Market Notices

AEMO ELECTRICITY MARKET NOTICE

Update - Inter-regional transfer limit variation - Tungkillo- Robertstown No.1 275kV line - SA region - 28/11/2023

At 0547 hrs 28/11/2023 the Tungkillo- Robertstown No.1 275kV line was returned to service.

The following constraint set(s) was revoked at 0600hrs 28/11/2023
S-RBTU

This constraint set(s) contains equations with the following interconnectors on the LHS.
V-S-MNSP1,V-SA

Manager NEM Real Time Operations

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Inter-regional transfer limit variation - Tungkillo- Robertstown 275kV line - SA region - 28/11/2023

At 0535 hrs 28/11/2023 there was an unplanned outage of Tungkillo- Robertstown 275kV line.

The following constraint set(s) invoked at 0545 hrs 28/11/2023
S-RBTU

This constraint set(s) contains equations with the following interconnectors on the LHS.
V-S-MNSP1,V-SA

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Templers-Waterloo 132kV line - SA region - 28/11/2023

At 0501 hrs 28/11/2023 there was an unplanned outage of Templers-Waterloo 132kV line.

The following constraint set(s) invoked at 0510 hrs 28/11/2023
S-X_WTTP+CB

This constraint set(s) contains equations with the following interconnectors on the LHS.
V-S-MNSP1

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Middle Ridge - Greenbank No 8848 275 kV line - QLD region - 26/11/2023

At 0657 hrs 26/11/2023 there was an short notice outage of Middle Ridge - Greenbank No 8848 275 kV line to manage voltage in the QLD Region.

The following constraint set invoked at 0705 hrs 26/11/2023
Q-MRGB_8848_8849

This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q_MNSP1
NSW1-QLD1
Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - constraint to manage Power System Security - TAS region - 18/11/2023

In order to maintain the power system in a secure operating state in the TAS region, AEMO has invoked the following constraint from 1240 hrs to 1255 hrs.

Constraint set(s) invoked: I-VT_350

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


Manager NEM Real Time Operations

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Inter-regional transfer limit variation - Armidale SVC - NSW region - 12/11/2023

At 0031 hrs 12/11/2023 there was an unplanned outage of Armidale SVC.

The following constraint set(s) invoked at 0040 hrs 12/11/2023
N-AR_VC1
N-X_AR+LS_SVC

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

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-Regional Transfer limit variation - Directlink - NSW Region

There has been an unplanned outage of the No 3 Leg of Directlink .

The following constraint set was invoked at 1245 hrs 06/11/2023

N-MBTE_1

The constraint set contains the following interconnector on the left hand side.

N-Q-MNSP1

Refer AEMO Network Outage Scheduler (NOS) for further details.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Ararat - Crowlands 220kV line in Vic region - 02/11/2023

A planned outage of Ararat - Crowlands 220kV line in the Vic region was scheduled from 0600 hrs 01/11/2023 to 1700 hrs 03/11/2023.

The outage has been completed and Ararat - Crowlands 220kV line returned to service at 1705 hrs 02/11/2023

Constraint set(s) revoked: V-ARCW

This constraint set(s) contains equations with the following interconnectors on the LHS.
T-V-MNSP1
V-SA
V-S-MNSP1
VIC1- NSW1

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

AEMO has completed a comprehensive review on voltage oscillation issue in south-west Victoria with consideration of wider asynchronous generators in the area. The voltage oscillation occurs in the south-west region when Heywood interconnector flow is higher than 500 MW from South Australia to Victoria.

The limit will manage the total MW output from Stockyard Hill, Dundonnell and Macarthur wind farms during period when flow on Heywood interconnector higher than 500 MW towards Victoria.

The new constraint equation includes asynchronous generators in south-west Victoria on the left-hand side. This limit is to replace the existing south-west Victoria voltage oscillation limit. Full details on the limits advice are to be published shortly on the AEMO website: https://aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice

The following changes will be implemented at 1000 hrs on Friday 3rd November 2023
? Constraint equation will be removed from constraint set V-NIL:
V_SHWF_FLT_286

? Constraint equation will be implemented and added to constraint set V-NIL:
V_SH_DD_MAC_FLT_965

For full details on the formulation, the new constraint equation has now been loaded into AEMO's pre-production systems.

For further details on this change please contact terry.liu@aemo.com.au

Terry Liu
AEMO Operations