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ERCOT Client Services <[log in to unmask]>
Tue, 9 Aug 2016 21:57:09 +0000
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NOTICE DATE:  August 9, 2016

NOTICE TYPE:  W-A070816-06 Settlements

SHORT DESCRIPTION:  ERCOT will issue RTM Resettlements to correct data issues for Operating Day July 7, 2016


DAY AFFECTED:  July 7, 2016

LONG DESCRIPTION:  As noted in Market Notice W-A070816-05 issued on July 14, 2016, on July 7, 2016, ERCOT experienced issues with the Energy Management System (EMS) which caused corrupt data (including Emergency Base Point data) to be passed through downstream systems including the Settlements System. The corrupt data was not used in Initial Settlements.

ERCOT has completed analyzing the impact of the data integrity issues for the EMS issue and has determined that the most appropriate method for Emergency Operations Settlement for the outage period on July 7, 2016 (i.e., intervals 11:45 - 13:30) is to use Real-Time Metered Generation (RTMG) in place of Emergency Base Point data under ERCOT Protocols Section 6.6.9(4).  This results in changes that meet the 2% threshold under ERCOT Protocols Section 9.5.6(2) which requires ERCOT to issue a Real-Time Market (RTM) Resettlement Statement for a given Operating Day due to a data error in data other than prices.

ERCOT will communicate the specific resettlements through Market Information System (MIS) Notices as required by the ERCOT Protocols. These Notices can be accessed on

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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