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NPRR #274 · Revision Request

NPRR274  Generic Startup Costs for Combined Cycle Generation Resources -- Removal of Temporal Constraint

Approved sponsor ERCOT posted 2010-09-15 ercot.com
ReasonThe use of a Startup Offer Generic Cap (i.e., for a Generation Resource that does not have ERCOT-approved verifiable costs) for Combined Cycle Generation Resources based on a universal Resource temporal constraint of less than five hours Off-Line is inconsistent with the design implementation of the ERCOT Day-Ahead Market (DAM) and Reliability Unit Commitment (RUC) applications. This NPRR does not affect the use of Resource-specific temporal constraint data in the DAM and RUC (in other words, the Resource Asset Registration Form temporal constraints will continue to be honored in the DAM and RUC). It is not possible for the Market Management System (MMS) offer validation process to validate the five hour Off-Line temporal constraint for Three-Part Supply Offers at the time of their submission. Additionally, the use of a universal Resource temporal constraint of greater or less than five hours Off-Line conflicts with the Nodal Protocol requirement that the DAM and RUC honor the specific Resource temporal constraint parameters as submitted via the Resource Asset Registration Form. Since the Nodal Protocol requirement can only be met by an after-the-fact validation test, and based on the above considerations, ERCOT has determined that a Nodal Protocol change is required to clarify the Nodal Protocol submission requirements. This change removes the five-hour Off-Line temporal constraint in Section 4.4.9.2.3 for Combined Cycle Generation Resources with a combustion turbine either larger/equal to 90 MW or less than 90 MW.
Created2010-09-23
Approved2010-10-19
Sections Affected
4.4.9.2.3
Summary
This Nodal Protocol Revision Request (NPRR) removes the Startup Offer Generic Cap Resource Categories for Combined Cycle Generation Resources with less than five hours Off-Line.
Timeline