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55958POWER SYSTEM EVENTS01/12/2016 12:31:57 AM
AEMO advises that South Australia has seperated from the NEM
AEMO ELECTRICITY MARKET NOTICE
POWER SYSTEM EVENT
At 0016 hrs 1st December 2016 the SA power system seperated from the NEM but remains operating as a separate entity. AEMO are investigating the cause and will develop and implement a reconnection plan as soon as practical.
Manager NEM Real Time Operations
POWER SYSTEM EVENT
At 0016 hrs 1st December 2016 the SA power system seperated from the NEM but remains operating as a separate entity. AEMO are investigating the cause and will develop and implement a reconnection plan as soon as practical.
Manager NEM Real Time Operations
55900POWER SYSTEM EVENTS30/11/2016 01:19:06 AM
Non-credible contingency event - NSW region - 30 Nov 2016
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - NSW region - 30 Nov 2016
At 0039 hrs the Liddell-Tomago No. 82 line tripped at the Tomago 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
Non-credible contingency event - NSW region - 30 Nov 2016
At 0039 hrs the Liddell-Tomago No. 82 line tripped at the Tomago 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
55737POWER SYSTEM EVENTS15/11/2016 01:02:37 AM
Non-credible contingency event - Queensland region - 14 Nov 2016
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - Queensland region - 14 Nov 2016
At 2034 hrs the Innisfail No2 132 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 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
Non-credible contingency event - Queensland region - 14 Nov 2016
At 2034 hrs the Innisfail No2 132 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 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
55629POWER SYSTEM EVENTS10/11/2016 05:26:46 PM
Non-credible contingency event - Vic region - 10/11/16
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - Vic region - 10/11/16
At 0953 hrs the Hazelwood - Loy Yang No. 1 500 kV Line tripped at the Hazelwood end only. The line was placed on load at 0956 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 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
Non-credible contingency event - Vic region - 10/11/16
At 0953 hrs the Hazelwood - Loy Yang No. 1 500 kV Line tripped at the Hazelwood end only. The line was placed on load at 0956 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 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
55582POWER SYSTEM EVENTS08/11/2016 02:55:36 PM
Non-credible contingency event - Multiple Generator trip Qld region - 08/11/2016
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - Multiple Generator trip Qld Region 08/11/2016
A trip of three generators at H48 Braemar2 Power Station occurred at 1407 hrs
Braemar 5 tripped from 153 MW
Braemar 6 tripped from 151 MW
Braemar 7 tripped from 72 MW
The total loss of generation was approximately 376 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 still being investigated.
Manager NEM Real Time Operations
Non-credible contingency event - Multiple Generator trip Qld Region 08/11/2016
A trip of three generators at H48 Braemar2 Power Station occurred at 1407 hrs
Braemar 5 tripped from 153 MW
Braemar 6 tripped from 151 MW
Braemar 7 tripped from 72 MW
The total loss of generation was approximately 376 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 still being investigated.
Manager NEM Real Time Operations
55495POWER SYSTEM EVENTS29/10/2016 06:15:11 PM
Update - Non-credible contingency event - NSW Region - 28 Oct 2016
AEMO ELECTRICITY MARKET NOTICE
Update - Non-credible contingency event - NSW Region - 28 Oct 2016
Refer to MN 55483
At 1400hrs 29/10/16 the Canberra - Williamsdale No.3C 330kV transmission line and the Williamsdale 1 330/132 kV transformer 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
Update - Non-credible contingency event - NSW Region - 28 Oct 2016
Refer to MN 55483
At 1400hrs 29/10/16 the Canberra - Williamsdale No.3C 330kV transmission line and the Williamsdale 1 330/132 kV transformer 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
55483POWER SYSTEM EVENTS28/10/2016 07:33:44 AM
Non-credible contingency event - NSW region - 28 Oct 2016
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - NSW region - 28 Oct 2016
At 0543 hrs the Canberra - Williamsdale No.3C 330kV transmission line and the Williamsdale 1 330/132 kV transformer 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
Non-credible contingency event - NSW region - 28 Oct 2016
At 0543 hrs the Canberra - Williamsdale No.3C 330kV transmission line and the Williamsdale 1 330/132 kV transformer 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
55456POWER SYSTEM EVENTS21/10/2016 09:26:29 PM
Update - Non-credible contingency event - Qld Region - 21 Oct 2016
AEMO ELECTRICITY MARKET NOTICE
Update - Non-credible contingency event - Qld Region - 21 Oct 2016
Refer to MN 55453
At 2101 hrs the Townsville South No 2 132kV 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
Update - Non-credible contingency event - Qld Region - 21 Oct 2016
Refer to MN 55453
At 2101 hrs the Townsville South No 2 132kV 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
55453POWER SYSTEM EVENTS21/10/2016 02:34:05 PM
Non-credible contingency event - Queensland region 21 October 2016
AEMO ELECTRICITY MARKET NOTICE
Townsville South Number 2 bus trip.
AEMO has become aware of the following circumstance(s) with respect to the power system,
At 1408 hrs the Townsville South Number 2 bus tripped. This disconnected the following feeders:
7303 Townsville South - Mount Stuart 132 kV line
7243 Townsville South - Mount Stuart 132 kV line
7130 Townsville South - Invicta Mill Tee Clare South 132 kV line
7249 Townsville South - Ross 132 kV line
7237 Townsville South - Townsville Zinc 132 kV line
The following constraint sets have been invoked
Q-MSPTS_7243
Q-MSPTS_7303
AEMO did not instruct load shedding.
Simultaneously with this event AEMO has observed a reduction in the electrical demand in the Queensland region of approximately 60 MW.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
Townsville South Number 2 bus trip.
AEMO has become aware of the following circumstance(s) with respect to the power system,
At 1408 hrs the Townsville South Number 2 bus tripped. This disconnected the following feeders:
7303 Townsville South - Mount Stuart 132 kV line
7243 Townsville South - Mount Stuart 132 kV line
7130 Townsville South - Invicta Mill Tee Clare South 132 kV line
7249 Townsville South - Ross 132 kV line
7237 Townsville South - Townsville Zinc 132 kV line
The following constraint sets have been invoked
Q-MSPTS_7243
Q-MSPTS_7303
AEMO did not instruct load shedding.
Simultaneously with this event AEMO has observed a reduction in the electrical demand in the Queensland region of approximately 60 MW.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations