Title: Clarification for Posting Transmission Loss Factors
Next Group:
Next Step:
Status: Approved on 11/19/2013
Effective Dates:


Date Gov Body Action Taken Next Steps
11/19/2013 BOARD Approved
09/05/2013 TAC Recommended for Approval ERCOT Board Consideration
08/22/2013 PRS Recommended for Approval TAC Consideration
07/18/2013 PRS Recommended for Approval PRS IA Review

Voting Record

Date Gov Body Motion Result
11/19/2013 BOARD To approve NPRR549 as recommended by TAC in the 9/5/13 TAC Report. Passed
09/05/2013 TAC To recommend approval of NPRR549 as recommended by PRS in the 8/22/13 PRS Report Passed
08/22/2013 PRS To endorse and forward the 7/18/13 PRS Report as revised by PRS and the Impact Analysis for NPRR549 to TAC Passed
07/18/2013 PRS To recommend approval of NPRR549 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: Jun 24, 2013
Sponsor: ERCOT
Urgent: No
Sections: 13.2.4, 13.2.5
Description: This Nodal Protocol Revision Request (NPRR) clarifies the posting requirements for Transmission Loss Factors (TLFs).
Reason: Per Section 13.2.4, TLFs are calculated for each of the four seasons and are posted to the Market Information System (MIS) Public Area prior to the start of the year. This NPRR aligns the Protocols with current practice by clarifying that ERCOT will post the seasonal TLFs for the next four seasons beginning with the Spring season. Additionally, since the cases used to calculate the TLFs are classified as Critical Energy Infrastructure Information (CEII) and therefore cannot be posted to the MIS Public Area due to restrictions, the provision requiring the inclusion of the monthly cases in the posting is deleted. The cases will continue to be posted on the Planning and Operations Information site.

Key Documents

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