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125561POWER SYSTEM EVENTS12/03/2025 02:12:35 PM
Update - Non-credible contingency event - TAS region - 12/03/2025
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - TAS region - 12/03/2025
Refer AEMO Electricity Market Notice 125555
Updated elements: Sheffield George Town No. 1 220kV Line, Sheffield George Town No. 2 220kV Line plus 40 MW load loss at Nystar and 56 MW load loss at Temco.
Manager NEM Real Time Operations
Update - Non-credible contingency event - TAS region - 12/03/2025
Refer AEMO Electricity Market Notice 125555
Updated elements: Sheffield George Town No. 1 220kV Line, Sheffield George Town No. 2 220kV Line plus 40 MW load loss at Nystar and 56 MW load loss at Temco.
Manager NEM Real Time Operations
125556POWER SYSTEM EVENTS12/03/2025 01:24:46 PM
Non-credible contingency event - TAS region - 12/03/2025
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - TAS region - 12/03/2025
At 1200 hrs the Sheffield - Burnie No. 1 220kV Line, Sheffield - Burnie 2 110kV Line and the Ulverstone - Emu Bay 110kV Line tripped.
AEMO did not instruct load shedding.
AEMO has been advised that 43MW of bulk 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 - TAS region - 12/03/2025
At 1200 hrs the Sheffield - Burnie No. 1 220kV Line, Sheffield - Burnie 2 110kV Line and the Ulverstone - Emu Bay 110kV Line tripped.
AEMO did not instruct load shedding.
AEMO has been advised that 43MW of bulk electrical load has been disconnected.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
125555POWER SYSTEM EVENTS12/03/2025 12:58:00 PM
Update - Non-credible contingency event - TAS region - 12/03/2025
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - TAS region - 12/03/2025
Refer AEMO Electricity Market Notice 125554
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
Elements: Sheffield George Town No. 1 220kV Line and Sheffield George Town No. 2 220kV Line
Duration: 1300 hrs 12/03/2025 until further notice
Constraint set(s) invoked: T-GTSH_N-2
Manager NEM Real Time Operations
Update - Non-credible contingency event - TAS region - 12/03/2025
Refer AEMO Electricity Market Notice 125554
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
Elements: Sheffield George Town No. 1 220kV Line and Sheffield George Town No. 2 220kV Line
Duration: 1300 hrs 12/03/2025 until further notice
Constraint set(s) invoked: T-GTSH_N-2
Manager NEM Real Time Operations
125554POWER SYSTEM EVENTS12/03/2025 12:24:04 PM
Non-credible contingency event - TAS region - 12/03/2025
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - TAS region - 12/03/2025
At 1158 hrs the Sheffield George Town No. 1 220kV Line and the Sheffield George Town No. 2 220kV Line 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 - TAS region - 12/03/2025
At 1158 hrs the Sheffield George Town No. 1 220kV Line and the Sheffield George Town No. 2 220kV Line 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
125550POWER SYSTEM EVENTS12/03/2025 09:47:07 AM
Update - Non-credible contingency event - TAS region - 12/03/2025
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - TAS region - 12/03/2025
Refer AEMO Electricity Market Notice 125548
At 09:29 hrs the Burnie - Smithton Tee Port Latta No. 1 110kV Line and the Burnie - Smithton Tee Port Latta No. 2 110kV Line tripped and auto-reclosed (2nd event).
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
Elements: Burnie - Smithton Tee Port Latta No. 1 110kV Line and Burnie - Smithton Tee Port Latta No. 2 110kV Line
Duration: 0940 hrs 12/03/2025 until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations
Update - Non-credible contingency event - TAS region - 12/03/2025
Refer AEMO Electricity Market Notice 125548
At 09:29 hrs the Burnie - Smithton Tee Port Latta No. 1 110kV Line and the Burnie - Smithton Tee Port Latta No. 2 110kV Line tripped and auto-reclosed (2nd event).
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
Elements: Burnie - Smithton Tee Port Latta No. 1 110kV Line and Burnie - Smithton Tee Port Latta No. 2 110kV Line
Duration: 0940 hrs 12/03/2025 until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations
125548POWER SYSTEM EVENTS12/03/2025 09:46:32 AM
Non-credible contingency event - TAS region - 12/03/2025
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - TAS region - 12/03/2025
At 0909 hrs the Burnie -Smithton Tee Port Latta No. 1 110kV Line and the Burnie -Smithton Tee Port Latta No. 2 110kV 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 - TAS region - 12/03/2025
At 0909 hrs the Burnie -Smithton Tee Port Latta No. 1 110kV Line and the Burnie -Smithton Tee Port Latta No. 2 110kV 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
125521NON-CONFORMANCE11/03/2025 11:55:21 AM
NON-CONFORMANCE Region NSW1 Tuesday, 11 March 2025
AEMO ELECTRICITY MARKET NOTICE
NON-CONFORMANCE NSW1 Region Tuesday, 11 March 2025
AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:
Unit: WTAHB1
Duration: 11/03/2025 11:25 to 11/03/2025 11:55
Amount: -9 MW
Constraint: NC-N_WTAHB1
Auto-generated on behalf of Manager NEM Real Time Operations
NON-CONFORMANCE NSW1 Region Tuesday, 11 March 2025
AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:
Unit: WTAHB1
Duration: 11/03/2025 11:25 to 11/03/2025 11:55
Amount: -9 MW
Constraint: NC-N_WTAHB1
Auto-generated on behalf of Manager NEM Real Time Operations
125517POWER SYSTEM EVENTS11/03/2025 10:05:23 AM
Non-credible contingency event - SA region - 11/03/2025
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - SA region - 11/03/2025
At 0917 hrs the Penola West - South East 132 kV line and the Kincraig - Penola West 132 kV line tripped.
AEMO did not instruct load shedding.
Approximately 3 MW 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 - SA region - 11/03/2025
At 0917 hrs the Penola West - South East 132 kV line and the Kincraig - Penola West 132 kV line tripped.
AEMO did not instruct load shedding.
Approximately 3 MW 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
125474NON-CONFORMANCE10/03/2025 01:05:17 PM
NON-CONFORMANCE Region QLD1 Monday, 10 March 2025
AEMO ELECTRICITY MARKET NOTICE
NON-CONFORMANCE QLD1 Region Monday, 10 March 2025
AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:
Unit: MPP_1
Duration: 10/03/2025 13:00 to 10/03/2025 13:05
Amount: -11 MW
Constraint: NC-Q_MPP_1
Auto-generated on behalf of Manager NEM Real Time Operations
NON-CONFORMANCE QLD1 Region Monday, 10 March 2025
AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:
Unit: MPP_1
Duration: 10/03/2025 13:00 to 10/03/2025 13:05
Amount: -11 MW
Constraint: NC-Q_MPP_1
Auto-generated on behalf of Manager NEM Real Time Operations