Market Notices

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Mullumbimby - Dunoon - Lismore 132 kV 9U6 line - NSW region - 29/03/2025

At 0427 hrs 29/03/2025 there was an unplanned outage of Mullumbimby - Dunoon - Lismore 132 kV 9U6 line.

The following constraint set(s) invoked at 0435 hrs 29/03/2025
N-LSDU_9U6

This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q-MNSP1

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

Change Number: CHG0102344

Notification issued to: Market Notice
Notification Type: Initial
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.
Change Start Date & Time: 02/04/2025 08:00:00
Change End Date & Time: 02/04/2025 17:30:00
Outage Start Date & Time: 02/04/2025 09:00:00
Outage End Date & Time: 02/04/2025 12:00:00
Environment: Pre-Production
Participant Impact and Requirements: This is a regular procedure to allow routine maintenance. short service outages over the day for DWGM services, includiing MIBB and Web Exchanger.

Pre-Production Declared Wholesale Gas Market Systems (DWGM)

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: CHG0101896

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Electricity Market Management System_PreProd
Change Title: EMMS Pre-Production Systems will be transferred to the alternative datacentre for maintenance activities .
Change Start Date & Time: 01/04/2025 08:00:00
Change End Date & Time: 11/04/2025 17:00:00
Outage Start Date & Time: 03/04/2025 08:00:00
Outage End Date & Time: 03/04/2025 22:00:00
Environment: Pre-Production
Participant Impact and Requirements: EMMS Pre-Production Systems will be transferred to the alternative datacentre for maintenance activities. Maintenance activities will be conducted on the following dates:
1/04/2025
3/04/2025
8/04/2025

During the window,FPP calculations may be delayed at various points.

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: CHG0101950

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Cisco IP Phone
Change Title: Telco Outage Notification - Telstra Brisbane Indial (07 3347 XXXX-XXXX)
Change Start Date & Time: 01/04/2025 01:00:00
Change End Date & Time: 01/04/2025 06:00:00
Outage Start Date & Time: 01/04/2025 01:00:00
Outage End Date & Time: 01/04/2025 06:00:00
Environment: Production
Participant Impact and Requirements: External/Market

Outage Duration:
1 x 15 minutes during the window

Impacts:
Reduced redundancy for Inbound and Outbound Calls (automatically rerouted via Sydney).

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

Inter-regional transfer limit variation - Hazelwood -South Morang No.1 500 kV line - VIC region - 27/03/2025

At 1150 hrs 27/03/2025 there was a short notice outage of Hazelwood -South Morang No.1 500 kV line.

The following constraint set(s) invoked at 1150 hrs 27/03/2025
V-HWSM

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

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

In order to maintain the power system in a secure operating state in the NSW region, AEMO has invoked automated constraint set CA_SYDS_56F70932 from 0820 hrs until further notice.

This constraint set contains equations with the following interconnector on the LHS;

VIC1-NSW1

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Palmerston A 220kV Bus - TAS region - 26/03/2025

Refer to Market Notice 125962.

The following constraint set(s) invoked from 1600 hrs to 1620 hrs 26/03/2026.
T-LIPM_WACB
T-LIPM_WACB_SL_N-2


This constraint set(s) contains equations with the following interconnectors on the LHS.
T-V-MNSP1

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - TAS region - 26/03/2025

At 1551 hrs the Palmerston A 220kV Bus tripped.

AEMO did not instruct load shedding.

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

Approximately 40MW of generation was disconnected.

The cause of this non credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.

AEMO will not reclassify this event as a credible contingency event.


Manager NEM Real Time Operations

Change Number: CHG0102325

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Short Term Trading Market (STTM)
Change Title: Maintenance activities to be performed on the Gas Short Term Trading Market Systems Pre-Production.
Change Start Date & Time: 31/03/2025 08:00:00
Change End Date & Time: 31/03/2025 17:30:00
Outage Start Date & Time:
Outage End Date & Time:
Environment: Pre-Production
Participant Impact and Requirements: This is a regular procedure to allow routine maintenance. Short service outages over the day for STTM services including SWEX and MIS.

Pre-Production Gas 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 .