NOTICE DATE: May 3, 2024

NOTICE TYPE: M-B050324-01 Retail/Wholesale

SHORT DESCRIPTION: Planned system maintenance with impacted services

INTENDED AUDIENCE: All Market Participants

DAYS AFFECTED: May 16, 2024

LONG DESCRIPTION: ERCOT will be performing planned system maintenance of Energy and Market Management systems (EMS, MMS, ITRON and EIN) applications and databases on May 16, 2024 during a maintenance window of 15:25 – 18:00.

During the maintenance period on May 16, 2024, 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 timeframe  
• Base Points from SCED may not be created for 3 SCED intervals during the 15:25 to 15:55 timeframe. 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
  • SOL Exceedance Report
• The Public Dashboards and ERCOT.com 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.

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 ClientServices@ercot.com.

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