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144186CONSTRAINTS02/06/2026 02:03:25 PM
Increase in Heywood from SA to Vic test limit from 550 to 600 MW
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
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
144160INTER-REGIONAL TRANSFER29/05/2026 09:48:13 AM
Inter-regional transfer limit variation - Heywood M1 500/275kV XFMR - VIC region - 29/05/2026
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Heywood M1 500/275kV XFMR - VIC region - 29/05/2026
A planned outage of Heywood M1 500/275kV XFMR in the VIC region was scheduled from 1100 hrs 25/05/2026 to 1800 hrs 29/05/2026.
The outage has been completed and Heywood M1 500/275kV XFMR returned to service at 0920 hrs 29/05/2026
Constraint set(s) revoked: V-HYTX_M12
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Heywood M1 500/275kV XFMR - VIC region - 29/05/2026
A planned outage of Heywood M1 500/275kV XFMR in the VIC region was scheduled from 1100 hrs 25/05/2026 to 1800 hrs 29/05/2026.
The outage has been completed and Heywood M1 500/275kV XFMR returned to service at 0920 hrs 29/05/2026
Constraint set(s) revoked: V-HYTX_M12
Manager NEM Real Time Operations
144142CONSTRAINTS25/05/2026 02:50:50 PM
Updated system normal constraints to manage Murraylink dynamic rating forecast in pre-dispatch and PASA
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 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
144141INTER-REGIONAL TRANSFER25/05/2026 11:34:48 AM
Inter-regional transfer limit variation - Koorangie to Wemen 220 kV Line - VIC region - 25/05/2026
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Koorangie to Wemen 220 kV Line - VIC region - 25/05/2026
At 1130 hrs 25/05/2026 there was a short notice outage of Koorangie to Wemen 220 kV Line.
The following constraint set(s) invoked at 1130 hrs 25/05/2026
V-KOWE
This constraint set(s) contains equations with the following interconnectors on the LHS.
V-S-MNSP1,T-V-MNSP1,V-SA,VIC1-NSW1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Koorangie to Wemen 220 kV Line - VIC region - 25/05/2026
At 1130 hrs 25/05/2026 there was a short notice outage of Koorangie to Wemen 220 kV Line.
The following constraint set(s) invoked at 1130 hrs 25/05/2026
V-KOWE
This constraint set(s) contains equations with the following interconnectors on the LHS.
V-S-MNSP1,T-V-MNSP1,V-SA,VIC1-NSW1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
144139INTER-REGIONAL TRANSFER24/05/2026 01:04:22 PM
Inter-regional transfer limit variation - Tailem Bend 275 kV East Bus - SA region - 24/05/2026
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Tailem Bend 275 kV East Bus - SA region - 24/05/2026
At 1250 hrs 24/05/2026 there was a short notice outage of Tailem Bend 275 kV East Bus.
The following constraint set(s) invoked at 1250 hrs 24/05/2026
S-TB275_E_BUS
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
Inter-regional transfer limit variation - Tailem Bend 275 kV East Bus - SA region - 24/05/2026
At 1250 hrs 24/05/2026 there was a short notice outage of Tailem Bend 275 kV East Bus.
The following constraint set(s) invoked at 1250 hrs 24/05/2026
S-TB275_E_BUS
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
144122INTER-REGIONAL TRANSFER20/05/2026 07:18:48 PM
Inter-regional transfer limit variation - South Morang F2 500/330kV XFMR - VIC region - 20/05/2026
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - South Morang F2 500/330kV XFMR - VIC region - 20/05/2026
The outage has been rescheduled for 0630 hrs 18/05/2026 to 1700 hrs 22/05/2026.
Constraint set(s) invoked: V-SMTX_F_R
This constraint set(s) contains equations with the following interconnectors on the LHS.
T-V-MNSP1,V-SA,VIC1-NSW1,V-S-MNSP1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - South Morang F2 500/330kV XFMR - VIC region - 20/05/2026
The outage has been rescheduled for 0630 hrs 18/05/2026 to 1700 hrs 22/05/2026.
Constraint set(s) invoked: V-SMTX_F_R
This constraint set(s) contains equations with the following interconnectors on the LHS.
T-V-MNSP1,V-SA,VIC1-NSW1,V-S-MNSP1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
144114RESERVE NOTICE18/05/2026 10:16:42 AM
PDPASA - Cancellation of the Forecast Lack Of Reserve Level 1 (LOR1) in the QLD Region on 18/05/2026
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
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
144111RESERVE NOTICE17/05/2026 08:20:51 PM
PDPASA - Update of the Forecast Lack Of Reserve Level 1 (LOR1) in the QLD Region on 18/05/2026
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
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
144109RESERVE NOTICE17/05/2026 02:34:41 PM
ST PASA - Update of the Forecast Lack Of Reserve Level 1 (LOR1) in the QLD Region on 19/01/2026
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
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