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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
56410RESERVE NOTICE23/12/2016 01:37:39 PM
Cancellation - Actual LOR2 South Australia Region - 23/12/2016
AEMO ELECTRICITY MARKET NOTICE
Cancellation - Actual LOR2 South Australia Region - 23/12/2016
Refer AEMO Electricity Market Notices 56398 and 56405
An actual LOR2 condition has been cancelled for the South Australia region from 1330 hrs
Manager NEM Real Time Operations
Cancellation - Actual LOR2 South Australia Region - 23/12/2016
Refer AEMO Electricity Market Notices 56398 and 56405
An actual LOR2 condition has been cancelled for the South Australia region from 1330 hrs
Manager NEM Real Time Operations
56405RESERVE NOTICE23/12/2016 07:26:01 AM
Actual LOR2 South Australia Region - 23/12/2016
AEMO ELECTRICITY MARKET NOTICE
Actual LOR2 South Australia Region - 23/12/2016
Refer AEMO Electricity Market Notice 56398
An actual LOR2 condition has been declared for the South Australia region from 0715 hrs and is forecast to continue until 1330 hrs 23/12/16 during a planned outage of the Moorabool - Mortlake PS 500k V Line in Victoria
If a credible contingency event occurs in this period the South Australia region would separate from the rest of the NEM and is likely to result in interruptions to power supplies.
There are sufficient capacity reserves in the South Australia region to meet electricity demand but it may not be possible to bring the required additional capacity into service in time to avoid automatic under-frequency load shedding causing power interruptions.
Manager NEM Real Time Operations
Actual LOR2 South Australia Region - 23/12/2016
Refer AEMO Electricity Market Notice 56398
An actual LOR2 condition has been declared for the South Australia region from 0715 hrs and is forecast to continue until 1330 hrs 23/12/16 during a planned outage of the Moorabool - Mortlake PS 500k V Line in Victoria
If a credible contingency event occurs in this period the South Australia region would separate from the rest of the NEM and is likely to result in interruptions to power supplies.
There are sufficient capacity reserves in the South Australia region to meet electricity demand but it may not be possible to bring the required additional capacity into service in time to avoid automatic under-frequency load shedding causing power interruptions.
Manager NEM Real Time Operations
56391RESERVE NOTICE22/12/2016 01:20:44 PM
Cancellation of the Actual (LOR2) condition in the South Australia Region- 22/12/16
AEMO ELECTRICITY MARKET NOTICE
Cancellation of the Actual (LOR2) condition in the South Australia Region- 22/12/16
Refer to AEMO Electricity Market Notice No. 56388
The Actual LOR2 condition in the South Australia Region is cancelled at 1311 hrs 22/12/16
Manager NEM Real Time Operations
Cancellation of the Actual (LOR2) condition in the South Australia Region- 22/12/16
Refer to AEMO Electricity Market Notice No. 56388
The Actual LOR2 condition in the South Australia Region is cancelled at 1311 hrs 22/12/16
Manager NEM Real Time Operations
56388RESERVE NOTICE22/12/2016 06:08:22 AM
Actual LOR2 South Australia Region - 22/12/2016
AEMO ELECTRICITY MARKET NOTICE
Actual LOR2 South Australia Region - 22/12/2016
Refer AEMO Electricity Market Notice 56380
An actual LOR2 condition has been declared for the South Australia region from 0600 hrs and is forecast to continue until 1530 hrs 22/12/16 during a planned outage of the Heywood - Tarrone PS 500k V Line in Victoria
If a credible contingency event occurs in this period the South Australia region would separate from the rest of the NEM and is likely to result in interruptions to power supplies.
There are sufficient capacity reserves in the South Australia region to meet electricity demand but it may not be possible to bring the required additional capacity into service in time to avoid automatic under-frequency load shedding causing power interruptions.
Manager NEM Real Time Operations
Actual LOR2 South Australia Region - 22/12/2016
Refer AEMO Electricity Market Notice 56380
An actual LOR2 condition has been declared for the South Australia region from 0600 hrs and is forecast to continue until 1530 hrs 22/12/16 during a planned outage of the Heywood - Tarrone PS 500k V Line in Victoria
If a credible contingency event occurs in this period the South Australia region would separate from the rest of the NEM and is likely to result in interruptions to power supplies.
There are sufficient capacity reserves in the South Australia region to meet electricity demand but it may not be possible to bring the required additional capacity into service in time to avoid automatic under-frequency load shedding causing power interruptions.
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