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NPRR339

Summary

Title: Modifications to Heuristic Rules to Determine LMP at De-energized Electrical Bus and Treatment of CRR Offers at De-energized Settlement Points
Next Group:
Next Step:
Status: Approved on 04/19/2011
Effective Dates:
06/23/2011

All sections except for Section 4.4.5

07/26/2011

Section 4.4.5

Action

Date Gov Body Action Taken Next Steps
04/19/2011 BOARD Approved
04/07/2011 TAC Recommended for Approval ERCOT Board consideration of NPRR339
03/24/2011 PRS Recommended for Approval TAC consdieration of NPRR339

Voting Record

Date Gov Body Motion Result
04/19/2011 BOARD To approve NPRR339 as recommended by TAC in the 4/7/11 TAC Report. Passed
04/07/2011 TAC To recommend approval of NPRR339 as recommended by PRS in the 3/24/11 PRS Report. Passed
03/24/2011 PRS To recommend approval of NPRR339 as submitted, to recommend a priority of Critical and a rank of 9.3, and to forward NPRR339 to TAC. 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.

Background

Status: Approved
Date Posted: Mar 17, 2011
Sponsor: ERCOT
Urgent: Yes
Sections: 4.4.5, 4.5.1, 6.6.1
Description: This Nodal Protocol Revision Request (NPRR): (a) Extends the heuristic rules to determine the Locational Marginal Price (LMP) at de-energized Electrical Buses; and (b) Changes the treatment of Congestion Revenue Right (CRR) offers when either the source or sink Settlement Point is de-energized in the DAM.
Reason: (a) The current Protocol language for determining the LMP at de-energized Electrical Buses using heuristic rules prevents ERCOT from correcting the LMP when the heuristic rules fail under certain scenarios. This NPRR will allow ERCOT the ability to quickly respond to correct deficiencies found in the heuristic rules to determine LMPs at de-energized Electrical Buses.(b) Currently, CRR offers submitted at de-energized Settlement Points are not awarded in the DAM, no matter what the clearing prices are, and the CRRs settle at Real-Time prices. This NPRR provides that CRR offers submitted at de-energized Settlement Points will always settle at Day-Ahead prices. This is consistent with the treatment of PTP Obligation bids in the DAM, which are not awarded in this scenario, such that no Qualified Scheduling Entity (QSE) can purchase a Real-Time congestion hedge when either the source or sink Settlement Point is de-energized in the DAM.

Key Documents

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