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Non-credible contingency event - VIC region - 14/06/2020
Non-credible contingency event - VIC region - 14/06/2020
At 0647 hrs the Eildon - Mt Beauty 1 220 kV Line tripped at Eildon 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 and is under investigation.
Manager NEM Real Time Operations
Update - Non-credible contingency event - NSW region - 07/06/2020
Refer AEMO ELECTRICITY MARKET NOTICE 75880
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 - NSW region - 07/06/2020
Non-credible contingency event - NSW region - 07/06/2020
At 1333 hrs the Vales Pt Unit 5 and the Vales Pt Unit 6 both 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
Update - Non-credible contingency event - NSW Region - 14/05/2020
Refer AEMO ELECTRICITY MARKET NOTICE MN 75716
At 0822 hrs the Burrinjuck 132 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
Non-credible contingency event - NSW Region - 14/05/2020
Non-credible contingency event - NSW Region - 14/05/2020
At 0439 hrs the Burrinjuck 132 kV bus tripped.
With a pre-existing outage of the Gadara - Wagga 993 132 kV line, the Tumut 132 substation, the Gadara substation and the Blowering power station were disconnected.
AEMO estimates 60 MW of local load lost.
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.
Constraint set N-BLOWERNG_ZERO invoked.
Manager NEM Real Time Operations
Non-credible contingency event - Qld region - 08/05/2020
Non-credible contingency event - Qld region - 08/05/2020
At 1112 hrs the Kamerunga-Barron George 7184 132 kV Line and the Kamerunga-Barron George 7143 132 kV 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 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 - 06/05/2020
Non-credible contingency event - Qld Region - 06/05/2020
At 1510 hrs the T26 Bileola No 2 132 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 has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.
Manager NEM Real Time Operations
Update - Non-credible contingency event - Vic region 11/04/2020
Refer market notice 75304
A non-credible contingency event occurred in the Vic region on 11/04/2020
At Yallourn Power Station the following units tripped:
Yallourn Unit 3 tripped at 1326 hrs, Yallourn Unit 1 tripped at 1328 hrs, Yallourn Unit 4 tripped at 1328 hrs
At 1326 hrs Macarthur Wind Farm 4 collector groups (300 MW) disconnected.
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
Non-credible contingency event - Vic region - 11/04/2020
At Yallourn Power Station the following units tripped
At 1326 hrs - Unit W3
At 1328 hrs - Units W1 and W4
also at 1326 hrs Macarthur Wind Farm 4 collector groups (300 MW) disconnected.
AEMO has not been advised of any disconnection of bulk electrical load.
AEMO did not instruct load shedding.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations