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112079RECLASSIFY CONTINGENCY08/12/2023 12:41:55 PM
Reclassification of a Non-Credible Contingency Event: Tungatinah-Lake Echo-Waddamana 1 110kV line and Tungatinah-Waddamana 2 110kV line in TAS1 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: TAS1
Lines: Tungatinah-Lake Echo-Waddamana 1 110kV and Tungatinah-Waddamana 2 110kV
Duration: 08/12/2023 12:41 until further notice
Constraint set(s) invoked:
T-TUWA12_110_N-2 Constraint set contains the following interconnector(s) on the left hand side:
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: TAS1
Lines: Tungatinah-Lake Echo-Waddamana 1 110kV and Tungatinah-Waddamana 2 110kV
Duration: 08/12/2023 12:41 until further notice
Constraint set(s) invoked:
T-TUWA12_110_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
112078RECLASSIFY CONTINGENCY08/12/2023 11:51:05 AM
Reclassification of a Non-Credible Contingency Event: Farrell-John Butters line and Farrell-Rosebery-Newton-Queenstown line in TAS1 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: TAS1
Lines: Farrell-John Butters and Farrell-Rosebery-Newton-Queenstown
Duration: 08/12/2023 11:51 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: TAS1
Lines: Farrell-John Butters and Farrell-Rosebery-Newton-Queenstown
Duration: 08/12/2023 11:51 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
112077RECLASSIFY CONTINGENCY08/12/2023 11:36:01 AM
Reclassification of a Non-Credible Contingency Event: Farrell - Reece No.1 220 kV line and Farrell - Reece No.2 220 kV line in TAS1 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: TAS1
Lines: Farrell - Reece No.1 220 kV and Farrell - Reece No.2 220 kV
Duration: 08/12/2023 11:35 until further notice
Constraint set(s) invoked:
F-T-FARE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
T-V-MNSP1
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: TAS1
Lines: Farrell - Reece No.1 220 kV and Farrell - Reece No.2 220 kV
Duration: 08/12/2023 11:35 until further notice
Constraint set(s) invoked:
F-T-FARE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
T-V-MNSP1
Auto-generated on behalf of Manager NEM Real Time Operations
112074RECLASSIFY CONTINGENCY08/12/2023 10:50:21 AM
Reclassification of non-credible contingency event due to existence of widespread abnormal conditions - 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 1050 hrs 08/12/2023.
Constraint set invoked: I-VS_250
Duration: 1050 hrs 08/12/2023. 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 1050 hrs 08/12/2023.
Constraint set invoked: I-VS_250
Duration: 1050 hrs 08/12/2023. 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
112059RECLASSIFY CONTINGENCY08/12/2023 09:52:08 AM
Reclassification of a Non-Credible Contingency Event: Loss of Sheffield 220 kV switchyard (all 220 kV buses) in Tas due to planned work
AEMO ELECTRICITY MARKET NOTICE.
Reclassification of a non-credible contingency event as a credible contingency event due to planned work.
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:TAS
Plant: Sheffield 220 kV switchyard (all 220 kV buses)
Duration: 08/12/2023 : 1000 hrs until further notice
Constraint set(s) invoked: T:SH_220_N-2
Manager NEM Real Time Operations
Reclassification of a non-credible contingency event as a credible contingency event due to planned work.
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:TAS
Plant: Sheffield 220 kV switchyard (all 220 kV buses)
Duration: 08/12/2023 : 1000 hrs until further notice
Constraint set(s) invoked: T:SH_220_N-2
Manager NEM Real Time Operations
112057RESERVE NOTICE08/12/2023 05:21:05 AM
PDPASA - Cancellation of the Forecast Lack Of Reserve Level 1 (LOR1) in the NSW Region on 08/12/2023
AEMO ELECTRICITY MARKET NOTICE
The Forecast LOR1 condition in the NSW region advised in AEMO Electricity Market Notice No. 112052 is cancelled at 0515 hrs 08/12/2023.
Manager NEM Real Time Operations
The Forecast LOR1 condition in the NSW region advised in AEMO Electricity Market Notice No. 112052 is cancelled at 0515 hrs 08/12/2023.
Manager NEM Real Time Operations
112056RECLASSIFY CONTINGENCY08/12/2023 11:09:48 AM
Reclassification of a Non-Credible Contingency Event: South East - Tailem Bend No.1 and No.2 275 kV lines 275kV lines in SA due to severe weather warning.
AEMO ELECTRICITY MARKET NOTICE.
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 to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: SA
Lines: South East - Tailem Bend No.1 and No.2 275 kV lines
Duration: 08/12/2023 11:10 hrs until further notice
Constraint set(s) invoked: S-SETB_N-2
Manager NEM Real Time Operations
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 to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: SA
Lines: South East - Tailem Bend No.1 and No.2 275 kV lines
Duration: 08/12/2023 11:10 hrs until further notice
Constraint set(s) invoked: S-SETB_N-2
Manager NEM Real Time Operations
112055RECLASSIFY CONTINGENCY08/12/2023 11:07:29 AM
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.
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 to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: SA
Lines: Para-Templers West and Magill-Torrens Island A 275kV lines
Duration: 08/12/2023 10:50 hrs 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 due to severe weather warning.
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: SA
Lines: Para-Templers West and Magill-Torrens Island A 275kV lines
Duration: 08/12/2023 10:50 hrs until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations
112054RECLASSIFY CONTINGENCY08/12/2023 11:08:47 AM
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.
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 to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: SA
Lines: Brinkworth-Davenport, Brinkworth-Templers West and Para-Templers West 275kV lines
Duration: 08/12/2023 10:50 hrs 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 due to severe weather warning.
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: SA
Lines: Brinkworth-Davenport, Brinkworth-Templers West and Para-Templers West 275kV lines
Duration: 08/12/2023 10:50 hrs until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations