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75327POWER SYSTEM EVENTS12/04/2020 01:39:59 PM
Update - Non-credible contingency event - Vic region 11/04/2020
AEMO ELECTRICITY MARKET NOTICE.
Refer market notice 75304
A non-credible contingency event occurred in the Vic region on 11/04/2020
At Yallourn Power Station the following units tripped:
Yallourn Unit 3 tripped at 1326 hrs, Yallourn Unit 1 tripped at 1328 hrs, Yallourn Unit 4 tripped at 1328 hrs
At 1326 hrs Macarthur Wind Farm 4 collector groups (300 MW) disconnected.
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
Refer market notice 75304
A non-credible contingency event occurred in the Vic region on 11/04/2020
At Yallourn Power Station the following units tripped:
Yallourn Unit 3 tripped at 1326 hrs, Yallourn Unit 1 tripped at 1328 hrs, Yallourn Unit 4 tripped at 1328 hrs
At 1326 hrs Macarthur Wind Farm 4 collector groups (300 MW) disconnected.
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
75304POWER SYSTEM EVENTS11/04/2020 02:07:24 PM
Non-credible contingency event - Vic region
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Vic region - 11/04/2020
At Yallourn Power Station the following units tripped
At 1326 hrs - Unit W3
At 1328 hrs - Units W1 and W4
also at 1326 hrs Macarthur Wind Farm 4 collector groups (300 MW) disconnected.
AEMO has not been advised of any disconnection of bulk electrical load.
AEMO did not instruct load shedding.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
Non-credible contingency event - Vic region - 11/04/2020
At Yallourn Power Station the following units tripped
At 1326 hrs - Unit W3
At 1328 hrs - Units W1 and W4
also at 1326 hrs Macarthur Wind Farm 4 collector groups (300 MW) disconnected.
AEMO has not been advised of any disconnection of bulk electrical load.
AEMO did not instruct load shedding.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
75095POWER SYSTEM EVENTS01/04/2020 05:35:19 PM
Update - Non-credible contingency event - SA region - 01/04/2020
AEMO ELECTRICITY MARKET NOTICE.
At 1541 hrs at Snuggery 132kV Gen 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
At 1541 hrs at Snuggery 132kV Gen 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
75094POWER SYSTEM EVENTS01/04/2020 04:32:15 PM
Non-credible contingency event - SA region - 01/04/2020
AEMO ELECTRICITY MARKET NOTICE.
At 1541 hrs at Snuggery 132kV Gen 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
At 1541 hrs at Snuggery 132kV Gen 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
74788POWER SYSTEM EVENTS06/03/2020 03:07:45 PM
Update - Non-credible contingency event - Qld region - 06/03/2020
AEMO ELECTRICITY MARKET NOTICE.
Refer AEMO ELECTRICITY MARKET NOTICE MN 74771
At 1401 hrs at H10 Bouldercombe 275 kV CB 5022 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
Refer AEMO ELECTRICITY MARKET NOTICE MN 74771
At 1401 hrs at H10 Bouldercombe 275 kV CB 5022 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
74771POWER SYSTEM EVENTS06/03/2020 05:53:22 AM
Non-credible contingency event - QLD region - 06/03/2020
AEMO ELECTRICITY MARKET NOTICE.
At 0503 hrs at H10 Bouldercombe 275 kV CB 5022 opened.
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
At 0503 hrs at H10 Bouldercombe 275 kV CB 5022 opened.
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
74648POWER SYSTEM EVENTS02/03/2020 08:20:28 PM
Update - Separation of the Victorian and South Australian Regions 02 Mar 2020
AEMO ELECTRICITY MARKET NOTICE.
Update to Market Notice 74613
At 2005 hrs the South Australian region was synchronised to Victoria at Heywood Terminal.
The following Constraint sets were revoked at 2020 hrs
F-ESTN_ISLE
F-ESTN_TL_0600
F-SA_ESTN_ISLE_REG
F-SA_MOPS_ISLE
SA_ESTN_ISLE
Manager NEM Real Time Operations
Update to Market Notice 74613
At 2005 hrs the South Australian region was synchronised to Victoria at Heywood Terminal.
The following Constraint sets were revoked at 2020 hrs
F-ESTN_ISLE
F-ESTN_TL_0600
F-SA_ESTN_ISLE_REG
F-SA_MOPS_ISLE
SA_ESTN_ISLE
Manager NEM Real Time Operations
74613POWER SYSTEM EVENTS02/03/2020 12:22:27 PM
Separation of the Victorian and South Australian Regions 02 Mar 2020
AEMO ELECTRICITY MARKET NOTICE.
POWER SYSTEM EMERGENCY CONDITIONS
Separation of the Victorian and South Australian Regions 02 Mar 2020
At 1200 hrs the Victorian and South Australian regions separated at Heywood Terminal.
The following Constaint sets were invoked to manage the situation from 1215 hrs
F-ESTN_ISLE
F-SA_ESTN_ISLE_REG
F-SA_MOPS_ISLE
SA_ESTN_ISLE
Manager NEM Real Time Operations
POWER SYSTEM EMERGENCY CONDITIONS
Separation of the Victorian and South Australian Regions 02 Mar 2020
At 1200 hrs the Victorian and South Australian regions separated at Heywood Terminal.
The following Constaint sets were invoked to manage the situation from 1215 hrs
F-ESTN_ISLE
F-SA_ESTN_ISLE_REG
F-SA_MOPS_ISLE
SA_ESTN_ISLE
Manager NEM Real Time Operations
74500POWER SYSTEM EVENTS27/02/2020 03:02:13 AM
Update - Non-credible contingency event - Qld region - 26/02/2020
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - Qld region - 26/02/2020
Refer AEMO Electricity Notice 74494
At 2350 hrs 26/02/2020 the Calvale - Stanwell 8873 and 8874 275 kV Lines tripped and auto reclosed single pole operation.
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 - 26/02/2020
Refer AEMO Electricity Notice 74494
At 2350 hrs 26/02/2020 the Calvale - Stanwell 8873 and 8874 275 kV Lines tripped and auto reclosed single pole operation.
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