Market Notices

90955POWER SYSTEM EVENTS22/09/2021 02:38:44 PM

Update - Non-credible contingency event - VIC region - 22/09/2021

AEMO ELECTRICITY MARKET NOTICE

Update - Non-credible contingency event - VIC region - 22/09/2021

At 0916 hrs the Springvale No. 1 220 kV busbar tripped.

Refer AEMO ELECTRICITY MARKET NOTICE MN90937 and MN90939

At 0925 hrs the Springvale No. 1 220 kV busbar was returned to service.

Further investigation has identified that this was a credible contingency event.


Manager NEM Real Time Operations
90950POWER SYSTEM EVENTS22/09/2021 12:01:24 PM

Non-credible contingency event - SA region - 22/09/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - SA region - 22/09/2021

At 1134 hrs the No. 1 and No. 2 275 kV Static Var Compensator (SVC) at South East Substation 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.

The following constraint set was invoked at 1145 hrs

S-X_SEVC2+PAVC

The constraint sets contain equations with the following interconnector on the LHS:

V-S-MNSP1
V-SA

Refer to AEMO Network Outage Scheduler (NOS) for further details.

Manager NEM Real Time Operations
90939POWER SYSTEM EVENTS22/09/2021 10:26:19 AM

Update - Non-credible contingency event - VIC region - 22/09/2021

AEMO ELECTRICITY MARKET NOTICE

Update - Non-credible contingency event - VIC region - 22/09/2021

At 0916 hrs the Springvale No. 1 220 kV busbar tripped.

Refer AEMO ELECTRICITY MARKET NOTICE MN90937

At 0925 hrs the Springvale No. 1 220 kV busbar 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
90937POWER SYSTEM EVENTS22/09/2021 10:24:43 AM

Non-credible contingency event - VIC region - 22/09/2021

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - VIC region - 22/09/2021

At 0916 hrs the Springvale No. 1 220 kV busbar 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
90433POWER SYSTEM EVENTS13/09/2021 01:33:49 PM

Update - Non-credible contingency event - Qld region - 12/09/2021

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - Qld region - 12/09/2021

Refer AEMO Electricity Market Notice 90396

At 2215 hrs the Ross - Townsville South 7249 132 kV line tripped and auto-reclosed and the Kennedy Energy Park Wind Farm tripped.

The cause of this non credible contingency has been identified. AEMO will not reclassify this event as a credible contingency event.


Manager NEM Real Time Operations


90396POWER SYSTEM EVENTS12/09/2021 11:16:30 PM

Non-credible contingency event - Qld region - 12/09/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - Qld region - 12/09/2021

At 2215 hrs the Ross - Townsville South 7249 132 kV line tripped and auto-reclosed and the Kennedy Energy Park Wind Farm 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
90395POWER SYSTEM EVENTS12/09/2021 07:39:49 PM

Non-credible contingency event - SA region - 12/09/2021

Non-credible contingency event - SA region - 12/09/2021

At 1822 hrs at Canowie substation circuit breakers CB 6501 and CB 6502 tripped which resulted in the following:
Opening of the Canowie - Robertstown 275 kV Line at the Canowie end only
Opening of the Canowie - Mt Lock 275 kV Line at the Canowie end only
Disconnection of Hallett substation and Hallet WF

At 1826 hrs CB 6501 at Canowie was manually closed which returned the Canowie - Robertstown 275 kV Line and the Canowie - Mt Lock 275 kV Line into 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
90307POWER SYSTEM EVENTS09/09/2021 07:16:04 PM

Update - Non-credible contingency event - Tas region - 09/09/2021

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - Tas region - 09/09/2021

Refer AEMO ELECTRICITY MARKET NOTICE MN 90306

At 1846 hrs the Gordon Power Station the 'B' 220 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
90306POWER SYSTEM EVENTS09/09/2021 05:54:56 PM

Non-credible contingency event - Tas region - 09/09/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - Tas region - 09/09/2021

At 1738 hrs at Gordon Power Station the 'B' 220 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
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