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126801RECLASSIFY CONTINGENCY30/04/2025 12:36:25 PM
Reclassification of a Non-Credible Contingency Event: Armidale - Dumaresq 8C 330kV line and Armidale - Sapphire WF 8E 330kV line in NSW1 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: NSW1
Lines: Armidale - Dumaresq 8C 330kV and Armidale - Sapphire WF 8E 330kV
Duration: 30/04/2025 12:36 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
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: 30/04/2025 12:36 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
126800PRICES UNCHANGED30/04/2025 11:05:24 AM
[EventId:202504301045_confirmed] Prices for interval 30-Apr-2025 10:45 are now confirmed
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1105 hrs on 30 April 2025
PRICES ARE NOW CONFIRMED for trading interval 30-Apr-2025 10:45.
In accordance with Market Notice 126790 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs did not apply
Prices remain unchanged.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1105 hrs on 30 April 2025
PRICES ARE NOW CONFIRMED for trading interval 30-Apr-2025 10:45.
In accordance with Market Notice 126790 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs did not apply
Prices remain unchanged.
This is an AEMO autogenerated Market Notice.
126799PRICES UNCHANGED30/04/2025 11:05:24 AM
[EventId:202504301105_confirmed] Prices for interval 30-Apr-2025 11:05 are now confirmed
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1105 hrs on 30 April 2025
PRICES ARE NOW CONFIRMED for trading interval 30-Apr-2025 11:05.
In accordance with Market Notice 126794 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs did not apply
Prices remain unchanged.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1105 hrs on 30 April 2025
PRICES ARE NOW CONFIRMED for trading interval 30-Apr-2025 11:05.
In accordance with Market Notice 126794 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs did not apply
Prices remain unchanged.
This is an AEMO autogenerated Market Notice.
126798PRICES UNCHANGED30/04/2025 11:05:24 AM
[EventId:202504301100_confirmed] Prices for interval 30-Apr-2025 11:00 are now confirmed
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1105 hrs on 30 April 2025
PRICES ARE NOW CONFIRMED for trading interval 30-Apr-2025 11:00.
In accordance with Market Notice 126793 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs did not apply
Prices remain unchanged.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1105 hrs on 30 April 2025
PRICES ARE NOW CONFIRMED for trading interval 30-Apr-2025 11:00.
In accordance with Market Notice 126793 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs did not apply
Prices remain unchanged.
This is an AEMO autogenerated Market Notice.
126797PRICES UNCHANGED30/04/2025 11:05:23 AM
[EventId:202504301055_confirmed] Prices for interval 30-Apr-2025 10:55 are now confirmed
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1105 hrs on 30 April 2025
PRICES ARE NOW CONFIRMED for trading interval 30-Apr-2025 10:55.
In accordance with Market Notice 126792 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs did not apply
Prices remain unchanged.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1105 hrs on 30 April 2025
PRICES ARE NOW CONFIRMED for trading interval 30-Apr-2025 10:55.
In accordance with Market Notice 126792 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs did not apply
Prices remain unchanged.
This is an AEMO autogenerated Market Notice.
126796PRICES UNCHANGED30/04/2025 11:05:23 AM
[EventId:202504301050_confirmed] Prices for interval 30-Apr-2025 10:50 are now confirmed
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1105 hrs on 30 April 2025
PRICES ARE NOW CONFIRMED for trading interval 30-Apr-2025 10:50.
In accordance with Market Notice 126791 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs did not apply
Prices remain unchanged.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1105 hrs on 30 April 2025
PRICES ARE NOW CONFIRMED for trading interval 30-Apr-2025 10:50.
In accordance with Market Notice 126791 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs did not apply
Prices remain unchanged.
This is an AEMO autogenerated Market Notice.
126795PRICES UNCHANGED30/04/2025 11:05:24 AM
[EventId:202504301040_confirmed] Prices for interval 30-Apr-2025 10:40 are now confirmed
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1105 hrs on 30 April 2025
PRICES ARE NOW CONFIRMED for trading interval 30-Apr-2025 10:40.
In accordance with Market Notice 126789 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs did not apply
Prices remain unchanged.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1105 hrs on 30 April 2025
PRICES ARE NOW CONFIRMED for trading interval 30-Apr-2025 10:40.
In accordance with Market Notice 126789 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs did not apply
Prices remain unchanged.
This is an AEMO autogenerated Market Notice.
126787RECLASSIFY CONTINGENCY29/04/2025 09:39:51 PM
Cancellation of a Non-Credible Contingency Event: Bannaby - Mt Piper 5A6 500kV line and Bannaby - Mt Piper 5A7 500kV line in NSW1 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: NSW1
Lines: Bannaby - Mt Piper 5A6 500kV and Bannaby - Mt Piper 5A7 500kV
Cancellation time: 29/04/2025 21:39
Constraint set(s) revoked:
N-5A6+5A7_N-2 Constraint set contains the following interconnector(s) on the left hand side:
N-Q-MNSP1
NSW1-QLD1
VIC1-NSW1
Refer AEMO Electricity Market Notice 126774
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: NSW1
Lines: Bannaby - Mt Piper 5A6 500kV and Bannaby - Mt Piper 5A7 500kV
Cancellation time: 29/04/2025 21:39
Constraint set(s) revoked:
N-5A6+5A7_N-2 Constraint set contains the following interconnector(s) on the left hand side:
N-Q-MNSP1
NSW1-QLD1
VIC1-NSW1
Refer AEMO Electricity Market Notice 126774
Auto-generated on behalf of Manager NEM Real Time Operations
126786CONSTRAINTS29/04/2025 05:43:58 PM
Updated Victorian system normal voltage stability limit for the south-west Victoria
AEMO ELECTRICITY MARKET NOTICE
Refer to Market Notice 101368
AEMO has completed a review of the system normal voltage stability limit in the south-west Victoria as a result of Mortlake terminal station cut-in on the Haunted Gully to Tarrone 500 kV line.
The revised limit is increased by 100 MW on the cut-set from Haunted Gully to Moorabool and Mortlake to Moorabool 500 kV lines for flow towards Moorabool.
Full details on the limits advice are to be published shortly on the AEMO website: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
The revised limit has been implemented at 1201 hrs on Tuesday 29th April 2025, by updating V^^V_NIL_SWVIC.
For further details on this constraint equation please contact terry.liu@aemo.com.au
Terry Liu
AEMO Operations
Refer to Market Notice 101368
AEMO has completed a review of the system normal voltage stability limit in the south-west Victoria as a result of Mortlake terminal station cut-in on the Haunted Gully to Tarrone 500 kV line.
The revised limit is increased by 100 MW on the cut-set from Haunted Gully to Moorabool and Mortlake to Moorabool 500 kV lines for flow towards Moorabool.
Full details on the limits advice are to be published shortly on the AEMO website: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
The revised limit has been implemented at 1201 hrs on Tuesday 29th April 2025, by updating V^^V_NIL_SWVIC.
For further details on this constraint equation please contact terry.liu@aemo.com.au
Terry Liu
AEMO Operations