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119691POWER SYSTEM EVENTS31/10/2024 03:45:23 AM
Update - Non-credible contingency event - NSW region - 31/10/2024
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - NSW region - 31/10/2024
Refer AEMO Electricity Market Notice 119689
At 0345 hrs the Wagga B 330 kV 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
Update - Non-credible contingency event - NSW region - 31/10/2024
Refer AEMO Electricity Market Notice 119689
At 0345 hrs the Wagga B 330 kV 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
119690INTER-REGIONAL TRANSFER31/10/2024 01:00:29 AM
Inter-regional transfer limit variation - Wagga B 330 kV Bus - NSW region - 31/10/2024
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Wagga B 330 kV bus- NSW region - 31/10/2024
At 0028 hrs 31/10/2024 there was an unplanned outage of Wagga B 330 kV bus.
The following constraint set(s) invoked at 0045 hrs 31/10/2024
N-WAGGA_330_BUSB, N-JNWG_RADIAL, V-DBUSS_L and V-DBUSS_T
This constraint set(s) contains equations with the following interconnectors on the LHS.
VIC1-NSW1,N-Q-MNSP1,NSW1-QLD1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Wagga B 330 kV bus- NSW region - 31/10/2024
At 0028 hrs 31/10/2024 there was an unplanned outage of Wagga B 330 kV bus.
The following constraint set(s) invoked at 0045 hrs 31/10/2024
N-WAGGA_330_BUSB, N-JNWG_RADIAL, V-DBUSS_L and V-DBUSS_T
This constraint set(s) contains equations with the following interconnectors on the LHS.
VIC1-NSW1,N-Q-MNSP1,NSW1-QLD1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
119689POWER SYSTEM EVENTS31/10/2024 12:49:14 AM
Non-credible contingency event - NSW region - 31/10/2024
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - NSW region - 31/10/2024
At 0028 hrs the Wagga B 330 kV bus tripped which offloaded the Wagga - Walla Walla SF 6Y 330 kV line and Wagga No.3 transformer.
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 - NSW region - 31/10/2024
At 0028 hrs the Wagga B 330 kV bus tripped which offloaded the Wagga - Walla Walla SF 6Y 330 kV line and Wagga No.3 transformer.
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
119688INTER-REGIONAL TRANSFER30/10/2024 06:15:38 PM
Inter-regional transfer limit variation - Moorabool - Sydenham No.1 500 kV line - VIC region - 30/10/2024
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Moorabool - Sydenham No.1 500 kV line - VIC region - 30/10/2024
A planned outage of Moorabool - Sydenham No.1 500 kV line in the VIC region was scheduled from 0500 hrs 22/10/2024 to 1930 hrs 01/11/2024.
The outage has been completed and Moorabool - Sydenham No.1 500 kV line returned to service at 1815 hrs 30/10/2024
Constraint set revoked: V-MLSY_NOEMTT_R
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Moorabool - Sydenham No.1 500 kV line - VIC region - 30/10/2024
A planned outage of Moorabool - Sydenham No.1 500 kV line in the VIC region was scheduled from 0500 hrs 22/10/2024 to 1930 hrs 01/11/2024.
The outage has been completed and Moorabool - Sydenham No.1 500 kV line returned to service at 1815 hrs 30/10/2024
Constraint set revoked: V-MLSY_NOEMTT_R
Manager NEM Real Time Operations
119668GENERAL NOTICE30/10/2024 12:29:13 PM
Update - Lightning vulnerable lines in Vic region
AEMO ELECTRICITY MARKET NOTICE.
Update - Lightning vulnerable lines in Vic region
Refer to AEMO Electricity Market Notice 119029
At 1525 hrs on 18/10/2024 the Rowville - Yallourn No. 7 220 kV Line and the Rowville - Yallourn No. 8 220 kV Line tripped and auto-reclosed.
The cause of the trip was identified as due to Lightning.
In accordance with SO_OP_3715, AEMO now considers the Rowville - Yallourn No. 7 220 kV Line and the Rowville - Yallourn No. 8 220 kV Line to be vulnerable with a category of probable due to Lightning.
Manager NEM Real Time Operations
Update - Lightning vulnerable lines in Vic region
Refer to AEMO Electricity Market Notice 119029
At 1525 hrs on 18/10/2024 the Rowville - Yallourn No. 7 220 kV Line and the Rowville - Yallourn No. 8 220 kV Line tripped and auto-reclosed.
The cause of the trip was identified as due to Lightning.
In accordance with SO_OP_3715, AEMO now considers the Rowville - Yallourn No. 7 220 kV Line and the Rowville - Yallourn No. 8 220 kV Line to be vulnerable with a category of probable due to Lightning.
Manager NEM Real Time Operations
119667GENERAL NOTICE29/10/2024 09:02:13 PM
Update - Pre dispatch demand forecast - Qld region
AEMO ELECTRICITY MARKET NOTICE
Update - Pre dispatch demand forecast - Qld region
Refer market notice: 119666
The issue relating to the Queensland Pre dispatch demand forecast has been resolved.
Manager NEM Real Time Operations
Update - Pre dispatch demand forecast - Qld region
Refer market notice: 119666
The issue relating to the Queensland Pre dispatch demand forecast has been resolved.
Manager NEM Real Time Operations
119666GENERAL NOTICE29/10/2024 07:43:09 PM
Pre dispatch demand forecast - Qld region
AEMO ELECTRICITY MARKET NOTICE
Pre dispatch demand forecast - Qld region
AEMO is aware of an error in the Queensland pre dispatch demand forecast.
AEMO is currently working to resolve the issue.
Dispatch results are not impacted.
Manager NEM Real Time Operations
Pre dispatch demand forecast - Qld region
AEMO is aware of an error in the Queensland pre dispatch demand forecast.
AEMO is currently working to resolve the issue.
Dispatch results are not impacted.
Manager NEM Real Time Operations
119626INTER-REGIONAL TRANSFER29/10/2024 11:27:47 AM
Cancellation - Inter-regional transfer limit variation - constraint automation to manage Power System Security in SA region - 29/10/2024
AEMO ELECTRICITY MARKET NOTICE
Refer AEMO Electricity Market Notice 119610
Constraint set CA_SYDS_5632AA58 was invoked from 0940 hrs until 10:45 hrs 29/10/2024.
This constraint set contains equations with the following interconnector on the LHS;
V-SA
Refer to AEMO Network Outage Scheduler (NOS) for further information.
Manager NEM Real Time Operations
Refer AEMO Electricity Market Notice 119610
Constraint set CA_SYDS_5632AA58 was invoked from 0940 hrs until 10:45 hrs 29/10/2024.
This constraint set contains equations with the following interconnector on the LHS;
V-SA
Refer to AEMO Network Outage Scheduler (NOS) for further information.
Manager NEM Real Time Operations
119610INTER-REGIONAL TRANSFER29/10/2024 09:46:29 AM
Inter-regional transfer limit variation - constraint automation to manage Power System Security in SA region - 29/10/2024
AEMO ELECTRICITY MARKET NOTICE
In order to maintain the power system in a secure operating state in the SA region, AEMO has invoked automated constraint set CA_SYDS_5632AA58 from 0940 hrs until further notice.
This constraint set contains equations with the following interconnector on the LHS;
V-SA
Refer to AEMO Network Outage Scheduler (NOS) for further information.
Manager NEM Real Time Operations
In order to maintain the power system in a secure operating state in the SA region, AEMO has invoked automated constraint set CA_SYDS_5632AA58 from 0940 hrs until further notice.
This constraint set contains equations with the following interconnector on the LHS;
V-SA
Refer to AEMO Network Outage Scheduler (NOS) for further information.
Manager NEM Real Time Operations