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127506RECLASSIFY CONTINGENCY11/06/2025 09:23:01 PM
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: 11/06/2025 21:22 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: 11/06/2025 21:22 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
127505RESERVE NOTICE11/06/2025 07:43:29 PM
Cancellation of the Actual Lack Of Reserve Level 1 (LOR1) condition in the QLD Region on 11/06/2025
AEMO ELECTRICITY MARKET NOTICE
The Actual LOR1 condition in the QLD region advised in AEMO Electricity Market Notice No. 127504 is cancelled at 1945 hrs 11/06/2025.
Manager NEM Real Time Operations
The Actual LOR1 condition in the QLD region advised in AEMO Electricity Market Notice No. 127504 is cancelled at 1945 hrs 11/06/2025.
Manager NEM Real Time Operations
127504RESERVE NOTICE11/06/2025 07:12:10 PM
Actual Lack Of Reserve Level 1 (LOR1) in the QLD region - 11/06/2025
AEMO ELECTRICITY MARKET NOTICE
Actual Lack Of Reserve Level 1 (LOR1) in the QLD region - 11/06/2025
An Actual LOR1 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the QLD region from 1900 hrs.
The Actual LOR1 condition is forecast to exist until 1930 hrs
The capacity reserve requirement is 730 MW
The minimum capacity reserve available is 693 MW
Manager NEM Real Time Operations
Actual Lack Of Reserve Level 1 (LOR1) in the QLD region - 11/06/2025
An Actual LOR1 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the QLD region from 1900 hrs.
The Actual LOR1 condition is forecast to exist until 1930 hrs
The capacity reserve requirement is 730 MW
The minimum capacity reserve available is 693 MW
Manager NEM Real Time Operations
127473RECLASSIFY CONTINGENCY07/06/2025 11:47:43 PM
Cancellation of the reclassification of a Non-Credible Contingency Event: Para-Templers West and Magill-Torrens Island A 275kV lines in SA due to severe weather warning.
AEMO ELECTRICITY MARKET NOTICE.
Cancellation of the 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 is no longer reasonably possible. There is no longer any severe weather warning in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: SA
Lines: Para-Templers West and Magill-Torrens Island A 275kV lines
Cancellation time: 2345 hrs 7/06/2025
Constraint set(s) revoked: Nil
Refer AEMO Electricity Market Notice 127419
Manager NEM Real Time Operations
Cancellation of the 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 is no longer reasonably possible. There is no longer any severe weather warning in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: SA
Lines: Para-Templers West and Magill-Torrens Island A 275kV lines
Cancellation time: 2345 hrs 7/06/2025
Constraint set(s) revoked: Nil
Refer AEMO Electricity Market Notice 127419
Manager NEM Real Time Operations
127472RECLASSIFY CONTINGENCY07/06/2025 11:47:22 PM
Cancellation of the 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 .
AEMO ELECTRICITY MARKET NOTICE.
Cancellation of the 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 is no longer reasonably possible. There is no longer any severe weather warning in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: SA
Lines: Brinkworth-Davenport, Brinkworth-Templers West and Para-Templers West 275kV lines
Cancellation time: 2345 hrs 7/06/2025
Constraint set(s) revoked: Nil
Refer AEMO Electricity Market Notice 127418
Manager NEM Real Time Operations
Cancellation of the 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 is no longer reasonably possible. There is no longer any severe weather warning in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: SA
Lines: Brinkworth-Davenport, Brinkworth-Templers West and Para-Templers West 275kV lines
Cancellation time: 2345 hrs 7/06/2025
Constraint set(s) revoked: Nil
Refer AEMO Electricity Market Notice 127418
Manager NEM Real Time Operations
127471RECLASSIFY CONTINGENCY07/06/2025 11:47:12 PM
Cancellation: Reclassification of non-credible contingency event due to existence of widespread abnormal conditions - SA region.
AEMO ELECTRICITY MARKET NOTICE.
AEMO considers the occurrence of a non-credible contingency event due to the widespread abnormal conditions advised in AEMO Electricity Market Notice 127450 is no longer reasonably possible and accordingly its classification has reverted to non-credible.
Cancellation time: 2345 hrs 7/06/2025
Constraint set(s) revoked:
I-VS_250
Manager NEM Real Time Operations
AEMO considers the occurrence of a non-credible contingency event due to the widespread abnormal conditions advised in AEMO Electricity Market Notice 127450 is no longer reasonably possible and accordingly its classification has reverted to non-credible.
Cancellation time: 2345 hrs 7/06/2025
Constraint set(s) revoked:
I-VS_250
Manager NEM Real Time Operations
127459SETTLEMENTS RESIDUE07/06/2025 04:00:33 PM
[EventId:202506071600_NRM_SA1_VIC1_stopped] NEGRES CONSTRAINT NRM_SA1_VIC1 ceased operating from 07 June 2025 16:00
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1600 hrs on 7 June 2025
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - SA to VIC - 7 June 2025.
Refer to market notice: 127457
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the SA to VIC directional interconnector.
The negative residue constraint NRM_SA1_VIC1 ceased operating at 1600 hrs on 7 June 2025.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1600 hrs on 7 June 2025
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - SA to VIC - 7 June 2025.
Refer to market notice: 127457
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the SA to VIC directional interconnector.
The negative residue constraint NRM_SA1_VIC1 ceased operating at 1600 hrs on 7 June 2025.
This is an AEMO autogenerated Market Notice.
127457SETTLEMENTS RESIDUE07/06/2025 03:05:29 PM
[EventId:202506071505_NRM_SA1_VIC1_started] NEGRES CONSTRAINT NRM_SA1_VIC1 started operating from 07 June 2025 15:05
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1505 hrs on 7 June 2025
ACTUAL NEGATIVE SETTLEMENT RESIDUES - SA to VIC - 7 June 2025.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the SA to VIC directional interconnector.
The negative residue constraint set NRM_SA1_VIC1 commenced operating from 1505 hrs on 7 June 2025.
This constraint set contains an equation with the following interconnectors on the LHS:
V-S-MNSP1
V-SA
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1505 hrs on 7 June 2025
ACTUAL NEGATIVE SETTLEMENT RESIDUES - SA to VIC - 7 June 2025.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the SA to VIC directional interconnector.
The negative residue constraint set NRM_SA1_VIC1 commenced operating from 1505 hrs on 7 June 2025.
This constraint set contains an equation with the following interconnectors on the LHS:
V-S-MNSP1
V-SA
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
127450RECLASSIFY CONTINGENCY07/06/2025 12:51:59 PM
Reclassification of non-credible contingency event due to existence of widespread abnormal condition/s - SA region.
AEMO ELECTRICITY MARKET NOTICE.
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 1250 hrs 07/06/2025.
Constraint set invoked:
I-VS_250
Duration: 1255 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
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 1250 hrs 07/06/2025.
Constraint set invoked:
I-VS_250
Duration: 1255 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