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127945MARKET SYSTEMS04/07/2025 04:21:45 PM
Initial - CHG0102957 - Roll out of TLS 1.3 support for Gas B2B Hub and disable TLS versions 1.0/1.1
Change Number: CHG0102957
Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Gas Hub
Change Title: Roll out of TLS 1.3 support for Gas B2B Hub and disable TLS versions 1.0/1.1
Change Start Date & Time: 03/08/2025 10:00:00
Change End Date & Time: 03/08/2025 14:00:00
Outage Start Date & Time:
Outage End Date & Time:
Environment: Production
Participant Impact and Requirements: The Gas B2B hub servers will be updated to support TLS (Transport Layer Security) 1.3 version. Also the legacy versions 1.0 and 1.1 will be disabled and not be supported going forward. Participants are required to use TLS 1.2 as a minimum protocol to communicate with AEMO, failing to do so will impact the connectivity. An outage is not expected but, there may be some minor interruptions during the change period.
Participants are required to make sure the connectivity is intact post change implementation. In case of any issues noticed, please reach out to AEMO Support Hub.
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.
Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Gas Hub
Change Title: Roll out of TLS 1.3 support for Gas B2B Hub and disable TLS versions 1.0/1.1
Change Start Date & Time: 03/08/2025 10:00:00
Change End Date & Time: 03/08/2025 14:00:00
Outage Start Date & Time:
Outage End Date & Time:
Environment: Production
Participant Impact and Requirements: The Gas B2B hub servers will be updated to support TLS (Transport Layer Security) 1.3 version. Also the legacy versions 1.0 and 1.1 will be disabled and not be supported going forward. Participants are required to use TLS 1.2 as a minimum protocol to communicate with AEMO, failing to do so will impact the connectivity. An outage is not expected but, there may be some minor interruptions during the change period.
Participants are required to make sure the connectivity is intact post change implementation. In case of any issues noticed, please reach out to AEMO Support Hub.
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.
127944MARKET SYSTEMS04/07/2025 02:47:35 PM
Initial - CHG0104481 - Update Shareplex NuTCracker resource allocation
Change Number: CHG0104481
Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Electricity Market Management System_PreProd
Change Title: Update Shareplex NuTCracker resource allocation
Change Start Date & Time: 08/07/2025 10:00:00
Change End Date & Time: 08/07/2025 17:00:00
Outage Start Date & Time: 08/07/2025 10:00:00
Outage End Date & Time: 08/07/2025 12:00:00
Environment: Pre-Production
Participant Impact and Requirements: The Pre-Production Electricity Market Management System(EMMS) ,Frequency Performance Payments (FPP) ,Gas Supply Hub (GSH) will be unavailable during the scheduled outage 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.
Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Electricity Market Management System_PreProd
Change Title: Update Shareplex NuTCracker resource allocation
Change Start Date & Time: 08/07/2025 10:00:00
Change End Date & Time: 08/07/2025 17:00:00
Outage Start Date & Time: 08/07/2025 10:00:00
Outage End Date & Time: 08/07/2025 12:00:00
Environment: Pre-Production
Participant Impact and Requirements: The Pre-Production Electricity Market Management System(EMMS) ,Frequency Performance Payments (FPP) ,Gas Supply Hub (GSH) will be unavailable during the scheduled outage 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.
127921MARKET SYSTEMS03/07/2025 07:55:53 AM
CHG0103089 - ERI & STPASA Recall Period Production Release
Change Number: CHG0103089
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: EMMS - Dispatch
Change Title: ERI & STPASA Recall Period Production Release
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: EMMS - Dispatch
Change Title: ERI & STPASA Recall Period Production Release
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
127907MARKET SYSTEMS01/07/2025 02:59:34 PM
CHG0104394 - Planned maintenance affecting the AEMO Market Network.
Change Number: CHG0104394
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MarketNet
Change Title: Planned maintenance affecting the AEMO Market Network.
Change Start Date & Time: 09/07/2025 07:00:00
Change End Date & Time: 09/07/2025 17:00:00
Outage Start Date & Time:
Outage End Date & Time:
Environment: Production
Participant Impact and Requirements: Planned maintenance will be conducted on the 9th of July 2025, between 07:00AM and 05:00PM AEST on the core network infrastructure within the AEMO Market Network in Brisbane.
During the change, there will be two instances of 1-3 second service disruption to MarketNet Services accessed via Brisbane as traffic moves from the active to the standby load balancing unit. All Services should return to normal after this time. Traffic via Sydney will not be affected during this period. AEMO recommends that all market participants with site-to-site VPN connections currently connected via Brisbane, to switch these connections to the Sydney site as a precaution.
Participants connecting via IPWAN and/or SSL VPN will be automatically connected to the Sydney site and do not need to take any action.
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.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MarketNet
Change Title: Planned maintenance affecting the AEMO Market Network.
Change Start Date & Time: 09/07/2025 07:00:00
Change End Date & Time: 09/07/2025 17:00:00
Outage Start Date & Time:
Outage End Date & Time:
Environment: Production
Participant Impact and Requirements: Planned maintenance will be conducted on the 9th of July 2025, between 07:00AM and 05:00PM AEST on the core network infrastructure within the AEMO Market Network in Brisbane.
During the change, there will be two instances of 1-3 second service disruption to MarketNet Services accessed via Brisbane as traffic moves from the active to the standby load balancing unit. All Services should return to normal after this time. Traffic via Sydney will not be affected during this period. AEMO recommends that all market participants with site-to-site VPN connections currently connected via Brisbane, to switch these connections to the Sydney site as a precaution.
Participants connecting via IPWAN and/or SSL VPN will be automatically connected to the Sydney site and do not need to take any action.
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.
127877MARKET SYSTEMS27/06/2025 09:08:43 AM
CHG0103089 - ERI & STPASA Recall Period Production Release
Change Number: CHG0103089
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: EMMS - Dispatch
Change Title: ERI & STPASA Recall Period Production Release
Change Start Date & Time: 30/06/2025 09:00:00
Change End Date & Time: 04/07/2025 18:00:00
Outage Start Date & Time: 30/06/2025 11:45:00
Outage End Date & Time: 30/06/2025 11:55:00
Environment: Production
Participant Impact and Requirements: Under this change, AEMO will upgrade the NEMDE solver used in Production for Dispatch, 5-Minute Predispatch, Predispatch and PD7 to a new version. AEMO will also upgrade other relevant applications for Dispatch, 5-Minute Predispatch, Predispatch, PD7, Bidding, SOMMS and?Registration. This change will become effective upon rule commencement on 1 July, 2025
Impact : A Planned outage for BIDDING application is scheduled on 30th June 2025 between 11:45 AM and 11:55 AM. The application will be unavailable for approximately 5-7 min during this 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.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: EMMS - Dispatch
Change Title: ERI & STPASA Recall Period Production Release
Change Start Date & Time: 30/06/2025 09:00:00
Change End Date & Time: 04/07/2025 18:00:00
Outage Start Date & Time: 30/06/2025 11:45:00
Outage End Date & Time: 30/06/2025 11:55:00
Environment: Production
Participant Impact and Requirements: Under this change, AEMO will upgrade the NEMDE solver used in Production for Dispatch, 5-Minute Predispatch, Predispatch and PD7 to a new version. AEMO will also upgrade other relevant applications for Dispatch, 5-Minute Predispatch, Predispatch, PD7, Bidding, SOMMS and?Registration. This change will become effective upon rule commencement on 1 July, 2025
Impact : A Planned outage for BIDDING application is scheduled on 30th June 2025 between 11:45 AM and 11:55 AM. The application will be unavailable for approximately 5-7 min during this 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.
127866SETTLEMENTS RESIDUE25/06/2025 05:20:24 PM
[EventId:202506251720_NRM_VIC1_SA1_stopped] NEGRES CONSTRAINT NRM_VIC1_SA1 ceased operating from 25 June 2025 17:20
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1720 hrs on 25 June 2025
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to SA - 25 June 2025.
Refer to market notice: 127856
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the VIC to SA directional interconnector.
The negative residue constraint NRM_VIC1_SA1 ceased operating at 1720 hrs on 25 June 2025.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1720 hrs on 25 June 2025
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to SA - 25 June 2025.
Refer to market notice: 127856
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the VIC to SA directional interconnector.
The negative residue constraint NRM_VIC1_SA1 ceased operating at 1720 hrs on 25 June 2025.
This is an AEMO autogenerated Market Notice.
127856SETTLEMENTS RESIDUE25/06/2025 03:35:15 PM
[EventId:202506251535_NRM_VIC1_SA1_started] NEGRES CONSTRAINT NRM_VIC1_SA1 started operating from 25 June 2025 15:35
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1535 hrs on 25 June 2025
ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to SA - 25 June 2025.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the VIC to SA directional interconnector.
The negative residue constraint set NRM_VIC1_SA1 commenced operating from 1535 hrs on 25 June 2025.
This constraint set contains an equation with the following interconnectors on the LHS:
V-S-MNSP1
V-SA
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1535 hrs on 25 June 2025
ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to SA - 25 June 2025.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the VIC to SA directional interconnector.
The negative residue constraint set NRM_VIC1_SA1 commenced operating from 1535 hrs on 25 June 2025.
This constraint set contains an equation with the following interconnectors on the LHS:
V-S-MNSP1
V-SA
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
127835MARKET SYSTEMS25/06/2025 09:48:25 AM
CHG0103089 - ERI & STPASA Recall Period Production Release
Change Number: CHG0103089
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: EMMS - Dispatch
Change Title: ERI & STPASA Recall Period Production Release
Change Start Date & Time: 30/06/2025 09:00:00
Change End Date & Time: 04/07/2025 18:00:00
Outage Start Date & Time: 30/06/2025 11:45:00
Outage End Date & Time: 30/06/2025 11:55:00
Environment: Production
Participant Impact and Requirements: Under this change, AEMO will upgrade the NEMDE solver used in Production for Dispatch, 5-Minute Predispatch, Predispatch and PD7 to a new version. AEMO will also upgrade other relevant applications for Dispatch, 5-Minute Predispatch, Predispatch, PD7, Bidding, SOMMS and?Registration. This change will become effective upon rule commencement on 1 July, 2025
Impact : A Planned outage for BIDDING application is scheduled on 30th June 2025 between 11:45 AM and 11:55 AM. The application will be unavailable for approximately 5-7 min during this 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.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: EMMS - Dispatch
Change Title: ERI & STPASA Recall Period Production Release
Change Start Date & Time: 30/06/2025 09:00:00
Change End Date & Time: 04/07/2025 18:00:00
Outage Start Date & Time: 30/06/2025 11:45:00
Outage End Date & Time: 30/06/2025 11:55:00
Environment: Production
Participant Impact and Requirements: Under this change, AEMO will upgrade the NEMDE solver used in Production for Dispatch, 5-Minute Predispatch, Predispatch and PD7 to a new version. AEMO will also upgrade other relevant applications for Dispatch, 5-Minute Predispatch, Predispatch, PD7, Bidding, SOMMS and?Registration. This change will become effective upon rule commencement on 1 July, 2025
Impact : A Planned outage for BIDDING application is scheduled on 30th June 2025 between 11:45 AM and 11:55 AM. The application will be unavailable for approximately 5-7 min during this 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.
127834GENERAL NOTICE25/06/2025 08:54:58 AM
Planned outage of Kiamal SF-Red Cliffs 220kV LINE in the VIC region on 27/06/2025
AEMO ELECTRICITY MARKET NOTICE
The Kiamal SF-Red Cliffs 220kV LINE line in the Victorian (VIC) region is planned to be out of service from 0700 hrs on 27/06/2025 to 1630 hrs on 27/06/2025.
A credible contingency event during this planned outage may require:
* Load shedding in the Victorian outer grid; and/ or
* Market intervention, such as the issuing of directions.
Refer AEMO Network Outage Schedule (NOS) for further details.
AEMO Operations
The Kiamal SF-Red Cliffs 220kV LINE line in the Victorian (VIC) region is planned to be out of service from 0700 hrs on 27/06/2025 to 1630 hrs on 27/06/2025.
A credible contingency event during this planned outage may require:
* Load shedding in the Victorian outer grid; and/ or
* Market intervention, such as the issuing of directions.
Refer AEMO Network Outage Schedule (NOS) for further details.
AEMO Operations