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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 |
|---|---|
| SMOGRR028 | Add Series Reactor Compensation Factors |
| VCMRR042 | SO2 and NOx Emission Index Prices Used in Verifiable Cost Calculations |
| OBDRR046 | Related to NPRR1188, Implement Nodal Dispatch and Energy Settlement for Controllable Load Resources |
| OBDRR052 | Related to NPRR1246, Energy Storage Resource Terminology Alignment for the Single-Model Era |
| OBDRR053 | Alignment with NPRR1131, Controllable Load Resource Participation in Non-Spin, and Minor Clean-Ups |
| PGRR073 | Related to NPRR956, Designation of Providers of Transmission Additions |
| PGRR107 | Related to NPRR1180, Inclusion of Forecasted Load in Planning Analyses |
| PGRR115 | Related to NPRR1234, Interconnection Requirements for Large Loads and Modeling Standards for Loads 25 MW or Greater |
| PGRR116 | Related to NPRR1240, Access to Transmission Planning Information |
| PGRR117 | Addition of Resiliency Assessment and Criteria to Reflect PUCT Rule Changes |
| PGRR118 | Related to NPRR1246, Energy Storage Resource Terminology Alignment for the Single-Model Era |
| PGRR119 | Stability Constraint Modeling Assumptions in the Regional Transmission Plan |
| PGRR120 | SSO Prevention for Generator Interconnection |
| PGRR121 | Related to NOGRR272, Advanced Grid Support Requirements for Inverter-Based ESRs |
| PGRR122 | Reliability Performance Criteria for Loss of Load |
| RMGRR181 | Alignment of Defined Term Usage and Resolution of Inconsistencies |
| NOGRR262 | Provisions for Operator-Controlled Manual Load Shed |
| NOGRR263 | Related to NPRR1244, Clarification of Controllable Load Resource Primary Frequency Response Responsibilities |
| NOGRR264 | Related to NPRR1235, Dispatchable Reliability Reserve Service as a Stand-Alone Ancillary Service |
| NOGRR265 | Related to NPRR1238, Voluntary Registration of Loads with Curtailable Load Capabilities |
| NOGRR266 | Related to NPRR1239, Access to Market Information |
| NOGRR267 | Related to NPRR1240, Access to Transmission Planning Information |
| NOGRR268 | Related to NPRR1246, Energy Storage Resource Terminology Alignment for the Single-Model Era |
| NOGRR270 | Alignment Changes for December 1, 2024 Nodal Operating Guide – NPRR1221 |
| NOGRR271 | Related to NPRR1257, Limit on Amount of RRS a Resource can Provide Using Primary Frequency Response |
| NOGRR272 | Advanced Grid Support Requirements for Inverter-Based ESRs |
| SCR826 | ERCOT.com Enhancements |
| SCR827 | Grid Conditions Graph Addition for Operating Reserve Demand Curve (ORDC) Level |
| NPRR956 | Designation of Providers of Transmission Additions |
| NPRR1070 | Planning Criteria for GTC Exit Solutions |
| NPRR1180 | Inclusion of Forecasted Load in Planning Analyses |
| NPRR1188 | Implement Nodal Dispatch and Energy Settlement for Controllable Load Resources |
| NPRR1190 | High Dispatch Limit Override Provision for Increased Load Serving Entity Costs |
| NPRR1200 | Utilization of Calculated Values for Non-WSL for ESRs |
| NPRR1202 | Refundable Deposits for Large Load Interconnection Studies |
| NPRR1214 | Reliability Deployment Price Adder Fix to Provide Locational Price Signals, Reduce Uplift and Risk |
| NPRR1215 | Clarifications to the Day-Ahead Market (DAM) Energy-Only Offer Calculation |
| NPRR1221 | Related to NOGRR262, Provisions for Operator Controlled Manual Load Shed |
| NPRR1226 | Demand Response Monitor |
| NPRR1227 | Related to RMGRR181, Alignment of Defined Term Usage and Resolution of Inconsistencies |
| NPRR1229 | Real-Time Constraint Management Plan Energy Payment |
| NPRR1234 | Interconnection Requirements for Large Loads and Modeling Standards for Loads 25 MW or Greater |
| NPRR1235 | Dispatchable Reliability Reserve Service as a Stand-Alone Ancillary Service |
| NPRR1236 | RTC+B Modifications to RUC Capacity Short Calculations |
| NPRR1237 | Retail Market Qualification Testing Requirements |
| NPRR1238 | Voluntary Registration of Loads with Curtailable Load Capabilities |
| NPRR1239 | Access to Market Information |
| NPRR1240 | Access to Transmission Planning Information |
| NPRR1241 | Firm Fuel Supply Service (FFSS) Availability and Hourly Standby Fee |
| NPRR1243 | Revision to Requirements for Notice and Release of Protected Information or ECEII to Certain Governmental Authorities |
| NPRR1244 | Clarification of Controllable Load Resource Primary Frequency Response Responsibilities |
| NPRR1245 | Additional Clarifying Revisions to Real-Time Co-Optimization |
| NPRR1246 | Energy Storage Resource Terminology Alignment for the Single-Model Era |
| NPRR1247 | Incorporation of Congestion Cost Savings Test in Economic Evaluation of Transmission Projects |
| NPRR1248 | Correction to NPRR1197, Optional Exclusion of Load from Netting at EPS Metering Facilities which Include Resources |
| NPRR1249 | Publication of Shift Factors for All Active Transmission Constraints in the RTM |
| NPRR1250 | RPS Mandatory Program Termination |
| NPRR1251 | Updated FFSS Fuel Replacement Costs Recovery Process |
| NPRR1252 | Pre-notice for Sharing of Some Information, Addition of Research and Innovation Partner, Clarifying Notice Requirements |
| NPRR1253 | Incorporate ESR Charging Load Information into ICCP |
| NPRR1254 | Modeling Deadline for Initial Submission of Resource Registration Data |
| NPRR1255 | Introduction of Mitigation of ESRs |
| NPRR1256 | Settlement of MRA of ESRs |
| NPRR1257 | Limit on Amount of RRS a Resource can Provide Using Primary Frequency Response |
| NPRR1258 | TSP Performance Monitoring Update |
| NPRR1259 | Update Section 15 Level Response Language |
| NPRR1260 | Corrections for CLR Requirements Inadvertently Removed |
| NPRR1261 | Operational Flexibility for CRR Auction Transaction Limits |
| NPRR1262 | Ancillary Service Opt Out Clarification |