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Non-credible contingency event - QLD region - 29/11/2023
Non-credible contingency event - QLD region - 29/11/2023
At 1421 hrs the R2 Braemar No.4 275 kV Busbar and R2 Braemar - S5 Western Downs No.8820 275 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 is not known at this stage.
Manager NEM Real Time Operations
Update - Non-credible contingency event - SA region - 28/11/2023
Update - Non-credible contingency event - SA region - 28/11/2023
Refer AEMO Electricity Market Notice 111779
Based on revised information, at 0534 hrs the Tungkillo- Robertstown No.1 and No.2 275kV lines tripped simultaneously. At 0536 hrs the Robertstown No.1 and No.2 synchronous condensers tripped simultaneously as a result.
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 - 28/11/2023
Non-credible contingency event - SA region - 28/11/2023
At 0536 hrs the Robertstown No1 syncon and the Robertstown No2 syncon tripped simultaneously.
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 - SA region - 14/11/2023
Update - Non-credible contingency event - SA region - 14/11/2023
Refer AEMO Electricity Market Notice 111252
At 1124 hrs the Para 275kV West Left 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 - SA region - 14/11/2023
Non-credible contingency event - SA region - 14/11/2023
At 1045hrs the Para 275kV West Left 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
Update - Non-credible contingency event - VIC region - 03/11/2023
Update - Non-credible contingency event - VIC region - 03/11/2023
Refer AEMO Electricity Market Notice 110687
At 0845 hrs the Mount Beauty No.2 220kV 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 - VIC region - 03/11/2023
Non-credible contingency event - VIC region - 03/11/2023
At 0412 hrs the Mount Beauty No.2 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 is not known at this stage.
Manager NEM Real Time Operations
Cancellation of Actual (LOR2) condition in the SA region - 27/10/2023
Cancellation of Actual (LOR2) condition in the SA region - 27/10/2023
The Actual LOR2 Condition in the SA Region advised in AEMO Electricity Market Notice No.110559 is cancelled at 2015 hrs 27/10/2023.
Manager NEM Real Time Operations
Actual Lack Of Reserve Level 2 (LOR2) in the SA region - 27/10/2023
Actual Lack Of Reserve Level 2 (LOR2) in the SA region - 27/10/2023
An Actual LOR2 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the SA region from 1930 hrs.
The Actual LOR2 condition is not forecast in Pre Dispatch
The capacity reserve required is 480 MW
The minimum reserve available is 465 MW
AEMO is seeking an immediate market response.
An insufficient market response may require AEMO to implement a AEMO intervention event.
Manager NEM Real Time Operations