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Reclassification of non-credible contingency event due to existence of widespread abnormal condition/s - SA region.
AEMO has identified that a non-credible contingency event impacting the power system is more likely to occur and is considered reasonably possible 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 0220 hrs 08/07/2025.
Constraint set(s) invoked:
I-VS_250
Duration: 0220 hrs 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
Reclassification of a Non-Credible Contingency Event: Para-Templers West and Magill-Torrens Island A 275kV lines in SA due to severe weather warning.
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: 0030 hrs 08/07/2025 until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations
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.
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: 0030 hrs 08/07/2025 until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations
STPASA - Update of the Forecast Lack Of Reserve Level 2 (LOR2) in the SA Region on 10/07/2025
The Forecast LOR2 condition in the SA region advised in AEMO Electricity Market Notice No. 127990 has been updated at 1300 hrs 07/07/2025 to the following:
From 0000 hrs to 0100 hrs 10/07/2025.
The forecast capacity reserve requirement is 688 MW.
The minimum capacity reserve available is 659 MW.
AEMO is seeking a market response.
[AEMO has not yet estimated the latest time it would need to intervene through an AEMO intervention event.
AEMO Operations
STPASA - Update of the Forecast Lack Of Reserve Level 2 (LOR2) in the SA Region on 09/07/2025
The Forecast LOR2 condition in the SA region advised in AEMO Electricity Market Notice No. 127991 has been updated at 1300 hrs 07/07/2025 to the following:
1. From 0730 hrs to 2030 hrs 09/07/2025.
The forecast capacity reserve requirement is 767 MW.
The minimum capacity reserve available is 710 MW.
2. From 2100 hrs to 2359 hrs 09/07/2025.
The forecast capacity reserve requirement is 697 MW.
The minimum capacity reserve available is 566 MW.
AEMO is seeking a market response.
AEMO has not yet estimated the latest time it would need to intervene through an AEMO intervention event.
AEMO Operations
STPASA - Update of the Forecast Lack Of Reserve Level 2 (LOR2) in the SA Region on 09/07/2025
The Forecast LOR2 condition in the SA region advised in AEMO Electricity Market Notice No. 127989 has been updated at 1100 hrs 07/07/2025 to the following:
From 0600 hrs to 2359 hrs 09/07/2025.
The forecast capacity reserve requirement is 729 MW.
The minimum capacity reserve available is 566 MW.
AEMO is seeking a market response.
AEMO has not yet estimated the latest time it would need to intervene through an AEMO intervention event.
AEMO Operations
STPASA - Update of the Forecast Lack Of Reserve Level 2 (LOR2) in the SA Region on 10/07/2025
The Forecast LOR2 condition in the SA region advised in AEMO Electricity Market Notice No. 127988 has been updated at 0900 hrs 07/07/2025 to the following:
From 0000 hrs to 0200 hrs 10/07/2025.
The forecast capacity reserve requirement is 730 MW.
The minimum capacity reserve available is 660 MW.
AEMO is seeking a market response.
AEMO has not yet estimated the latest time it would need to intervene through an AEMO intervention event.
AEMO Operations
STPASA - Update of the Forecast Lack Of Reserve Level 2 (LOR2) in the SA Region on 09/07/2025
The Forecast LOR2 condition in the SA region advised in AEMO Electricity Market Notice No. 127988 has been updated at 0900 hrs 07/07/2025 to the following:
1. From 0630 hrs to 2200 hrs 09/07/2025.
The forecast capacity reserve requirement is 747 MW.
The minimum capacity reserve available is 691 MW.
2. From 2230 hrs to 2359 hrs 09/07/2025.
The forecast capacity reserve requirement is 731 MW.
The minimum capacity reserve available is 667 MW.
AEMO is seeking a market response.
AEMO has not yet estimated the latest time it would need to intervene through an AEMO intervention event.
AEMO Operations
STPASA - Update of the Forecast Lack Of Reserve Level 2 (LOR2) in the SA Region beginning on 09/07/2025
The Forecast LOR2 condition in the SA region advised in AEMO Electricity Market Notice No. 127971 has been updated to the following:
[1.] From 0600 hrs 09/07/2025 to 0130 hrs 10/07/2025.
The forecast capacity reserve requirement is 737 MW.
The minimum capacity reserve available is 667 MW.
AEMO is seeking a market response.
AEMO has not yet estimated the latest time it would need to intervene through an AEMO intervention event.
Manager NEM Real Time Operations