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144166POWER SYSTEM EVENTS29/05/2026 09:41:16 PM
Update - Non-credible contingency event - QLD region - 29/05/2026
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - QLD region - 29/05/2026
Refer AEMO Electricity Market Notice 144162
At 2135 hrs the Woolooga to Teebar Creek 8850 275kV Line and the Teebar Ck No2 275kV Bus 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 - 29/05/2026
Refer AEMO Electricity Market Notice 144162
At 2135 hrs the Woolooga to Teebar Creek 8850 275kV Line and the Teebar Ck No2 275kV Bus 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
144162POWER SYSTEM EVENTS29/05/2026 10:50:40 AM
Non-credible contingency event - QLD region - 29/05/2026
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - QLD region - 29/05/2026
At 1013 hrs the Woolooga to Teebar Creek 8850 275kV Line and the Teebar Ck No2 275kV Bus 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 - QLD region - 29/05/2026
At 1013 hrs the Woolooga to Teebar Creek 8850 275kV Line and the Teebar Ck No2 275kV Bus 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
144117POWER SYSTEM EVENTS18/05/2026 01:54:51 PM
Update - Non-credible contingency event -NSW region - 17 May 2026
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - NSW region - 17/05/2026
Refer AEMO Electricity Market Notice 144112
At 1327 hrs the Upper Tumut Units 1, 2, 3 and 4 were made available to return 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 - 17/05/2026
Refer AEMO Electricity Market Notice 144112
At 1327 hrs the Upper Tumut Units 1, 2, 3 and 4 were made available to return 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
144112POWER SYSTEM EVENTS18/05/2026 12:00:40 AM
Non-credible contingency event - NSW region - 17/05/2026
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - NSW region - 17/05/2026
At 2317 hrs the Upper Tumut Units 1, 2, 3 and 4 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 - 17/05/2026
At 2317 hrs the Upper Tumut Units 1, 2, 3 and 4 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
144074POWER SYSTEM EVENTS13/05/2026 01:49:17 PM
Update - Non-credible contingency event - QLD region - 13/05/2026
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - QLD region - 13/05/2026
Refer AEMO Electricity Market Notice 144073
At 1341 hrs the T157 Ingham South No.1 and No.2 132/66kV Transformers were 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 - 13/05/2026
Refer AEMO Electricity Market Notice 144073
At 1341 hrs the T157 Ingham South No.1 and No.2 132/66kV Transformers were 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
144073POWER SYSTEM EVENTS13/05/2026 01:23:44 PM
Non-credible contingency event - QLD region - 13/05/2026
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - QLD region - 13/05/2026
At 1255 hrs the T157 Ingham South No.1 and No.2 132/66kV Transformers tripped.
AEMO did not instruct load shedding.
AEMO estimates approximately 6MW of electrical load has been disconnected.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
Non-credible contingency event - QLD region - 13/05/2026
At 1255 hrs the T157 Ingham South No.1 and No.2 132/66kV Transformers tripped.
AEMO did not instruct load shedding.
AEMO estimates approximately 6MW of electrical load has been disconnected.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
144053POWER SYSTEM EVENTS06/05/2026 01:21:48 PM
Non-credible contingency event - QLD region - 6/05/2026
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - QLD region - 6/05/2026
At 1239 hrs the Townsville South No. 2 132 kV Bus 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 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
Non-credible contingency event - QLD region - 6/05/2026
At 1239 hrs the Townsville South No. 2 132 kV Bus 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 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
141087POWER SYSTEM EVENTS15/04/2026 03:45:55 PM
Non-credible contingency event - VIC region - 15/04/2026
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - VIC region - 15/04/2026
At 1506 hrs the JLysaght - Tyabb 1 220kV Line and the JLysaght - Tyabb 2 220kV Line tripped.
AEMO did not instruct load shedding.
AEMO has been advised of disconnection of 16 MWs of bulk electrical load.
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
Non-credible contingency event - VIC region - 15/04/2026
At 1506 hrs the JLysaght - Tyabb 1 220kV Line and the JLysaght - Tyabb 2 220kV Line tripped.
AEMO did not instruct load shedding.
AEMO has been advised of disconnection of 16 MWs of bulk electrical load.
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
141069POWER SYSTEM EVENTS13/04/2026 08:39:49 PM
Update - Non-credible contingency event - TAS region - 11/04/2026
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - TAS region - 11/04/2026
Refer AEMO Electricity Market Notice 141053
At 1357 hrs 11/04/2026 the Farrell -Tribute 220 kV line, Farrell - John Butters 220kV Line and the Farrell - Mackintosh 110kV Line tripped. These lines have been returned to service.
The cause of the trip was identified as due to lightning
There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible.
Region: TAS1
Lines: Farrell -Tribute 220 kV line, Farrell - John Butters 220kV Line and the Farrell - Mackintosh 110kV lines
Cancellation time: 13/04/2026 20:25
Constraint set(s) revoked: T-JB_MC_TI_250, F-T-JB_MC_TI_N-2
The following interconnector(s) are on the left hand side: T-V-MNSP1
Manager NEM Real Time Operations
Update - Non-credible contingency event - TAS region - 11/04/2026
Refer AEMO Electricity Market Notice 141053
At 1357 hrs 11/04/2026 the Farrell -Tribute 220 kV line, Farrell - John Butters 220kV Line and the Farrell - Mackintosh 110kV Line tripped. These lines have been returned to service.
The cause of the trip was identified as due to lightning
There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible.
Region: TAS1
Lines: Farrell -Tribute 220 kV line, Farrell - John Butters 220kV Line and the Farrell - Mackintosh 110kV lines
Cancellation time: 13/04/2026 20:25
Constraint set(s) revoked: T-JB_MC_TI_250, F-T-JB_MC_TI_N-2
The following interconnector(s) are on the left hand side: T-V-MNSP1
Manager NEM Real Time Operations