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128165MARKET INTERVENTION18/07/2025 02:10:33 PM
Update 2 - Foreseeable AEMO intervention in SA region
AEMO ELECTRICITY MARKET NOTICE
Update 2 - Foreseeable AEMO intervention in SA region
Refer AEMO Electricity Market Notice 128163
AEMO has identified a foreseeable circumstance that may require an AEMO intervention event in the SA region from 2300 hrs 18/07/2025.
The foreseeable circumstance requiring the need for intervention is Voltage.
AEMO estimates that, in the absence of sufficient market response by 1430 hrs 18/07/2025, AEMO may need to intervene by issuing a direction.
Manager NEM Real Time Operations
Update 2 - Foreseeable AEMO intervention in SA region
Refer AEMO Electricity Market Notice 128163
AEMO has identified a foreseeable circumstance that may require an AEMO intervention event in the SA region from 2300 hrs 18/07/2025.
The foreseeable circumstance requiring the need for intervention is Voltage.
AEMO estimates that, in the absence of sufficient market response by 1430 hrs 18/07/2025, AEMO may need to intervene by issuing a direction.
Manager NEM Real Time Operations
128163MARKET INTERVENTION18/07/2025 12:11:23 PM
Update - Foreseeable AEMO intervention in SA region
AEMO ELECTRICITY MARKET NOTICE
Update - Foreseeable AEMO intervention in SA region
Refer AEMO Electricity Market Notice 128154
AEMO has identified a foreseeable circumstance that may require an AEMO intervention event in the SA region from 2200 hrs 18/07/2025.
The foreseeable circumstance requiring the need for intervention is Voltage.
AEMO estimates that, in the absence of sufficient market response by 1600 hrs 18/07/2025, AEMO may need to intervene by issuing a direction.
Manager NEM Real Time Operations
Update - Foreseeable AEMO intervention in SA region
Refer AEMO Electricity Market Notice 128154
AEMO has identified a foreseeable circumstance that may require an AEMO intervention event in the SA region from 2200 hrs 18/07/2025.
The foreseeable circumstance requiring the need for intervention is Voltage.
AEMO estimates that, in the absence of sufficient market response by 1600 hrs 18/07/2025, AEMO may need to intervene by issuing a direction.
Manager NEM Real Time Operations
128162RECLASSIFY CONTINGENCY18/07/2025 10:16:34 AM
Update - Non-credible contingency event - QLD region - 18/07/2025
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - QLD region - 18/07/2025
Refer AEMO Electricity Market Notice 128160
The cause of this non credible contingency event is not known at this stage.
AEMO is not satisfied that this non credible event is unlikely to re-occur.
AEMO has therefore reclassified this event as a credible contingency event until further notice.
Region: QLD
Elements: H11_Nebo 275/132 kV No.1 Transformer and the H11_Nebo 275 kV SVC
Duration: 0958 hrs 18/07/2025 until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations
Update - Non-credible contingency event - QLD region - 18/07/2025
Refer AEMO Electricity Market Notice 128160
The cause of this non credible contingency event is not known at this stage.
AEMO is not satisfied that this non credible event is unlikely to re-occur.
AEMO has therefore reclassified this event as a credible contingency event until further notice.
Region: QLD
Elements: H11_Nebo 275/132 kV No.1 Transformer and the H11_Nebo 275 kV SVC
Duration: 0958 hrs 18/07/2025 until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations
128158RECLASSIFY CONTINGENCY18/07/2025 03:44:50 AM
Cancellation of a Non-Credible Contingency Event: Armidale - Dumaresq 8C 330kV line and Armidale - Sapphire WF 8E 330kV line in NSW1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: NSW1
Lines: Armidale - Dumaresq 8C 330kV and Armidale - Sapphire WF 8E 330kV
Cancellation time: 18/07/2025 03:44
Constraint set(s) revoked:
N-ARDM_ARSR_1PH_N-2 Constraint set contains the following interconnector(s) on the left hand side:
N-Q-MNSP1
NSW1-QLD1
Refer AEMO Electricity Market Notice 128155
Auto-generated on behalf of Manager NEM Real Time Operations
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: NSW1
Lines: Armidale - Dumaresq 8C 330kV and Armidale - Sapphire WF 8E 330kV
Cancellation time: 18/07/2025 03:44
Constraint set(s) revoked:
N-ARDM_ARSR_1PH_N-2 Constraint set contains the following interconnector(s) on the left hand side:
N-Q-MNSP1
NSW1-QLD1
Refer AEMO Electricity Market Notice 128155
Auto-generated on behalf of Manager NEM Real Time Operations
128157RECLASSIFY CONTINGENCY18/07/2025 02:04:50 AM
Cancellation of a Non-Credible Contingency Event: Bayswater - Mt Piper No.5A3 500kV line and Wollar - Mt Piper No.5A5 500kV line in NSW1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Cancellation time: 18/07/2025 02:04
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 128156
Auto-generated on behalf of Manager NEM Real Time Operations
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Cancellation time: 18/07/2025 02:04
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 128156
Auto-generated on behalf of Manager NEM Real Time Operations
128156RECLASSIFY CONTINGENCY18/07/2025 12:59:05 AM
Reclassification of a Non-Credible Contingency Event: Bayswater - Mt Piper No.5A3 500kV line and Wollar - Mt Piper No.5A5 500kV line in NSW1 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: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Duration: 18/07/2025 00:59 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
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: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Duration: 18/07/2025 00:59 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
128155RECLASSIFY CONTINGENCY17/07/2025 09:41:05 PM
Reclassification of a Non-Credible Contingency Event: Armidale - Dumaresq 8C 330kV line and Armidale - Sapphire WF 8E 330kV line in NSW1 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: NSW1
Lines: Armidale - Dumaresq 8C 330kV and Armidale - Sapphire WF 8E 330kV
Duration: 17/07/2025 21:41 until further notice
Constraint set(s) invoked:
N-ARDM_ARSR_1PH_N-2 Constraint set contains the following interconnector(s) on the left hand side:
N-Q-MNSP1
NSW1-QLD1
Auto-generated on behalf of Manager NEM Real Time Operations
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: NSW1
Lines: Armidale - Dumaresq 8C 330kV and Armidale - Sapphire WF 8E 330kV
Duration: 17/07/2025 21:41 until further notice
Constraint set(s) invoked:
N-ARDM_ARSR_1PH_N-2 Constraint set contains the following interconnector(s) on the left hand side:
N-Q-MNSP1
NSW1-QLD1
Auto-generated on behalf of Manager NEM Real Time Operations
128154MARKET INTERVENTION17/07/2025 06:42:08 PM
Foreseeable AEMO intervention under clause 4.8.5A (a) of the NER in SA region
AEMO ELECTRICITY MARKET NOTICE
Foreseeable AEMO intervention under clause 4.8.5A (a) of the NER in SA region
AEMO has identified a foreseeable circumstance that may require an AEMO intervention event in the SA region from 2200 hrs 18/07/2025.
The foreseeable circumstance requiring the need for intervention is Voltage.
Manager NEM Real Time Operations
Foreseeable AEMO intervention under clause 4.8.5A (a) of the NER in SA region
AEMO has identified a foreseeable circumstance that may require an AEMO intervention event in the SA region from 2200 hrs 18/07/2025.
The foreseeable circumstance requiring the need for intervention is Voltage.
Manager NEM Real Time Operations
128153RECLASSIFY CONTINGENCY17/07/2025 05:07:13 PM
Cancellation - Reclassification of a non-credible contingency event to credible event - SA region - 15/08/2023
AEMO ELECTRICITY MARKET NOTICE.
Cancellation - Reclassification of a non-credible contingency event to credible event - SA region - 15/08/2023
Refer AEMO ELECTRICITY MARKET NOTICES 109321,109323
Based on advise received from TNSP, AEMO is satisfied that this non credible event is unlikely to re-occur.
AEMO therefore cancels this reclassification as a credible contingency event.
Region: SA
Elements: Blyth West - Munno Para 275 kV Line tripping at Blyth West end only
Cancelled: 17/07/2025 1630 hrs
Constraint(s) invoked: Nil
Manager NEM Real Time Operations
Cancellation - Reclassification of a non-credible contingency event to credible event - SA region - 15/08/2023
Refer AEMO ELECTRICITY MARKET NOTICES 109321,109323
Based on advise received from TNSP, AEMO is satisfied that this non credible event is unlikely to re-occur.
AEMO therefore cancels this reclassification as a credible contingency event.
Region: SA
Elements: Blyth West - Munno Para 275 kV Line tripping at Blyth West end only
Cancelled: 17/07/2025 1630 hrs
Constraint(s) invoked: Nil
Manager NEM Real Time Operations