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118312RECLASSIFY CONTINGENCY18/09/2024 11:51:13 AM
Cancellation: Reclassification of non-credible contingency event due to existence of widespread abnormal condition - NEM region.
AEMO ELECTRICITY MARKET NOTICE.
AEMO considers the occurrence of a non-credible contingency event due to the widespread abnormal conditions advised in AEMO Electricity Market Notice 118311 is no longer reasonably possible and accordingly its classification has reverted to non-credible.
Cancellation time: 1145 hrs 18/09/2024.
No constraints were invoked during this event
Manager NEM Real Time Operations
AEMO considers the occurrence of a non-credible contingency event due to the widespread abnormal conditions advised in AEMO Electricity Market Notice 118311 is no longer reasonably possible and accordingly its classification has reverted to non-credible.
Cancellation time: 1145 hrs 18/09/2024.
No constraints were invoked during this event
Manager NEM Real Time Operations
118311RECLASSIFY CONTINGENCY18/09/2024 01:59:33 AM
Reclassification of non-credible contingency event due to existence of widespread abnormal condition/s - NEM regions
AEMO ELECTRICITY MARKET NOTICE.
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: 0200 hrs 18/09/2024 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
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: 0200 hrs 18/09/2024 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
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
118290RECLASSIFY CONTINGENCY16/09/2024 01:14:54 PM
Cancellation of Reclassification of a Non-Credible Contingency Event - QLD region - 30/04/2019
AEMO ELECTRICITY MARKET NOTICE
Cancellation of Reclassification of a Non-Credible Contingency Event: Nebo SVC and the Nebo No.2 275/132kV transformer - QLD region - 30/04/2019.
Refer AEMO Electricity Market Notice 68251
Based on advice from the participant, 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: QLD
Equipment: Nebo SVC and the Nebo No.2 275/132kV transformer
Cancellation time: 1315 hrs 16/09/2024
Constraint set(s) revoked: Nil
Manager NEM Real Time Operations
Cancellation of Reclassification of a Non-Credible Contingency Event: Nebo SVC and the Nebo No.2 275/132kV transformer - QLD region - 30/04/2019.
Refer AEMO Electricity Market Notice 68251
Based on advice from the participant, 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: QLD
Equipment: Nebo SVC and the Nebo No.2 275/132kV transformer
Cancellation time: 1315 hrs 16/09/2024
Constraint set(s) revoked: Nil
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
118269INTER-REGIONAL TRANSFER13/09/2024 03:57:07 PM
Inter-regional transfer limit variation - Armidale - Sapphire 8E 330 KV Line - NSW region - 13/09/2024
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Armidale - Sapphire 8E 330 KV Line - NSW region - 13/09/2024
A planned outage of Armidale - Sapphire 8E 330 KV Line in the NSW region was scheduled from 1630 hrs 11/09/2024 to 1330 hrs 14/09/2024.
The outage has been completed and Armidale - Sapphire 8E 330 KV Line returned to service at 1600 hrs 13/09/2024
Constraint set(s) revoked: N-ARSR_8E, N-TW_SVC
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Armidale - Sapphire 8E 330 KV Line - NSW region - 13/09/2024
A planned outage of Armidale - Sapphire 8E 330 KV Line in the NSW region was scheduled from 1630 hrs 11/09/2024 to 1330 hrs 14/09/2024.
The outage has been completed and Armidale - Sapphire 8E 330 KV Line returned to service at 1600 hrs 13/09/2024
Constraint set(s) revoked: N-ARSR_8E, N-TW_SVC
Manager NEM Real Time Operations
118261INTER-REGIONAL TRANSFER13/09/2024 11:39:13 AM
Inter-regional transfer limit variation - Armidale - Sapphire 8E 330 KV Line - NSW region - 13/09/2024
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Armidale - Sapphire 8E 330 KV Line - NSW region - 13/09/2024
A planned outage of Armidale - Sapphire 8E 330 KV Line in the NSW region was scheduled from 1630 hrs 11/09/2024 to 1330 hrs 13/09/2024.
The outage has been rescheduled for 1630 hrs 11/09/2024 to 1330 hrs 14/09/2024.
Constraint sets invoked: N-ARSR_8E, N-TW_SVC, N-DM_SVC
This constraint set(s) contains equations with the following interconnectors on the LHS.
NSW1-QLD1,T-V-MNSP1,N-Q-MNSP1,V-S-MNSP1,V-SA
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Armidale - Sapphire 8E 330 KV Line - NSW region - 13/09/2024
A planned outage of Armidale - Sapphire 8E 330 KV Line in the NSW region was scheduled from 1630 hrs 11/09/2024 to 1330 hrs 13/09/2024.
The outage has been rescheduled for 1630 hrs 11/09/2024 to 1330 hrs 14/09/2024.
Constraint sets invoked: N-ARSR_8E, N-TW_SVC, N-DM_SVC
This constraint set(s) contains equations with the following interconnectors on the LHS.
NSW1-QLD1,T-V-MNSP1,N-Q-MNSP1,V-S-MNSP1,V-SA
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
118258RECLASSIFY CONTINGENCY12/09/2024 05:09:25 PM
Cancellation of a Non-Credible Contingency Event: Bayswater - Mt Piper No.5A3 500kV line and Wollar - Mt Piper No.5A5 500kV line in NSW1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
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: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Cancellation time: 12/09/2024 17:09
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 118249
Auto-generated on behalf of Manager NEM Real Time Operations
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: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Cancellation time: 12/09/2024 17:09
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 118249
Auto-generated on behalf of Manager NEM Real Time Operations
118253RECLASSIFY CONTINGENCY12/09/2024 02:09:27 PM
Cancellation of a Non-Credible Contingency Event: Bannaby - Mt Piper 5A6 500kV line and Bannaby - Mt Piper 5A7 500kV line in NSW1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
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: NSW1
Lines: Bannaby - Mt Piper 5A6 500kV and Bannaby - Mt Piper 5A7 500kV
Cancellation time: 12/09/2024 14:09
Constraint set(s) revoked:
N-5A6+5A7_N-2 Constraint set contains the following interconnector(s) on the left hand side:
N-Q-MNSP1
NSW1-QLD1
VIC1-NSW1
Refer AEMO Electricity Market Notice 118250
Auto-generated on behalf of Manager NEM Real Time Operations
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: NSW1
Lines: Bannaby - Mt Piper 5A6 500kV and Bannaby - Mt Piper 5A7 500kV
Cancellation time: 12/09/2024 14:09
Constraint set(s) revoked:
N-5A6+5A7_N-2 Constraint set contains the following interconnector(s) on the left hand side:
N-Q-MNSP1
NSW1-QLD1
VIC1-NSW1
Refer AEMO Electricity Market Notice 118250
Auto-generated on behalf of Manager NEM Real Time Operations