Market Notices

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: TAS1

Lines: Burnie - Port Latta - Smithton 1 110kV and Burnie - Port Latta - Smithton 2 110kV

Duration: 03/05/2026 11:56 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR1 condition in the TAS region advised in AEMO Electricity Market Notice No. 144025 is cancelled at 1500 hrs 02/05/2026.

Manager NEM Real Time Operations

Change Number: CHG0110288

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MSATS - Market Settlement & Transfer System
Change Title: MSATS 56.2 BAU and PMS Release
Change Start Date & Time: 10/05/2026 10:00:00
Change End Date & Time: 10/05/2026 14:00:00
Outage Start Date & Time: 10/05/2026 10:00:00
Outage End Date & Time: 10/05/2026 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

AEMO declares a Forecast LOR1 condition under clause 4.8.4(b) of the National Electricity Rules for the TAS region for the following period:

[1.] From 0730 hrs 05/05/2026 to 0800 hrs 05/05/2026.
The forecast capacity reserve requirement is 577 MW.
The minimum capacity reserve available is 561 MW.

AEMO Operations

AEMO ELECTRICITY MARKET NOTICE

Following a review of the operation of the Very Fast FCAS market, from 5th May 2026 AEMO will increase the cap on dispatch of Very Fast Contingency FCAS in the QLD region from 200 MW to 250 MW, during periods where islanding of the QLD region is considered credible.

No other changes to the dispatch of Very Fast FCAS or FCAS constraint equations will be made on this date.

For more information on the Fast Frequency Response (FFR) initiative, please visit:
https://www.aemo.com.au/initiatives/major-programs/fast-frequency-response

AEMO Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Dumaresq-Sapphire (8J) 330 kV Line - NSW region - 01/05/2026

A planned outage of Dumaresq-Sapphire (8J) 330 kV Line in the NSW region was scheduled from 1430 hrs 01/05/2026 to 1530 hrs 01/05/2026.

The outage has been rescheduled for 0940 hrs 01/05/2026 to 1040 hrs 01/05/2026.

The following constraint set(s) invoked at 0940 hrs 01/05/2026
N-DMSR_8J
N-X_8J+DM+TW_SVC
N-SAPHWF1_ZERO

This constraint set(s) contains equations with the following interconnectors on the LHS.
NSW1-QLD1,T-V-MNSP1,N-Q-MNSP1,V-S-MNSP1,V-SA

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE NSW1 Region Friday, 1 May 2026

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

Unit: BW03
Duration: 01/05/2026 05:10 to 01/05/2026 05:15
Amount: -80 MW
Constraint: NC-N_BW03

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE VIC1 Region Thursday, 30 April 2026

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

Unit: RYANCWF1
Duration: 30/04/2026 13:15 to 30/04/2026 13:25
Amount: 15 MW
Constraint: NC-V_RYANCWF1

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: Tumoulin - Woree No.877 275 kV and Chalumbin - Turkinje No.7166 132 kV

Cancellation time: 30/04/2026 01:19

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 144016

Auto-generated on behalf of Manager NEM Real Time Operations