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126271POWER SYSTEM EVENTS04/04/2025 07:44:04 AM
Update - Non-credible contingency event - QLD region - 04/04/2025
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - QLD region - 04/04/2025
Refer AEMO Electricity Market Notice 126262
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 cancel the reclassification of this event as a credible contingency event.
Manager NEM Real Time Operations
Update - Non-credible contingency event - QLD region - 04/04/2025
Refer AEMO Electricity Market Notice 126262
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 cancel the reclassification of this event as a credible contingency event.
Manager NEM Real Time Operations
126263GENERAL NOTICE04/04/2025 08:11:29 AM
Update - Vulnerable lines in Qld region
AEMO ELECTRICITY MARKET NOTICE.
Update - Lightning vulnerable lines in Qld region
Refer to AEMO Electricity Market Notice 126262 and 126271
At 0152 hrs 04/04/2025 the the Ross - Townsville South No 7156 and 7249 132kV lines tripped.
The cause of the trip was identified as due to lightning.
In accordance with SO_OP_3715, AEMO now considers the the Ross - Townsville South No 7156 and 7249 132kV lines to be vulnerable with a category of probable due to lightning.
Manager NEM Real Time Operations
Update - Lightning vulnerable lines in Qld region
Refer to AEMO Electricity Market Notice 126262 and 126271
At 0152 hrs 04/04/2025 the the Ross - Townsville South No 7156 and 7249 132kV lines tripped.
The cause of the trip was identified as due to lightning.
In accordance with SO_OP_3715, AEMO now considers the the Ross - Townsville South No 7156 and 7249 132kV lines to be vulnerable with a category of probable due to lightning.
Manager NEM Real Time Operations
126262POWER SYSTEM EVENTS04/04/2025 02:15:54 AM
Non-credible contingency event - QLD region - 04/04/2025
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - QLD region - 04/04/2025
At 0152 hrs the Ross - Townsville South No 7156 and 7249 132kV lines tripped and auto reclosed.
The cause of this non credible contingency event is not known at this stage.
AEMO is not satisfied that this non credible event is unlikely to re-occur.
AEMO has therefore reclassified this event as a credible contingency event until further notice.
Region: QLD
Elements: Ross - Townsville South No 7156 and 7249 132kV lines.
Duration: 0152 hrs 04/04/2025 until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations
Non-credible contingency event - QLD region - 04/04/2025
At 0152 hrs the Ross - Townsville South No 7156 and 7249 132kV lines tripped and auto reclosed.
The cause of this non credible contingency event is not known at this stage.
AEMO is not satisfied that this non credible event is unlikely to re-occur.
AEMO has therefore reclassified this event as a credible contingency event until further notice.
Region: QLD
Elements: Ross - Townsville South No 7156 and 7249 132kV lines.
Duration: 0152 hrs 04/04/2025 until further notice
Constraint set(s) invoked: Nil
Manager NEM Real Time Operations
126023CONSTRAINTS28/03/2025 03:39:03 PM
Update to Victorian system normal Kerang voltage stability limit
AEMO ELECTRICITY MARKET NOTICE
AEMO has completed a review of a system normal voltage stability limit in north west Victoria as a result of commissioning of BESS at Koorangie. The revised limit manages pre-contingent flow on the Wemen to Koorangie 220 kV line to avoid voltage collapse at Koorangie, Kerang or Wemen on loss of the Crowlands to Bulgana to Horsham or Horsham to Murra Warra to Kiamal 220 kV line. The revised constraint equation includes the generators in south-west NSW and north-west Victoria on the left-hand side as well as Murraylink and V-SA. 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 will be implemented at 0900 hrs on Monday 31st March 2025, by updating V^^V_NIL_KGTS.
For full details on the factors this constraint equation has now been loaded into AEMO's pre-production systems.
For further details on this constraint equation please contact terry.liu@aemo.com.au
Terry Liu
AEMO Operations
AEMO has completed a review of a system normal voltage stability limit in north west Victoria as a result of commissioning of BESS at Koorangie. The revised limit manages pre-contingent flow on the Wemen to Koorangie 220 kV line to avoid voltage collapse at Koorangie, Kerang or Wemen on loss of the Crowlands to Bulgana to Horsham or Horsham to Murra Warra to Kiamal 220 kV line. The revised constraint equation includes the generators in south-west NSW and north-west Victoria on the left-hand side as well as Murraylink and V-SA. 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 will be implemented at 0900 hrs on Monday 31st March 2025, by updating V^^V_NIL_KGTS.
For full details on the factors this constraint equation has now been loaded into AEMO's pre-production systems.
For further details on this constraint equation please contact terry.liu@aemo.com.au
Terry Liu
AEMO Operations
125963POWER SYSTEM EVENTS26/03/2025 04:20:27 PM
Non-credible contingency event - TAS region - 26/03/2025
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - TAS region - 26/03/2025
At 1551 hrs the Palmerston A 220kV Bus tripped.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
Approximately 40MW of generation was disconnected.
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
Non-credible contingency event - TAS region - 26/03/2025
At 1551 hrs the Palmerston A 220kV Bus tripped.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
Approximately 40MW of generation was disconnected.
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
125721RESERVE NOTICE16/03/2025 07:14:22 PM
Cancellation of Actual (LOR1) condition in the NSW region - 16/03/2025
AEMO ELECTRICITY MARKET NOTICE
Cancellation of Actual (LOR1) condition in the NSW region - 16/03/2025
The Actual LOR1 Condition in the NSW Region advised in AEMO Electricity Market Notice No.125715 is cancelled at 1915 hrs 16/03/2025.
Manager NEM Real Time Operations
Cancellation of Actual (LOR1) condition in the NSW region - 16/03/2025
The Actual LOR1 Condition in the NSW Region advised in AEMO Electricity Market Notice No.125715 is cancelled at 1915 hrs 16/03/2025.
Manager NEM Real Time Operations
125715RESERVE NOTICE16/03/2025 05:14:31 PM
Actual Lack Of Reserve Level 1 (LOR1) in the NSW region - 16/03/2025
AEMO ELECTRICITY MARKET NOTICE
Actual Lack Of Reserve Level 1 (LOR1) in the NSW region - 16/03/2025
An Actual LOR1 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the NSW region from 1700 hrs.
The Actual LOR1 condition is forecast to exist until 1830 hrs
The forecast capacity reserve requirement is 1684 MW.
The minimum capacity reserve available is 1242 MW.
Manager NEM Real Time Operations
Actual Lack Of Reserve Level 1 (LOR1) in the NSW region - 16/03/2025
An Actual LOR1 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the NSW region from 1700 hrs.
The Actual LOR1 condition is forecast to exist until 1830 hrs
The forecast capacity reserve requirement is 1684 MW.
The minimum capacity reserve available is 1242 MW.
Manager NEM Real Time Operations
125701POWER SYSTEM EVENTS16/03/2025 11:47:57 AM
Non-credible contingency event - QLD region - 16/03/2025
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - QLD region - 16/03/2025
At 1131 hrs the H35 Strathmore 132 kV No 2 bus tripped. Whitsunday Solar farm and Hamilton Solar farm were disconnected.
AEMO did not instruct load shedding.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
Non-credible contingency event - QLD region - 16/03/2025
At 1131 hrs the H35 Strathmore 132 kV No 2 bus tripped. Whitsunday Solar farm and Hamilton Solar farm were disconnected.
AEMO did not instruct load shedding.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
125692RESERVE NOTICE15/03/2025 06:36:39 PM
Cancellation of Actual (LOR1) condition in the NSW region - 15/03/2025
AEMO ELECTRICITY MARKET NOTICE
Cancellation of Actual (LOR1) condition in the NSW region - 15/03/2025
The Actual LOR1 Condition in the NSW Region advised in AEMO Electricity Market Notice No.125691 is cancelled at 1835 hrs 15/03/2025.
Manager NEM Real Time Operations
Cancellation of Actual (LOR1) condition in the NSW region - 15/03/2025
The Actual LOR1 Condition in the NSW Region advised in AEMO Electricity Market Notice No.125691 is cancelled at 1835 hrs 15/03/2025.
Manager NEM Real Time Operations