1/14/22, 1:44 PM

M-E010722-02 Planned system maintenance with impacted services

NOTICE DATE: January 14, 2022

NOTICE TYPE: M-E010722-02 Outage - Retail/Wholesale

SHORT DESCRIPTION: Planned system maintenance with impacted services


DAYS AFFECTED: January 18, 2022 15:25 – 18:00

LONG DESCRIPTION:  ERCOT will be performing planned system maintenance of Energy and Market Management systems (EMS, MMS, ITRON and EIN) databases on January 18, 2022 during a maintenance window of 15:25 – 18:00.

During the maintenance period on January 18, 2022, Market Participants will experience an outage on the following services from 15:25 until 15:55.

  • MMS – Security-Constrained Economic Dispatch (SCED)/Look Ahead SCED applications may be unavailable for 3 SCED intervals during the 15:25 to 15:55 time frame
  • Base Points from SCED may not be created for 3 SCED intervals during 15:25 to 15:55 time frame. During this period, Qualified Scheduling Entities (QSEs) with Resources may be required to follow Emergency Base Points from ERCOT Load Frequency Control 
  • Market submissions and requests via Web Services, Market Manager and Outage Scheduler
  • CDR report publishing and downloading which may cause the following reports to be unavailable 
    • SCED and RTD Reports
    • NSA Active and Inactive Constraint Reports
    • State Estimator Reports
    • Real-Time Dynamic Rating Data Reports
    • Wind Power Production - 5 minute Averaged Actual values
    • Solar Power Production - 5 minute Averaged Actual values
  • The Grid and Market Conditions Dashboards and price displays will not be populated.

Note: Start and completion times of this maintenance may be delayed depending on system conditions at that time. A Hotline call to Market Participants will be executed prior to and following completion of the maintenance.

ADDITIONAL INFORMATION: Please review the ERCOT website for previous Market Notices related to this subject.

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

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