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126786CONSTRAINTS29/04/2025 05:43:58 PM
Updated Victorian system normal voltage stability limit for the south-west Victoria
AEMO ELECTRICITY MARKET NOTICE
Refer to Market Notice 101368
AEMO has completed a review of the system normal voltage stability limit in the south-west Victoria as a result of Mortlake terminal station cut-in on the Haunted Gully to Tarrone 500 kV line.
The revised limit is increased by 100 MW on the cut-set from Haunted Gully to Moorabool and Mortlake to Moorabool 500 kV lines for flow towards Moorabool.
Full details on the limits advice are to be published shortly on the AEMO website: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
The revised limit has been implemented at 1201 hrs on Tuesday 29th April 2025, by updating V^^V_NIL_SWVIC.
For further details on this constraint equation please contact terry.liu@aemo.com.au
Terry Liu
AEMO Operations
Refer to Market Notice 101368
AEMO has completed a review of the system normal voltage stability limit in the south-west Victoria as a result of Mortlake terminal station cut-in on the Haunted Gully to Tarrone 500 kV line.
The revised limit is increased by 100 MW on the cut-set from Haunted Gully to Moorabool and Mortlake to Moorabool 500 kV lines for flow towards Moorabool.
Full details on the limits advice are to be published shortly on the AEMO website: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
The revised limit has been implemented at 1201 hrs on Tuesday 29th April 2025, by updating V^^V_NIL_SWVIC.
For further details on this constraint equation please contact terry.liu@aemo.com.au
Terry Liu
AEMO Operations
126783INTER-REGIONAL TRANSFER29/04/2025 04:51:17 PM
Inter-regional transfer limit variation - Eraring - Kemps Creek 5A1 500 kV line- NSW region - 29/04/2025
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Eraring - Kemps Creek 5A1 500 kV line - NSW region - 29/04/2025
A planned outage of Eraring - Kemps Creek 5A1 500 kV line in the NSW region was scheduled from 0730 hrs 28/04/2025 to 1600 hrs 02/05/2025.
The outage has been completed and Eraring - Kemps Creek 5A1 500 kV line returned to service at 1650 hrs 29/04/2025
Constraint set revoked: N-ERKC_ONE
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Eraring - Kemps Creek 5A1 500 kV line - NSW region - 29/04/2025
A planned outage of Eraring - Kemps Creek 5A1 500 kV line in the NSW region was scheduled from 0730 hrs 28/04/2025 to 1600 hrs 02/05/2025.
The outage has been completed and Eraring - Kemps Creek 5A1 500 kV line returned to service at 1650 hrs 29/04/2025
Constraint set revoked: N-ERKC_ONE
Manager NEM Real Time Operations
126740INTER-REGIONAL TRANSFER26/04/2025 11:57:04 AM
Inter-regional transfer limit variation - [outage element] - NSW region - 26/04/2025
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - [outage element] - NSW region - 26/04/2025
At 1140 hrs 26/04/2025 there was a short notice outage of Griffith - Yanco 99J 132 kV Line.
The following constraint set(s) invoked at 1140 hrs 26/04/2025
N-GFYC-99J-C
This constraint set(s) contains equations with the following interconnectors on the LHS.
V-S-MNSP1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - [outage element] - NSW region - 26/04/2025
At 1140 hrs 26/04/2025 there was a short notice outage of Griffith - Yanco 99J 132 kV Line.
The following constraint set(s) invoked at 1140 hrs 26/04/2025
N-GFYC-99J-C
This constraint set(s) contains equations with the following interconnectors on the LHS.
V-S-MNSP1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
126600POWER SYSTEM EVENTS20/04/2025 06:23:59 AM
Update - Non-credible contingency event - NSW region - 19/04/2025
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - NSW region - 19/04/2025
Refer AEMO Electricity Market Notice 126598
At 0617 hrs the Uralla - New England Solar Farm No.1 330/33 kV Transformer and New England No.2 Solar Farm was returned to service.
The cause of this non-credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.
AEMO will not reclassify this event as a credible contingency event.
Manager NEM Real Time Operations
Update - Non-credible contingency event - NSW region - 19/04/2025
Refer AEMO Electricity Market Notice 126598
At 0617 hrs the Uralla - New England Solar Farm No.1 330/33 kV Transformer and New England No.2 Solar Farm was returned to service.
The cause of this non-credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.
AEMO will not reclassify this event as a credible contingency event.
Manager NEM Real Time Operations
126598POWER SYSTEM EVENTS19/04/2025 02:39:05 PM
Non-credible contingency event - NSW region - 19/04/2025
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - NSW region - 19/04/2025
At 1351 hrs the Uralla - New England Solar Farm No.1 330/33 kV Transformer and New England No.2 Solar Farm tripped.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
Non-credible contingency event - NSW region - 19/04/2025
At 1351 hrs the Uralla - New England Solar Farm No.1 330/33 kV Transformer and New England No.2 Solar Farm tripped.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
126580POWER SYSTEM EVENTS17/04/2025 12:38:34 PM
Update - Non-credible contingency event - QLD region - 16/04/2025
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - QLD region - 16/04/2025
Refer AEMO Electricity Market Notice 126579
At 1231 hrs the Greenbank - Molendinar 8825 275kV line was returned to service.
The cause of this non-credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.
AEMO will not reclassify this event as a credible contingency event.
Manager NEM Real Time Operations
Update - Non-credible contingency event - QLD region - 16/04/2025
Refer AEMO Electricity Market Notice 126579
At 1231 hrs the Greenbank - Molendinar 8825 275kV line was returned to service.
The cause of this non-credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.
AEMO will not reclassify this event as a credible contingency event.
Manager NEM Real Time Operations
126579POWER SYSTEM EVENTS16/04/2025 11:10:49 PM
Non-credible contingency event - QLD region - 16/04/2025
AEMO ELECTRICITY MARKET NOTICE.
Refer market notice: 126577
Non-credible contingency event - QLD region - 16/04/2025
At 2110 hrs the Greenbank - Molendinar 8825 275kV line tripped at the Molendinar end only.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
Refer market notice: 126577
Non-credible contingency event - QLD region - 16/04/2025
At 2110 hrs the Greenbank - Molendinar 8825 275kV line tripped at the Molendinar end only.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
126577INTER-REGIONAL TRANSFER16/04/2025 09:33:38 PM
Inter-regional transfer limit variation - Greenbank - Molendinar 8825 275kV line - QLD region - 16/04/2025
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Greenbank - Molendinar 8825 275kV line - QLD region - 16/04/2025
At 2110 hrs 16/04/2025 there was an unplanned outage of Greenbank - Molendinar 8825 275kV line.
The following constraint set(s) invoked at 2120 hrs 16/04/2025
Q-GBMO_8824_8825
This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q-MNSP1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Greenbank - Molendinar 8825 275kV line - QLD region - 16/04/2025
At 2110 hrs 16/04/2025 there was an unplanned outage of Greenbank - Molendinar 8825 275kV line.
The following constraint set(s) invoked at 2120 hrs 16/04/2025
Q-GBMO_8824_8825
This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q-MNSP1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
126558INTER-REGIONAL TRANSFER14/04/2025 05:49:12 PM
Inter-regional transfer limit variation - Collector -Yass 3L 330kV Line - NSW region - 14/04/2025
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Collector -Yass 3L 330kV Line - NSW region - 14/04/2025
A planned outage of the Collector -Yass 3L 330kV Line in the NSW region was scheduled from 0700 hrs 12/04/2025 to 1700 hrs 16/04/2025.
The outage has been completed and the Collector -Yass 3L 330kV Line returned to service at 1735 hrs 14/04/2025
Constraint set(s) revoked: N-CTYS_3L_WG_CLOSE
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Collector -Yass 3L 330kV Line - NSW region - 14/04/2025
A planned outage of the Collector -Yass 3L 330kV Line in the NSW region was scheduled from 0700 hrs 12/04/2025 to 1700 hrs 16/04/2025.
The outage has been completed and the Collector -Yass 3L 330kV Line returned to service at 1735 hrs 14/04/2025
Constraint set(s) revoked: N-CTYS_3L_WG_CLOSE
Manager NEM Real Time Operations