Market Notices

85057POWER SYSTEM EVENTS03/05/2021 05:30:24 AM

Non-credible contingency event - Victoria region - 03/05/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - Victoria region - 03/05/2021

At 0439 hrs 03/05/2021 at the Wodonga terminal station the No.1 and No.2 330/66/22 kV transformers tripped.
As a consequence of the protection operation the Dederang - Wodonga and the Jindera - Wodonga 330kV lines were offloaded.
34 MW of local load was lost.

At 0450 hrs the Dederang - Wodonga and the Jindera - Wodonga 330kV lines were restored to service.

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
     
84249POWER SYSTEM EVENTS13/04/2021 07:02:01 PM

Non-credible contingency event - Qld region - 13/04/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - Qld region - 13/04/2021

At 1804 hrs the H73 Raglan No 2 275kV 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
     
84081POWER SYSTEM EVENTS10/04/2021 11:53:17 AM

Non-credible contingency event - Tas region - 10/04/2021

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - Tas region - 10/04/2021

At 1133 hrs the Farrell-John Butters and Farrell-Rosebery-Newton-Queenstown lines tripped simultaneously and auto reclosed.

AEMO did not instruct load shedding.

AEMO has been advised of the disconnection of approximately 2MW of bulk electrical load.

The cause of this non credible contingency event has been identified and the lines have been reclassified. Refer AEMO Electricity Market Notice 84080.

Manager NEM Real Time Operations
     
83916POWER SYSTEM EVENTS04/04/2021 11:00:48 PM

Non-credible contingency event - NSW region - 04/04/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - NSW region - 04/04/2021

At 2233 hrs the Wellington - Beryl Tee Bodangora 94B 132 kV Line tripped at the Wellington 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 is not known at this stage.


Manager NEM Real Time Operations
     
83525POWER SYSTEM EVENTS22/03/2021 01:04:17 PM

Update - Non-credible contingency event - Qld region - 22/03/2021

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - Qld region - 22/03/2021

Refer AEMO ELECTRICITY MARKET NOTICE MN 83524

At 1301 hrs the Western Downs No 2 275 kV 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
     
83524POWER SYSTEM EVENTS22/03/2021 12:05:29 PM

Non-credible contingency event - Qld region - 22/03/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - Qld region - 22/03/2021

At 1147 hrs the S5_Western Downs No 2 275 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 is not known at this stage.


Manager NEM Real Time Operations
     
83276POWER SYSTEM EVENTS12/03/2021 11:58:26 PM

Update - Non-credible contingency event - SA region - 12/03/2021

AEMO ELECTRICITY MARKET NOTICE.

The cause of this non credible contingency event has been identified.

AEMO accordingly no longer considers the following equipment to be a credible contingency.


Region: SA

Elements: Torrens Island Power Station Units 1, 2, 3 and 4

Cancellation time: 12/03/2021 23:40 hrs

Constraint set(s) revoked: S-TIPSB_N-2

Refer AEMO Electricity Market Notice 83253


Manager NEM Real Time Operations




     
83253POWER SYSTEM EVENTS12/03/2021 05:56:07 PM

Update - Non-credible contingency event - SA region - 12/03/2021

Update - Non-credible contingency event - SA region - 12/03/2021

AEMO ELECTRICITY MARKET NOTICE.

Refer AEMO ELECTRICITY MARKET NOTICE MN83251

The cause of this non credible contingency event has been identified.

AEMO has therefore reclassified this event as a credible contingency event until further notice.

Region: SA

Elements: Torrens Island Power Station Units 1, 2, 3 and 4
Duration: 12/03/2021 17:50 until further notice
Constraint set(s) invoked: S-TIPSB_N-2

Manager NEM Real Time Operations
     
83251POWER SYSTEM EVENTS12/03/2021 05:39:29 PM

Non-credible contingency event - SA region - 12/03/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - SA region - 12/03/2021

At 1708 hrs the Torrens Island Power Station West A and West B 275 kV buses tripped. Barkers Inlet generation (88MW) also 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
     
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