Market Notices

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE QLD1 Region Saturday, 14 June 2025

AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:

Unit: YARANSF1
Duration: 14/06/2025 11:10 to 14/06/2025 12:05
Amount: 67 MW
Constraint: NC-Q_YARANSF1

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AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE NSW1 Region Friday, 13 June 2025

AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:

Unit: CAPBES1
Duration: 13/06/2025 03:35 to 13/06/2025 04:00
Amount: -35 MW
Constraint: NC-N_CAPBES1

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AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE VIC1 Region Thursday, 12 June 2025

AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:

Unit: YWPS4
Duration: 12/06/2025 00:05 to 12/06/2025 00:10
Amount: 14 MW
Constraint: NC-V_YWPS4

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AEMO ELECTRICITY MARKET NOTICE

Cancellation- Inter-regional transfer limit variation - constraint automation to manage Power System Security in NSW region - 11/06/2025

Refer AEMO Electricity Market Notice 127501

In order to maintain the power system in a secure operating state in the NSW region, AEMO invoked automated constraint set CA_SYDS_575BC182 from 1755 hrs until 1810 hrs.

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

N-Q-MNSP1


Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - QLD region - 11/06/2025

Refer AEMO Electricity Market Notice 127500

At 1050 hrs the Belmont - Loganlea 829 275 kV line was returned to service and previously (11/06/25) the Belmont (H3) No. 1 275 kV bus had 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

AEMO ELECTRICITY MARKET NOTICE

In order to maintain the power system in a secure operating state in the NSW region, AEMO has invoked automated constraint set CA_SYDS_575BC182 from 1755 hrs until further notice.

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

N-Q-MNSP1


Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - QLD region - 11/06/2025

Refer AEMO Electricity Market Notice 127499

At 1713 hrs the Belmont (H3) No.1 275 kV bus and Loganlea - Belmont (829) 275 kV line tripped.

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

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - QLD region - 11/06/2025

At 1713 hrs the Belmont (H3) No.1 275 kV bus tripped.

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

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Collector - Yass (3L) 330kV line - NSW region - 11/06/2025

A planned outage of Collector - Yass (3L) 330kV line in the NSW region was scheduled from 0700 hrs 10/06/2025 to 1500 hrs 16/06/2025.

The outage has been completed and Collector - Yass (3L) 330kV line returned to service at 1611 hrs 11/06/2025

Constraint set(s) revoked: N-CTYS_3L_WG_CLOSE

Manager NEM Real Time Operations