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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
106785MARKET SUSPENSION17/03/2023 08:42:02 PM
Declaration of electricity market resumption
AEMO ELECTRICITY MARKET NOTICE
Declaration of electricity market resumption
Refer initial AEMO Electricity Market Notice 106784
AEMO declares that the suspension of the spot market in New South Wales will end at 2110 hrs on 17 March 2023.
Failure of SCADA systems in NSW have been resolved.
Relevant Market Notices issued under this suspension:
106784
Manager NEM Real Time Operations
Declaration of electricity market resumption
Refer initial AEMO Electricity Market Notice 106784
AEMO declares that the suspension of the spot market in New South Wales will end at 2110 hrs on 17 March 2023.
Failure of SCADA systems in NSW have been resolved.
Relevant Market Notices issued under this suspension:
106784
Manager NEM Real Time Operations
106784MARKET SUSPENSION17/03/2023 08:10:40 PM
Declaration of electricity market suspension
AEMO ELECTRICITY MARKET NOTICE
Declaration of electricity market suspension
AEMO declares the spot market suspended in New South Wales with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 2015 hrs on 17 March 2023 until further notice.
Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually.
AEMO has determined that it has become impossible to operate the spot market in accordance with the provisions of the Rules due to ? Failure of SCADA systems in NSW.
Manager NEM Real Time Operation
Declaration of electricity market suspension
AEMO declares the spot market suspended in New South Wales with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 2015 hrs on 17 March 2023 until further notice.
Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually.
AEMO has determined that it has become impossible to operate the spot market in accordance with the provisions of the Rules due to ? Failure of SCADA systems in NSW.
Manager NEM Real Time Operation
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