Modules · Compliance studies · Module 002
ERCOT NOGRR 255 Disturbance Monitoring Compliance Support
ERCOT's disturbance monitoring equipment, data, retention, reporting and testing requirements tracked and evidenced per plant alongside PRC-028-1.
About this module
What this module covers.
NOGRR 255 revised the Nodal Operating Guide Section 6.1 regarding disturbance monitoring requirements for generation resources and energy storage resources. This includes equipment location requirements, data requirements, recording requirements, data retention requirements, reporting requirements, and maintenance and testing requirements for disturbance monitoring equipment (DME). NOGRR 255 went into effect on August 1, 2024. Facility owners shall have at least 50% of required DME installed and configured by August 1, 2026, and 100% installed and configured by August 1, 2028. Facility owners shall begin using the required retention periods, data provision timelines, and maintenance and testing timelines for existing equipment immediately or as soon as practicable.
Module: 002
Kind: Compliance studies
Governing body: ERCOT
Applies to: Operating plants
Typical time: About one week, all in
Dashboard capabilities
- Automated Compliance Workflow for NOGRR 255
Support services
What GridStrong does inside this module.
- Create an inventory of all disturbance monitoring equipment (DME) in the plant including fault recording (FR), sequence of events (SOE) recording, dynamic disturbance recording (DDR), and phasor measurement unit (PMU) equipment.
- Review DME specifications, data retention, and reporting capabilities against requirements set forth in NOGRR 255.
- Identify deficiencies of existing DME in meeting the ERCOT requirements such as locations, measurements, data resolution, or reporting criteria.
- Propose new equipment (or modifications to existing equipment, if feasible) that can easily integrate into existing infrastructure using existing CTs, PTs, or communication systems to meet the standard requirements.
- Create the implementation timeline for your plant's NOGRR 279 case: a resource commissioned before July 25, 2024 has until August 1, 2028; a resource with an interconnection agreement signed on or before July 25, 2024 and commissioned after that date has 365 days from its commissioning date; a resource with an agreement signed after July 25, 2024 must comply by its commissioning date.
- Create audit-ready reports, including settings, verification records, maintenance plans, and evidence of corrective actions.
Final deliverables
- Inventory of DME assets to support NOGRR 255 compliance.
- Gap analysis of existing DME compared with NOGRR 255 requirements.
- Recommended equipment and measurement quantities, along with recommended configuration of data retention, triggering, resolution, and other factors.
- Support for developing a phased implementation timeline.
- Reports and records as compliance evidence.
Assumptions and considerations
How the scope is bounded.
Other modules
Every module runs on the same record.
Run this module on one site.
Tell us the plant and the deadline. An engineer confirms the inputs, the schedule and what the Dashboard needs from you.