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144083CONSTRAINTS15/05/2026 11:20:34 AM
Updated maximum generation contingency size in Victoria from 600 MW to 750 MW
VicGrid has conducted studies and determined that the maximum generation contingency size in Victoria can be increased from 600 MW to 750 MW.
This change affects the generator limitations for prior outage conditions especially in the South-west Victoria area. The new generation limitation for outages is now 750 MW. AEMO has implemented this change in production on 13th May 2026 by updating generation constraints to increase the generation upper limits for outage conditions.
Please refer to the Network Outage Schedule for any upcoming outages in south-west Victoria here.
https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/data-nem/network-data/network-outage-schedule
For further details on this change please refer to VicGrid Limits Advice or contact VicGrid.
vicgrid.com.au/transmission-planning/planning-the-energy-grid
Terry Liu
AEMO Operations
This change affects the generator limitations for prior outage conditions especially in the South-west Victoria area. The new generation limitation for outages is now 750 MW. AEMO has implemented this change in production on 13th May 2026 by updating generation constraints to increase the generation upper limits for outage conditions.
Please refer to the Network Outage Schedule for any upcoming outages in south-west Victoria here.
https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/data-nem/network-data/network-outage-schedule
For further details on this change please refer to VicGrid Limits Advice or contact VicGrid.
vicgrid.com.au/transmission-planning/planning-the-energy-grid
Terry Liu
AEMO Operations
144082NON-CONFORMANCE15/05/2026 01:40:14 AM
NON-CONFORMANCE Region NSW1 Friday, 15 May 2026
AEMO ELECTRICITY MARKET NOTICE
NON-CONFORMANCE NSW1 Region Friday, 15 May 2026
AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:
Unit: BW04
Duration: 15/05/2026 01:30 to 15/05/2026 01:40
Amount: -28 MW
Constraint: NC-N_BW04
Auto-generated on behalf of Manager NEM Real Time Operations
NON-CONFORMANCE NSW1 Region Friday, 15 May 2026
AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:
Unit: BW04
Duration: 15/05/2026 01:30 to 15/05/2026 01:40
Amount: -28 MW
Constraint: NC-N_BW04
Auto-generated on behalf of Manager NEM Real Time Operations
144081MARKET INTERVENTION14/05/2026 02:21:55 PM
Cancellation - AEMO Intervention Event - SA region 14/05/2026
AEMO ELECTRICITY MARKET NOTICE
Cancellation - AEMO Intervention Event - SA region 14/05/2026
Refer to Market Notice 144079
The AEMO Intervention Event and all associated directions are cancelled from 1420 hrs on 14/05/2026.
Manager NEM Real Time Operations
Cancellation - AEMO Intervention Event - SA region 14/05/2026
Refer to Market Notice 144079
The AEMO Intervention Event and all associated directions are cancelled from 1420 hrs on 14/05/2026.
Manager NEM Real Time Operations
144080MARKET INTERVENTION14/05/2026 02:21:55 PM
Cancellation: Direction issued to: Origin Energy Electricity Limited - QUARANTINE PS UNIT 5
AEMO ELECTRICITY MARKET NOTICE
Cancellation: Direction issued to: Origin Energy Electricity Limited - QUARANTINE PS UNIT 5
Refer to Market Notice 144078
Direction is cancelled from: 1420 hrs 14/05/2026
Manager NEM Real Time Operations
Cancellation: Direction issued to: Origin Energy Electricity Limited - QUARANTINE PS UNIT 5
Refer to Market Notice 144078
Direction is cancelled from: 1420 hrs 14/05/2026
Manager NEM Real Time Operations
144079MARKET INTERVENTION14/05/2026 12:57:56 PM
Direction - SA region 14/05/2026
AEMO ELECTRICITY MARKET NOTICE
Direction - SA region 14/05/2026
In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
The issue of the direction commences an AEMO intervention event. AEMO declares all trading intervals during the event to be intervention trading intervals, commencing from the interval ending 1300 hrs on 14/05/2026.
Intervention pricing does not apply to this AEMO intervention event.
AEMO may issue or revoke additional directions in order to meet the current requirement, unless sufficient market response is provided. A further market notice will be issued when all directions related to this requirement have been cancelled.
Manager NEM Real Time Operations
Direction - SA region 14/05/2026
In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
The issue of the direction commences an AEMO intervention event. AEMO declares all trading intervals during the event to be intervention trading intervals, commencing from the interval ending 1300 hrs on 14/05/2026.
Intervention pricing does not apply to this AEMO intervention event.
AEMO may issue or revoke additional directions in order to meet the current requirement, unless sufficient market response is provided. A further market notice will be issued when all directions related to this requirement have been cancelled.
Manager NEM Real Time Operations
144078MARKET INTERVENTION14/05/2026 12:57:15 PM
Direction - in SA region to Origin Energy Electricity Limited - QUARANTINE PS UNIT 5
AEMO ELECTRICITY MARKET NOTICE
Direction - in SA region to Origin Energy Electricity Limited - QUARANTINE PS UNIT 5
Refer to Market Notice 144079
In accordance with section 116 of the National Electricity Law, AEMO is issuing a direction to Origin Energy Electricity Limited. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
Direction issued to: Origin Energy Electricity Limited - QUARANTINE PS UNIT 5 at 1255 hrs 14/05/2026
Type of resource: generating unit
Required actions: Synchronise and follow dispatch targets at 1320 hrs 14/05/2026
Services provided: Voltage Control
Circumstances necessitating the Direction: Voltage
Circumstances necessitating the Direction additional detail: The synchronous generating units currently expected to be synchronised in SA will be inadequate to maintain sufficient Voltage Control in SA. Intervention is required to maintain the power system in a secure operating state
Expected duration: 1420 hrs 14/05/2026.
Origin Energy Electricity Limited does not incur any civil monetary liability for a relevant action taken in accordance with this direction unless the action is taken in bad faith.
Manager NEM Real Time Operations
Direction - in SA region to Origin Energy Electricity Limited - QUARANTINE PS UNIT 5
Refer to Market Notice 144079
In accordance with section 116 of the National Electricity Law, AEMO is issuing a direction to Origin Energy Electricity Limited. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
Direction issued to: Origin Energy Electricity Limited - QUARANTINE PS UNIT 5 at 1255 hrs 14/05/2026
Type of resource: generating unit
Required actions: Synchronise and follow dispatch targets at 1320 hrs 14/05/2026
Services provided: Voltage Control
Circumstances necessitating the Direction: Voltage
Circumstances necessitating the Direction additional detail: The synchronous generating units currently expected to be synchronised in SA will be inadequate to maintain sufficient Voltage Control in SA. Intervention is required to maintain the power system in a secure operating state
Expected duration: 1420 hrs 14/05/2026.
Origin Energy Electricity Limited does not incur any civil monetary liability for a relevant action taken in accordance with this direction unless the action is taken in bad faith.
Manager NEM Real Time Operations
144077MARKET INTERVENTION14/05/2026 12:06:57 PM
Foreseeable AEMO intervention in SA region
AEMO ELECTRICITY MARKET NOTICE
Foreseeable AEMO intervention in SA region
AEMO has identified a foreseeable circumstance that may require an AEMO intervention event in the SA region from 1230 hrs 14/05/2026.
The foreseeable circumstance requiring the need for intervention is Voltage.
AEMO estimates that, in the absence of sufficient market response by 1210 hrs 14/05/2026, AEMO may need to intervene by issuing a direction.
Manager NEM Real Time Operations
Foreseeable AEMO intervention in SA region
AEMO has identified a foreseeable circumstance that may require an AEMO intervention event in the SA region from 1230 hrs 14/05/2026.
The foreseeable circumstance requiring the need for intervention is Voltage.
AEMO estimates that, in the absence of sufficient market response by 1210 hrs 14/05/2026, AEMO may need to intervene by issuing a direction.
Manager NEM Real Time Operations
144076NON-CONFORMANCE14/05/2026 08:30:16 AM
NON-CONFORMANCE Region SA1 Thursday, 14 May 2026
AEMO ELECTRICITY MARKET NOTICE
NON-CONFORMANCE SA1 Region Thursday, 14 May 2026
AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:
Unit: HPR1
Duration: 14/05/2026 08:25 to 14/05/2026 08:30
Amount: 79 MW
Constraint: NC-S_HPR1
Auto-generated on behalf of Manager NEM Real Time Operations
NON-CONFORMANCE SA1 Region Thursday, 14 May 2026
AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:
Unit: HPR1
Duration: 14/05/2026 08:25 to 14/05/2026 08:30
Amount: 79 MW
Constraint: NC-S_HPR1
Auto-generated on behalf of Manager NEM Real Time Operations
144075INTER-REGIONAL TRANSFER13/05/2026 03:27:42 PM
Inter-regional transfer limit variation - Tailem Bend - South East No.1 275 kV Line - SA region - 13/05/2026
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Tailem Bend - South East No.1 275 kV Line - SA region - 13/05/2026
A planned outage of Tailem Bend - South East No.1 275 kV Line in the SA region was scheduled from 0800 hrs 13/05/2026 to 1830 hrs 13/05/2026.
The outage has been completed and Tailem Bend - South East No.1 275 kV Line returned to service at 1520 hrs 13/05/2026
Constraint set(s) revoked: S-X_TBSE+BDBU; S-BC_CP
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Tailem Bend - South East No.1 275 kV Line - SA region - 13/05/2026
A planned outage of Tailem Bend - South East No.1 275 kV Line in the SA region was scheduled from 0800 hrs 13/05/2026 to 1830 hrs 13/05/2026.
The outage has been completed and Tailem Bend - South East No.1 275 kV Line returned to service at 1520 hrs 13/05/2026
Constraint set(s) revoked: S-X_TBSE+BDBU; S-BC_CP
Manager NEM Real Time Operations