NOTICE DATE: April 1, 2016
NOTICE TYPE: M-C031116-02 NPRR
SHORT DESCRIPTION: Reminder - Implementation Details of NPRR419
INTENDED AUDIENCE: ERCOT Market Participants
DAY AFFECTED: April 12, 2016
LONG DESCRIPTION: ERCOT will be implementing Nodal Protocol Revision Request (NPRR) 419, Revise Real-Time Energy Imbalance and RMR Adjustment Charge, on April 12, 2016. NPRR419 was approved by the ERCOT Board
on April 17, 2012.
NPRR419 provides additional data elements in the Real-Time Energy Imbalance (RTEI) equations to identify the Resource’s share of the generation site
total revenues and revises the Resource Node, Load Zone and Hub equations to provide the volumetric imbalance for each Qualified Scheduling Entity (QSE) and Settlement Point. This NPRR will also revise the Reliability Must Run (RMR) adjustment charge to charge
the QSE for the revenues paid in accordance with the energy imbalance calculation.
o
Settlement calculation revisions:
6.6.3.1 Real-Time Energy Imbalance Payment or Charge at a Resource Node
RTEIAMT q, p = (-1) * {((RESREV
q, r, gsc, p)) + (WSLAMTTOT
q, r, p) + RTSPP p * [(SSSK q, p * ¼) + (DAEP
q, p * ¼) + (RTQQEP q, p * ¼) – (SSSR q, p * ¼) – (DAES
q, p * ¼) – (RTQQES q, p * ¼)]}
Where:
RESREV q, r, gsc, p
= GSPLITPER q, r, gsc, p * NMSAMTTOT gsc
The following bill determinants are informational output bill determinants that are only used to provide volumetric imbalance data to the QSE for the Resource Node Settlement Point:
RNIMBAL q, p =(RESMEB
q, r, gsc, p) + WSLTOT q, p + (SSSK
q, p * ¼) + (DAEP q, p * ¼) + (RTQQEP q, p * ¼) – (SSSR
q, p * ¼) – (DAES q, p * ¼) – (RTQQES q, p * ¼)
Where:
RESMEB q, r, gsc, p = GSPLITPER
q, r, gsc, p * NMRTETOT gsc
6.6.3.2 Real-Time Energy Imbalance Payment or Charge at a Load Zone
The following bill determinant is an informational output bill determinant that is only used to provide volumetric imbalance data to the QSE for the Load Zone Settlement Point:
LZIMBAL q, p = (SSSK
q, p * ¼) + (DAEP q, p * ¼) + (RTQQEP q, p * ¼) – (SSSR
q, p * ¼) – (DAES q, p * ¼) – (RTQQES q, p * ¼) – RTAML
q, p + RTMGNM q, p
6.6.3.3 Real-Time Energy Imbalance Payment or Charge at a Hub
The following bill determinant is an informational output bill determinant that is only used to provide volumetric imbalance data to the QSE for the Hub Settlement Point:
HBIMBAL q, p = (SSSK q, p * ¼) + (DAEP
q, p * ¼) + (RTQQEP q, p * ¼) – (SSSR q, p * ¼) – (DAES
q, p * ¼) – (RTQQES q, p * ¼)
6.6.6.3 RMR Adjustment Charge
RMRAAMT q = (-1) * [((-1)
* RESREV q, r, gsc, p +
EMREAMT
q, r, p, i + RUCMWAMT q, r, p + RUCCBAMT q, r, p + RUCDCAMT
q, r, p +
VSSEAMT
q, r, p, i +
VSSVARAMT
q, r, i)]
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New Settlement Bill Determinants:
The following bill determinants will be implemented for NPRR419:
Bill Determinant |
Short Description |
Extract |
Extract Table |
RESREV |
Resource Share Revenue Settlement Payment |
RTM CODE |
RTMOUTPUTHEADER
RTMOUTPUTINTERVAL |
RESMEB |
Resource Share Net Meter Real-Time Energy Total |
RTM CODE |
RTMOUTPUTHEADER RTMOUTPUTINTERVAL |
RNIMBAL |
Resource Node Energy Imbalance per QSE per Settlement Point |
RTM CODE |
RTMOUTPUTHEADER RTMOUTPUTINTERVAL |
LZIMBAL |
Load Zone Energy Imbalance per QSE per Settlement Point |
RTM CODE |
RTMOUTPUTHEADER RTMOUTPUTINTERVAL |
HBIMBAL |
Hub Energy Imbalance per QSE per Settlement Point |
RTM CODE |
RTMOUTPUTHEADER RTMOUTPUTINTERVAL |
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Credit calculation revisions:
Minimum Current Exposure (MCE) as defined in Nodal Protocols Section 16.11.4.1 uses Total Metered Generation (G o, i, d, k) as an input. Total Metered Generation (G o, i, d, k) is currently estimated
using Real Time Metered Generation (RTMG) as an input. With the implementation of NPRR 419,
the Total Metered Generation input is changed to Resource Share Revenue Settlement Payment (RESREV
q, r, gsc, p).
A new column, GENSITECODE, will be added to the RTMOUTPUTHEADER data set within the following extracts. The data will only be present for those that the data applies.
·
Real Time Market Consolidated Operating Day Extract (EMIL ID NP12-747, Report ID 11113)
·
Real Time Market Market Operating Day Extract (EMIL ID NP12-749, Report ID 11114)
ACTION REQUIRED: Implement changes to shadow Settlement systems for NPRR419.
ADDITIONAL INFORMATION:
Pursuant to Nodal Protocol Section 21.6, Nodal Protocol Revision Implementation, ERCOT is required to provide notice as soon as practicable, but no later than ten days prior to implementation.
NPRR419 and associated documents can be found on the ERCOT website. Draft ‘Settlement’ supplemental information including the Data Definition Language (DDL) for the Comma Separated
Value (CSV) files and the XML Schema Definitions (XSD) for the Extensible Markup Language (XML) files are available on the Market Data Transparency section of the ERCOT Website.
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].
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