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NON-CONFORMANCE Region SA1 Thursday, 15 August 2024
NON-CONFORMANCE SA1 Region Thursday, 15 August 2024
AEMO has declared the following units comprising an Aggregate Dispatch Group as non-conforming under clause 3.8.23 of the National Electricity Rules:
Units: TB2BG1, TB2BL1
Aggregate Dispatch Group: TB2HYB_ADG1
Duration: 15/08/2024 11:05 to 15/08/2024 12:40
Amount: -28 MW
Constraint: NC-S_TB2HYB_ADG1
Auto-generated on behalf of Manager NEM Real Time Operations
NON-CONFORMANCE Region SA1 Thursday, 15 August 2024
NON-CONFORMANCE SA1 Region Wednesday, 14 August 2024
AEMO has declared the following units comprising an Aggregate Dispatch Group as non-conforming under clause 3.8.23 of the National Electricity Rules:
Units: TB2BG1, TB2BL1
Aggregate Dispatch Group: TB2HYB_ADG1
Duration: 14/08/2024 15:50 to 15/08/2024 10:10
Amount: -28 MW
Constraint: NC-S_TB2HYB_ADG1
Auto-generated on behalf of Manager NEM Real Time Operations
NON-CONFORMANCE Region SA1 Wednesday, 14 August 2024
NON-CONFORMANCE SA1 Region Wednesday, 14 August 2024
AEMO has declared the following units comprising an Aggregate Dispatch Group as non-conforming under clause 3.8.23 of the National Electricity Rules:
Units: TB2BG1, TB2BL1
Aggregate Dispatch Group: TB2HYB_ADG1
Duration: 14/08/2024 10:30 to 14/08/2024 15:20
Amount: 26 MW
Constraint: NC-S_TB2HYB_ADG1
Auto-generated on behalf of Manager NEM Real Time Operations
Cancellation: Reclassification of non-credible contingency event due to existence of widespread abnormal condition - NEM region.
AEMO considers the occurrence of a non-credible contingency event due to the widespread abnormal conditions advised in AEMO Electricity Market Notice 117660 is no longer reasonably possible and accordingly its classification has reverted to non-credible.
Cancellation time: 0845hrs 14/08/2024.
No constraints were invoked during this event
Manager NEM Real Time Operations
[EventId:202408131120_NRM_NSW1_VIC1_stopped] NEGRES CONSTRAINT NRM_NSW1_VIC1 ceased operating from 13 August 2024 11:20
Issued by Australian Energy Market Operator Ltd at 1120 hrs on 13 August 2024
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 13 August 2024.
Refer to market notice: 117661
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 1120 hrs on 13 August 2024.
This is an AEMO autogenerated Market Notice.
[EventId:202408131035_NRM_NSW1_VIC1_started] NEGRES CONSTRAINT NRM_NSW1_VIC1 started operating from 13 August 2024 10:35
Issued by Australian Energy Market Operator Ltd at 1035 hrs on 13 August 2024
ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 13 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 1035 hrs on 13 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.
Reclassification of non-credible contingency event due to existence of widespread abnormal condition/s - NEM regions
AEMO has identified that a non-credible contingency event impacting the power system is more likely to occur and is considered reasonably possible because of the existence of widespread abnormal conditions namely Severe Space Weather Watch in the NEM regions.
AEMO has therefore reclassified the occurrence of a non-credible contingency event involving multiple plant due to these abnormal conditions as credible.
Duration: 2230 hrs 12/08/2024 until further notice
Need for further measures is being monitored and further measures may be implemented in line with the Power System Security Guidelines (SO_OP_3715).
Manager NEM Real Time Operations
Cancellation of the reclassification of a Non-Credible contingency event: Buronga - Balranald X3 220 kV line, Buronga - Red Cliffs 0X1 220 kV kV line and Buronga - Broken Hill X2 220 kV line in NSW
Cancellation of the reclassification of a Non-Credible contingency event as a Credible contingency event. AEMO considers the simultaneous trip of the following elements is no longer reasonably possible. Accordingly, its classification has reverted to a non-credible contingency event.
Region: NSW
Elements: Liddell - Buronga - Balranald X3 220 kV line, Buronga - Red Cliffs 0X1 220 kV kV line and Buronga - Broken Hill X2 220 kV line.
Cancellation time: 1915 hrs
Refer AEMO Electricity Market Notice 117595
Manager NEM Real Time Operations
Cancellation of a Non-Credible Contingency Event: Collinsville North - Proserpine No.7125 132 kV line and Collinsville North - Proserpine No.7126 132 kV line in QLD1 due to Lightning.
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: QLD1
Lines: Collinsville North - Proserpine No.7125 132 kV and Collinsville North - Proserpine No.7126 132 kV
Cancellation time: 12/08/2024 14:34
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 117653
Auto-generated on behalf of Manager NEM Real Time Operations