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NPRR #287 · Revision Request

NPRR287  Real-Time Market Price Delivery Consistency

Rejected sponsor ERCOT posted 2010-10-18 ercot.com
ReasonBased on ERCOT’s analysis, there is not a methodology by which the delivery of Real-Time prices can be "synchronously" delivered at the same time across the two different existing technologies (ICCP and webservices). In addition, ERCOT cannot guarantee any technology solution that is faster than ICCP prior to Nodal go-live for delivery of pricing data. Although there have been historical discussions about whether ICCP should be expanded to pump prices faster to the broader ERCOT market (beyond Qualified Scheduling Entities (QSEs) with Resources), issues that have prevented further consideration in the past are: (1) The risk to performance of the Real-Time command and control instructions; and (2) The cost of additional telemetry bandwidth and support. For further consideration, it is worth noting that a recent samplings of delivery across the two technologies was: - ICCP: a range of 4-8 seconds; and - Webservices report: a range of 4-13 seconds, with an average of 6 seconds (MP would still need to retrieve report). ERCOT is pursuing technical options to possibly increase the webservices delivery speed and create an end-user table display that may bring the timeline even closer to ICCP delivery, but it would not be synchronous and cannot be guaranteed to be faster. If, based on this analysis of the different timing of price delivery, this is a significant market issue, ERCOT would propose that ICCP be limited to exclude all prices, which results in changes to the table summary in Section 6.3.2 but does not change the elements supported in Section 6.5.7.4, Base Points. In this manner the delivery of prices to all ERCOT Market Participants are on the same timeline, where the Market Participant can leverage existing web services or displays to monitor and act on changes in prices that are posted upon completion of every Security-Constrained Economic Dispatch (SCED) run to the Market Information System (MIS) Public Area. It is also noted that upon approval of this NPRR it would require removal of price fields from the ICCP Handbook (Table 20). This systematic removal is a quick change for ERCOT systems (configuration change), but may be a significant change to QSEs that have built pricing logic into their telemetry and downstream business processes.
Created2010-10-21
Rejected2010-12-16
Sections Affected
6.3.2
Summary
This Nodal Protocol Revision Request (NPRR) proposes to remove Locational Marginal Prices (LMPs) from Inter-Control Center Communications Protocol (ICCP) communications, based on emerging concerns regarding the inconsistent timeframes for price delivery in Real-Time.
Action Log 3 milestones
Documents 10
NameTypePostedClassification
287NPRR-01 Real-Time Market Price Delivery Consistency 101810 doc Oct 18 '10 Revision Request
287NPRR-02 CEO Revision Request Review 101810 doc Oct 18 '10 Revision Request Comments
287NPRR-03 Preliminary Impact Analysis 101810 doc Oct 18 '10 Staff Report
287NPRR-04 Luminant Energy Comments 102010 doc Oct 20 '10 Revision Request Comments
287NPRR-05 Tenaska Power Services Comments 102010 doc Oct 20 '10 Revision Request Comments
287NPRR-06 PRS Report 102110 doc Oct 25 '10 Committee Report
287NPRR-07 ERCOT Comments 110410 doc Nov 4 '10 Revision Request Comments
287NPRR-08 PRS Report 111810 doc Nov 22 '10 Committee Report
287NPRR-09 Revised CEO Revision Request Review 113010 doc Nov 30 '10 Staff Report
287NPRR-10 PRS Report 121610 doc Dec 20 '10 Committee Report
Meetings That Took It Up 5
DateMeetingCommitteeStatus
Jan 6 '11 TAC Meeting TAC Concluded
Dec 16 '10 PRS Meeting PRS Concluded
Nov 18 '10 PRS Meeting PRS Concluded
Oct 26 '10 NATF Meeting NATF Concluded
Oct 21 '10 PRS Meeting PRS Concluded