Project 2022-04 EMT Modeling

​​​​​Related Files​

The comment and nomination period for the Project 2022-04 EMT Modeling Standard Authorization Request (SAR)​​ concluded at 8 p.m. Eastern, Tuesday, September 13, 2022. ​

​The bulk power system (BPS) in North America is undergoing a rapid transformation towards high penetrations of inverter‐based resources. Transmission Planners (TP) and Planning Coordinators (PC) are concerned about the lack of accurate modeling data and the need to perform electromagnetic transient (EMT) studies during the interconnection process and long‐term planning horizon. The growth of inverter technology has pushed conventional planning tools to their limits in many ways, and TPs and PCs are now faced with the need to conduct more detailed studies using EMT models for issues related to inverter-based resource integration issues.

This SAR proposes including EMT models and studies in planning-related NERC Standards to ensure reliable operation of the BPS moving forward.

Standard(s) Affected: FAC-002, MOD-032, and TPL-001

Purpose/Industry Need
This project addresse​s the reliability‐related need and benefit by ensuring TPs and PCs have the models and tools necessary to adequately conduct reliability assessments under increasing levels of inverter‐based resources. This requires the collection of EMT models by applicable entities and TPs and PCs to conduct EMT studies where needed.

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DraftActionsDatesResultsConsideration of Comments
Standard Authorization Request
Clean | Redline​​
The SC accepted the SAR on July 19, 2023​

Drafting Team Nominations

Supporting Materials

Unofficial Nomination Form (Word) ​

Nomination Period


Submit Nominations​​

08/11/2022 – 09/13/2022

Comment Period


Submit Comments​

​8/11/2022 – 09/13/2022

​Comments Received​​

Consideration of Comments​