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

There are currently no open issues.
LPGRR046 Administrative Changes for March 1, 2012 Load Profiling Guide
NOGRR080 Inadvertent Interchange and Inadvertent Energy Clarification
NOGRR081 Synchronization with NPRR374, Modification of SCR Process and Urgency Requirements
NOGRR083 Removal of Reporting Requirements for Vegetation-Related Line Outages
NOGRR084 Daily Grid Operations Summary Report
NOGRR085 Replace TML References with MIS
NOGRR086 Clarification of Seasonal Unit Capability Testing Requirements
NOGRR088 Synchronization with NPRR424, Reactive Capability Testing Requirements for IRRs
NOGRR089 Clarification of Responsibilities for Black Start Resources and QSEs
NOGRR090 Change in Entity Responsible for Reporting Participation in Severe Weather Drills
NPRR190 Clarification of Resource Definitions and Resource Registration of Self-Serve Generators for Reliability Purposes
NPRR327 State Estimator Data Redaction Methodology
NPRR340 Introduction and Definition of Duration-Limited Resources (formerly “Unannounced HSL test for Duration-Limited Resources”)
NPRR366 Generation Resource Power Factor Criteria Clarification
NPRR385 Security Violation Analysis and Reporting and Negative Price Floor
NPRR393 SCED Constraint Management Transparency
NPRR394 Outage Reporting
NPRR397 Balance of the Day Ancillary Service Market
NPRR402 Clarification of Pre-DAM RUC Instruction Sequence
NPRR405 Clarification of DC Tie Load into Operational Systems and Processes
NPRR407 Credit Monitoring Posting Requirements (formerly “Credit Monitoring Credit Parameters Posting Requirements”)
NPRR408 Clarification of ERCOT Authority to Deny Energization of Non-Compliant Generators
NPRR410 Definition of an Energy Storage Resource
NPRR412 Quick Start Generation Resource Compliance Metric Adjustments
NPRR416 Removal of the RUC Clawback Charge for Resources Other than RMR Units
NPRR419 Revise Real-Time Energy Imbalance and RMR Adjustment Charge
NPRR421 Clarification of RMR Notifications
NPRR422 Public DAM Shift Factors
NPRR423 Add Voltage Support Requirement for IRRs and Allow SCADA Control of Static VAr Devices if Approved by ERCOT (formerly “Add Voltage Support Requirement for IRRs and Allow Manual Control of Static VAr Devices if Approved by ERCOT”)
NPRR424 Reactive Capability Testing Requirements for IRRs
NPRR425 Creation of a Wind Resource Group for GREDP and Base Point Deviation Evaluation
NPRR429 HASL Offset Provision
NPRR430 Corrections Related to NPRR357, Revisions to Collateral Requirements Concerning CRR Auctions, and Clarification to Collateral Requirements
NPRR431 Board Priority Revision Requests
NPRR432 Deployment of Resources to Alleviate Anticipated Emergency Conditions (formerly "Deployment of Resources to Alleviate Imminent Emergency Conditions")
NPRR433 Clarification of Ancillary Service Obligation Calculation Process
NPRR434 Increase the Capacity Limitation of a Generation Resource Providing RRS
NPRR435 Requirements for Energy Offer Curves in the Real Time SCED for Generation Resources Committed in RUC
NPRR436 Clarify the Use of the Defined Term Season and Its Derivatives
NPRR437 Allow Aggregation of Multiple Generators Into A Single Resource For Market and Engineering Modeling
NPRR438 Additional Minimum Counter-Party Qualification Requirements, Including Risk Management Capability Requirements
NPRR439 Updating a Counter-Party’s Available Credit Limit for Current Day DAM
NPRR440 Consideration of Generation Availability in RMR Analyses
NPRR441 Revision of Dynamic Rating Recommendation Posting Timeline
NPRR442 Energy Offer Curve Requirement for Generation Resources Providing Reliability Must-Run Service
PGRR008 New Planning Guide Section 5 – Generation Resource Interconnection or Change Request (formerly “New Planning Guide Section 4 – Generation Resource Interconnection”)
PGRR010 New Planning Guide Section 6.7, Data Dictionary
PGRR012 Dynamics Working Group Guidelines
PGRR013 New Section 6.3, Process for Developing Short Circuit Cases (Portion of SPWG Procedures)
PGRR014 Synchronization with NPRR374, Modification of SCR Process and Urgency Requirements
PGRR015 New Section 3, Regional Planning
PGRR016 Planning Reserve Margin Review
PGRR017 New Planning Guide Section 6.1, Steady-State Model Development
There are currently no open issues.
There are currently no open issues.
SMOGRR012 Synchronization with NPRR374, Modification of SCR Process and Urgency Requirements
SCR768 Automatic Non-Spin Redeployment and Deployment Based on Resource Availability
SCR769 CRRAH Digital Certificate New Role for Read Only Access
SCR770 Revision to Outage Scheduler Entry for Resource Maintenance Outage Level Designation
SCR771 ERCOT System Change Allowing Independent Master QSE to Represent Split Generation Resources
There are currently no open issues.