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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
SMOGRR025 Modifications to Line Loss Compensation Requirement for EPS Metering
VCMRR031 Clarification Related to Variable Costs in Fuel Adders
VCMRR032 Calculation of Average Running Hours per Start when Determining the Variable O&M for QSGRs
OBDRR034 Related to NPRR1099, Managing Network Operations Model Resource Nodes
OBDRR037 Power Balance Penalty Updates to Align with PUCT Approved High System-Wide Offer Cap
OBDRR038 Minimum Contingency Level Updates to Align with PUCT Order
PGRR073 Related to NPRR956, Designation of Providers of Transmission Additions
PGRR095 Establish Minimum Deliverability Criteria
PGRR096 Achieve Consistent Representation of Distributed Generation in Steady-State Models
PGRR098 Consideration of Load Shed in Transmission Planning Criteria
PGRR099 Revise GIM Process to Ensure Compliance with the Lone Star Infrastructure Protection Act
PGRR100 Steady-State Case Building Timeline Update
RMGRR166 Revising Timing for Switch Hold Extract Availability
RMGRR168 Modify ERCOT Responsibilities During the Mass Transition
RMGRR169 Related to NPRR1095, Texas SET V5.0 Changes
NOGRR215 Limit Use of Remedial Action Schemes
NOGRR226 Revision to 5% Transmission Operator (TO) Load Shedding Relay Set Point
NOGRR230 WAN Participant Security
NOGRR234 Related to NPRR1098, Direct Current Tie (DC Tie) Reactive Power Capability Requirements
NOGRR235 Combining Greyboxes and Other Corrections
NOGRR239 WAN Data Protection Responsibilities
SCR816 CRR Auction Bid Credit Enhancement
SCR817 Related to NPRR1095, MarkeTrak Validation Revisions Aligning with Texas SET V5.0
SCR818 Changes to Incorporate GIC Modeling Data into Existing Modeling Applications
SCR819 Improving IRR Control to Manage GTC Stability Limits
SCR820 Operator Real-Time Messaging During Emergency
NPRR956 Designation of Providers of Transmission Additions
NPRR981 Day-Ahead Market Price Correction Process
NPRR1058 Resource Offer Modernization for Real-Time Co-Optimization
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 and Derates
NPRR1085 Ensuring Continuous Validity of Physical Responsive Capability (PRC) and Dispatch through Timely Changes to Resource Telemetry and Current Operating Plans (COPs)
NPRR1088 Applying Forward Adjustment Factors to Forward Market Positions and Un-applying Forward Adjustment Factors to Prior Market Positions
NPRR1089 Requiring Highest-Ranking Representative, Official, or Officer of a Resource Entity to Execute Weatherization and Natural Gas Declarations
NPRR1092 Reduce RUC Offer Floor and Remove RUC Opt-Out Provision
NPRR1095 Texas SET V5.0 Changes
NPRR1096 Require Sustained Six Hour Capability for ECRS and Non-Spin
NPRR1097 Create Resource Forced Outage Report
NPRR1098 Direct Current Tie (DC Tie) Reactive Power Capability Requirements
NPRR1099 Managing Network Operations Model Resource Nodes
NPRR1100 Emergency Switching Solutions for Energy Storage Resources
NPRR1102 ERCOT Discretion for Adjusting Non-Interval Data Recorder (NIDR) Backcasted Load Profiles
NPRR1108 ERCOT Shall Approve or Deny All Resource Outage Requests
NPRR1110 Black Start Requirements Update
NPRR1111 Related to SCR819, Improving IRR Control to Manage GTC Stability Limits
NPRR1112 Elimination of Unsecured Credit Limits
NPRR1113 Clarification of Regulation-Up Schedule for Controllable Load Resources in Ancillary Service Imbalance
NPRR1114 Securitization – PURA Subchapter N Uplift Charges
NPRR1115 Administrative Changes for February 1, 2022 Nodal Protocols - Update ERCOT Austin Office Address
NPRR1116 Remove Obsolete Reference to Market Information System (MIS)
NPRR1117 Related to SMOGRR025, Modifications to Line Loss Compensation Requirement for EPS Metering
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