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Cancellation 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.
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: TAS1
Lines: Farrell - Reece No.1 220 kV and Farrell - Reece No.2 220 kV
Cancellation time: 23/04/2024 22:33
Constraint set(s) revoked:
F-T-FARE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
T-V-MNSP1
Refer AEMO Electricity Market Notice 116295
Auto-generated on behalf of Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event: Palmerston - Hadspen 3 & 4 110kV line and line in TAS1 due to Lightning.
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: Palmerston - Hadspen 3 & 4 110kV and
Duration: 23/04/2024 22:28 until further notice
Constraint set(s) invoked:
T-HAPM_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: Farrell - Reece No.1 220 kV line and Farrell - Reece No.2 220 kV line in TAS1 due to Lightning.
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: 23/04/2024 21:33 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
Non-credible contingency event - VIC region - 23/04/2024
Non-credible contingency event - VIC region - 23/04/2024
At 1056 hrs the MOPS 11 Gen TX 2 Bus 500kV CB and the Dundonnell WF 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 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.
Manager NEM Real Time Operations
Cancellation of the reclassification of a Non-Credible contingency event: Farrell - Sheffield Nos 1 and 2 220kV Lines line in TAS due to Bushfire.
Cancellation of the reclassification of a Non-Credible contingency event as a Credible contingency event due to Bushfire. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any non credible event activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: TAS
Lines: Farrell - Sheffield Nos 1 and 2 220kV Lines
Cancellation time: 13:40 hrs 22/04/2024
Constraint set(s) revoked:
T-FASH_N-2_CP4_SB
T-NIL_WCP_CLOSE
Refer AEMO Electricity Market Notice 116269
Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event: Farrell - Sheffield No. 1 and 2 220kV Lines in TAS due to Bushfire.
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Bushfire. 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
Lines: Farrell - Sheffield No. 1 and 2 220kV Lines
Duration:12:50 hrs 22/04/2024 until further notice
Constraint set(s) invoked:
T-NIL_WCP_CLOSE
F-FASH_N-2_CP4_SB
Manager NEM Real Time Operations
Cancellation of a Non-Credible Contingency Event: Armidale - Dumaresq 8C 330kV line and Armidale - Sapphire WF 8E 330kV line in NSW1 due to Lightning.
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: NSW1
Lines: Armidale - Dumaresq 8C 330kV and Armidale - Sapphire WF 8E 330kV
Cancellation time: 18/04/2024 18:34
Constraint set(s) revoked:
N-ARDM_ARSR_1PH_N-2 Constraint set contains the following interconnector(s) on the left hand side:
N-Q-MNSP1
NSW1-QLD1
Refer AEMO Electricity Market Notice 116191
Auto-generated on behalf of Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event: Armidale - Dumaresq 8C 330kV line and Armidale - Sapphire WF 8E 330kV line in NSW1 due to Lightning.
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: NSW1
Lines: Armidale - Dumaresq 8C 330kV and Armidale - Sapphire WF 8E 330kV
Duration: 18/04/2024 14:32 until further notice
Constraint set(s) invoked:
N-ARDM_ARSR_1PH_N-2 Constraint set contains the following interconnector(s) on the left hand side:
N-Q-MNSP1
NSW1-QLD1
Auto-generated on behalf of Manager NEM Real Time Operations
Cancellation of a Non-Credible Contingency Event: Armidale - Dumaresq 8C 330kV line and Armidale - Sapphire WF 8E 330kV line in NSW1 due to Lightning.
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: NSW1
Lines: Armidale - Dumaresq 8C 330kV and Armidale - Sapphire WF 8E 330kV
Cancellation time: 18/04/2024 14:29
Constraint set(s) revoked:
N-ARDM_ARSR_1PH_N-2 Constraint set contains the following interconnector(s) on the left hand side:
N-Q-MNSP1
NSW1-QLD1
Refer AEMO Electricity Market Notice 116187
Auto-generated on behalf of Manager NEM Real Time Operations