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128172RECLASSIFY CONTINGENCY19/07/2025 05:24:50 AM
Cancellation of a Non-Credible Contingency Event: Gordon - Chapel St No 1 220kV line and Gordon - Chapel St No 2 220kV line in TAS1 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: TAS1
Lines: Gordon - Chapel St No 1 220kV and Gordon - Chapel St No 2 220kV
Cancellation time: 19/07/2025 05:24
Constraint set(s) revoked:
F-T-CSGO Constraint set contains the following interconnector(s) on the left hand side:
T-V-MNSP1
T-CSGO_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NONE
Refer AEMO Electricity Market Notice 128170
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: TAS1
Lines: Gordon - Chapel St No 1 220kV and Gordon - Chapel St No 2 220kV
Cancellation time: 19/07/2025 05:24
Constraint set(s) revoked:
F-T-CSGO Constraint set contains the following interconnector(s) on the left hand side:
T-V-MNSP1
T-CSGO_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NONE
Refer AEMO Electricity Market Notice 128170
Auto-generated on behalf of Manager NEM Real Time Operations
128171RECLASSIFY CONTINGENCY19/07/2025 04:34:50 AM
Cancellation of a Non-Credible Contingency Event: Burnie - Port Latta - Smithton 1 110kV line and Burnie - Port Latta - Smithton 2 110kV line in TAS1 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: TAS1
Lines: Burnie - Port Latta - Smithton 1 110kV and Burnie - Port Latta - Smithton 2 110kV
Cancellation time: 19/07/2025 04:34
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 128169
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: TAS1
Lines: Burnie - Port Latta - Smithton 1 110kV and Burnie - Port Latta - Smithton 2 110kV
Cancellation time: 19/07/2025 04:34
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 128169
Auto-generated on behalf of Manager NEM Real Time Operations
128170RECLASSIFY CONTINGENCY19/07/2025 04:23:11 AM
Reclassification of a Non-Credible Contingency Event: Gordon - Chapel St No 1 220kV line and Gordon - Chapel St No 2 220kV line in TAS1 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: TAS1
Lines: Gordon - Chapel St No 1 220kV and Gordon - Chapel St No 2 220kV
Duration: 19/07/2025 04:23 until further notice
Constraint set(s) invoked:
F-T-CSGO Constraint set contains the following interconnector(s) on the left hand side:
T-V-MNSP1
T-CSGO_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 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: Gordon - Chapel St No 1 220kV and Gordon - Chapel St No 2 220kV
Duration: 19/07/2025 04:23 until further notice
Constraint set(s) invoked:
F-T-CSGO Constraint set contains the following interconnector(s) on the left hand side:
T-V-MNSP1
T-CSGO_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
128169RECLASSIFY CONTINGENCY19/07/2025 03:33:55 AM
Reclassification of a Non-Credible Contingency Event: Burnie - Port Latta - Smithton 1 110kV line and Burnie - Port Latta - Smithton 2 110kV line in TAS1 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: TAS1
Lines: Burnie - Port Latta - Smithton 1 110kV and Burnie - Port Latta - Smithton 2 110kV
Duration: 19/07/2025 03:33 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: TAS1
Lines: Burnie - Port Latta - Smithton 1 110kV and Burnie - Port Latta - Smithton 2 110kV
Duration: 19/07/2025 03:33 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
128167MARKET INTERVENTION18/07/2025 02:32:25 PM
Direction - SA region 18/07/2025
AEMO ELECTRICITY MARKET NOTICE
Direction - SA region 18/07/2025
In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
The issue of the direction commences an AEMO intervention event. AEMO declares all trading intervals during the event to be intervention trading intervals, commencing from the interval ending 1435 hrs on 18/07/2025.
Intervention pricing does not apply to this AEMO intervention event.
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.
Manager NEM Real Time Operations
Direction - SA region 18/07/2025
In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
The issue of the direction commences an AEMO intervention event. AEMO declares all trading intervals during the event to be intervention trading intervals, commencing from the interval ending 1435 hrs on 18/07/2025.
Intervention pricing does not apply to this AEMO intervention event.
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.
Manager NEM Real Time Operations
128166MARKET INTERVENTION18/07/2025 02:32:45 PM
Direction - SA region to AGL SA Generation Pty Limited - TORRB2 TORRENS ISLAN
AEMO ELECTRICITY MARKET NOTICE
Direction - SA region to AGL SA Generation Pty Limited - TORRB2 TORRENS ISLAN
Refer to Market Notice 128167
In accordance with section 116 of the National Electricity Law, AEMO is issuing a direction to AGL SA Generation Pty Limited. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
Direction issued to: AGL SA Generation Pty Limited - TORRB2 TORRENS ISLAN at 1430 hrs 18/07/2025
Type of resource: generating unit
Required actions: Remain synchronised and follow dispatch targets at 2300 hrs 18/07/2025
Services provided: Voltage Control
Circumstances necessitating the Direction: Voltage
Circumstances necessitating the Direction additional detail: The synchronous generating units currently expected to be synchronised in SA will be inadequate to maintain sufficient Voltage Control in SA. Intervention is required to maintain the power system in a secure operating state
Expected duration: 1430 hrs 19/07/2025.
AGL SA Generation Pty Limited does not incur any civil monetary liability for a relevant action taken in accordance with this direction unless the action is taken in bad faith.
Manager NEM Real Time Operations
Direction - SA region to AGL SA Generation Pty Limited - TORRB2 TORRENS ISLAN
Refer to Market Notice 128167
In accordance with section 116 of the National Electricity Law, AEMO is issuing a direction to AGL SA Generation Pty Limited. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
Direction issued to: AGL SA Generation Pty Limited - TORRB2 TORRENS ISLAN at 1430 hrs 18/07/2025
Type of resource: generating unit
Required actions: Remain synchronised and follow dispatch targets at 2300 hrs 18/07/2025
Services provided: Voltage Control
Circumstances necessitating the Direction: Voltage
Circumstances necessitating the Direction additional detail: The synchronous generating units currently expected to be synchronised in SA will be inadequate to maintain sufficient Voltage Control in SA. Intervention is required to maintain the power system in a secure operating state
Expected duration: 1430 hrs 19/07/2025.
AGL SA Generation Pty Limited does not incur any civil monetary liability for a relevant action taken in accordance with this direction unless the action is taken in bad faith.
Manager NEM Real Time Operations
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