Title: Clarification of Generic Transmission Limit Posting Requirements
Next Group:
Next Step:
Status: Approved on 08/12/2014
Effective Dates:


Date Gov Body Action Taken Next Steps
08/12/2014 BOARD Approved
07/31/2014 TAC Recommended for Approval Board for consideration
07/17/2014 PRS Recommended for Approval TAC for consideration
06/11/2014 PRS Recommended for Approval PRS for Impact Analysis review
02/13/2014 PRS Deferred/Tabled PRS for consideration

Voting Record

Date Gov Body Motion Result
08/12/2014 BOARD To approve NPRR593 as recommended by TAC in the 7/31/14 TAC Report. Passed
07/31/2014 TAC To recommend approval of NPRR593 as recommended by PRS in tto recommend approval of NPRR593 as recommended by PRS in the 7/17/14 PRS Reporthe 7/17/14 PRS Report. Passed
07/17/2014 PRS To endorse and forward the 6/11/14 PRS Report and Impact Analysis to TAC. Passed
06/11/2014 PRS To recommend approval of NPRR593 as amended by the 5/22/14 Luminant comments. Passed
02/13/2014 PRS To table NPRR593 and to refer the issue to ROS and WMS. 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: Jan 24, 2014
Sponsor: ERCOT
Urgent: No
Sections: 2.1, 2.2,
Description: This Nodal Protocol Revision Request (NPRR) creates and defines the term "Generic Transmission Constraint" (GTC) to distinguish between the transmission constraint itself and the value of the transmission constraint’s Generic Transmission Limit (GTL); and modifies the definition of GTL to be consistent with this clarification. This NPRR also clarifies the posting requirements for GTCs and GTLs, as current Protocol language does not specify what GTC- or GTL-related information should be posted on the Market Information System (MIS). In practice, ERCOT posts only the predicted GTL values based on its Day-Ahead analysis. ERCOT has not posted background details on the GTCs it uses currently; given that they are artifacts of the Zonal market and are considered common knowledge. As additional GTCs are added to the ERCOT system, it is important that the details behind a GTL and its derivation are made transparent to the Market before the GTC goes into service.
Reason: - Addresses current operational issues - Market efficiencies or enhancements

Key Documents

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