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117391RECLASSIFY CONTINGENCY20/07/2024 04:08:54 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: 1600 hrs 20/07/2024
Constraint set(s) revoked: Nil
Refer AEMO Electricity Market Notice 117358.
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: 1600 hrs 20/07/2024
Constraint set(s) revoked: Nil
Refer AEMO Electricity Market Notice 117358.
Manager NEM Real Time Operations
117390RECLASSIFY CONTINGENCY20/07/2024 04:07:20 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: 1600 hrs 20/07/2024
Constraint set(s) revoked: Nil
Refer AEMO Electricity Market Notice 117363.
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: 1600 hrs 20/07/2024
Constraint set(s) revoked: Nil
Refer AEMO Electricity Market Notice 117363.
Manager NEM Real Time Operations
117389INTER-REGIONAL TRANSFER20/07/2024 02:52:46 PM
Inter-regional transfer limit variation - Armidale Coffs Harbour 96C 132kV LINE - NSW region - 20/07/2024
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Armidale Coffs Harbour 96C 132kV LINE - NSW region - 20/07/2024
At 1422 hrs 20/07/2024 there was an unplanned outage of Armidale Coffs Harbour 96C 132kV LINE.
The following constraint set(s) invoked at 1430 hrs 20/07/2024
N-ARCH_96C
This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q-MNSP1,NSW1-QLD1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Armidale Coffs Harbour 96C 132kV LINE - NSW region - 20/07/2024
At 1422 hrs 20/07/2024 there was an unplanned outage of Armidale Coffs Harbour 96C 132kV LINE.
The following constraint set(s) invoked at 1430 hrs 20/07/2024
N-ARCH_96C
This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q-MNSP1,NSW1-QLD1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
117388SETTLEMENTS RESIDUE20/07/2024 02:30:21 PM
[EventId:202407201430_NRM_VIC1_NSW1_stopped] NEGRES CONSTRAINT NRM_VIC1_NSW1 ceased operating from 20 July 2024 14:30
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1430 hrs on 20 July 2024
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to NSW - 20 July 2024.
Refer to market notice: 117382
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the VIC to NSW directional interconnector.
The negative residue constraint NRM_VIC1_NSW1 ceased operating at 1430 hrs on 20 July 2024.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1430 hrs on 20 July 2024
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to NSW - 20 July 2024.
Refer to market notice: 117382
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the VIC to NSW directional interconnector.
The negative residue constraint NRM_VIC1_NSW1 ceased operating at 1430 hrs on 20 July 2024.
This is an AEMO autogenerated Market Notice.
117382SETTLEMENTS RESIDUE20/07/2024 01:30:31 PM
[EventId:202407201330_NRM_VIC1_NSW1_started] NEGRES CONSTRAINT NRM_VIC1_NSW1 started operating from 20 July 2024 13:30
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1330 hrs on 20 July 2024
ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to NSW - 20 July 2024.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the VIC to NSW directional interconnector.
The negative residue constraint set NRM_VIC1_NSW1 commenced operating from 1330 hrs on 20 July 2024.
This constraint set contains an equation with the following interconnectors on the LHS:
VIC1-NSW1
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 1330 hrs on 20 July 2024
ACTUAL NEGATIVE SETTLEMENT RESIDUES - VIC to NSW - 20 July 2024.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the VIC to NSW directional interconnector.
The negative residue constraint set NRM_VIC1_NSW1 commenced operating from 1330 hrs on 20 July 2024.
This constraint set contains an equation with the following interconnectors on the LHS:
VIC1-NSW1
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
117381INTER-REGIONAL TRANSFER20/07/2024 01:03:16 PM
Inter-regional transfer limit variation - Mitchell Singleton 95X 132kV LINE- NSW region - 20/07/2024
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Mitchell Singleton 95X 132kV LINE- NSW region - 20/07/2024
At 1117 hrs 20/07/2024 there was an unplanned outage of Mitchell Singleton 95X 132kV LINE.
The following constraint set(s) invoked at 1250 hrs 20/07/2024
N-NIL_RBKU_CLOSED
N-LDTM_82_CL
This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q-MNSP1,NSW1-QLD1,VIC1-NSW1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Mitchell Singleton 95X 132kV LINE- NSW region - 20/07/2024
At 1117 hrs 20/07/2024 there was an unplanned outage of Mitchell Singleton 95X 132kV LINE.
The following constraint set(s) invoked at 1250 hrs 20/07/2024
N-NIL_RBKU_CLOSED
N-LDTM_82_CL
This constraint set(s) contains equations with the following interconnectors on the LHS.
N-Q-MNSP1,NSW1-QLD1,VIC1-NSW1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
117375INTER-REGIONAL TRANSFER19/07/2024 07:03:12 PM
Cancellation Inter-Regional Transfer limit variation - Directlink control unavailable (NSW Region).
AEMO ELECTRICITY MARKET NOTICE
Cancellation Inter-Regional Transfer limit variation - Directlink control unavailable (NSW Region).
Refer AEMO Electricity Market Notice 117372
AEMO has been notified that the controls to vary Directlink output are now available.
Constraint set I-CTRL_ISSUE_TE revoked at 1835 hrs.
Manager NEM Real Time Operations
Cancellation Inter-Regional Transfer limit variation - Directlink control unavailable (NSW Region).
Refer AEMO Electricity Market Notice 117372
AEMO has been notified that the controls to vary Directlink output are now available.
Constraint set I-CTRL_ISSUE_TE revoked at 1835 hrs.
Manager NEM Real Time Operations
117374INTER-REGIONAL TRANSFER19/07/2024 06:01:53 PM
Inter-regional transfer limit variation - Heywood interconnector - SA and Vic regions - 19/07/2024
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Heywood interconnector - SA and Vic regions- 19/07/2024
Refer to reclassification Market notice 117373
The following constraint set(s) invoked at 1740 hrs 19/07/2024
I-SV_250 , I-VS_250
This constraint set(s) contains equations with the following interconnectors on the LHS.
V-SA
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Heywood interconnector - SA and Vic regions- 19/07/2024
Refer to reclassification Market notice 117373
The following constraint set(s) invoked at 1740 hrs 19/07/2024
I-SV_250 , I-VS_250
This constraint set(s) contains equations with the following interconnectors on the LHS.
V-SA
Manager NEM Real Time Operations
117373RECLASSIFY CONTINGENCY19/07/2024 05:36:20 PM
Reclassification of non-credible contingency event due to existence of widespread abnormal conditions - South Australia and Victoria regions.
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 widespread severe weather in the South Australia and Victoria regions.
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(s) to maintain power system security at 1740 hrs 19/07/2024.
Constraint set(s) invoked:
I-SV_250
I-VS_250
Duration: 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 widespread severe weather in the South Australia and Victoria regions.
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(s) to maintain power system security at 1740 hrs 19/07/2024.
Constraint set(s) invoked:
I-SV_250
I-VS_250
Duration: 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