Market Notices

Change Number: CHG0110463

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MSATS - Market Settlement & Transfer System
Change Title: MSATS 57.0 Flexible Trading Arrangement (FTA Release 1)

Change Start Date & Time: 31/05/2026 10:00:00
Change End Date & Time: 31/05/2026 14:00:00
Outage Start Date & Time: 31/05/2026 10:00:00
Outage End Date & Time: 31/05/2026 14:00:00
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.

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE QLD1 Region Friday, 22 May 2026

AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:

Unit: MPP_2
Duration: 22/05/2026 10:55 to 22/05/2026 11:05
Amount: 11 MW
Constraint: NC-Q_MPP_2

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE QLD1 Region Thursday, 21 May 2026

AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:

Unit: STAN-4
Duration: 21/05/2026 08:45 to 21/05/2026 08:50
Amount: 15 MW
Constraint: NC-Q_STAN-4

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.

Region: QLD1

Lines: Mudgeeraba - Terranora No.757 110 kV and Mudgeeraba - Terranora No.758 110 kV

Cancellation time: 20/05/2026 22:44

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 144123

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE QLD1 Region Wednesday, 20 May 2026

AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:

Unit: SWANBBF1
Duration: 20/05/2026 21:25 to 20/05/2026 21:30
Amount: -117 MW
Constraint: NC-Q_SWANBBF1

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.

Region: QLD1

Lines: Mudgeeraba - Terranora No.757 110 kV and Mudgeeraba - Terranora No.758 110 kV

Duration: 20/05/2026 20:39 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - South Morang F2 500/330kV XFMR - VIC region - 20/05/2026

The outage has been rescheduled for 0630 hrs 18/05/2026 to 1700 hrs 22/05/2026.

Constraint set(s) invoked: V-SMTX_F_R

This constraint set(s) contains equations with the following interconnectors on the LHS.
T-V-MNSP1,V-SA,VIC1-NSW1,V-S-MNSP1

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

Change Number: CHG0108533

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Declared Wholesale Gas Market
Change Title: DWGM Planned outage for maintenance.

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

Change Number: CHG0109969

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Declared Wholesale Gas Market
Change Title: DWGM Planned outage for maintenance.

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