Title: Generic Startup Costs for Combined Cycle Generation Resources -- Removal of Temporal Constraint
Next Group:
Next Step:
Status: Approved on 10/19/2010
Effective Dates:

or per the Nodal Protocol Transition Plan http://www.ercot.com/mktrules/protocols (11/01/10 Nodal Protocols Library)


Date Gov Body Action Taken Next Steps
10/19/2010 BOARD Approved
10/07/2010 TAC Recommended for Approval ERCOT Board consideration of NPRR274
10/04/2010 PRS Recommended for Approval TAC consideration of NPRR274
09/23/2010 PRS Recommended for Approval PRS Impact Analysis review

Voting Record

Date Gov Body Motion Result
10/19/2010 BOARD To approve NPRR274 as recommended by TAC in the 10/7/10 TAC Report. Passed
10/07/2010 TAC To recommend approval of NPRR274 as recommended by PRS in the 10/4/10 PRS Report. Passed
10/04/2010 PRS To endorse and forward the 9/23/10 PRS Report and Impact Analysis for NPRR274 to TAC. Passed
09/23/2010 PRS To recommend approval of NPRR274 as submitted. Passed

Vote tallies here reflect individual votes, not the weight of the votes by market segment. Affirmative votes are not recorded in these vote tallies. For additional details on the voting record, please consult the Recommendation or Action Report, or the official vote tally if available, as posted in the key documents.


Status: Approved
Date Posted: Sep 15, 2010
Sponsor: ERCOT
Urgent: No
Description: 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.
Reason: The 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 for Combined Cycle Generation Resources with a combustion turbine either larger/equal to 90 MW or less than 90 MW.

Key Documents

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