Market Notices

AEMO ELECTRICITY MARKET NOTICE

A network augmentation has been commissioned in the QLD region at 1433 hrs 25/11/2025 as follows:

H97 Aurumfield 275 kV Substation
H93 Guybal Munjan - H97 Aurumfield 8918 275 kV Transmission Line

Manager NEM Real Time Operations

CHG0104603

Change Number: CHG0104603

Notification issued to: Market Notice
Notification Type: Outage Completed
Change Type: Normal
Service/ Component: Identity Service (IDS)
Environment: Production

Participant Impact and Requirements: Identity Service in Production is used by multiple systems in Production environment for user authorisation and authentication.

Identity Service is mostly used by the following Production systems:
* MSATS Prod
* APIs (EMMS, GBB, MSATS etc) in Prod
* EMMS Bids (FTP, API, and Web)
* WEM Prod
* Internal / Markets Portal Services in Prod


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.

Update - Lightning vulnerable lines in Qld region

Refer to AEMO Electricity Market Notice 130922 and 130953.

At 1334 hrs on 24/11/2025 the Terranora - Mudgeeraba H4 757 110kV and the Terranora - Mudgeeraba H4 758 110kV lines tripped and auto-reclosed.

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

In accordance with SO_OP_3715, AEMO now considers the the Terranora - Mudgeeraba H4 757 110kV and the Terranora - Mudgeeraba H4 758 110kV lines to be vulnerable with a category of probable due to lightning.

Manager NEM Real Time Operations

CHG0104603

Change Number: CHG0104603

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Identity Service (IDS)
Change Title: Identity Service Production Upgrade
Change Start Date & Time: 24/11/2025 08:00:00
Change End Date & Time: 26/11/2025 22:00:00
Outage Start Date & Time: 24/11/2025 15:15:00
Outage End Date & Time: 24/11/2025 15:45:00
Environment: Production

Participant Impact and Requirements: Identity Service in Production is used by multiple systems in Production environment for user authorisation and authentication.

Identity Service is mostly used by the following Production systems:
* MSATS Prod
* APIs (EMMS, GBB, MSATS etc) in Prod
* EMMS Bids (FTP, API, and Web)
* WEM Prod
* Internal / Markets Portal Services in Prod


Identity Service upgrade in Production may cause users to experience performance degradations for login and authentication requests initiated. Users may experience session issues for logins initiated between 15:15 PM to 15: 45 PM AEST on 24/Nov/2025 for any of above services; however, we do not anticipate any com-plete outages.

As part of the Identity Service uplift activities, changes will be implemented to both the Markets Portal and the Internal Portal. Consequently, there is a possibility of intermittent outages affecting Internal Portal and Market Portal between 15:30 PM and 16:00 PM AEST.


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: CHG0104603

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Identity Service (IDS)
Change Title: Identity Service Production Upgrade
Change Start Date & Time: 24/11/2025 08:00:00
Change End Date & Time: 26/11/2025 22:00:00
Outage Start Date & Time: 24/11/2025 13:45:00
Outage End Date & Time: 24/11/2025 14:15:00
Environment: Production

Participant Impact and Requirements: Identity Service in Production is used by multiple systems in Production environment for user authorisation and authentication.

Identity Service is mostly used by the following Production systems:
* MSATS Prod
* APIs (EMMS, GBB, MSATS etc) in Prod
* EMMS Bids (FTP, API, and Web)
* WEM Prod
* Internal / Markets Portal Services in Prod

Identity Service upgrade in Production may cause users to experience performance degradations for login and authentication requests initiated. Users may experience session issues for logins initiated between 14:30 PM to 15:00 PM AEST on 24/Nov/2025 for any of above services; however, we do not anticipate any complete outages.

As part of the Identity Service uplift activities, changes will be implemented to both the Markets Portal and the Internal Portal. Consequently, there is a possibility of intermittent outages affecting Internal Portal and Market Portal between 14:45 PM and 15:15 PM AEST.

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's weather service provider has issued forecast temperatures equal to or greater than the NEM Local Temperature Alert Levels for listed weather stations below.

QLD
Dalby Ap (37+ Deg C): 24th Nov, 25th Nov, 28th Nov
Rockhampton Ap (39+ Deg C): 25th Nov

SA
Port Augusta Ap (39+ Deg C): 24th Nov

The NEM Local Temperature Alert Levels are:

Launceston Ti Tree Bend: 33 Deg C, Dalby Airport: 37 Deg C, for all other selected weather stations: 39 Deg C.

AEMO requests Market Participants to:

1. review the weather forecast in the local area where their generating units / MNSP converter stations are located and,

2. if required, update the available capacity in their dispatch offers or availability submissions consistent with the forecast temperatures.

Further information is available at:

https://aemo.com.au/energy-systems/electricity/national-electricity-market-nem/nem-forecasting-and-planning/forecasting-and-reliability/projected-assessment-of-system-adequacy/nem-local-temperature-alerts

AEMO Operations Planning

Change Number: CHG0107963

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Windows Server
Change Title: Maintenance activities to be performed on the Gas Short Term Trading Market Systems Pre-Production.
Change Start Date & Time: 25/11/2025 08:00:00
Change End Date & Time: 25/11/2025 17:30:00
Outage Start Date & Time: 25/11/2025 09:00:00
Outage End Date & Time: 25/11/2025 13:30:00
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.

Change Number: CHG0105591

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MSATS - Consumer Administration and Transfer Solution(CATS)
Change Title: MSATS 55.3 MSR Phase 2 Go-Live
Change Start Date & Time: 30/11/2025 10:00:00
Change End Date & Time: 30/11/2025 14:00:00
Outage Start Date & Time: 30/11/2025 10:00:00
Outage End Date & Time: 30/11/2025 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.

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

NMI Discovery will not be available during the outage period.

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: CHG0107147

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MarketNet
Change Title: Planned maintenance affecting the AEMO Market Network.

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