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128218SETTLEMENTS RESIDUE21/07/2025 08:00:28 PM
[EventId:202507212000_NRM_QLD1_NSW1_stopped] NEGRES CONSTRAINT NRM_QLD1_NSW1 ceased operating from 21 July 2025 20:00
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 2000 hrs on 21 July 2025
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 21 July 2025.
Refer to market notice: 128216
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the QLD to NSW directional interconnector.
The negative residue constraint NRM_QLD1_NSW1 ceased operating at 2000 hrs on 21 July 2025.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 2000 hrs on 21 July 2025
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 21 July 2025.
Refer to market notice: 128216
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the QLD to NSW directional interconnector.
The negative residue constraint NRM_QLD1_NSW1 ceased operating at 2000 hrs on 21 July 2025.
This is an AEMO autogenerated Market Notice.
128216SETTLEMENTS RESIDUE21/07/2025 07:00:25 PM
[EventId:202507211900_NRM_QLD1_NSW1_started] NEGRES CONSTRAINT NRM_QLD1_NSW1 started operating from 21 July 2025 19:00
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1900 hrs on 21 July 2025
ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 21 July 2025.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the QLD to NSW directional interconnector.
The negative residue constraint set NRM_QLD1_NSW1 commenced operating from 1900 hrs on 21 July 2025.
This constraint set contains an equation with the following interconnectors on the LHS:
N-Q-MNSP1
NSW1-QLD1
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 1900 hrs on 21 July 2025
ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 21 July 2025.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the QLD to NSW directional interconnector.
The negative residue constraint set NRM_QLD1_NSW1 commenced operating from 1900 hrs on 21 July 2025.
This constraint set contains an equation with the following interconnectors on the LHS:
N-Q-MNSP1
NSW1-QLD1
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
128214SETTLEMENTS RESIDUE21/07/2025 06:30:31 PM
[EventId:202507211830_NRM_VIC1_SA1_stopped] NEGRES CONSTRAINT NRM_VIC1_SA1 ceased operating from 21 July 2025 18:30
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1830 hrs on 21 July 2025
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to SA - 21 July 2025.
Refer to market notice: 128212
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 1830 hrs on 21 July 2025.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1830 hrs on 21 July 2025
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to SA - 21 July 2025.
Refer to market notice: 128212
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 1830 hrs on 21 July 2025.
This is an AEMO autogenerated Market Notice.
128213MARKET SYSTEMS21/07/2025 05:08:02 PM
CHG0104553 - Pre-Prod eMDM Maintenance
Change Number: CHG0104553
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MDM - Meter Data Management_PreProd
Change Title: Pre-Prod eMDM Maintenance 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: MDM - Meter Data Management_PreProd
Change Title: Pre-Prod eMDM Maintenance Release
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
128212SETTLEMENTS RESIDUE21/07/2025 04:30:39 PM
[EventId:202507211630_NRM_VIC1_SA1_started] NEGRES CONSTRAINT NRM_VIC1_SA1 started operating from 21 July 2025 16:30
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1630 hrs on 21 July 2025
ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to SA - 21 July 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 1630 hrs on 21 July 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 1630 hrs on 21 July 2025
ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to SA - 21 July 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 1630 hrs on 21 July 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.
128211MARKET SYSTEMS21/07/2025 04:32:59 PM
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.
CHG0102957|PROD|Enable TLS 1.3 for Gas B2B Hub and disable TLS version 1.0/1.1
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.
128190INTER-REGIONAL TRANSFER19/07/2025 07:35:53 PM
Inter-regional transfer limit variation - Eraring 500kV - Kemps Creek 5A2 500kV Line - NSW region - 19/07/2025
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Eraring500kV - Kemps Creek 5A2 500kV Line - NSW region - 19/07/2025
At 1910 hrs 19/07/2025 there was a short notice outage of Eraring 500kV - Kemps Creek 5A2 500kV Line .
The following constraint set(s) invoked at 1920 hrs 19/07/2025
N-ERKC_ONE
This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q-MNSP1,NSW1-QLD1,VIC1-NSW1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Eraring500kV - Kemps Creek 5A2 500kV Line - NSW region - 19/07/2025
At 1910 hrs 19/07/2025 there was a short notice outage of Eraring 500kV - Kemps Creek 5A2 500kV Line .
The following constraint set(s) invoked at 1920 hrs 19/07/2025
N-ERKC_ONE
This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q-MNSP1,NSW1-QLD1,VIC1-NSW1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
128176INTER-REGIONAL TRANSFER19/07/2025 03:25:24 PM
Inter-regional transfer limit variation - Bulgana-Horsham 220kV LINE - VIC region - 19/07/2025
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Bulgana-Horsham 220kV LINE - VIC region - 19/07/2025
A planned outage of Bulgana-Horsham 220kV LINE in the VIC region was scheduled from 0700 hrs 19/07/2025 to 1730 hrs 19/07/2025.
The outage has been completed and Bulgana-Horsham 220kV LINE returned to service at 1525 hrs 19/07/2025
Constraint set(s) revoked: V-BUHO
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Bulgana-Horsham 220kV LINE - VIC region - 19/07/2025
A planned outage of Bulgana-Horsham 220kV LINE in the VIC region was scheduled from 0700 hrs 19/07/2025 to 1730 hrs 19/07/2025.
The outage has been completed and Bulgana-Horsham 220kV LINE returned to service at 1525 hrs 19/07/2025
Constraint set(s) revoked: V-BUHO
Manager NEM Real Time Operations
128175POWER SYSTEM EVENTS19/07/2025 01:35:42 PM
Non-credible contingency event - TAS region - 19/07/2025
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - TAS region - 19/07/2025
At 1240 hrs the Liapoota - Wadamana - Palmerston 220 kV line and the Cattle Hill Wind Farm - Wadamana 220 kV line tripped.
AEMO did not instruct load shedding.
AEMO has been advised of a 70 MW load reduction at Nyrstar.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
Non-credible contingency event - TAS region - 19/07/2025
At 1240 hrs the Liapoota - Wadamana - Palmerston 220 kV line and the Cattle Hill Wind Farm - Wadamana 220 kV line tripped.
AEMO did not instruct load shedding.
AEMO has been advised of a 70 MW load reduction at Nyrstar.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations