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

Issue Title
VCMRR031 Clarification Related to Variable Costs in Fuel Adders
RRGRR032 Related to NPRR1132, Communicate Operating Limitations during Cold and Hot Weather Conditions
VCMRR033 Excluding Exceptional Fuel Costs from Fuel Adders
VCMRR034 Excluding RUC Approved Fuel Costs from Fuel Adders
VCMRR035 Allow Verified Contractual Costs in Fuel Adder Calculation
OBDRR041 Updates to Requirements for Aggregate Load Participation in the ERCOT Markets
OBDRR043 Related to NPRR1148, Language Cleanup Related to ERCOT Contingency Reserve Service (ECRS)
LPGRR069 Add Lubbock Zip Codes
PGRR073 Related to NPRR956, Designation of Providers of Transmission Additions
RMGRR170 Inadvertent Gain Process Updates
NOGRR215 Limit Use of Remedial Action Schemes
NOGRR226 Addition of Supplemental UFLS Stages
NOGRR230 WAN Participant Security
NOGRR241 Related to NPRR1127, Clarification of ERCOT Hotline Uses
NOGRR242 Update POIB References
NOGRR243 Implementation of Seasonal Load Shed Tables
SCR820 Operator Real-Time Messaging During Emergency
SCR821 Voltage Set Point Target Information for Distribution Generation Resource (DGR) or Distribution Energy Storage Resource (DESR)
SCR823 ERCOT Mass System “County Name” File Updates for Texas SET V5.0 Implementation
NPRR956 Designation of Providers of Transmission Additions
NPRR1058 Resource Offer Modernization
NPRR1067 Market Entry Qualifications, Continued Participation Requirements, and Credit Risk Assessment
NPRR1070 Planning Criteria for GTC Exit Solutions
NPRR1084 Improvements to Reporting of Resource Outages, Derates, and Startup Loading Failures
NPRR1089 Requiring Highest-Ranking Representative, Official, or Officer of a Resource Entity to Execute Weatherization and Natural Gas Declarations
NPRR1118 Clarifications to the OSA Process
NPRR1127 Clarification of ERCOT Hotline Uses
NPRR1128 Allow FFR Procurement up to FFR Limit Without Proration
NPRR1132 Communicate Operating Limitations during Cold and Hot Weather Conditions
NPRR1138 Communication of Capability and Status of Online IRRs at 0 MW Output
NPRR1139 Adjustments to Capacity Shortfall Ratio Share for IRRs
NPRR1140 Recovering Fuel Costs for Generation Above LSL During RUC-Committed Hours
NPRR1143 Provide ERCOT Flexibility to Determine When ESRs May Charge During an EEA Level 3
NPRR1144 Station Service Backup Power Metering
NPRR1145 Use of State Estimator-Calculated ERCOT-Wide TLFs in Lieu of Seasonal Base Case ERCOT-Wide TLFs for Settlement
NPRR1146 Credit Changes to Appropriately Reflect TAO Exposure
NPRR1147 Update and Improve Notification and Evaluation Processes Associated with Reliability Must-Run (RMR)
NPRR1148 Language Cleanup Related to ERCOT Contingency Reserve Service (ECRS)
NPRR1149 Implementation of Systematic Ancillary Service Failed Quantity Charges
NPRR1150 Related to NOGRR230, WAN Participant Security
NPRR1151 Protocol Revision Subcommittee Meeting Requirement