NOTICE DATE: July 19, 2013
NOTICE TYPE: M-A013113-04 NPRR
SHORT DESCRIPTION: Additional implementation details for NPRR461
INTENDED AUDIENCE: ERCOT Market Participants and Settlement Personnel
DAYS AFFECTED: August 1, 2013
LONG DESCRIPTION: On January 15, 2013, the ERCOT Board modified the Effective Date of Nodal Protocol Revision Request (NPRR) 461, Energy Storage Settlements Consistent with PUCT Project 39917, from "upon system implementation" to "upon implementation of Release 6." On February 14, 2013, ERCOT implemented Release 6, unboxed the associated protocol language making this the effective Operating Day for theNPRR461 logic.
On August 1, 2013, ERCOT will complete implementation of Release 4 including the system changes and production migration of NPRR461. Please note that the ERCOT Board authorized ERCOT to use NPRR461 Settlement logic for any affected Operating Days on and after system implementation of "Release 6".
Therefore, the NPRR461 Settlement logic will be applied on regularly scheduled Settlement Statements for the following Operating Days:
· RTM Initial Settlement starting with Operating Day of 07/25/2013
· RTM Final Settlement starting with Operating Day of 06/06/2013
· RTM True-Up Settlement starting with Operating Day of 02/14/2013
Impacted Charge Type:
Real-Time Energy Imbalance at a Resource Node (RTEIAMT)
Please note that NMSAMTTOT will be used in the calculation of Real-Time Energy Imbalance for all Resource Nodes. RTMG will no longer be used.
RTEIAMT_<Q>_<SP> = (-1) * [((GSPLITPER_<Q>_<R>_<GSC>_<SP>)) *NMSAMTTOT_<GSC>) + (WSLAMTTOT_<Q>_<R>_<SP>) + RTSPP_<SP> * {(SSSK_<Q>_<SP> * ¼) + (DAEP_<Q>_<SP> * ¼) + (RTQQEP_<Q>_<SP> * ¼) -
(SSSR_<Q>_<SP> * ¼) - (DAES_<Q>_<SP> * ¼) - (RTQQES_<Q>_<SP> * ¼)}]
New Settlement Bill Determinants:
The following new bill determinants will be implemented for NPRR461:
Bill Determinant
Short Description
Extract
Extract Table
WSLAMTTOT
Wholesale Storage Load Settlement
RTM CODE
RTMOUTPUTHEADER
RTMOUTPUTINTERVAL
RTRMPRWSL
Real-Time Price for the Energy Metered as Wholesale Storage Load at bus
SID
RTM MODE
MKTINPUTHEADER
MKTINPUTINTERVAL
MEBC
Metered Energy at the Bus - Calculated
RTM CODE
AGGOUTPUTHEADER
AGGOUTPUTINTERVAL
MEBL
Metered Energy at the Bus - Load
RTM CODE
AGGOUTPUTHEADER
AGGOUTPUTINTERVAL
Extract Changes:
In support of NPRR461, ERCOT is making the following changes to the extracts and their supporting documents:
Additions will be made to the Public Reference Data Extract (PRDE).
· New Table added: METERTYPE
Additions will be made to the Resource ID (RID) Extract and the Recorder ID (REC) Extract.
· New Column added: RESOURCEID.DISPATCHASSETCODE
· New Column added: RESOURCEID.METERTYPECODE
· New Column added: RESOURCEID.METERGROUP
User Guides, DDLs and XSDs for NPRR461 can be found on the ERCOT website, under Services, at http://www.ercot.com/services/mdt/.
The Real-Time Price for the Energy Metered as Wholesale Storage Load at bus (RTRMPRWSL) for previous Operating Days (starting February 25, 2013) will be published in the SID Extract posted on 8/2/2103.
The changes to the remainder of the above mentioned extracts will occur starting on 8/2/2013 postings.
ACTION REQUIRED: Implement changes to shadow settlement systems in compliance with NPRR461.
ADDITIONAL INFORMATION: NPRR461 and associated documents can be found on the ERCOT website, under Market Rules, at http://www.ercot.com/mktrules/issues/nprr/451-475/index.
Information on upcoming releases can be found on the ERCOT Multi Year Project Priority List (PPL) at http://www.ercot.com/services/projects/.
CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask]<mailto:[log in to unmask]>.
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