Market Notices

AEMO ELECTRICITY MARKET NOTICE

AEMO will increase the Heywood test limit from SA to Vic (from the current 550 MW) to 600 MW today to conduct internetwork testing on Heywood.

The following constraint sets will be revoked once the testing criteria met:
I-SV_HEY_550_TEST

The following constraint sets will be invoked:
I-SV_HEY_600_TEST

AEMO will revert the Heywood test limit back to 550 MW once the test has completed while the test result being analysed.

Please also refer to the published formal PEC Stage 1 and HIC capacity release testing information at the following link: https://aemo.com.au/-/media/files/stakeholder_consultation/consultations/nem-consultations/2023/project-energyconnect-stage-1-and-hic-capacity-release/pec-stage-1-and-hic---final-test-program.pdf?la=en.

Terry Liu
AEMO Operations

Refer to Market Notice 134696

AEMO has now completed the production of the Murraylink dynamic rating forecast model and the forecasting performance has been satisfactory during the test. AEMO will be enabling the pre-dispatch and PASA formulation using the Murraylink dynamic rating forecast on the following two constraint equations at 1000 hrs on Wednesday 27th May 2026.

VSML_RAT_LIM_DYN
SVML_RAT_LIM_DYN

For full details on the formulation, the updated constraint equations have now been loaded into AEMO's pre-production systems.

Terry Liu
AEMO Operations

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR1 condition in the QLD region advised in AEMO Electricity Market Notice No. 144111 is cancelled at 1015 hrs 18/05/2026.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR1 condition in the QLD region advised in AEMO Electricity Market Notice No. 144108 has been updated to the following:

[1.] From 1700 hrs 18/05/2026 to 1900 hrs 18/05/2026.
The forecast capacity reserve requirement is 1194 MW.
The minimum capacity reserve available is 1014 MW.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR1 condition in the QLD region advised in AEMO Electricity Market Notice No. 144092 has been updated to the following:

[1.] From 0600 hrs 19/05/2026 to 1930 hrs 19/05/2026.
The forecast capacity reserve requirement is 1197 MW.
The minimum capacity reserve available is 1012 MW.

[2.] From 2130 hrs 19/05/2026 to 2200 hrs 19/05/2026.
The forecast capacity reserve requirement is 1199 MW.
The minimum capacity reserve available is 1146 MW.


Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

AEMO declares a Forecast LOR1 condition under clause 4.8.4(b) of the National Electricity Rules for the QLD region for the following Periods:


[1.] From 1700 hrs 18/05/2026 to 1930 hrs 18/05/2026.
The forecast capacity reserve requirement is 1194 MW.
The minimum capacity reserve available is 829 MW.


[2.] From 2200 hrs 18/05/2026 to 2230 hrs 18/05/2026.
The forecast capacity reserve requirement is 1197 MW.
The minimum capacity reserve available is 1194 MW.


Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR2 condition in the QLD region advised in AEMO Electricity Market Notice No. 144106 is cancelled at 1400 hrs 17/05/2026.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

AEMO declares a Forecast LOR2 condition under clause 4.8.4(b) of the National Electricity Rules for the QLD region for the following Period:


[1.] From 1700 hrs 18/05/2026 to 1900 hrs 18/05/2026.
The forecast capacity reserve requirement is 759 MW.
The minimum capacity reserve available is 357 MW.


AEMO is seeking a market response.

AEMO has not yet estimated the latest time at which it would need to intervene through an AEMO intervention event.


Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR2 condition in the QLD region advised in AEMO Electricity Market Notice No. 144093 is cancelled at 1030 hrs 17/05/2026.

Manager NEM Real Time Operations