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109563POWER SYSTEM EVENTS04/09/2023 01:53:34 PM
Update - Non-credible contingency event - SA region - 04/09/2023
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - SA region - 04/09/2023
Refer AEMO ELECTRICITY MARKET NOTICE MN 109561
At 1341 hrs the Tungkillo East 275 KV 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 - SA region - 04/09/2023
Refer AEMO ELECTRICITY MARKET NOTICE MN 109561
At 1341 hrs the Tungkillo East 275 KV 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
109561POWER SYSTEM EVENTS04/09/2023 01:15:55 PM
Non-credible contingency event - SA region - 04/09/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - SA region - 04/09/2023
At 1252 hrs the Tungkillo East 275 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 is not known at this stage.
Manager NEM Real Time Operations
Non-credible contingency event - SA region - 04/09/2023
At 1252 hrs the Tungkillo East 275 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 is not known at this stage.
Manager NEM Real Time Operations
109443POWER SYSTEM EVENTS25/08/2023 02:16:55 PM
Non-credible contingency event - TAS region - 25/08/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - TAS region - 25/08/2023
At 1331 hrs the Gordon C 220kV 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 - TAS region - 25/08/2023
At 1331 hrs the Gordon C 220kV 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
109321POWER SYSTEM EVENTS15/08/2023 12:50:46 PM
Non-credible contingency event - SA region - 15/08/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - SA Region region - 15/08/2023
At 1147 hrs the Blyth West - Munno Para 275kV Line tripped at Blyth West 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 - SA Region region - 15/08/2023
At 1147 hrs the Blyth West - Munno Para 275kV Line tripped at Blyth West 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
109283POWER SYSTEM EVENTS11/08/2023 08:57:28 PM
Non-credible contingency event - SA region - 11/08/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - SA region - 11/08/2023
At 2035 hrs the Snapper Point power station generators GT1, GT2, GT3, GT4, GT5 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 - 11/08/2023
At 2035 hrs the Snapper Point power station generators GT1, GT2, GT3, GT4, GT5 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
109048POWER SYSTEM EVENTS26/07/2023 02:25:01 PM
Non-credible contingency event - Vic region - 26/07/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Vic region - 26/07/2023
At 1345 hrs the Hazelwood A4 500/220 kV Transformer tripped on the 220 kV CBs at Hazelwood power station end only
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
At 1348 hrs the Hazelwood A4 500/220 kV Transformer 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
Non-credible contingency event - Vic region - 26/07/2023
At 1345 hrs the Hazelwood A4 500/220 kV Transformer tripped on the 220 kV CBs at Hazelwood power station end only
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
At 1348 hrs the Hazelwood A4 500/220 kV Transformer 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
108934POWER SYSTEM EVENTS16/07/2023 06:56:31 PM
Update - Non-credible contingency event - QLD region - 16/07/2023
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - QLD region - 16/07/2023
Refer AEMO ELECTRICITY MARKET NOTICE MN 108929
At 1821 hrs the H021 Murarrie substation No. 1 110 kV 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 - 16/07/2023
Refer AEMO ELECTRICITY MARKET NOTICE MN 108929
At 1821 hrs the H021 Murarrie substation No. 1 110 kV 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
108929POWER SYSTEM EVENTS16/07/2023 04:24:11 PM
Non-credible contingency event - QLD region - 16/07/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - QLD region - 16/07/2023
At 1557 hrs the H021 Murarrie substation No 1 110 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 is not known at this stage.
Manager NEM Real Time Operations
Non-credible contingency event - QLD region - 16/07/2023
At 1557 hrs the H021 Murarrie substation No 1 110 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 is not known at this stage.
Manager NEM Real Time Operations
108892POWER SYSTEM EVENTS13/07/2023 04:07:21 AM
Update - Non-credible contingency event - Tenterfield 132 kV line CB 96R2 at Glen Innes - NSW region - 13/07/2023
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - Tenterfield 132 kV line CB 96R2 at Glen Innes - NSW region - 13/07/2023
Refer AEMO ELECTRICITY MARKET NOTICE 108891
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: NSW
Element: Tenterfield 132 kV line CB 96R2 at Glen Innes
Duration: 0258 hrs 13/07/2023 until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations
Update - Non-credible contingency event - Tenterfield 132 kV line CB 96R2 at Glen Innes - NSW region - 13/07/2023
Refer AEMO ELECTRICITY MARKET NOTICE 108891
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: NSW
Element: Tenterfield 132 kV line CB 96R2 at Glen Innes
Duration: 0258 hrs 13/07/2023 until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations