AEMO issues Market Notice ‘Update to Negative Settlement Residue constraint equations’

On Wednesday 19th November 2025, the AEMO issued MN130792 at 15:36 (NEM time) as follows:

‘——————————————————————-
MARKET NOTICE
——————————————————————-

From :              AEMO
To   :              NEMITWEB1
Creation Date :     19/11/2025     15:36:55

——————————————————————-

Notice ID               :         130792
Notice Type ID          :         CONSTRAINTS
Notice Type Description :         New/Modified Constraints
Issue Date              :         19/11/2025
External Reference      :         Update to Negative Settlement Residue constraint equations

——————————————————————-

Reason :

AEMO ELECTRICITY MARKET NOTICE

The final report on the consultation for negative settlement residues was published today. One recommendation from the consultation was to change the negative settlement residue constraint equations to manage the “cycling” issue in the clamping process.

The following constraint equations have now been updated to align with the recommendation:
NRM_NSW1_QLD1
NRM_NSW1_VIC1
NRM_QLD1_NSW1
NRM_SA1_VIC1
NRM_VIC1_NSW1
NRM_VIC1_SA1

For more information on this please refer to the consultation documents which is available here:
https://www.aemo.com.au/consultations/current-and-closed-consultations/automation-of-negative-residue-management-for-the-implementation-of-transmission-loops

Ben Blake
AEMO Operations

——————————————————————-
END OF REPORT
——————————————————————-’

We thought would be useful to add to articles tagged with Negative Residue Management (NRM).  That URL above now references the two documents published today:

• Final Report on ‘Consultation on automation of negative residue management for the implementation of transmission loops’; and
• Version 4.0 of ‘Guide to the Automation of Negative Residue Management’

Here they are: