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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 to maintain power system security at 1305 hrs 24/06/2025.
Constraint set invoked:
I-VS_250
Duration: 1305 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
STPASA - Forecast Lack Of Reserve Level 2 (LOR2) in the SA Region on 01/07/2025
AEMO declares a Forecast LOR2 condition under clause 4.8.4(b) of the National Electricity Rules for the SA region for the following period:
From 0000 hrs to 0400 hrs 01/07/2025.
The forecast capacity reserve requirement is 200 MW.
The minimum capacity reserve available is 102 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 30/06/2025
The Forecast LOR2 condition in the SA region advised in AEMO Electricity Market Notice No. 127774 has been updated at 1000 hrs 24/06/2025 to the following:
1. From 0700 hrs to 1030 hrs 30/06/2025.
The forecast capacity reserve requirement is 200 MW.
The minimum capacity reserve available is 42 MW.
2. From 1700 hrs to 2359 hrs 30/06/2025.
The forecast capacity reserve requirement is 200 MW.
The minimum capacity reserve available is 6 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 - Cancellation of the Forecast Lack Of Reserve Level 2 (LOR2) in the SA Region on 01/07/2025
The Forecast LOR2 condition in the SA region advised in AEMO Electricity Market Notice No. 127728 is cancelled at 0900 hrs 24/06/2025.
AEMO Operations
STPASA - Update of the Forecast Lack Of Reserve Level 2 (LOR2) in the SA Region on 30/06/2025
The Forecast LOR2 condition in the SA region advised in AEMO Electricity Market Notice No. 127754 has been updated at 0900 hrs 24/06/2025 to the following:
1. From 0730 hrs to 0930 hrs 30/06/2025.
The forecast capacity reserve requirement is 200 MW.
The minimum capacity reserve available is 33 MW.
2. From 1700 hrs to 2300 hrs 30/06/2025.
The forecast capacity reserve requirement is 200 MW.
The minimum capacity reserve available is 0 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 - Cancellation of the Forecast Lack Of Reserve Level 3 (LOR3) in the SA Region on 30/06/2025
The Forecast LOR3 condition in the SA region advised in AEMO Electricity Market Notice No. 127753 is cancelled at 0900 hrs on 24/06/2025.
No LOR3 condition is currently forecast in the STPASA period.
AEMO Operations
Reclassification of a Non-Credible Contingency Event: Palmerston - Hadspen 3 & 4 110kV line and line in TAS1 due to Lightning.
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: TAS1
Lines: Palmerston - Hadspen 3 & 4 110kV and
Duration: 24/06/2025 09:15 until further notice
Constraint set(s) invoked:
T-HAPM_110_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
Reclassification of a Non-Credible Contingency Event: Sheffield - George Town 1 & 2 220kV line and line in TAS1 due to Lightning.
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: TAS1
Lines: Sheffield - George Town 1 & 2 220kV and
Duration: 24/06/2025 08:42 until further notice
Constraint set(s) invoked:
T-GTSH_N-2 Constraint set contains the following interconnector(s) on the left hand side:
T-V-MNSP1
Auto-generated on behalf of Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event: Norwood - Scottsdale 1 110kV line and Norwood-Derby-Scottsdale 110kV line in TAS1 due to Lightning.
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: TAS1
Lines: Norwood - Scottsdale 1 110kV and Norwood-Derby-Scottsdale 110kV
Duration: 24/06/2025 08:20 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations