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Update - Lightning vulnerable lines in QLD region
Update - Lightning vulnerable lines in QLD region
Refer to AEMO Electricity Market Notice 112794
At 2345 hrs 26/12/2023, the Clare South - Strathmore No.7208 and Strathmore - Clare South tee King Creek No.7128 132 kV Lines tripped.
The cause of the trip was identified as due to Lightning.
In accordance with SO_OP_3715, AEMO now considers the Clare South - Strathmore No.7208 and Strathmore - Clare South tee King Creek No.7128 132 kV Lines to be vulnerable with a category of "Probable" due to Lightning.
Manager NEM Real Time Operations
Non-credible contingency event - QLD region - 26/12/2023
Non-credible contingency event - QLD region - 26/12/2023
At 2345 hrs the Strathmore Clare South 7208 and the Strathmore Clare South Tee King Creek 7128 132kV lines 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
Inter-regional transfer limit variation - Pelican Point Circuit Breaker 8093 - SA region - 26/12/2023
Inter-regional transfer limit variation - Pelican Point Circuit Breaker 8093 - SA region - 26/12/2023
At 1832 hrs 26/12/2023 there was a short notice outage of Pelican Point Circuit Breaker 8093.
The following constraint set(s) invoked at 1855 hrs 26/12/2023
S-PPT_CB6727
This constraint set(s) contains equations with the following interconnectors on the LHS.
V-SA
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation: Hazelwood - South Morang No 1 500 kV Line (VIC) - Voltage Control
The Hazelwood - South Morang No 1 500 kV Line has been de-energised to manage voltages in the Victoria region.
The following constraint set was invoked at 0735 hrs 26/12/2023
V-HWSM
The constraint set contains equations with the following interconnectors on the LHS.
T-V-MNSP
V-S-MNSP1
V-SA
VIC1-NSW1
Refer to AEMO Network Outage Scheduler (NOS) for return to service details
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Greenbank - Mudgeeraba 835 275 kV line - QLD region - 25/12/2023
Inter-regional transfer limit variation - Greenbank - Mudgeeraba 835 275 kV line - QLD region - 25/12/2023
At 2102 hrs 25/12/2023 there was an unplanned outage of Greenbank - Mudgeeraba 835 275 kV line
Constraint set(s) invoked: Q-GBMU_835_836 from 2105 hrs
This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q_MNSP1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Greenbank - Molendinar 8824 275 kV line - QLD region - 25/12/2023
Inter-regional transfer limit variation - Greenbank - Molendinar 8824 275 kV line - QLD region - 25/12/2023
At 2057 hrs 25/12/2023 there was an unplanned outage of Greenbank - Molendinar 8824 275 kV line
The outage has been returned to service at 2125 hrs 25/12/2023
Constraint set(s) invoked: Q-GBMO_8824_8825 from 2105 hrs to 2125 hrs
This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q_MNSP1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
[EventId:202312241300_NRM_NSW1_VIC1_stopped] NEGRES CONSTRAINT NRM_NSW1_VIC1 ceased operating from 24 December 2023 13:00
Issued by Australian Energy Market Operator Ltd at 1300 hrs on 24 December 2023
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 24 December 2023.
Refer to market notice: 112657
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 1300 hrs on 24 December 2023.
This is an AEMO autogenerated Market Notice.
[EventId:202312241130_NRM_NSW1_VIC1_started] NEGRES CONSTRAINT NRM_NSW1_VIC1 started operating from 24 December 2023 11:30
Issued by Australian Energy Market Operator Ltd at 1130 hrs on 24 December 2023
ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 24 December 2023.
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 1130 hrs on 24 December 2023.
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:202312241030_NRM_NSW1_VIC1_stopped] NEGRES CONSTRAINT NRM_NSW1_VIC1 ceased operating from 24 December 2023 10:30
Issued by Australian Energy Market Operator Ltd at 1030 hrs on 24 December 2023
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 24 December 2023.
Refer to market notice: 112652
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 1030 hrs on 24 December 2023.
This is an AEMO autogenerated Market Notice.