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116572RECLASSIFY CONTINGENCY10/05/2024 10:13:53 AM
Reclassification of non-credible contingency event due to existence of widespread abnormal condition/s - NEM 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 Severe Space Weather Watch in the NEM regions.
AEMO has therefore reclassified the occurrence of a non-credible contingency event involving multiple plant due to these abnormal conditions as credible.
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 Space Weather Watch in the NEM regions.
AEMO has therefore reclassified the occurrence of a non-credible contingency event involving multiple plant due to these abnormal conditions as credible.
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
116557RECLASSIFY CONTINGENCY09/05/2024 01:58:22 PM
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event: Ross 275 kV SVC and Ross 275/132 kV No. 4 transformer - Qld region.
AEMO ELECTRICITY MARKET NOTICE.
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event. AEMO considers the simultaneous trip of the following elements to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: Qld
Elements: Ross 275 kV SVC and Ross 275/132 kV No. 4 transformer
Duration: 1400 hrs 09/05/2024 until further notice
Constraint set(s) invoked:
Nil
Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event. AEMO considers the simultaneous trip of the following elements to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: Qld
Elements: Ross 275 kV SVC and Ross 275/132 kV No. 4 transformer
Duration: 1400 hrs 09/05/2024 until further notice
Constraint set(s) invoked:
Nil
Manager NEM Real Time Operations
116551SETTLEMENTS RESIDUE08/05/2024 08:30:22 PM
[EventId:202405082030_NRM_NSW1_VIC1_stopped] NEGRES CONSTRAINT NRM_NSW1_VIC1 ceased operating from 08 May 2024 20:30
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 2030 hrs on 8 May 2024
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 8 May 2024.
Refer to market notice: 116542
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the NSW to VIC directional interconnector.
The negative residue constraint NRM_NSW1_VIC1 ceased operating at 2030 hrs on 8 May 2024.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 2030 hrs on 8 May 2024
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 8 May 2024.
Refer to market notice: 116542
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the NSW to VIC directional interconnector.
The negative residue constraint NRM_NSW1_VIC1 ceased operating at 2030 hrs on 8 May 2024.
This is an AEMO autogenerated Market Notice.
116543INTER-REGIONAL TRANSFER08/05/2024 03:50:23 PM
Inter-regional transfer limit variation - Blyth West to Munno Para 275 kV line - SA region - 08/05/2024
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Blyth West to Munno Para 275 kV line - SA region - 08/05/2024
At 1536 hrs 08/05/2024 there was an unplanned outage of Blyth West to Munno Para 275 kV line.
The following constraint set(s) invoked at 1545 hrs 08/05/2024
S-X_BGBW+BWMP
This constraint set(s) contains equations with the following interconnectors on the LHS.
V-S-MNSP1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Blyth West to Munno Para 275 kV line - SA region - 08/05/2024
At 1536 hrs 08/05/2024 there was an unplanned outage of Blyth West to Munno Para 275 kV line.
The following constraint set(s) invoked at 1545 hrs 08/05/2024
S-X_BGBW+BWMP
This constraint set(s) contains equations with the following interconnectors on the LHS.
V-S-MNSP1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
116542SETTLEMENTS RESIDUE08/05/2024 03:30:23 PM
[EventId:202405081530_NRM_NSW1_VIC1_started] NEGRES CONSTRAINT NRM_NSW1_VIC1 started operating from 08 May 2024 15:30
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1530 hrs on 8 May 2024
ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 8 May 2024.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the NSW to VIC directional interconnector.
The negative residue constraint set NRM_NSW1_VIC1 commenced operating from 1530 hrs on 8 May 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 1530 hrs on 8 May 2024
ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 8 May 2024.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the NSW to VIC directional interconnector.
The negative residue constraint set NRM_NSW1_VIC1 commenced operating from 1530 hrs on 8 May 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.
116525INTER-REGIONAL TRANSFER08/05/2024 12:11:09 PM
Inter-regional transfer limit variation - Tamworth No. 1 330 kV Bus - NSW region - 08/05/2024
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Tamworth No. 1 330 kV Bus - NSW region - 08/05/2024
A planned outage of Tamworth No. 1 330 kV Bus in the NSW region was scheduled from 1200 hrs 08/05/2024 to 1800 hrs 10/05/2024.
The outage has been cancelled at 1154 hrs 08/05/2024
Constraint set(s) revoked: N-TW_330_BUS1, N-LDTW_84
This constraint set(s) contains equations with the following interconnectors on the LHS.
NSW1-QLD1
N-Q-MNSP1
T-V-MNSP1
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Tamworth No. 1 330 kV Bus - NSW region - 08/05/2024
A planned outage of Tamworth No. 1 330 kV Bus in the NSW region was scheduled from 1200 hrs 08/05/2024 to 1800 hrs 10/05/2024.
The outage has been cancelled at 1154 hrs 08/05/2024
Constraint set(s) revoked: N-TW_330_BUS1, N-LDTW_84
This constraint set(s) contains equations with the following interconnectors on the LHS.
NSW1-QLD1
N-Q-MNSP1
T-V-MNSP1
Manager NEM Real Time Operations
116524SETTLEMENTS RESIDUE08/05/2024 08:30:23 AM
[EventId:202405080830_NRM_NSW1_VIC1_stopped] NEGRES CONSTRAINT NRM_NSW1_VIC1 ceased operating from 08 May 2024 08:30
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 0830 hrs on 8 May 2024
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 8 May 2024.
Refer to market notice: 116521
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the NSW to VIC directional interconnector.
The negative residue constraint NRM_NSW1_VIC1 ceased operating at 0830 hrs on 8 May 2024.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 0830 hrs on 8 May 2024
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 8 May 2024.
Refer to market notice: 116521
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the NSW to VIC directional interconnector.
The negative residue constraint NRM_NSW1_VIC1 ceased operating at 0830 hrs on 8 May 2024.
This is an AEMO autogenerated Market Notice.
116521SETTLEMENTS RESIDUE08/05/2024 06:35:22 AM
[EventId:202405080635_NRM_NSW1_VIC1_started] NEGRES CONSTRAINT NRM_NSW1_VIC1 started operating from 08 May 2024 06:35
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 0635 hrs on 8 May 2024
ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 8 May 2024.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the NSW to VIC directional interconnector.
The negative residue constraint set NRM_NSW1_VIC1 commenced operating from 0635 hrs on 8 May 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 0635 hrs on 8 May 2024
ACTUAL NEGATIVE SETTLEMENT RESIDUES - NSW to VIC - 8 May 2024.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the NSW to VIC directional interconnector.
The negative residue constraint set NRM_NSW1_VIC1 commenced operating from 0635 hrs on 8 May 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.
116518RECLASSIFY CONTINGENCY08/05/2024 01:09:54 AM
Cancellation of a Non-Credible Contingency Event: Collinsville - Stoney Creek 7306 132KV LINE line and Collinsville - Newlands 7121 132KV LINE line in QLD1 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: QLD1
Lines: Collinsville - Stoney Creek 7306 132KV LINE and Collinsville - Newlands 7121 132KV LINE
Cancellation time: 08/05/2024 01:09
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 116517
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: QLD1
Lines: Collinsville - Stoney Creek 7306 132KV LINE and Collinsville - Newlands 7121 132KV LINE
Cancellation time: 08/05/2024 01:09
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 116517
Auto-generated on behalf of Manager NEM Real Time Operations