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107527POWER SYSTEM EVENTS18/04/2023 05:51:48 PM
Update - Non-credible contingency event - NSW region - 07/04/2023
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - NSW region - 07/04/2023
Refer AEMO MN 107349
At 1648 hrs 18/04/2023, the Tamworth SVC 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 - 07/04/2023
Refer AEMO MN 107349
At 1648 hrs 18/04/2023, the Tamworth SVC 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
107349POWER SYSTEM EVENTS07/04/2023 11:10:58 PM
Non-credible contingency event - NSW region - 07/04/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - NSW region - 07/04/2023
At 2257 hrs the Liddell - Tomago 82 330 kV line and the Tamworth SVC 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 - 07/04/2023
At 2257 hrs the Liddell - Tomago 82 330 kV line and the Tamworth SVC 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
107335POWER SYSTEM EVENTS07/04/2023 06:56:49 PM
Non-credible contingency event - NSW region - 07/04/2023
AEMO ELECTRICITY MARKET NOTICE.
Refer MN 107334 - Non-credible contingency event more likely to occur due to existence of abnormal condition/s - NSW region.
Non-credible contingency event - NSW region - 07/04/2023
At 1828 hrs the Mt Piper - Bannaby 5A6 500 kV line and Mt Piper - Bannaby 5A7 500 kV line tripped and auto reclosed.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
Manager NEM Real Time Operations
Refer MN 107334 - Non-credible contingency event more likely to occur due to existence of abnormal condition/s - NSW region.
Non-credible contingency event - NSW region - 07/04/2023
At 1828 hrs the Mt Piper - Bannaby 5A6 500 kV line and Mt Piper - Bannaby 5A7 500 kV line tripped and auto reclosed.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
Manager NEM Real Time Operations
107305POWER SYSTEM EVENTS06/04/2023 07:11:14 PM
Non-credible contingency event - SA region - 06/04/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - SA region - 06/04/2023
At 1814 hrs the Robertstown - North West Bend No 1 Line and the North West Bend - Monash - Berri No 1 Line tripped and auto reclosed.
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 - SA region - 06/04/2023
At 1814 hrs the Robertstown - North West Bend No 1 Line and the North West Bend - Monash - Berri No 1 Line tripped and auto reclosed.
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
107160POWER SYSTEM EVENTS02/04/2023 09:46:00 AM
Non-credible contingency event - Qld region - 01/04/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Qld region - 01/04/2023
At 1950 hrs 01/04/2023 there was an unplanned outage of Unit 5 and Unit 7 at H48 Braemar 2 Power Station.
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 - 01/04/2023
At 1950 hrs 01/04/2023 there was an unplanned outage of Unit 5 and Unit 7 at H48 Braemar 2 Power Station.
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
107152POWER SYSTEM EVENTS01/04/2023 09:52:09 PM
Non-credible contingency event - Qld region - 01/04/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Qld region - 01/04/2023
At 2109 hrs ,
- Feeder 877 Woree -Tumoulin 275 kV - tripped and auto reclosed
- Feeder 7166 Chalumbin - Turkinje 132 kV - Tripped and auto reclosed
- Feeder 7143 Kamerunga - Barron Gorge - Tripped
AEMO did not instruct load shedding.
AEMO was advised of disconnection of bulk electrical load of 30 MW.
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 - 01/04/2023
At 2109 hrs ,
- Feeder 877 Woree -Tumoulin 275 kV - tripped and auto reclosed
- Feeder 7166 Chalumbin - Turkinje 132 kV - Tripped and auto reclosed
- Feeder 7143 Kamerunga - Barron Gorge - Tripped
AEMO did not instruct load shedding.
AEMO was advised of disconnection of bulk electrical load of 30 MW.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
107032POWER SYSTEM EVENTS27/03/2023 04:23:28 PM
Update - Non-credible contingency event - TAS region - 27/03/2023
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - TAS region - 27/03/2023
Refer AEMO Electricity market notice 106999
At 1040 hrs the Sheffield - Palmerston 220kV line tripped at the Palmerston end only.
The cause of this non credible contingency event is not known at this stage.
AEMO is not satisfied that this non credible event is unlikely to re-occur.
AEMO has therefore reclassified this event as a credible contingency event until further notice.
Region: Tas
Duration: 1227/03/2023 16:20 until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations
Update - Non-credible contingency event - TAS region - 27/03/2023
Refer AEMO Electricity market notice 106999
At 1040 hrs the Sheffield - Palmerston 220kV line tripped at the Palmerston end only.
The cause of this non credible contingency event is not known at this stage.
AEMO is not satisfied that this non credible event is unlikely to re-occur.
AEMO has therefore reclassified this event as a credible contingency event until further notice.
Region: Tas
Duration: 1227/03/2023 16:20 until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations
106999POWER SYSTEM EVENTS27/03/2023 12:27:13 PM
Non-credible contingency event - TAS region - 27/03/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - TAS region - 27/03/2023
At 1040 hrs the Sheffield - Palmerston 220kV line tripped at the Palmerston 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
Non-credible contingency event - TAS region - 27/03/2023
At 1040 hrs the Sheffield - Palmerston 220kV line tripped at the Palmerston 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
106896POWER SYSTEM EVENTS23/03/2023 11:32:12 AM
Non-credible contingency event - SA region - 23/03/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - SA region - 23/03/2023
At 1113 hrs the South East SVC 1 and SVC 2 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 - SA region - 23/03/2023
At 1113 hrs the South East SVC 1 and SVC 2 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