Market Notices

83110POWER SYSTEM EVENTS04/03/2021 04:36:40 AM

Update - Non-credible contingency event - Qld region - 04/03/2021

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - Qld region - 04/03/2021

Refer AEMO ELECTRICITY MARKET NOTICE MN83109

At 0429 hrs the Dysart No 1 Transformer and the Dysart SVC were 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
83109POWER SYSTEM EVENTS04/03/2021 01:44:25 AM

Non-credible contingency event - Qld region - 04/03/2021

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - Qld region - 04/03/2021

At 0124 hrs the Dysart No 1 Transformer and the Dysart SVC tripped.

AEMO did not instruct load shedding.

AEMO has been advised of the disconnection of approximately 40MW of bulk electrical load.

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

Manager NEM Real Time Operations
83056POWER SYSTEM EVENTS28/02/2021 01:23:49 AM

Non-credible contingency event - QLD region - 28/02/2021

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - QLD region - 28/02/2021

At 0049 hrs 28/02/2021 the Baralaba - Moura 7112 132 kV Transmission line opened at the Baralaba end only.

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

Manager NEM Real Time Operations
82959POWER SYSTEM EVENTS22/02/2021 10:25:25 PM

Non-credible contingency event - Qld region - 22/02/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - Qld region - 22/02/2021

At 2120 hrs the South Pine SVC and the Mount England - Wivenhoe Power Station No 824 275 kV line tripped.

All equipment has been returned to service at 2214 hrs.

The cause of this non credible contingency event has been identified.
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
82603POWER SYSTEM EVENTS05/02/2021 03:21:56 AM

Non-credible contingency event - Qld Region - 05/02/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - Qld Region - 05/02/2021

At 0248 hrs the T31 Baralaba Nos 1 and 2 132 kV Buses 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
82383POWER SYSTEM EVENTS26/01/2021 09:53:22 AM

Update - Non-credible contingency event - SA region - 24/01/2021

AEMO ELECTRICITY MARKET NOTICE.
Refer Market Notice 82348
Non-credible contingency event - SA region - 24/01/2021

As of 09:55 hrs 26/01/2021 all Lines have been returned to service

Tailem Bend - Cherry Gardens 275 kV Line

Cherry Gardens - Mount Barker South 275 kV Line

Cherry Gardens - Mt Barker 132 kV Line

Constraint Set S-CGTB1 revoked at 0955 hrs 26/01/2021.

The cause of this non credible contingency has been being identified and will not be reclassified as a credible event.

Manager NEM Real Time Operations
82348POWER SYSTEM EVENTS24/01/2021 06:29:56 PM

Non-credible contingency event - SA region - 24/01/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - SA region - 24/01/2021

At 1646 hrs the following Lines tripped in the SA region

Tailem Bend - Cherry Gardens 275 kV Line

Cherry Gardens - Mount Barker South 275 kV Line

Cherry Gardens - Mt Barker 132 kV Line


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 has been being identified.

Constraint Set S-CGTB1 invoked from 1655 hrs

Manager NEM Real Time Operations


82340POWER SYSTEM EVENTS24/01/2021 05:08:41 PM

AEMO SCADA Failure NEM -24/01/2021


Refer AEMO Electricity Market Notice 82330

AEMO SCADA service has been returned to normal in all regions at 1646 hrs.


Manager NEM Real Time Operations


82330POWER SYSTEM EVENTS24/01/2021 04:33:39 PM

AEMO SCADA Failure NEM -24/01/2021


AEMO is currently experiencing failure of SCADA in all regions.

AEMO is investigating the failure.

Manager NEM Real Time Operations







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