In its latest reliability update, ERCOT’s Reliability Monitor (ERM) released findings from a comprehensive review of Planning Guide Section 5.5 compliance—an assessment triggered by an Incident Review initiated on March 13, 2023, and detailed in Market Notice M-A031323-01.
This review centers around Planning Guide Revision Request (PGRR085), which introduces new compliance obligations for Resource Entities and Market Participants related to model validation, hardware benchmarking, and scheduled parameter reporting.
PGRR085: Benchmarking PSCAD Models Against Physical Testing
Under PGRR085, ERCOT now requires Market Participants to benchmark their Power System Computer Aided Design (PSCAD) models against real-world, physical hardware tests. The goal is to ensure that model behavior matches actual equipment performance, especially in studies involving weak grid conditions or sub-synchronous resonance (SSR).
ERCOT uses two primary modeling tools:
- PSS/E for general planning and steady-state studies
- PSCAD for detailed dynamic modeling in sensitive grid conditions
By aligning simulation behavior with field-tested settings, ERCOT aims to increase accuracy and system reliability across its planning functions.
New Reporting Requirements and Verification Timelines
PGRR085 also outlines specific timelines and documentation requirements for compliance:
- At plant commissioning: Parameter verification reports must be submitted
- Two years post-commissioning: Follow-up verification is required
- Every 10 years thereafter: Ongoing periodic verification ensures continued model fidelity
Resource Entities are also expected to provide regular model updates that reflect any significant system changes or reconfigurations over time.
→ Learn how evolving reporting cycles impact developers in our article: Balancing Interconnection Costs and Timelines in the ERCOT Queue
ERCOT’s Compliance Findings: Submission Deficiencies and Enforcement Risks
As of the latest ERCOT audit:
- 280 out of 394 Resource sites have submitted required verification reports
- Some submissions were incomplete or contained errors and were returned for correction
- A notable number of Resource Entities have not yet addressed these deficiencies
ERCOT has indicated that continued non-compliance will lead to referrals to the Public Utility Commission of Texas Enforcement Division, reinforcing the urgency of meeting the updated planning and verification standards.
Explore how modeling accuracy affects project timelines in Understanding Interconnection Delays: The Growing Challenge
How Zero Emission Grid Can Help You Stay Compliant
Navigating evolving ERCOT planning guide updates, model validation timelines, and technical reporting standards can be overwhelming—especially for developers with large-scale or complex generation assets.
At Zero-Emission Grid (ZEG), we offer:
Technical support with PSCAD/PSS/E modeling compliance
Regulatory guidance for PGRR submissions and audits
Grid siting tools like REST™ to optimize project development
Due diligence support via Sitra™ for pre- and post-commissioning reporting requirements
Contact our team today to see how we can help you streamline compliance, reduce risk, and stay ahead of evolving ERCOT reliability requirements.
