small-signal stability) or transient stability of a power system as defined by IEEE / CIGRE, Definition and classification of power system stability IEEE/CIGRE joint task force on stability terms and definitions. The model descriptions in this document provide specifications for each type of dynamic model as well as the information that needs to be included in dynamic case exchanges between planning/study applications. The scope of the CIM Dynamics package specified in this document includes: • standard models: a simplified approach to describing dynamic models, where models representing dynamic behaviour of elements of the power system are contained in predefined libraries of classes which are interconnected in a standard manner. Only the names of the selected elements of the models along with their attributes are needed to describe dynamic behaviour. • proprietary user-defined models: an approach providing users the ability to define the parameters of a dynamic behaviour model representing a vendor or user proprietary device where an explicit description of the model is not provided by this document. The same libraries and standard interconnections are used for both proprietary user-defined models and standard models. The behavioural details of the model are not documented in this document, only the model parameters. • A model to enable exchange of models’ descriptions. This approach can be used to describe user defined and standard models. • A model to enable exchange of simulation results. This second edition cancels and replaces the first edition published in 2018. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) The majority of issues detected in IEC 61970-302:2018 are addressed; b) IEEE 421.5-2016 on Excitation systems is fully covered; c) The IEEE turbine report from 2013 was considered and as a result a number of gas, steam and hydro turbines/governors are added; d) IEC 61400-27-1:2020 on wind turbines is fully incorporated; e) WECC Inverter-Based Resource (IBR) models, Hybrid STATCOM models and storage models are added; f) The user defined models are enhanced with a model which enables modelling of detailed dynamic model; g) A model to enable exchange of simulation results is added; h) The work on the HVDC models is not complete. The HVDC dynamics models are a complex domain in which there are no models that are approved or widely recognised on international level, i.e. there are only project-based models. At this stage IEC 61970-302:2022 only specifies some general classes. However, it is recognised that better coverage of HVDC will require a further edition of this document; i) Models from IEEE 1547-2018 "IEEE Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces" are added. j) Statements have been added to certain figures, tables, schemas, and enumerations throughout the document that indicate that they are reproduced with the permission of the UCA International User Group (UCAIug). These items are derived from the CIM.
EN IEC 61970-302:2024 is classified under the following ICS (International Classification for Standards) categories: 33.200 - Telecontrol. Telemetering. The ICS classification helps identify the subject area and facilitates finding related standards.
EN IEC 61970-302:2024 has the following relationships with other standards: It is inter standard links to EN IEC 61970-302:2018, IEC 60050-351:2013, IEC 60050-471:2007, IEC 60050-851:2008, IEC 60050-581:2008, IEC 60050-713:1998, IEC 60050-551:1998, IEC 60050-802:2011, IEC 60050-806:1996, IEC 60050-192:2015, IEC 60050-732:2010, IEC 60050-113:2011, IEC 60050-112:2010, IEC 60050-841:2004, IEC 60050-904:2014. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN IEC 61970-302:2024 is associated with the following European legislation: Standardization Mandates: M/490. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN IEC 61970-302:2024 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.