Market Notices

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
     
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
     
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
     
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
     
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
     
119323INTER-REGIONAL TRANSFER24/10/2024 02:49:29 PM

Inter-regional transfer limit variation - [outage element] - NSW region - 24/10/2024

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - [outage element] - NSW region - 24/10/2024

At 1435 hrs 24/10/2024 there was an unplanned outage of Directlink cable 1 and cable 3 (note cable 2 was on a prior outage).

The following constraint set(s) invoked at 1445 hrs 24/10/2024
N-X_MBTE_3

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
     
119202INTER-REGIONAL TRANSFER23/10/2024 06:42:52 AM

Inter-regional transfer limit variation - constraint automation to manage Power System Security in VIC region - 23/10/2024

AEMO ELECTRICITY MARKET NOTICE

In order to maintain the power system in a secure operating state in the VIC region, AEMO has invoked automated constraint set CA_SYDS_562A9792 from 0635 hrs until further notice.

This constraint set contains equations with the following interconnector on the LHS;

V-S-MNSP1
V-SA
VIC1-NSW1

Refer to AEMO Network Outage Scheduler (NOS) for further information.

Manager NEM Real Time Operations
     
119056INTER-REGIONAL TRANSFER19/10/2024 01:10:23 PM

Inter-regional transfer limit variation - Tamworth No 1 330 kV bus and Tamworth - Armidale No. 86 330 kV Line - NSW region - 19/10/2024

AEMO ELECTRICITY MARKET NOTICE

Tamworth No 1 330 kV bus and Tamworth - Armidale No. 86 330 kV Line - NSW region - 19/10/2024

A planned outage of Tamworth No 1 330 kV bus in the NSW region was scheduled from 1100 hrs 18/10/2024 to 1700 hrs 20/10/2024.
A planned outage of Tamworth - Armidale No. 86 330 kV Line in the NSW region was scheduled from 0500 hrs 09/10/2024 to 1700 hrs 20/10/2024.

The outage has been completed by 1250 hrs 19/10/2024.

Constraint set(s) invoked:
N-ARTW_86
N-LDTW_84
N-TW_SVC
N-TW_330_BUS1

This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q-MNSP1
NSW1-QLD1
T-V-MNSP1


Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations
     
119029POWER SYSTEM EVENTS18/10/2024 03:48:56 PM

Non-credible contingency event - VIC region - 18/10/2024

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - VIC region - 18/10/2024

At 1525 hrs the Rowville - Yallourn No. 7 220 kV Line and the Rowville - Yallourn No. 8 220 kV Line tripped and auto-reclosed.

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
     
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