Market Notices

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE NSW1 Region Friday, 8 August 2025

AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:

Unit: WTAHB1
Duration: 08/08/2025 09:35 to 08/08/2025 09:45
Amount: 140 MW
Constraint: NC-N_WTAHB1

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - APD A2 500/220 kV Transformer - VIC region - 07/08/2025

At 1734 hrs 07/08/2025 there was an unplanned outage of APD A2 500/220 kV Transformer

The following constraint set(s) invoked at 1750 hrs 07/08/2025
F-I_ML_APD_LOAD

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

Change Number: CHG0105078

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

Change Title: Pre-Prod MSATS Maintenance Release for webMethods 11.1 upgrade

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

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Red Cliffs - Wemen 220kV LINE and Koorangie - Wemen 220kV LINE - VIC region - 06/08/2025

A planned outage of Red Cliffs - Wemen 220kV LINE and Koorangie - Wemen 220kV LINE in the VIC region was scheduled from 0700 hrs 06/08/2025 to 1800 hrs 06/08/2025.

The outage has been completed and Red Cliffs - Wemen 220kV LINE and Koorangie - Wemen 220kV LINE returned to service at 0945 hrs 06/08/2025

Constraint set(s) revoked: V-KO_WE_RC

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - South East 275 kV No. 2 SVC - SA region - 05/08/2025

At 2036 hrs 05/08/2025 there was an unplanned outage of South East 275 kV No. 2 SVC.

The following constraint set(s) invoked at 2045 hrs 05/08/2025
S-SE_VC1

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

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE SA1 Region Tuesday, 5 August 2025

AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:

Unit: HPR1
Duration: 05/08/2025 16:50 to 05/08/2025 16:55
Amount: 13 MW
Constraint: NC-S_HPR1

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Issued by Australian Energy Market Operator Ltd at 2000 hrs on 4 August 2025

CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to SA - 4 August 2025.

Refer to market notice: 128433

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 2000 hrs on 4 August 2025.

This is an AEMO autogenerated Market Notice.

AEMO ELECTRICITY MARKET NOTICE

Issued by Australian Energy Market Operator Ltd at 1900 hrs on 4 August 2025

ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to SA - 4 August 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 1900 hrs on 4 August 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.

Change Number: CHG0104554

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MDM - Meter Data Management
Change Title: Production eMDM Maintenance Release

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