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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
105822POWER SYSTEM EVENTS13/02/2023 02:34:40 PM
Non-credible contingency event - Qld Region - 13/02/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Qld Region - 13/02/2023
At 1402 hrs 13/02/2023 the H77 Columboola - H76 Wandoan South No. 8891 and No. 8892 275 kV Lines tripped, also affecting supply west of H79 Yuleba North and H80 Eurombah.
AEMO did not instruct load shedding.
Approximately 390 MW of Load interrupted and 114 MW of Generation interrupted.
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 - 13/02/2023
At 1402 hrs 13/02/2023 the H77 Columboola - H76 Wandoan South No. 8891 and No. 8892 275 kV Lines tripped, also affecting supply west of H79 Yuleba North and H80 Eurombah.
AEMO did not instruct load shedding.
Approximately 390 MW of Load interrupted and 114 MW of Generation interrupted.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
105653POWER SYSTEM EVENTS06/02/2023 09:39:29 AM
Non-credible contingency event - Qld Region - 03/02/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Qld Region - 03/02/2023
At 1722 hrs 03/02/2023 the Kareeya Power Station Unit 1, Unit 2 and Unit 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 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 - 03/02/2023
At 1722 hrs 03/02/2023 the Kareeya Power Station Unit 1, Unit 2 and Unit 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 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
104357POWER SYSTEM EVENTS11/12/2022 01:34:36 PM
Update - Non-credible contingency event - Vic region - 11/12/2022
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - Vic region - 11/12/2022
Refer AEMO ELECTRICITY MARKET NOTICE 104353
At 1157 hrs the Kerang - Wemen - Red Cliffs 220 kV Line and the Kiamal Solar Farm STX transformer (Kiamal synchronous condenser) tripped.
AEMO did not instruct load shedding.
AEMO has been advised of disconnection of bulk electrical load (27 MW)
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
Update - Non-credible contingency event - Vic region - 11/12/2022
Refer AEMO ELECTRICITY MARKET NOTICE 104353
At 1157 hrs the Kerang - Wemen - Red Cliffs 220 kV Line and the Kiamal Solar Farm STX transformer (Kiamal synchronous condenser) tripped.
AEMO did not instruct load shedding.
AEMO has been advised of disconnection of bulk electrical load (27 MW)
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
104353POWER SYSTEM EVENTS11/12/2022 01:11:07 PM
Non-credible contingency event - Vic region - 11/12/2022
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Vic region - 11/12/2022
At 1157 hrs the Kerang - Wemen - Red Cliffs 220 kV Line and the Kiamal Solar Farm STX transformer (Kiamal synchronous condenser) tripped.
AEMO did not instruct load shedding.
AEMO is still waiting to be 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 - Vic region - 11/12/2022
At 1157 hrs the Kerang - Wemen - Red Cliffs 220 kV Line and the Kiamal Solar Farm STX transformer (Kiamal synchronous condenser) tripped.
AEMO did not instruct load shedding.
AEMO is still waiting to be 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
103961POWER SYSTEM EVENTS25/11/2022 08:32:50 PM
Update - Vulnerable lines in Qld region
AEMO ELECTRICITY MARKET NOTICE.
Update - Lightning vulnerable lines in Qld region
Refer to AEMO Electricity Market Notice 103958 and 103959
At 1913 hrs Chalumbin - Turkinje No.7165 132 kV and Chalumbin - Turkinje No.7166 132 kV Lines tripped and auto-reclosed.
The cause of the trip was identified as due to lightning.
In accordance with SO_OP_3715, AEMO now considers the Chalumbin - Turkinje No.7165 132 kV and Chalumbin - Turkinje No.7166 132 kV lines to be vulnerable with a category of probable due to lightning.
Manager NEM Real Time Operations
Update - Lightning vulnerable lines in Qld region
Refer to AEMO Electricity Market Notice 103958 and 103959
At 1913 hrs Chalumbin - Turkinje No.7165 132 kV and Chalumbin - Turkinje No.7166 132 kV Lines tripped and auto-reclosed.
The cause of the trip was identified as due to lightning.
In accordance with SO_OP_3715, AEMO now considers the Chalumbin - Turkinje No.7165 132 kV and Chalumbin - Turkinje No.7166 132 kV lines to be vulnerable with a category of probable due to lightning.
Manager NEM Real Time Operations
103958POWER SYSTEM EVENTS25/11/2022 07:40:37 PM
Non-credible contingency event - Qld region - 25/11/2022
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Qld region - 25/11/2022
At 1913 hrs the Chalumbin - Turkinje 7165 and 7166 132 kV Lines tripped and auto-reclosed.
AEMO did not instruct load shedding.
Approximately 75 MW of load was interrupted during the auto-reclose time.
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 - 25/11/2022
At 1913 hrs the Chalumbin - Turkinje 7165 and 7166 132 kV Lines tripped and auto-reclosed.
AEMO did not instruct load shedding.
Approximately 75 MW of load was interrupted during the auto-reclose time.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations