Title: Adjust the Calculation of the Real-Time Settlement Point Price for a Load Zone
Next Group:
Next Step:
Status: Approved on 08/16/2011
Effective Dates:


Date Gov Body Action Taken Next Steps
08/16/2011 BOARD Approved
07/07/2011 TAC Recommended for Approval ERCOT Board consideration of NPRR355
06/23/2011 PRS Recommended for Approval TAC consideration of NPRR355
05/19/2011 PRS Recommended for Approval PRS Impact Analysis review

Voting Record

Date Gov Body Motion Result
08/16/2011 BOARD To approve NPRR355 as recommended by TAC in the 7/7/11 TAC Report. Passed
07/07/2011 TAC To recommend approval of NPRR355 as recommended by PRS in the 6/23/11 PRS Report. Passed
06/23/2011 PRS To endorse and forward the 5/19/11 PRS Report, Impact Analysis and Cost Benefit Analysis for NPRR355 to TAC with a recommended priority of High and rank of 32. Passed
05/19/2011 PRS To recommend approval of NPRR355 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: Apr 27, 2011
Sponsor: ERCOT
Urgent: No
Description: This Nodal Protocol Revision Request (NPRR) removes the energy-weighting in the current calculation for the Real-Time Settlement Point Price (RTSPP) for a Load Zone. It also adds a new RTSPP for a Load Zone that is energy-weighted (Real-Time Settlement Point Price Energy-Weighted (RTSPPEW)) and adjusts the appropriate formulas that use these prices. This NPRR also corrects the Real-Time Price for the Energy Metered for each Resource meter at bus (RTRMPR b) in the event that the Energy at bus near Real-Time (EBNRT) is less than or equal to zero. This NPRR also includes several minor, non-substantive corrections.
Reason: The two equations using the RTSPP and RTSPPEW prices are the Real-Time Energy Imbalance Amount (RTEIAMT) at a Load Zone and Block Load Transfer Resource Amount (BLTRAMT). The proposed adjustments will ensure that for 15 minute Settlement Intervals in which there is no congestion (i.e. within each SCED interval all the LMPs are the same at all electrical buses) there will be no difference in the Load Zone, Resource Node and Hub 15 minute prices.

Key Documents

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