Market Notices

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - QLD region - 19/02/2026

At 1650 hrs the Goonyella - North Goonyella Tee - Stoney Creek No. 7122 and Goonyella - Newlands No. 7155 132 kV Lines tripped.

AEMO did not instruct load shedding.

AEMO has been advised of 36 MW of bulk electrical load disconnection.

The cause of this non credible contingency event is not known at this stage.


Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - NSW region - 19/02/2026

At 0931 hrs the Stockdill - Upper Tumut No 1 330kV line opened at the Stockdill end only.

AEMO did not instruct load shedding.

AEMO has not been advised of any disconnection of bulk electrical load.

The cause of this non credible contingency event is not known at this stage.


Manager NEM Real Time Operations

Change Number: CHG0109079

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Windows Server
Change Title: Planned Preproduction System Maintenance - Short Term Trading Market (STTM)

Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.

Change Number: CHG0105738

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MDM - Meter Data Management
Change Title: eMDM Lifecycle Maintenance Release
Change Start Date & Time: 22/02/2026 10:00:00
Change End Date & Time: 22/02/2026 20:00:00
Outage Start Date & Time: 22/02/2026 10:00:00
Outage End Date & Time: 22/02/2026 18:00:00
Environment: Production
Participant Impact and Requirements: Users will not be able to access MSATS during the outage period.

Meter data processing and RM reports will not be available during the outage period.

User Rights Management (URM) will continue to operate, however the administration screens will not be accessible.

MSATS B2B/B2M Transactions and B2B MSATS Screens will be unavailable during this outage

NMI Discovery will not be available during the outage period.

Network Outage Scheduler (NOS) B2B Transactions submitted via FTP will not be processed during this outage period. The NOS application will still be available.

CDR and CDP will not be available during the outage period.

Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.

Change Number: CHG0108573

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: EMMS - Dispatch
Change Title: NEM Dispatch Engine (NEMDE) ? Scheduled Maintenance Activity
Change Start Date & Time: 19/02/2026 08:00:00
Change End Date & Time: 19/02/2026 18:00:00
Outage Start Date & Time: 19/02/2026 10:00:12
Outage End Date & Time: 19/02/2026 17:00:25
Environment: Production
Participant Impact and Requirements: We will be conducting maintenance on the NEM Dispatch Engine (NEMDE) during the implementation window. No outages or service disruptions are expected.

Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.

Change Number: CHG0108572

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: EMMS - Dispatch
Change Title: NEM Dispatch Engine (NEMDE) ? Scheduled Maintenance Activity

Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.

Change Number: CHG0109079

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Windows Server
Change Title: Planned Preproduction System Maintenance - Short Term Trading Market (STTM)
Change Start Date & Time: 18/02/2026 15:00:00
Change End Date & Time: 18/02/2026 16:00:00
Outage Start Date & Time: 13/02/2026 15:00:00
Outage End Date & Time: 13/02/2026 16:00:00
Environment: Pre-Production
Participant Impact and Requirements: Planned Preproduction System Maintenance - Short Term Trading Market (STTM)

Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.

Change Number: CHG0108857

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Declared Wholesale Gas Market (DWGM)
Change Title: Maintenance activities to be performed on the Declared Wholesale Gas Market Systems Pre-Production.

Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.

Change Number: CHG0108572

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: EMMS - Dispatch
Change Title: NEM Dispatch Engine (NEMDE) - Scheduled Maintenance Activity
Change Start Date & Time: 12/02/2026 08:00:00
Change End Date & Time: 12/02/2026 18:00:00
Outage Start Date & Time:
Outage End Date & Time:
Environment: Production
Participant Impact and Requirements: We will be conducting maintenance on the NEM Dispatch Engine (NEMDE) during the implementation window. No outages or service disruptions are expected.

Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.