Market Notices

100721POWER SYSTEM EVENTS02/08/2022 10:12:55 PM

Update - Non-credible contingency event - SA region - 02/08/2022

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - SA region - 02/08/2022

Refer AEMO ELECTRICITY MARKET NOTICE MN100708

At 1924 hrs the Keith 132kV CB6109 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
     
100708POWER SYSTEM EVENTS02/08/2022 08:34:05 PM

Non-credible contingency event - SA region - 02/08/2022

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - SA region - 02/08/2022

At 1924 hrs the Keith 132kV CB6109 tripped and auto reclosed.

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
     
100476POWER SYSTEM EVENTS25/07/2022 02:12:04 AM

Non-credible contingency event - 25/07/2022

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - 25/07/2022

At 0115 hrs 25/07/2022 there was an unplanned outage of the following plant.
Buronga - Broken Hill X2 220 kV Line - interrupted Broken Hill
Buronga - Balranald X3 220 kV Line
Buronga - Redcliffs 0X1 220 kV Line
Buronga No. 1, No. 2 and No. 3 Synchronous Condenser
Redcliffs - Murraylink 220 kV Line - which offloaded Murraylink
Balranald - Darlington Point X5 220 kV Line
Broken Hill - Silverton WF X6 220 kV Line (which tripped Silverton WF)
Kiata Wind Farm


AEMO did not instruct load shedding.

Load was lost at Broken Hill and Balranald (approx. 40 MW in total)

The cause of this non credible contingency event is not known at this stage.

Manager NEM Real Time Operations
     
100247POWER SYSTEM EVENTS14/07/2022 01:40:48 PM

Non-credible contingency event - NSW region - 14/07/2022

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - NSW region - 14/07/2022

At 1215 hrs the 14/07/2022 at Liddell substation the 832 330 kV CB opened offloading Liddell - Muswellbrook 83 330 kV line.

The 83 330kV line was manually placed back on load at 1216 hrs.

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
     
99720POWER SYSTEM EVENTS27/06/2022 04:37:38 PM

Non-credible contingency event - QLD region - 27/06/2022

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - QLD region - 27/06/2022

At 1444 hrs Braemar Unit 1 tripped and R2 Braemar - Braemar PS 8838 275 kV 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.


Manager NEM Real Time Operations
     
96966POWER SYSTEM EVENTS12/06/2022 05:36:00 AM

Non-credible contingency event - Tas region - 12/06/2022

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - Tas region - 12/06/2022

At 0456 hrs the Burnie - Hampshire 110 kV Line tripped. At the same time the Burnie - Sheffield No. 2 110 kV Line tripped at the Burnie end only and Studland Bay WF tripped from 62 MW

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
     
96965POWER SYSTEM EVENTS12/06/2022 02:01:19 AM

Non-credible contingency event - Tas region - 12/06/2022

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - Tas region - 12/06/2022

At 0131 hrs the Burnie - Hampshire 110 kV Line tripped at the Burnie 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
     
96964POWER SYSTEM EVENTS11/06/2022 11:12:09 PM

Non-credible contingency event - Tas region - 11/06/2022

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - Tas region - 11/06/2022

At 2229 hrs the Palmerston - St Marys tee Avoca 110 kV Line tripped and Mussleroe Wind Farm reduced output by approximately 135 MW.

AEMO did not instruct load shedding.

Approximately 9 MW load was lost.

The cause of this non-credible contingency event is not known at this stage.

Manager NEM Real Time Operations
     
96818POWER SYSTEM EVENTS05/06/2022 06:31:49 PM

Update - Non-credible contingency event - Tas region - 05/06/2022

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - Tas region - 05/06/2022

Refer AEMO ELECTRICITY MARKET NOTICE 96781

At 1758 hrs the Gordon - Chapel Street No. 2 220 kV Line 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
     
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