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ERCOT NOGRR-245 Compliance: DocuSign Template and Ride-Through Capability Review

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April 13, 2025 | Blog

ERCOT NOGRR-245 Compliance: DocuSign Template and Ride-Through Capability Review

Overview: As part of ERCOT’s continuing effort to ensure grid stability and the integration of inverter-based resources (IBRs), the NOGRR-245 compliance initiative has introduced a detailed DocuSign-based template to standardize and document each resource’s ride-through capabilities—both for frequency and voltage events. This article provides a breakdown of the workshop’s focus areas, including key compliance requirements, certification attestations, and documentation expectations.


Frequency Ride-Through Capability

ERCOT requires that all IBRs maximize their frequency ride-through capability to the fullest extent possible. This includes:

  • Updating software, firmware, settings, and parameterization.
  • Reporting changes made and the date of implementation.
  • Attesting whether further physical equipment modifications were made.
  • Submission of a frequency ride-through curve (0–600 seconds) to demonstrate compliance with Nodal Operating Guide (NOG) Section 2.6.2.1.

Operators must also confirm their ability to meet the minimum ride-through standards in effect as of May 1, 2024, and submit an Initial Frequency Ride-Through Capability Report if they fall short.


Voltage Ride-Through Capability

Similar to frequency, the voltage ride-through requirement compels resources to optimize software and equipment settings. Operators must:

  • Certify that their settings are maximized.
  • Submit voltage ride-through capability curves, including overvoltage behavior for IEEE 2800-2022-compliant resources.
  • Confirm their compliance with NOG Sections 2.9.1.1 and 2.9.1.2, or submit the Initial Voltage Ride-Through Capability Report.

Technical validations also include evaluations of phase angle jumps, over-voltage protection time delays, and whether rate-of-change measurements could trigger a trip.


IEEE 2800-2022 Performance Standards

Resources must meet the performance expectations outlined in IEEE 2800-2022 Sections 5, 7, and 9, including:

  • Injection of negative-sequence current for unbalanced faults.
  • Current blocking behavior, with mandated restart timelines of ≤5 cycles.
  • Ride-through performance during ROCOF (Rate of Change of Frequency) and phase angle jump events.
  • Documentation of consecutive voltage deviation capabilities.

Frequently Asked Questions (FAQ)

I. Applicability & Scope

  • Does NOGRR245 apply to Type 3 wind projects undergoing repower?

    Yes. Type 3 WGRs are considered inverter-based resources (IBRs). If modifications under Planning Guide Sec. 5.2.1(1)(c) are fully implemented by 1/1/2028, they only need to meet NOG 2.9.1.2 VRT requirements but must still maximize capability. If not completed by 1/1/2028, NOG 2.9.1.1 applies.

  • Does NOGRR245 apply to my solar PV project (Type 1 IBR)?

    Yes. Type 1 PV projects are considered IBRs under ERCOT’s definitions and are subject to the same requirements.

  • What is the difference between Type 1, 2, and 3 WGRs?

    • Type 1: Directly-connected induction generators (not IBRs)
    • Type 2: Induction generators with external resistance (not IBRs)
    • Type 3: Doubly fed induction generators (considered IBRs)
  • What Resources are subject to NOGRR245?

    All IBRs, Type 1 and Type 2 WGRs, regardless of SGIA date, must comply with the relevant sections of the NOG and IEEE 2800-2022, and maximize performance consistent with Good Utility Practice.


II. Model Requirements & Testing

  • When must models be updated to reflect NOGRR245 requirements?

    Updates submitted after 10/1/2024 must include model quality tests per DWG Procedure Manual Section 3.1.5.

  • What tests or simulations are required to demonstrate compliance?

    While ERCOT does not require specific simulations for every requirement, submitted models must accurately reflect actual or anticipated plant performance. Simulation-based validations are recommended but not strictly mandated.

  • What models must be submitted by 4/1/2025 if filing IFRTCR or IVRTCR?

    Pre- and post-maximization versions of PSSE, TSAT, and PSCAD (if applicable). PSCAD is not required unless it was previously mandated.

  • Do balance-of-plant relays need to be modeled?

    Yes, if they affect ride-through performance during system disturbances.


III. Compliance Deadlines & Extensions

  • What is due by April 1, 2025?

    • Submit IFRTCR or IVRTCR if your Resource cannot meet the respective NOG requirements by 12/31/25.

    • Request extensions or exemptions as needed per Section 2.12.

  • What must be completed by December 31, 2025?

    • Maximize FRT and VRT settings
    • Meet applicable IEEE 2800-2022 Sections 5, 7, and 9
    • Submit all accurate models and performance attestations
  • What happens if a project fails to complete modifications by 1/1/2028?

    It must then comply with IEEE 2800-2022 full performance requirements and NOG 2.9.1.1, losing eligibility for legacy exceptions.


IV. Special Scenarios

  • If my project has an SGIA signed before 8/1/24 but amended after, which date applies?

    The original SGIA date remains valid. Amendments do not reset compliance timelines.

  • Does meeting legacy requirements suffice for compliance before 2028?

    Only if the project maximizes its ride-through capability. Minimum settings alone do not suffice.

  • For hybrid projects (solar + BESS), which test cases are required?

    All relevant operational modes must be tested. At minimum, maximum injection and withdrawal scenarios are required.


V. Attestations & Reporting

  • Is attestation via DocuSign enough, or is a full simulation report required?

    Attestation is required. Full simulation reports are not, but accurate models and supporting documentation must be maintained.

  • What if my Resource’s pre- and post-maximization settings are the same?

    That’s acceptable if justified. The Resource must demonstrate those settings already reflect maximum performance consistent with Good Utility Practice.


VI. Key Resources & Guidance


Read More



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About the Author:

Sonny Patel P.E. EC

IEEE Senior Member

In 1995, Sandip (Sonny) R. Patel earned his Electrical Engineering degree from the University of Illinois, specializing in Electrical Engineering . But degrees don’t build legacies—action does. For three decades, he’s been shaping the future of engineering, not just as a licensed Professional Engineer across multiple states (Florida, California, New York, West Virginia, and Minnesota), but as a doer. A builder. A leader. Not just an engineer. A Licensed Electrical Contractor in Florida with an Unlimited EC license. Not just an executive. The founder and CEO of KEENTEL LLC—where expertise meets execution. Three decades. Multiple states. Endless impact.

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A bald man with a beard is wearing a suit and a white shirt.

About the Author:

Sonny Patel P.E. EC

IEEE Senior Member

In 1995, Sandip (Sonny) R. Patel earned his Electrical Engineering degree from the University of Illinois, specializing in Electrical Engineering . But degrees don’t build legacies—action does. For three decades, he’s been shaping the future of engineering, not just as a licensed Professional Engineer across multiple states (Florida, California, New York, West Virginia, and Minnesota), but as a doer. A builder. A leader. Not just an engineer. A Licensed Electrical Contractor in Florida with an Unlimited EC license. Not just an executive. The founder and CEO of KEENTEL LLC—where expertise meets execution. Three decades. Multiple states. Endless impact.

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