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Non-credible contingency event - VIC region - 28/08/2024
Non-credible contingency event - VIC region - 28/08/2024
At 0001 hrs the APD No1 Potline and the APD No 2 Potline tripped.
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
[EventId:202408271910_NRM_NSW1_VIC1_stopped] NEGRES CONSTRAINT NRM_NSW1_VIC1 ceased operating from 27 August 2024 19:10
Issued by Australian Energy Market Operator Ltd at 1910 hrs on 27 August 2024
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 27 August 2024.
Refer to market notice: 117905
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the NSW to VIC directional interconnector.
The negative residue constraint NRM_NSW1_VIC1 ceased operating at 1910 hrs on 27 August 2024.
This is an AEMO autogenerated Market Notice.
[EventId:202408271810_NRM_NSW1_VIC1_started] NEGRES CONSTRAINT NRM_NSW1_VIC1 started operating from 27 August 2024 18:10
Issued by Australian Energy Market Operator Ltd at 1810 hrs on 27 August 2024
ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 27 August 2024.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the NSW to VIC directional interconnector.
The negative residue constraint set NRM_NSW1_VIC1 commenced operating from 1810 hrs on 27 August 2024.
This constraint set contains an equation with the following interconnectors on the LHS:
VIC1-NSW1
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
[EventId:202408271530_NRM_QLD1_NSW1_stopped] NEGRES CONSTRAINT NRM_QLD1_NSW1 ceased operating from 27 August 2024 15:30
Issued by Australian Energy Market Operator Ltd at 1530 hrs on 27 August 2024
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 27 August 2024.
Refer to market notice: 117877
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the QLD to NSW directional interconnector.
The negative residue constraint NRM_QLD1_NSW1 ceased operating at 1530 hrs on 27 August 2024.
This is an AEMO autogenerated Market Notice.
[EventId:202408271435_NRM_QLD1_NSW1_started] NEGRES CONSTRAINT NRM_QLD1_NSW1 started operating from 27 August 2024 14:35
Issued by Australian Energy Market Operator Ltd at 1435 hrs on 27 August 2024
ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 27 August 2024.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the QLD to NSW directional interconnector.
The negative residue constraint set NRM_QLD1_NSW1 commenced operating from 1435 hrs on 27 August 2024.
This constraint set contains an equation with the following interconnectors on the LHS:
N-Q-MNSP1
NSW1-QLD1
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
[EventId:202408271230_NRM_QLD1_NSW1_stopped] NEGRES CONSTRAINT NRM_QLD1_NSW1 ceased operating from 27 August 2024 12:30
Issued by Australian Energy Market Operator Ltd at 1230 hrs on 27 August 2024
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 27 August 2024.
Refer to market notice: 117834
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the QLD to NSW directional interconnector.
The negative residue constraint NRM_QLD1_NSW1 ceased operating at 1230 hrs on 27 August 2024.
This is an AEMO autogenerated Market Notice.
[EventId:202408271135_NRM_QLD1_NSW1_started] NEGRES CONSTRAINT NRM_QLD1_NSW1 started operating from 27 August 2024 11:35
Issued by Australian Energy Market Operator Ltd at 1135 hrs on 27 August 2024
ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 27 August 2024.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the QLD to NSW directional interconnector.
The negative residue constraint set NRM_QLD1_NSW1 commenced operating from 1135 hrs on 27 August 2024.
This constraint set contains an equation with the following interconnectors on the LHS:
N-Q-MNSP1
NSW1-QLD1
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
Update - Non-credible contingency event - TAS region - 25/08/2024
Update - Non-credible contingency event - TAS region - 25/08/2024
Refer AEMO Electricity Market Notice 117782
At 1023 hrs the New Norfolk A 110kV 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 - TAS region - 25/08/2024
Non-credible contingency event - TAS region - 25/08/2024
At 0850 hrs the New Norfolk A 110kV 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