Market Notices

114889CONSTRAINTS20/02/2024 07:23:40 AM

Update to system strength constraints in North Queensland

AEMO ELECTRICITY MARKET NOTICE

Refer to market notice 110677

AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland.
Due to commissioning of new feeder 8905 (H13 Ross - H39 Woree) 275kV line in Far North Queensland, the system normal system strength equations for low North Queensland demands and all Karreya stations out of service conditions have been revised.

A revision to the constraint equations will be implemented at 1400 hrs on Tuesday 20th February 2024.

The new system strength combinations have now published in a limits advice document on AEMO's website. For more information refer to the new limits advice: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice

This advice contains all the combinations for Queensland for system normal cases.

Below constraint equations in the Q-NIL set will be modified:

- Q_NIL_STRGTH_KBWF
- Q_NIL_STRGTH_KBWF_I
- Q_NIL_STRGTH_HAUSF
- Q_NIL_STRGTH_HAUSF_I
- Q_NIL_STRGTH_MEWF
- Q_NIL_STRGTH_MEWF_I

AEMO Operations
114880INTER-REGIONAL TRANSFER19/02/2024 02:31:03 PM

Inter-regional transfer limit variation -Directlink DC2 - NSW region - 19/02/2024

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Directlink DC2 - NSW region - 19/02/2024


A planned outage of Directlink DC2 in the NSW region was scheduled from 2000 hrs 16/02/2024 to 1701 hrs 20/02/2024.

The outage has been completed and Directlink DC2 returned to service at 1425 hrs 19/02/2024.

The following constraint set(s) revoked at 1425 hrs 19/02/2024
N-MBTE_1

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
114827INTER-REGIONAL TRANSFER16/02/2024 08:17:01 PM

Short Notice Outage - Directlink - NSW Region - 16 February 2024

AEMO ELECTRICITY MARKET NOTICE

Short Notice Outage - Directlink - NSW Region - 16 February 2024

A short notice outage of Directlink cable DC2 in the NSW Region.

Constraint set N-MBTE_1 invoked from 2010 hrs.

The constraint set contains equations with the following interconnector on the LHS:

N-Q-MNSP1

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


Manager NEM Real Time Operations
114810INTER-REGIONAL TRANSFER16/02/2024 02:44:54 PM

Inter-Regional Transfer limit variation - Directlink - NSW Region

AEMO ELECTRICITY MARKET NOTICE

Inter-Regional Transfer limit variation - Directlink - NSW Region

There has been an unplanned outage of all three legs of Directlink .

The following constraint set was invoked at 1440 hrs 16/02/2024

N-X_MBTE_3

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
114770INTER-REGIONAL TRANSFER15/02/2024 07:34:10 PM

Inter-regional transfer limit variation - Moorabool Sydenham 500 kV lines - Vic region - 15/02/2024

AEMO ELECTRICITY MARKET NOTICE

At 1905 hrs 15/02/2024 in the Victoria region interim work was completed at Moorabool and Sydenham terminal stations to provide additional 500 kV bus ties.

As a result of this completed work the South Australia region is no longer on a credible risk of separation.

Constraint set changes.

Invoked:
V-X_MLSY_MLTS_TIE

Revoked:

F-V-X_ML_BUSTIE_500
I-VS_050
S-X_BC_CP
V-X_MLSY

This constraint set(s) contains equations with the following interconnectors on the LHS.
T-V-MNSP1
V-SA
V-S-MNSP1
VIC1- NSW1
Rfer Market Notices 114577, 114768, 114686

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations
114759POWER SYSTEM EVENTS15/02/2024 02:06:23 PM

Update: Significant power system event - Victoria Region - Hazelwood transformers and Hazelwood PS - Jeeralang No 2 220kV -13/02/2024

AEMO ELECTRICITY MARKET NOTICE.

Update - Significant power system event - 13/02/2024

Refer AEMO Electricity Market Notices 114685

At 1247 hrs 15/02/2024 the Hazelwood PS - Jeeralang No 2 220kV line was returned to service in the Victoria region

All of the equipment has now been returned to service.

The cause of this significant power system 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
114688INTER-REGIONAL TRANSFER14/02/2024 03:05:05 AM

Inter-regional transfer limit variation: Hazelwood - South Morang No 1 500 kV Line (VIC) - Voltage Control

AEMO ELECTRICITY MARKET NOTICE

The Hazelwood - South Morang No 1 500 kV Line has been de-energised to manage voltages in the Victoria region.

The following constraint set was invoked at 0235 hrs 14/02/2024

V-HWSM

The constraint set contains equations with the following interconnectors on the LHS.

T-V-MNSP1
V-S-MNSP1
V-SA
VIC1-NSW1

Refer to AEMO Network Outage Scheduler (NOS) for return to service details

Manager NEM Real Time Operations
114687INTER-REGIONAL TRANSFER14/02/2024 01:30:25 AM

Inter-regional transfer limit variation: South Morang - Sydenham No 1 and 2 500 kV lines (VIC) - Voltage Control

AEMO ELECTRICITY MARKET NOTICE

The South Morang - Sydenham No 1 and 2 500 kV lines have been de-energised to manage voltages in the Victoria region.

The following constraint set was invoked at 0105 hrs 14/02/2024

V-SMSY

The constraint set contains equations with the following interconnectors on the LHS.

T-V-MNSP1
V-S-MNSP1
V-SA
VIC1-NSW1

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

Manager NEM Real Time Operations
114686INTER-REGIONAL TRANSFER14/02/2024 01:24:53 AM

Inter-regional transfer limit variation: Moorabool - Sydenham No1 and No2 500 kV lines - VIC region - 13/02/2024 -

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation: Moorabool - Sydenham No1 and No2 500 kV lines - 13/02/2024

At 1308 hrs 13/02/2024 the Moorabool - Sydenham No1 and No2 500 kV lines tripped.

Refer Market notices 114577 and 114625.

The following constraint set(s) are invoked :

V-X_MLSY
F-V-X_ML_BUSTIE_500
I-VS_050

These constraint set contains equations with the following interconnectors on the LHS.

T-V-MNSP1
V-SA
V-S-MNSP1
VIC1- NSW1

Refer to the Network outage scheduler (NOS) for more details:

Manager NEM Real Time Operations
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