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56425POWER SYSTEM EVENTS24/12/2016 12:22:56 AM
Update - Non-credible contingency event - Queensland region - Friday, 23 December 2016
AEMO ELECTRICITY MARKET NOTICE
Update - Non-credible contingency event - Queensland region - Friday, 23 December 2016
Update to market notice 56423
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 - Queensland region - Friday, 23 December 2016
Update to market notice 56423
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
56423POWER SYSTEM EVENTS23/12/2016 10:59:34 PM
Non-credible contingency event - Queensland region - Friday, 23 December 2016
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - Queensland region - Friday, 23 December 2016
Innsfail No1 132 kV Busbar tripped at 2247 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
Non-credible contingency event - Queensland region - Friday, 23 December 2016
Innsfail No1 132 kV Busbar tripped at 2247 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
56359POWER SYSTEM EVENTS20/12/2016 11:05:26 AM
Update - Non-credible contingency events- Tas region - 20/12/16
AEMO ELECTRICITY MARKET NOTICE
Update - Non-credible contingency events - Tas region - 20/12/16
This market notice provides an update to two non-credible contingency events that occurred in the Tasmania region on 20/12/16.
At 0933 hrs the Sheffield - George Town No. 1 and No. 2 220 kV Lines tripped simultaneously (refer to market notice 56344).
At 0939 hrs Wilmot, Lemonthyme, Cethana, Devils Gate, Fisher and Rowallan generating units tripped (refer to market notice 56357).
The cause of these two non-credible contingency events has been identified and AEMO is satisfied that another occurrence of these events is unlikely under the current circumstances.
AEMO will not reclassify these events as a credible contingency events.
Manager NEM Real Time Operations
Update - Non-credible contingency events - Tas region - 20/12/16
This market notice provides an update to two non-credible contingency events that occurred in the Tasmania region on 20/12/16.
At 0933 hrs the Sheffield - George Town No. 1 and No. 2 220 kV Lines tripped simultaneously (refer to market notice 56344).
At 0939 hrs Wilmot, Lemonthyme, Cethana, Devils Gate, Fisher and Rowallan generating units tripped (refer to market notice 56357).
The cause of these two non-credible contingency events has been identified and AEMO is satisfied that another occurrence of these events is unlikely under the current circumstances.
AEMO will not reclassify these events as a credible contingency events.
Manager NEM Real Time Operations
56357POWER SYSTEM EVENTS20/12/2016 10:22:05 AM
Update - Non-credible contingency event - Tas region - 20/12/16
AEMO ELECTRICITY MARKET NOTICE
Update - Non-credible contingency event - Tas region - 20/12/16
In addition to the non-credible contingency event at 0933 hrs (refer to market notice 56344), there was a further non-credible contingency event at 0939 hrs as described below.
At 0939 hrs the following generation tripped in the Tasmania region
Wilmot, Lemonthyme, Cethana, Devils Gate, Fisher and Rowallan
At approximately the same time there was approximately 170 MW of major industrial load reduction.
The cause of this non credible contingency event is not known at this stage.
AEMO did not instruct load shedding.
Manager NEM Real Time Operations
Update - Non-credible contingency event - Tas region - 20/12/16
In addition to the non-credible contingency event at 0933 hrs (refer to market notice 56344), there was a further non-credible contingency event at 0939 hrs as described below.
At 0939 hrs the following generation tripped in the Tasmania region
Wilmot, Lemonthyme, Cethana, Devils Gate, Fisher and Rowallan
At approximately the same time there was approximately 170 MW of major industrial load reduction.
The cause of this non credible contingency event is not known at this stage.
AEMO did not instruct load shedding.
Manager NEM Real Time Operations
56344POWER SYSTEM EVENTS20/12/2016 09:44:45 AM
Non-credible contingency event - Tas region - 20/12/16
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - Tas region - 20/12/16
At 0933 hrs the Sheffield - George Town No. 1 and No. 2 220 kV Lines tripped simultaneously.
The cause of this non credible contingency event is not known at this stage.
AEMO did not instruct load shedding.
Manager NEM Real Time Operations
Non-credible contingency event - Tas region - 20/12/16
At 0933 hrs the Sheffield - George Town No. 1 and No. 2 220 kV Lines tripped simultaneously.
The cause of this non credible contingency event is not known at this stage.
AEMO did not instruct load shedding.
Manager NEM Real Time Operations
56339POWER SYSTEM EVENTS20/12/2016 08:01:44 AM
Non-credible contingency event - Vic region - 20/12/16
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - Vic region - 20/12/16
At 0738 hrs the Eildon Mount Beauty No. 1 and No. 2 220 kV Lines tripped simultaneously. There is lightning occurring in the vicinity of these lines.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
Manager NEM Real Time Operations
Non-credible contingency event - Vic region - 20/12/16
At 0738 hrs the Eildon Mount Beauty No. 1 and No. 2 220 kV Lines tripped simultaneously. There is lightning occurring in the vicinity of these lines.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
Manager NEM Real Time Operations
56324POWER SYSTEM EVENTS18/12/2016 12:25:43 PM
Update - Non-credible contingency event - Queensland region - Saturday, 17 December 2016
AEMO ELECTRICITY MARKET NOTICE
Update - Non-credible contingency event - Queensland region - Saturday, 17 December 2016
Update to market notice 56316
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 - Queensland region - Saturday, 17 December 2016
Update to market notice 56316
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
56316POWER SYSTEM EVENTS17/12/2016 11:14:52 PM
Non-credible contingency event - Queensland region - Saturday, 17 December 2016
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - Queensland region - Saturday, 17 December 2016
Dysart No1 132 kV Busbar tripped at 2223 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
Non-credible contingency event - Queensland region - Saturday, 17 December 2016
Dysart No1 132 kV Busbar tripped at 2223 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
56169POWER SYSTEM EVENTS05/12/2016 03:04:48 AM
Update: Simultaneous trip of Basslink and Farrell - Shefield No. 1 220 kV line- Tas region
AEMO ELECTRICITY MARKET NOTICE
Update: Simultaneous trip of Basslink and Farrell - Shefield No. 1 220 kV line - Tas region. 05-12-2016
Refer to MN 56165, 56155 and 47855
At 0043 hrs the Basslink and Farrell - Shefield No. 1 220 kV line tripped simultaneously. This simultaneous trip is currently declared a credible contingency event - Refer to MN 47855
Farrell - Sheffield No1 220 kV line returned to service at 0047 hrs
Basslink returned to service at 0245 hrs
Constraint set I-BL_ZERO revoked at 0245 hrs.
The outage constraint set contains the following interconnector onthe left hand side.
T-V_MNSP1
Manager NEM Real Time Operations
Update: Simultaneous trip of Basslink and Farrell - Shefield No. 1 220 kV line - Tas region. 05-12-2016
Refer to MN 56165, 56155 and 47855
At 0043 hrs the Basslink and Farrell - Shefield No. 1 220 kV line tripped simultaneously. This simultaneous trip is currently declared a credible contingency event - Refer to MN 47855
Farrell - Sheffield No1 220 kV line returned to service at 0047 hrs
Basslink returned to service at 0245 hrs
Constraint set I-BL_ZERO revoked at 0245 hrs.
The outage constraint set contains the following interconnector onthe left hand side.
T-V_MNSP1
Manager NEM Real Time Operations