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Reclassification of a Non-Credible Contingency Event: Bannaby - Mt Piper 5A6 500kV line and Bannaby - Mt Piper 5A7 500kV line in NSW1 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: NSW1
Lines: Bannaby - Mt Piper 5A6 500kV and Bannaby - Mt Piper 5A7 500kV
Duration: 13/07/2024 15:41 until further notice
Constraint set(s) invoked:
N-5A6+5A7_N-2 Constraint set contains the following interconnector(s) on the left hand side:
N-Q-MNSP1
NSW1-QLD1
VIC1-NSW1
Auto-generated on behalf of Manager NEM Real Time Operations
Cancellation - AEMO Intervention Event - SA region 05/07/2024
Cancellation - AEMO Intervention Event - SA region 05/07/2024
Refer to Market Notice 117295
The AEMO Intervention Event and all associated directions are cancelled from 1400 hrs on 07/07/2024.
Manager NEM Real Time Operations
Cancellation: Direction issued to: AGL SA Generation Pty Limited - TORRB4 TORRENS ISLAN
Cancellation: Direction issued to: AGL SA Generation Pty Limited - TORRB4 TORRENS ISLAN
Refer to Market Notice 117310
Direction is cancelled from: 1400 hrs 07/07/2024
Manager NEM Real Time Operations
Update - Direction - SA Region - 05/07/2024
Update Direction - AGL SA Generation Pty Limited - TORRB4 TORRENS ISLAN
Refer AEMO Electricity Market Notice 117303
The TORRB4 TORRENS ISLAN direction is now expected to stay in place until 1400 hrs 07/07/2024.
The direction update is issued at 1300 hrs 07/07/2024.
Manager NEM Real Time Operations
Cancellation: Reclassification of non-credible contingency event due to existence of widespread abnormal conditions - SA region.
AEMO considers the occurrence of a non-credible contingency event due to the widespread abnormal conditions advised in AEMO Electricity Market Notice 117306 is no longer reasonably possible and accordingly its classification has reverted to non-credible.
Cancellation time: 2300 hrs 06/07/2024.
Constraint set revoked: I-VS_250
Manager NEM Real Time Operations
Reclassification of non-credible contingency event due to existence of widespread abnormal conditions - 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 2120 hrs 06/07/2024.
Constraint set invoked: I-VS_250
Duration: 2120 hrs 06/07/2024 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
Cancellation: Direction issued to: AGL SA Generation Pty Limited - TORRB3 TORRENS ISLAN
Cancellation: Direction issued to: AGL SA Generation Pty Limited - TORRB3 TORRENS ISLAN
Refer to Market Notice 117293
Direction is cancelled from: 1600 hrs 06/07/2024
Manager NEM Real Time Operations
Update - Direction - SA Region - 05/07/2024
Update - Direction - SA Region - 05/07/2024
Refer Market Notice 117295
The AEMO intervention event that commenced from interval ending 1705 hrs on 05/07/2024 is continuing.
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
Update - Direction - SA region 05/07/2024
Update - Direction - SA region 05/07/2024
Refer to Market Notice 117294
In accordance with section 116 of the National Electricity Law, AEMO is issuing an updated 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).
Updated - Direction issued to: AGL SA Generation Pty Limited - TORRB4 TORRENS ISLAN at 1700 hrs 06/07/2024
Type of resource: generating unit
Required actions: remain synchronised and follow dispatch targets at 0400 hrs 07/07/2024
Services provided: Voltage Control
Circumstances necessitating the Direction: Voltage
Circumstances necessitating the Direction additional detail: intervention is required to maintain the power system in a secure operating state
Expected duration: 1430 hrs 07/07/2024
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