Market Notices

127752RECLASSIFY CONTINGENCY23/06/2025 09:41:56 PM

Reclassification of a Non-Credible Contingency Event: Yallourn - Rowville 7 220 kV line and Yallourn - Rowville 8 220 kV line in VIC1 due to Lightning.

AEMO ELECTRICITY MARKET NOTICE

Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.

Region: VIC1

Lines: Yallourn - Rowville 7 220 kV and Yallourn - Rowville 8 220 kV

Duration: 23/06/2025 21:41 until further notice

Constraint set(s) invoked:
V-ROYP78_R_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NONE


Auto-generated on behalf of Manager NEM Real Time Operations
     
127751RECLASSIFY CONTINGENCY23/06/2025 09:29:34 PM

Reclassification of non-credible contingency event due to existence of widespread abnormal conditions - SA region.

AEMO ELECTRICITY MARKET NOTICE.
AEMO has identified that a non-credible contingency event impacting the power system is more likely to occur and is considered reasonably possible in the Mount Lofty Ranges, Upper South East, Lower South East, Adelaide Metro, Mount Lofty Ranges, Mid North and Murraylands districts because of the existence of widespread abnormal conditions namely severe weather in the SA region.
AEMO has therefore reclassified the occurrence of a non-credible contingency event involving multiple plant due to these abnormal conditions as credible.

AEMO has taken the following action(s) to maintain power system security at 2130 hrs 23/06/2025

Constraint set(s) invoked: I-VS_250

Duration: until further notice

Need for further measures is being monitored and further measures may be implemented in line with the Power System Security Guidelines (SO_OP_3715).

Manager NEM Real Time Operations
     
127750RECLASSIFY CONTINGENCY23/06/2025 07:49:15 PM

Reclassification of a Non-Credible Contingency Event: Eildon PS - Mt Beauty No.1 220 kV line and Eildon PS - Mt Beauty No.2 220 kV line in VIC1 due to Lightning.

AEMO ELECTRICITY MARKET NOTICE

Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.

Region: VIC1

Lines: Eildon PS - Mt Beauty No.1 220 kV and Eildon PS - Mt Beauty No.2 220 kV

Duration: 23/06/2025 19:49 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations
     
127749RECLASSIFY CONTINGENCY23/06/2025 06:16:56 PM

Reclassification of a Non-Credible Contingency Event: Para-Templers West and Magill-Torrens Island A 275kV lines in SA due to severe weather warning.

AEMO ELECTRICITY MARKET NOTICE.

Reclassification of a non-credible contingency event as a credible contingency event due to severe weather warning.
AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.

Region: SA
Lines: Para-Templers West and Magill-Torrens Island A 275kV lines
Duration: 1810 hrs 23/06/2025 until further notice
Constraint set(s) invoked: Nil

Manager NEM Real Time Operations
     
127748RECLASSIFY CONTINGENCY23/06/2025 06:16:40 PM

Reclassification of a Non-Credible Contingency Event: Brinkworth-Davenport, Brinkworth-Templers West and Para-Templers West 275kV lines in SA due to severe weather warning.

AEMO ELECTRICITY MARKET NOTICE.

Reclassification of a non-credible contingency event as a credible contingency event due to severe weather warning.
AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.

Region: SA
Lines: Brinkworth-Davenport, Brinkworth-Templers West and Para-Templers West 275kV lines
Duration: 1810 hrs 23/06/2025 until further notice
Constraint set(s) invoked: Nil

Manager NEM Real Time Operations
     
127747MARKET INTERVENTION23/06/2025 07:09:33 PM

Cancellation - Direction - NSW region - 23/06/2025

AEMO ELECTRICITY PARTICIPANT NOTICE

Cancellation - Direction - NSW region - 23/06/2025

Refer to Market Notice 127745.

The requirement for AEMO to issue a direction to maintain the power system in a secure operating state has ended. All associated directions are cancelled from 1907hrs on 23/06/2025.

Manager NEM Real Time Operations
     
127745MARKET INTERVENTION23/06/2025 06:00:38 PM

Direction - NSW region 23/06/2025

AEMO ELECTRICITY MARKET NOTICE.

Direction - NSW region 23/06/2025

In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the NSW region.

The direction was necessary to maintain the power system in a secure operating state.

AEMO may issue or revoke additional directions in order to meet the current requirement, unless sufficient market response is provided.

A further market notice will be issued when all directions related to this requirement have been cancelled.

For the purposes of the National Electricity Rules this was a clause 4.8.9 instruction under clause 4.8.9(a).


Manager NEM Real Time Operations
     
127743INTER-REGIONAL TRANSFER23/06/2025 05:44:44 PM

Inter-regional transfer limit variation - Darlington Point - Wagga No.63 330 kV line - NSW region - 23/06/2025

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Darlington Point - Wagga No.63 330 kV line - NSW region - 23/06/2025

At 1719 hrs 23/06/2025 there was an unplanned outage of Darlington Point - Wagga No.63 330 kV line. The Darlington Point - Balranald No. X5 220 kV line consequently tripped due to a control scheme for the trip of the above line as per design.

The following constraint set(s) invoked at 1725 hrs 23/06/2025
N-DPWG_63_X5

This constraint set(s) contains equations with the following interconnectors on the LHS.
VIC1-NSW1,N-Q-MNSP1,NSW1-QLD1,V-S-MNSP1,V-SA

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations
     
127742RESERVE NOTICE24/06/2025 12:19:21 PM

RESERVE NOTICE MT PASA 24 June 2025

The MTPASA results published on 24 June 2025 identifies no Low Reserve Conditions.

MT PASA provides early information to the market on potential reliability issues, enabling the market to respond proactively and potentially avoid the need for AEMO intervention.

For further information, please refer to:
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data/Market-Management-System-MMS/Projected-Assessment-of-System-Adequacy

This notice supersedes Market Notice 127606 published on 17 June 2025.

Background

As part of a broader process of implementing the reliability standard, AEMO runs the Medium Term Projected Assessment of System Adequacy (MTPASA) process weekly to forecast expected unserved energy levels over a two year period. If the expected annual unserved energy exceeds the maximum level specified by the Reliability Standard, a Low Reserve Condition is identified.

For more information about how AEMO implements the reliability standard, please view the Reliability Standard Implementation Guidelines (RSIG) available on AEMO's website at https://www.aemo.com.au/Electricity/National

Forecasting

AEMO
     
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