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118525SETTLEMENTS RESIDUE29/09/2024 07:00:26 PM
[EventId:202409291900_NRM_NSW1_VIC1_stopped] NEGRES CONSTRAINT NRM_NSW1_VIC1 ceased operating from 29 September 2024 19:00
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1900 hrs on 29 September 2024
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 29 September 2024.
Refer to market notice: 118524
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 1900 hrs on 29 September 2024.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1900 hrs on 29 September 2024
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 29 September 2024.
Refer to market notice: 118524
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 1900 hrs on 29 September 2024.
This is an AEMO autogenerated Market Notice.
118524SETTLEMENTS RESIDUE29/09/2024 06:20:24 PM
[EventId:202409291820_NRM_NSW1_VIC1_started] NEGRES CONSTRAINT NRM_NSW1_VIC1 started operating from 29 September 2024 18:20
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1820 hrs on 29 September 2024
ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 29 September 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 1820 hrs on 29 September 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.
Issued by Australian Energy Market Operator Ltd at 1820 hrs on 29 September 2024
ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 29 September 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 1820 hrs on 29 September 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.
118506INTER-REGIONAL TRANSFER29/09/2024 03:29:13 AM
Inter-regional transfer limit variation - Stockdill - Upper Tumut 1 330 kV line- NSW region - 29/09/2024
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Stockdill - Upper Tumut 1 330 kV line - NSW region - 29/09/2024
At 0313 hrs 29/09/2024 there was an unplanned outage of Stockdill - Upper Tumut 1 330 kV line.
The following constraint set invoked at 0320 hrs 29/09/2024
N-SDUT_1
This constraint set contains equations with the following interconnectors on the LHS.
V-S-MNSP1
VIC1-NSW1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Stockdill - Upper Tumut 1 330 kV line - NSW region - 29/09/2024
At 0313 hrs 29/09/2024 there was an unplanned outage of Stockdill - Upper Tumut 1 330 kV line.
The following constraint set invoked at 0320 hrs 29/09/2024
N-SDUT_1
This constraint set contains equations with the following interconnectors on the LHS.
V-S-MNSP1
VIC1-NSW1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
118323CONSTRAINTS19/09/2024 04:20:22 PM
Update to system normal constraint equation in NSW for transient voltage stability in south-west NSW
AEMO ELECTRICITY MARKET NOTICE
Refer to market notice 92840.
Transgrid has advised AEMO of an update to the transient voltage stability limit in south-west NSW for loss of Darlington Point to Wagga (63) 330 kV line. The limit will include terms for the Darlington Point and Riverina BESS.
The following constraint equation will be updated with the above changes at 1100 hrs Friday 20th September 2024.
N::N_NIL_63
For full details on the formulation, the new constraint equation has now been loaded into AEMO's pre-production systems.
For further details on these constraint equation please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
Refer to market notice 92840.
Transgrid has advised AEMO of an update to the transient voltage stability limit in south-west NSW for loss of Darlington Point to Wagga (63) 330 kV line. The limit will include terms for the Darlington Point and Riverina BESS.
The following constraint equation will be updated with the above changes at 1100 hrs Friday 20th September 2024.
N::N_NIL_63
For full details on the formulation, the new constraint equation has now been loaded into AEMO's pre-production systems.
For further details on these constraint equation please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
118322POWER SYSTEM EVENTS19/09/2024 04:16:27 PM
Update - Non-credible contingency event - TAS region - 19/09/2024
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - TAS region - 19/09/2024
Refer AEMO Electricity Market Notice 118321
At 1446 hrs the Gordon - Chapel St No 1 and No 2 220 kV lines were returned to service.
This non-credible contingency event was caused by lightning. 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.
Manager NEM Real Time Operations
Update - Non-credible contingency event - TAS region - 19/09/2024
Refer AEMO Electricity Market Notice 118321
At 1446 hrs the Gordon - Chapel St No 1 and No 2 220 kV lines were returned to service.
This non-credible contingency event was caused by lightning. 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.
Manager NEM Real Time Operations
118321POWER SYSTEM EVENTS19/09/2024 03:28:41 PM
Update - Non-credible contingency event - TAS region - 19/09/2024
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - TAS region - 19/09/2024
At 1340 hrs the Gordon - Chapel St No1 and No 2 220 kV lines tripped.
AEMO did not instruct load shedding.
AEMO has advised of approximately 112 MW disconnection of bulk electrical load,
disconnection of generation at Studland Bay Wind generator (71 MW) and 23 MW generation reduction at Gordon Power station.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
Update - Non-credible contingency event - TAS region - 19/09/2024
At 1340 hrs the Gordon - Chapel St No1 and No 2 220 kV lines tripped.
AEMO did not instruct load shedding.
AEMO has advised of approximately 112 MW disconnection of bulk electrical load,
disconnection of generation at Studland Bay Wind generator (71 MW) and 23 MW generation reduction at Gordon Power station.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
118320POWER SYSTEM EVENTS19/09/2024 01:54:59 PM
Non-credible contingency event - TAS region - 19/09/2024
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - TAS region - 19/09/2024
At 1340 hrs the Gordon - Chapel St No1 and No 2 220 kV 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
Non-credible contingency event - TAS region - 19/09/2024
At 1340 hrs the Gordon - Chapel St No1 and No 2 220 kV 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
118301INTER-REGIONAL TRANSFER17/09/2024 12:21:32 PM
Inter-regional transfer limit variation -South East to Tailem Bend No 1 275 KV Line - SA region - 17/09/2024
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - South East to Tailem Bend No 1 275 KV Line - SA region - 17/09/2024
At 1034 hrs 17/09/2024 there was a short notice outage of South East to Tailem Bend No 1 275 KV Line.
The following constraint set(s) invoked at 1035 hrs 20/09/2024
S-TBSE,
S-BC_CP
This constraint set(s) contains equations with the following interconnectors on the LHS.
V-SA,NSW1-QLD1,T-V-MNSP1,V-S-MNSP1,VIC1-NSW1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - South East to Tailem Bend No 1 275 KV Line - SA region - 17/09/2024
At 1034 hrs 17/09/2024 there was a short notice outage of South East to Tailem Bend No 1 275 KV Line.
The following constraint set(s) invoked at 1035 hrs 20/09/2024
S-TBSE,
S-BC_CP
This constraint set(s) contains equations with the following interconnectors on the LHS.
V-SA,NSW1-QLD1,T-V-MNSP1,V-S-MNSP1,VIC1-NSW1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
118271INTER-REGIONAL TRANSFER14/09/2024 01:26:46 PM
Inter-regional transfer limit variation - Braemar No2 330 kV / 275 kV Transformer. - QLD region - 14/09/2024
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Braemar No2 330 kV / 275 kV Transformer. - QLD region - 14/09/2024
At 1320 hrs 14/09/2024 there was a short notice outage of Braemar No2 330 kV / 275 kV Transformer.
The following constraint set(s) invoked at 1320 hrs 14/09/2024
Q-BRTX2
This constraint set(s) contains equations with the following interconnectors on the LHS.
NSW1-QLD1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Braemar No2 330 kV / 275 kV Transformer. - QLD region - 14/09/2024
At 1320 hrs 14/09/2024 there was a short notice outage of Braemar No2 330 kV / 275 kV Transformer.
The following constraint set(s) invoked at 1320 hrs 14/09/2024
Q-BRTX2
This constraint set(s) contains equations with the following interconnectors on the LHS.
NSW1-QLD1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations