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63660POWER SYSTEM EVENTS31/07/2018 05:40:10 AM
Correction - Non-credible contingency event - NSW region
AEMO ELECTRICITY MARKET NOTICE
Correction - It was 85 line that opened at one end only
Non-credible contingency event - NSW region - 31/07/2018
At 0324 hrs 31/07/18 at the Armidale Tamworth 330 kV (86) line tripped and auto reclosed, simultaneously with this at the Tamworth end only, the Armidale Tamworth (85) 330 kV line opened and auto reclosed.
AEMO did not instruct load shedding.
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
Correction - It was 85 line that opened at one end only
Non-credible contingency event - NSW region - 31/07/2018
At 0324 hrs 31/07/18 at the Armidale Tamworth 330 kV (86) line tripped and auto reclosed, simultaneously with this at the Tamworth end only, the Armidale Tamworth (85) 330 kV line opened and auto reclosed.
AEMO did not instruct load shedding.
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
63659POWER SYSTEM EVENTS31/07/2018 05:07:28 AM
Non-credible contingency event - NSW region
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - NSW region - 31/07/2018
At 0324 hrs 31/07/18 at the Armidale Tamworth 330 kV (85) line tripped and auto reclosed, simultaneously with this at the Tamworth end only, the Armidale Tamworth (86) 330 kV line opened and auto reclosed.
AEMO did not instruct load shedding.
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 - NSW region - 31/07/2018
At 0324 hrs 31/07/18 at the Armidale Tamworth 330 kV (85) line tripped and auto reclosed, simultaneously with this at the Tamworth end only, the Armidale Tamworth (86) 330 kV line opened and auto reclosed.
AEMO did not instruct load shedding.
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
63449POWER SYSTEM EVENTS13/07/2018 06:15:50 PM
Update - Non-credible contingency event - Qld region - 13/07/2018
AEMO ELECTRICITY MARKET NOTICE
Update - Non-credible contingency event - Qld region - 13/07/2018
Update to MN 63443
At 1803 hrs the Woree No1 132 kV was returned to service.
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
Update - Non-credible contingency event - Qld region - 13/07/2018
Update to MN 63443
At 1803 hrs the Woree No1 132 kV was returned to service.
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
63443POWER SYSTEM EVENTS13/07/2018 05:21:28 PM
Non-credible contingency event - Qld region - 13/07/2018
AEMO ELECTRICITY MARKET NOTICE
At 1633 hrs 13/07/2018, the Woree No.1 132 kV bus was offloaded.
(the No 1 275/132 kV Transformer remained on load).
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
At 1633 hrs 13/07/2018, the Woree No.1 132 kV bus was offloaded.
(the No 1 275/132 kV Transformer remained on load).
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
63318POWER SYSTEM EVENTS02/07/2018 04:09:29 PM
Update - Non-credible contingency event - Queensland region
AEMO ELECTRICITY MARKET NOTICE
Refer to Market Notice 63309
Update - Non-credible contingency event - Queensland region
The cause of the Calliope River - Gin Gin (814) 275kV Transmission Line trip has been identified and isolated.
The line was returned to service at 1607 hrs 02/07/2018
AEMO will not reclassify this event as a credible contingency event.
Manager NEM Real Time Operations
Refer to Market Notice 63309
Update - Non-credible contingency event - Queensland region
The cause of the Calliope River - Gin Gin (814) 275kV Transmission Line trip has been identified and isolated.
The line was returned to service at 1607 hrs 02/07/2018
AEMO will not reclassify this event as a credible contingency event.
Manager NEM Real Time Operations
63309POWER SYSTEM EVENTS02/07/2018 08:29:49 AM
Non-credible contingency event - Queenslad region
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - Queenslad region
At 0755 hrs 02/07/2018 during planned switching at Calliope River substation the Calliope River - Gin Gin (814) 275kV Transmission Line 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 is not known at this stage and the line remains out of service.
Manager NEM Real Time Operations
Non-credible contingency event - Queenslad region
At 0755 hrs 02/07/2018 during planned switching at Calliope River substation the Calliope River - Gin Gin (814) 275kV Transmission Line 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 is not known at this stage and the line remains out of service.
Manager NEM Real Time Operations
63256POWER SYSTEM EVENTS21/06/2018 09:41:05 PM
Non-credible contingency event - NSW region - 21/06/2018
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - NSW region - 21/06/2018
At 1718 hrs the 996 Wagga 330 - ANM tee Morven 132 kV line tripped at the Wagga 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 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 - NSW region - 21/06/2018
At 1718 hrs the 996 Wagga 330 - ANM tee Morven 132 kV line tripped at the Wagga 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 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
63204POWER SYSTEM EVENTS14/06/2018 08:55:12 AM
Non-credible contingency event - Queensland region
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - Queensland region
At 0806hrs the H40 Wurdong No 1 275 kV bus 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
Non-credible contingency event - Queensland region
At 0806hrs the H40 Wurdong No 1 275 kV bus 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
63200POWER SYSTEM EVENTS14/06/2018 03:00:24 AM
Non-credible contingency event - Vic region - 14/06/18
AEMO ELECTRICITY MARKET NOTICE
At 0126 hrs the APD Potline 1 and the APD Potline 2 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 is not known at this stage.
Manager NEM Real Time Operations
At 0126 hrs the APD Potline 1 and the APD Potline 2 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 is not known at this stage.
Manager NEM Real Time Operations