Market Notices

72991POWER SYSTEM EVENTS25/01/2020 01:02:44 AM

Non-credible contingency event - Qld region -25 January 2020 - correction

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - Qld region - 25 January 2020

At 0020 hrs in Far North Qld
The Chalumbin - Ross (857) 275 kV line and the Chalumbin - Ross (858) 275 kV line opened and auto reclosed.
The Edmonton - Innisfail (7139) 132kV line and the Tully - Woree (7301) 132 kV line opened and auto reclosed.
The Mt Emerald - Walkamin (8903) 275 kV line opened.
Kareeya PS tripped from 5 MW.
In Far North Qld 214 MW of load was interrupted during the auto reclose operation.

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.

Manager NEM Real Time Operations
72990POWER SYSTEM EVENTS25/01/2020 12:58:22 AM

Non-credible contingency event - Qld region -25 January 2020

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - Qld region - 25 January 2020

At 0020 hrs in Far North Qld
The Chalumbin - Ross (857) 275 kV line and the Chalumbin - Ross (858) 275 kV line opened and auto reclosed.
The Edmonton - Innisfail (7139) 132kV line and the Tully - Woree (7301) 132 kV line opened and auto reclosed.
The Mt Emerald - Walkamin (8903) 275 kV line opened.
Kareeya PS tripped from 5 MW.
In Far North Qld 214 MW of load was interrupted during the auto reclose operation.

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.

The cause of this non credible contingency event is 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.

Manager NEM Real Time Operations
72976POWER SYSTEM EVENTS24/01/2020 04:11:44 PM

Correction -Non-credible contingency event - Qld region - Friday, 24 January 2020

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - Qld region - Friday, 24 January 2020

At 1546 hrs the Nebo - Strathmore 8845 275 kV Line opened at the Strathmore end only.

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
72975POWER SYSTEM EVENTS24/01/2020 04:07:11 PM

Non-credible contingency event - Qld region - Friday, 24 January 2020

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - Qld region - Friday, 24 January 2020

At 1546 hrs the Nebo - Strathmore 275 kV Line opened at the Strathmore end only.

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
72753POWER SYSTEM EVENTS20/01/2020 08:56:39 AM

Update - Non-credible contingency event - SA region - 20/01/2020

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - SA region - 20/01/2020

Refer AEMO ELECTRICITY MARKET NOTICE MN 72743

At 0835 hrs the Torrens Island A 275kV West bus 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
72743POWER SYSTEM EVENTS20/01/2020 12:20:09 AM

Non-credible contingency event - SA region - 20/01/2020

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - SA region - 20/01/2020

At 0004 hrs the Torrens Island A 275kV West 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 is not known at this stage.

Manager NEM Real Time Operations
72646POWER SYSTEM EVENTS17/01/2020 09:46:01 AM

Update - Non-credible contingency event - Qld region - 17/01/2020

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - Qld region - 17/01/2020

Refer AEMO ELECTRICITY MARKET NOTICE 72644

At 0802 hrs the Nebo - Wotonga No 7118 132kV line and the Wotonga SVC 1 tripped.

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.

Manager NEM Real Time Operations
72644POWER SYSTEM EVENTS17/01/2020 08:23:39 AM

Non-credible contingency event - Qld region - 17/01/2020

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - Qld region - 17/01/2020

At 0802 hrs the Nebo - Wotonga No 7118 132kV line and the Wotonga SVC 1 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
72610POWER SYSTEM EVENTS16/01/2020 09:09:06 AM

Update - Non-credible contingency event - Tas region - 16/01/2020

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - Tas region - 16/01/2020

Refer AEMO ELECTRICITY MARKET NOTICE 72608

At 0732 hrs the Lindisfarne - Mornington Tee - Rokeby No. 1 and 2 110kV lines tripped.

The cause of this non credible contingency event has been identified as due to lightning.
AEMO is not satisfied that this non credible event is unlikely to re-occur.
AEMO will therefore reclassify this event as a credible contingency event when lightning is in the vicinity.

Manager NEM Real Time Operations
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