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83932RECLASSIFY CONTINGENCY07/04/2021 02:26:35 PM
Reclassification of a Non-Credible Contingency Event: Dederang - Glenrowan No.1 & No.3 220 kV Lines line and Numurkah Solar Farm line in VIC1 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: VIC1
Lines: Dederang - Glenrowan No.1 & No.3 220 kV Lines and Numurkah Solar Farm
Duration: 07/04/2021 14:26 until further notice
Constraint set(s) invoked:
V-NIL_DDGN_NSF_N-2 Constraint set contains the following interconnector(s) on the left hand side:
V-S-MNSP1
VIC1-NSW1
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: VIC1
Lines: Dederang - Glenrowan No.1 & No.3 220 kV Lines and Numurkah Solar Farm
Duration: 07/04/2021 14:26 until further notice
Constraint set(s) invoked:
V-NIL_DDGN_NSF_N-2 Constraint set contains the following interconnector(s) on the left hand side:
V-S-MNSP1
VIC1-NSW1
Auto-generated on behalf of Manager NEM Real Time Operations
83930RECLASSIFY CONTINGENCY07/04/2021 01:54:55 PM
Cancellation of a Non-Credible Contingency Event: Dederang - Glenrowan No.1 & No.3 220 kV Lines line and Numurkah Solar Farm line in VIC1 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: VIC1
Lines: Dederang - Glenrowan No.1 & No.3 220 kV Lines and Numurkah Solar Farm
Cancellation time: 07/04/2021 13:54
Constraint set(s) revoked:
V-NIL_DDGN_NSF_N-2 Constraint set contains the following interconnector(s) on the left hand side:
V-S-MNSP1
VIC1-NSW1
Refer AEMO Electricity Market Notice 83928
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: VIC1
Lines: Dederang - Glenrowan No.1 & No.3 220 kV Lines and Numurkah Solar Farm
Cancellation time: 07/04/2021 13:54
Constraint set(s) revoked:
V-NIL_DDGN_NSF_N-2 Constraint set contains the following interconnector(s) on the left hand side:
V-S-MNSP1
VIC1-NSW1
Refer AEMO Electricity Market Notice 83928
Auto-generated on behalf of Manager NEM Real Time Operations
83929RECLASSIFY CONTINGENCY07/04/2021 12:13:21 PM
Reclassification of a Non-Credible Contingency Event: Eildon PS - Mt Beauty No.1 220 kV line and Eildon PS - Mt Beauty No.2 220 kV line in VIC1 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: VIC1
Lines: Eildon PS - Mt Beauty No.1 220 kV and Eildon PS - Mt Beauty No.2 220 kV
Duration: 07/04/2021 12:13 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: VIC1
Lines: Eildon PS - Mt Beauty No.1 220 kV and Eildon PS - Mt Beauty No.2 220 kV
Duration: 07/04/2021 12:13 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
83928RECLASSIFY CONTINGENCY07/04/2021 11:52:12 AM
Reclassification of a Non-Credible Contingency Event: Dederang - Glenrowan No.1 & No.3 220 kV Lines line and Numurkah Solar Farm line in VIC1 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: VIC1
Lines: Dederang - Glenrowan No.1 & No.3 220 kV Lines and Numurkah Solar Farm
Duration: 07/04/2021 11:52 until further notice
Constraint set(s) invoked:
V-NIL_DDGN_NSF_N-2 Constraint set contains the following interconnector(s) on the left hand side:
V-S-MNSP1
VIC1-NSW1
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: VIC1
Lines: Dederang - Glenrowan No.1 & No.3 220 kV Lines and Numurkah Solar Farm
Duration: 07/04/2021 11:52 until further notice
Constraint set(s) invoked:
V-NIL_DDGN_NSF_N-2 Constraint set contains the following interconnector(s) on the left hand side:
V-S-MNSP1
VIC1-NSW1
Auto-generated on behalf of Manager NEM Real Time Operations
83927RECLASSIFY CONTINGENCY06/04/2021 10:26:54 PM
Cancellation of a Non-Credible Contingency Event: Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line opening at the Wellington end only.
AEMO ELECTRICITY MARKET NOTICE
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency: Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line opening at the Wellington end only.
AEMO considers the the opening of the Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line at the Wellington end only is no longer reasonably possible.
Advice from the TNSP is that the fault has been identified and isolated.
Accordingly, AEMO cancels this reclassification as a credible contingency event.
Region: NSW
Lines: Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line
Duration: 05/04/2021 0315 hrs to 2100 hrs 06/04/2021
Constraint set(s) invoked: NONE
Refer to AEMO Electricity Market Notice 83917
Manager NEM Real Time Operations
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency: Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line opening at the Wellington end only.
AEMO considers the the opening of the Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line at the Wellington end only is no longer reasonably possible.
Advice from the TNSP is that the fault has been identified and isolated.
Accordingly, AEMO cancels this reclassification as a credible contingency event.
Region: NSW
Lines: Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line
Duration: 05/04/2021 0315 hrs to 2100 hrs 06/04/2021
Constraint set(s) invoked: NONE
Refer to AEMO Electricity Market Notice 83917
Manager NEM Real Time Operations
83923RESERVE NOTICE06/04/2021 10:30:35 AM
RESERVE NOTICE MT PASA PUBLICATION 6 April 2021
The MTPASA result published on 6 April 2021 identifies no Low Reserve Conditions.
Please note that MTPASA informs the market of potential reliability issues to allow the market to respond in the first instance, potentially avoiding the need for any market intervention or direction from AEMO.
For further information, please refer to:
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data/Market-Management-System-MMS/Projected-Assessment-of-System-Adequacy
This notice supersedes Market Notice 83853 published on 30th March 2021.
Background
As part of a broader process of implementing the reliability standard, AEMO runs the Medium Term Projected Assessment of System Adequacy (MTPASA) process weekly to forecast expected unserved energy levels over a two year period. If the expected annual unserved energy exceeds the maximum level specified by the Reliability Standard, a Low Reserve Condition is identified.
For more information about how AEMO implements the reliability standard, please view the Reliability Standard Implementation Guidelines (RSIG) available on AEMO's website at
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Planning-and-forecasting/Reliability-Standard-Implementation-Guidelines
Forecasting
AEMO
Please note that MTPASA informs the market of potential reliability issues to allow the market to respond in the first instance, potentially avoiding the need for any market intervention or direction from AEMO.
For further information, please refer to:
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data/Market-Management-System-MMS/Projected-Assessment-of-System-Adequacy
This notice supersedes Market Notice 83853 published on 30th March 2021.
Background
As part of a broader process of implementing the reliability standard, AEMO runs the Medium Term Projected Assessment of System Adequacy (MTPASA) process weekly to forecast expected unserved energy levels over a two year period. If the expected annual unserved energy exceeds the maximum level specified by the Reliability Standard, a Low Reserve Condition is identified.
For more information about how AEMO implements the reliability standard, please view the Reliability Standard Implementation Guidelines (RSIG) available on AEMO's website at
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Planning-and-forecasting/Reliability-Standard-Implementation-Guidelines
Forecasting
AEMO
83917RECLASSIFY CONTINGENCY05/04/2021 03:30:37 AM
Reclassification of a Non-Credible Contingency Event as a Credible Contingency: Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line opening at the Wellington end only. - 05/04/2021
AEMO ELECTRICITY MARKET NOTICE
Reclassification of a Non-Credible Contingency Event as a Credible Contingency: Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line opening at the Wellington end only. - 05/04/2021
AEMO considers the opening of the Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line at the Wellington end only now to be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Refer to AEMO Electricity Market Notice 83916
Region: NSW
Lines: Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line
Duration: 05/04/2021 0315 hrs until further notice
Constraint set(s) invoked: NONE
Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event as a Credible Contingency: Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line opening at the Wellington end only. - 05/04/2021
AEMO considers the opening of the Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line at the Wellington end only now to be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Refer to AEMO Electricity Market Notice 83916
Region: NSW
Lines: Wellington - Beryl Tee Bodangora 94B 132 kV Transmission line
Duration: 05/04/2021 0315 hrs until further notice
Constraint set(s) invoked: NONE
Manager NEM Real Time Operations
83916POWER SYSTEM EVENTS04/04/2021 11:00:48 PM
Non-credible contingency event - NSW region - 04/04/2021
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - NSW region - 04/04/2021
At 2233 hrs the Wellington - Beryl Tee Bodangora 94B 132 kV Line tripped at the Wellington end only.
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 - NSW region - 04/04/2021
At 2233 hrs the Wellington - Beryl Tee Bodangora 94B 132 kV Line tripped at the Wellington end only.
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
83905INTER-REGIONAL TRANSFER03/04/2021 01:33:43 AM
Inter-regional transfer limit variation: Hazelwood - South Morang No 1 500 kV Line (VIC) - Voltage Control
AEMO ELECTRICITY MARKET NOTICE
The Hazelwood - South Morang No 1 500 kV Line has been de-energised to manage voltages in the Victoria region.
The following constraint set was invoked at 0130 hrs 03/04/2021.
V-HWSM
The constraint set contains equations with the following interconnectors on the LHS.
T-V-MNSP
V-S-MNSP1
V-SA
VIC1-NSW1
Refer to AEMO Network Outage Scheduler (NOS) for further details
Manager NEM Real Time Operations
The Hazelwood - South Morang No 1 500 kV Line has been de-energised to manage voltages in the Victoria region.
The following constraint set was invoked at 0130 hrs 03/04/2021.
V-HWSM
The constraint set contains equations with the following interconnectors on the LHS.
T-V-MNSP
V-S-MNSP1
V-SA
VIC1-NSW1
Refer to AEMO Network Outage Scheduler (NOS) for further details
Manager NEM Real Time Operations