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90970PRICES SUBJECT TO REVIEW22/09/2021 10:35:19 PM
[EventId:202109222240_review] Prices for interval 22-Sep-2021 22:40 are subject to review
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 2235 hrs on 22 September 2021
PRICES ARE SUBJECT TO REVIEW for dispatch interval 22-Sep-2021 22:40.
AEMO is reviewing these prices in accordance with:
- Clause 3.9.2B of the National Electricity Rules for Manifestly Incorrect Inputs
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 2235 hrs on 22 September 2021
PRICES ARE SUBJECT TO REVIEW for dispatch interval 22-Sep-2021 22:40.
AEMO is reviewing these prices in accordance with:
- Clause 3.9.2B of the National Electricity Rules for Manifestly Incorrect Inputs
This is an AEMO autogenerated Market Notice.
90969PRICES SUBJECT TO REVIEW22/09/2021 10:30:19 PM
[EventId:202109222235_review] Prices for interval 22-Sep-2021 22:35 are subject to review
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 2230 hrs on 22 September 2021
PRICES ARE SUBJECT TO REVIEW for dispatch interval 22-Sep-2021 22:35.
AEMO is reviewing these prices in accordance with:
- Clause 3.9.2B of the National Electricity Rules for Manifestly Incorrect Inputs
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 2230 hrs on 22 September 2021
PRICES ARE SUBJECT TO REVIEW for dispatch interval 22-Sep-2021 22:35.
AEMO is reviewing these prices in accordance with:
- Clause 3.9.2B of the National Electricity Rules for Manifestly Incorrect Inputs
This is an AEMO autogenerated Market Notice.
90968SETTLEMENTS RESIDUE22/09/2021 10:10:23 PM
[EventId:202109222210_NRM_QLD1_NSW1_started] NEGRES CONSTRAINT NRM_QLD1_NSW1 started operating from 22 September 2021 22:10
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 2210 hrs on 22 September 2021
ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 22 September 2021.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the QLD to NSW directional interconnector.
The negative residue constraint set NRM_QLD1_NSW1 commenced operating from 2210 hrs on 22 September 2021.
This constraint set contains an equation with the following interconnectors on the LHS:
N-Q-MNSP1
NSW1-QLD1
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 2210 hrs on 22 September 2021
ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 22 September 2021.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the QLD to NSW directional interconnector.
The negative residue constraint set NRM_QLD1_NSW1 commenced operating from 2210 hrs on 22 September 2021.
This constraint set contains an equation with the following interconnectors on the LHS:
N-Q-MNSP1
NSW1-QLD1
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
90967SETTLEMENTS RESIDUE22/09/2021 08:00:22 PM
[EventId:202109222000_NRM_QLD1_NSW1_stopped] NEGRES CONSTRAINT NRM_QLD1_NSW1 ceased operating from 22 September 2021 20:00
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 2000 hrs on 22 September 2021
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 22 September 2021.
Refer to market notice: 90964
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the QLD to NSW directional interconnector.
The negative residue constraint NRM_QLD1_NSW1 ceased operating at 2000 hrs on 22 September 2021.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 2000 hrs on 22 September 2021
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 22 September 2021.
Refer to market notice: 90964
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the QLD to NSW directional interconnector.
The negative residue constraint NRM_QLD1_NSW1 ceased operating at 2000 hrs on 22 September 2021.
This is an AEMO autogenerated Market Notice.
90966POWER SYSTEM EVENTS22/09/2021 07:44:32 PM
Update - Non-credible contingency event - Torrens Island 66 kV East Bus - SA region - 22/09/2021
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - Torrens Island 66 kV East Bus - SA region - 22/09/2021
At 1740 hrs the Torrens Island 66 kV East bus tripped. The bus was returned to service at 1846 hrs.
The cause of this non-credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.
AEMO will not reclassify this event as a credible contingency event.
Refer AEMO Electricity Market Notice 90963
Manager NEM Real Time Operations
Update - Non-credible contingency event - Torrens Island 66 kV East Bus - SA region - 22/09/2021
At 1740 hrs the Torrens Island 66 kV East bus tripped. The bus was returned to service at 1846 hrs.
The cause of this non-credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.
AEMO will not reclassify this event as a credible contingency event.
Refer AEMO Electricity Market Notice 90963
Manager NEM Real Time Operations
90965RECLASSIFY CONTINGENCY22/09/2021 07:46:25 PM
Cancellation of the Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event - South East SVC1 and SVC2 - SA Region - 22/09/2021
AEMO ELECTRICITY MARKET NOTICE
Cancellation of the Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event - South East SVC1 and SVC2 - SA Region - 22/09/2021
AEMO considers the simultaneous trip of the following elements is no longer reasonably possible. Accordingly, its classification has reverted to a non-credible contingency event.
Region: SA
Elements: The No. 1 and No. 2 275 kV Static Var Compensator (SVC) at South East Substation.
Cancellation time: 22/09/2021 1935
Constraint set(s) revoked:
S-X_SEVC2+PAVC
The constraint sets contain equations with the following interconnector on the LHS:
V-S-MNSP1
V-SA
Refer AEMO Electricity Market Notice 90951
Manager NEM Real Time Operations
Cancellation of the Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event - South East SVC1 and SVC2 - SA Region - 22/09/2021
AEMO considers the simultaneous trip of the following elements is no longer reasonably possible. Accordingly, its classification has reverted to a non-credible contingency event.
Region: SA
Elements: The No. 1 and No. 2 275 kV Static Var Compensator (SVC) at South East Substation.
Cancellation time: 22/09/2021 1935
Constraint set(s) revoked:
S-X_SEVC2+PAVC
The constraint sets contain equations with the following interconnector on the LHS:
V-S-MNSP1
V-SA
Refer AEMO Electricity Market Notice 90951
Manager NEM Real Time Operations
90964SETTLEMENTS RESIDUE22/09/2021 07:05:31 PM
[EventId:202109221905_NRM_QLD1_NSW1_started] NEGRES CONSTRAINT NRM_QLD1_NSW1 started operating from 22 September 2021 19:05
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1905 hrs on 22 September 2021
ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 22 September 2021.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the QLD to NSW directional interconnector.
The negative residue constraint set NRM_QLD1_NSW1 commenced operating from 1905 hrs on 22 September 2021.
This constraint set contains an equation with the following interconnectors on the LHS:
N-Q-MNSP1
NSW1-QLD1
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 1905 hrs on 22 September 2021
ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 22 September 2021.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the QLD to NSW directional interconnector.
The negative residue constraint set NRM_QLD1_NSW1 commenced operating from 1905 hrs on 22 September 2021.
This constraint set contains an equation with the following interconnectors on the LHS:
N-Q-MNSP1
NSW1-QLD1
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
90963POWER SYSTEM EVENTS22/09/2021 06:14:24 PM
Non-credible contingency event - SA region - 22/09/2021
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - SA region - 22/09/2021
At 1740 hrs the Torrens Island 66 kV East busbar tripped.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
Non-credible contingency event - SA region - 22/09/2021
At 1740 hrs the Torrens Island 66 kV East busbar tripped.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
90962SETTLEMENTS RESIDUE22/09/2021 05:30:28 PM
[EventId:202109221730_NRM_QLD1_NSW1_stopped] NEGRES CONSTRAINT NRM_QLD1_NSW1 ceased operating from 22 September 2021 17:30
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1730 hrs on 22 September 2021
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 22 September 2021.
Refer to market notice: 90960
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the QLD to NSW directional interconnector.
The negative residue constraint NRM_QLD1_NSW1 ceased operating at 1730 hrs on 22 September 2021.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1730 hrs on 22 September 2021
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 22 September 2021.
Refer to market notice: 90960
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the QLD to NSW directional interconnector.
The negative residue constraint NRM_QLD1_NSW1 ceased operating at 1730 hrs on 22 September 2021.
This is an AEMO autogenerated Market Notice.