NOTICE DATE: July 8, 2016

NOTICE TYPE: W-A070816-01 Unplanned Outage

SHORT DESCRIPTION: Unplanned Outage of Energy Management System

INTENDED AUDIENCE: ERCOT Market Participants

DAY AFFECTED: July 7, 2016 from 11:42:00 – 13:23:00 CDT

LONG DESCRIPTION: On July 7, 2016 from 11:42:00 – 13:23:00 CDT, ERCOT experienced an issue with the Energy Management System (EMS). EMS was unavailable from 11:42 until 12:05 and was running in a degraded state from 12:05 until 13:23. EMS has been fully functional since that time. EMS reports and dashboards for 11:42:00 – 13:23:00 CDT on Operating Day (OD) July 7, 2016 should be considered invalid. Please disregard such reports during that timeframe. No report postings were missed as a result of the issue.

ERCOT will correct prices for Security-Constrained Economic Dispatch (SCED) intervals from 11:42:55 to 13:20:25 for OD July 7, 2016 (i.e., for Real-Time Market 15-minute Settlement Intervals from Interval Ending (IE) 11:45 to IE 13:30). SCED prices from 11:40:47 will be used for the affected SCED intervals. Complete price correction data will be posted on ERCOT’s Market Information System (MIS) as soon as possible, but no later than 16:00 on July 11, 2016.

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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