Market Rules Market Rules

Balanced market rules are a basic element in Texas competition. Clear, predictable and well-designed rules help foster a stable electricity market. Electric Reliability Council of Texas (ERCOT) market rules are developed by participants from all aspects of the electricity industry. The rules and amendments are reviewed by the Public Utility Commission of Texas to ensure that they satisfy the public interest.

In this section, you will find the ERCOT protocols, guides, policies and procedures that help steer the Texas market participants.

Pending Revision Requests and Issues

COPMGRR034 Updates to the Market Notice Communication Process
COPMGRR035 Synchronization of NPRR347 and NPRR509
There are currently no open issues.
NOGRR104 Removal of Transmission Operator Definition From the Nodal Operating Guide
NOGRR109 Revisions to Definition of Credible Single Contingency for Operations Planning
NOGRR110 Synchronization with NPRR529, Congestion Management Plan
NOGRR111 Synchronization with NPRR527, Required Combined Cycle Telemetry for Operational Awareness and PDCWG Analysis
NOGRR112 Synchronization with NPRR517, Revisions to the Telemetry Standards and State Estimator Standards Approval Process
NOGRR113 Synchronization with NPRR536, ERS Time Obligation Certainty
NOGRR114 Synchronization with NPRR540, Clarification of Credible Single Contingency
NOGRR115 Update to List of CREZ Circuits and Stations
NOGRR116 Synchronization with NPRR542, Clarification of the Use of Emergency Condition
NOGRR117 Administrative Changes for June 1, 2013 Nodal Operating Guides
NPRR190 Clarification of Resource Definitions and Resource Registration of Self-Serve Generators for Reliability Purposes
NPRR340 Introduction and Definition of Duration-Limited Resources (formerly “Unannounced HSL test for Duration-Limited Resources”)
NPRR429 HASL Offset Provision
NPRR486 Calculation of Generation to be Dispatched
NPRR490 Clarification of TSP Definition and Confidentiality Obligations
NPRR491 Updated Distributed Generation and Demand Response Information for ERCOT
NPRR503 Removal of Language Related to NPRR219
NPRR505 ERS Weather-Sensitive Loads
NPRR508 Setting of Real-Time LMPs During EEA ERS/Load Resource Deployment
NPRR513 Removal of Nodal Implementation Surcharge
NPRR515 Day-Ahead Market Self-Commitment of Generation Resources
NPRR516 Change to Verifiable Cost Manual Revision Process
NPRR517 Revisions to the Telemetry Standards and State Estimator Standards Approval Process
NPRR519 Exemption of ERS-Only QSEs from Collateral and Capitalization Requirements
NPRR522 Adjustment of Demand Response Performance for Distribution Losses (formerly “Adjustment of Demand Response Performance for T&D Losses ”)
NPRR523 Available Credit Limit (ACLC and/or ACLD) Calculations During Computer System Failures
NPRR524 Resource Limits in Providing Ancillary Service
NPRR525 Elimination of Three-Year Expiration for CRR Auction Revenue Distribution Methodology
NPRR526 Frequency of Audit on ERCOT Model
NPRR527 Required Combined Cycle Telemetry for Operational Awareness and PDCWG Analysis
NPRR528 Clarification of Assessment of Chronic Congestion
NPRR529 Congestion Management Plan
NPRR531 Clarification of IRR Forecasting Process Posting Requirement
NPRR532 Performance Measurement and Verification and Telemetry Requirements for Load Resources Providing Non-Spin
NPRR533 Clarification of PCRR Eligibility Requirements
NPRR535 Resource Status Startup - Shutdown
NPRR536 ERS Time Obligation Certainty
NPRR537 ERS Clearing Price
NPRR538 Clarification of the Non-Spin Energy Offer Curve Requirements for QSGRs
NPRR539 Amend Wholesale Storage Load Definition
NPRR540 Clarification of Credible Single Contingency
NPRR541 SPS and RAP Modeling Clarification
NPRR542 Clarification of the Use of Emergency Condition
NPRR543 Message for Confirmed E-Tags
NPRR544 Energy Offer Curve Requirements for Generation Resources Assigned Non-Spin Responsibility
PGRR027 Analysis of Subsynchronous Resonance Studies in Transmission Studies
PGRR028 Evaluation of Compliance with Reactive Requirements
PGRR029 Deadline for Regional Transmission Plan
There are currently no open issues.
RMGRR111 Process Updates for the Request of Historical Usage Data via Smart Meter Texas Web Portal
RMGRR115 Manual Work-Around Processes to be Utilized During Extended Retail Outages
There are currently no open issues.
There are currently no open issues.
TXSET134 Non – CSA CR sends a MVO with the indicator for bypass CSA at ERCOT.  Non CSA CR is not always the owner of the CSA, causing the ESIID to become de-energized without CSA CRs knowledge.