Market Notices

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - TAS region - 10/04/2026

At 1646 hrs the Farrell - Reece No.1 220 kV and Farrell - Reece No.2 220 kV lines tripped.

AEMO did not instruct load shedding.

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

The cause of the trip was identified as due to lightning.

In accordance with SO_OP_3715, the Farrell - Reece No.1 and No.2 220 kV lines are considered vulnerable with a category of probable due to lightning.

At the time of the trip, Farrell - Reece No.1 220 kV and Farrell - Reece No.2 220 kV lines were not reclassified 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 from 16:50 hrs until further notice.

Refer market notice 141010


Manager NEM Real Time Operations

Change Number: CHG0110059

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Cisco IP Phone
Change Title: Telco Outage Notification - Telstra Melbourne Indial (03 9609 XXXX-XXXX)
Change Start Date & Time: 14/04/2026 01:00:00
Change End Date & Time: 14/04/2026 06:00:00
Outage Start Date & Time: 14/04/2026 01:00:00
Outage End Date & Time: 14/04/2026 06:00:00
Environment: Production
Participant Impact and Requirements: Outage Duration:
1 x 15 Minutes during the window

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

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: CHG0110092

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: 16/04/2026 00:00:00
Change End Date & Time: 16/04/2026 06:00:00
Outage Start Date & Time: 16/04/2026 00:00:00
Outage End Date & Time: 16/04/2026 06:00:00
Environment: Production
Participant Impact and Requirements: External/Market

Outage Duration:
2 x 30 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.

Change Number: CHG0108970

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Declared Wholesale Gas Market
Change Title: Planned System Maintenance - Declared Wholesale Gas Market (DWGM) Production
Change Start Date & Time: 14/04/2026 08:00:00
Change End Date & Time: 15/04/2026 18:00:00
Outage Start Date & Time: 14/04/2026 18:30:00
Outage End Date & Time: 14/04/2026 20:30:00
Environment: Production
Participant Impact and Requirements: Dear User,

Please be aware of the DWGM market system outage due to planned maintenance in the Production environment.

The following impacts are expected during the maintenance activities:
- All access to the Declared Wholesale Gas Market Production Systems will be unavailable.


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: CHG0108132

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Gas Supply Hub GSH
Change Title: Gas Supply Hub (GSH) Production Environment Maintenance

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

Change Number: CHG0108542

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MSATS - Market Settlement & Transfer System
Change Title: MSATS 56.2 MSATS and eMDM Maintenance Release

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: Initial
Change Type: Normal
Service/ Component: Declared Wholesale Gas Market
Change Title: DWGM Planned outage for maintenance.
Change Start Date & Time: 07/04/2026 18:30:00
Change End Date & Time: 28/04/2026 20:00:00
Outage Start Date & Time: 07/04/2026 18:30:00
Outage End Date & Time: 07/04/2026 19:30:00
Environment: Production
Participant Impact and Requirements: The DWGM MIBB, WEX and CC auction portal may be disrupted briefly during the window.

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: CHG0106654

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Firewall
Change Title: Planned Maintenance to Norwest Marketnet Firewall

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

Change Number: CHG0109763

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MSATS - Consumer Administration and Transfer Solution(CATS)_PreProd

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