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80258POWER SYSTEM EVENTS23/11/2020 10:24:11 AM
Non-credible contingency event - Victoria region - 23/11/2020
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Victoria region - 23/11/2020
At 0933 hrs at the Wodonga terminal station the No.1 and No.2 330/66/22 kV transformers tripped.
As a consequence of the protection operation the Dederang - Wodonga and the Jindera - Wodonga 330kV lines were offloaded.
51 MW of local load was lost.
At 0952 hrs the Dederang - Wodonga and the Jindera - Wodonga 330kV lines were restored to service.
AEMO did not instruct load shedding.
AEMO has 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 - Victoria region - 23/11/2020
At 0933 hrs at the Wodonga terminal station the No.1 and No.2 330/66/22 kV transformers tripped.
As a consequence of the protection operation the Dederang - Wodonga and the Jindera - Wodonga 330kV lines were offloaded.
51 MW of local load was lost.
At 0952 hrs the Dederang - Wodonga and the Jindera - Wodonga 330kV lines were restored to service.
AEMO did not instruct load shedding.
AEMO has 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
80181POWER SYSTEM EVENTS21/11/2020 01:09:19 AM
Correction - Non-credible contingency event - Vic region - 27/10/2020
AEMO ELECTRICITY MARKET NOTICE.
Correction to MN 80180 (date 21/11/2020, should read 20/11/2020)
Update - Non-credible contingency event - Vic region - 27/10/2020
Refer AEMO ELECTRICITY MARKET NOTICE MN79309
At 1022 hrs 27/10/2020 the Newport D Power Station No 2 220 kV Busbar tripped.
At 1019 hrs 20/11/2020 the Newport D Power Station No 2 220 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
Correction to MN 80180 (date 21/11/2020, should read 20/11/2020)
Update - Non-credible contingency event - Vic region - 27/10/2020
Refer AEMO ELECTRICITY MARKET NOTICE MN79309
At 1022 hrs 27/10/2020 the Newport D Power Station No 2 220 kV Busbar tripped.
At 1019 hrs 20/11/2020 the Newport D Power Station No 2 220 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
80180POWER SYSTEM EVENTS21/11/2020 01:03:53 AM
Update - Non-credible contingency event - Vic region - 27/10/2020
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - Vic region - 27/10/2020
Refer AEMO ELECTRICITY MARKET NOTICE MN79309
At 1022 hrs 27/10/2020 the Newport D Power Station No 2 220 kV Busbar tripped.
At 1019 hrs 21/11/2020 the Newport D Power Station No 2 220 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
Update - Non-credible contingency event - Vic region - 27/10/2020
Refer AEMO ELECTRICITY MARKET NOTICE MN79309
At 1022 hrs 27/10/2020 the Newport D Power Station No 2 220 kV Busbar tripped.
At 1019 hrs 21/11/2020 the Newport D Power Station No 2 220 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
79810POWER SYSTEM EVENTS11/11/2020 12:11:06 PM
Non-credible contingency event - Victoria region - 11/11/2020
AEMO ELECTRICITY MARKET NOTICE.
Update Non-credible contingency event - Victoria region - 11/11/2020
Refer AEMO Electricity Market Notice 79806
At 0333 hrs the Heywood - Mortlake tee APD No2 500 kV Line tripped at the Heywood end only.
The Heywood - Mortlake tee APD No2 500 kV Line has been 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.
Manager NEM Real Time Operations
Update Non-credible contingency event - Victoria region - 11/11/2020
Refer AEMO Electricity Market Notice 79806
At 0333 hrs the Heywood - Mortlake tee APD No2 500 kV Line tripped at the Heywood end only.
The Heywood - Mortlake tee APD No2 500 kV Line has been 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.
Manager NEM Real Time Operations
79806POWER SYSTEM EVENTS11/11/2020 09:34:54 AM
Non-credible contingency event - Victoria region - 11/11/2020
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Victoria region - 11/11/2020
At 0333 hrs the Heywood - Mortlake tee APD No2 500 kV Line tripped at the Heywood 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 being investigated.
Manager NEM Real Time Operations
Non-credible contingency event - Victoria region - 11/11/2020
At 0333 hrs the Heywood - Mortlake tee APD No2 500 kV Line tripped at the Heywood 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 being investigated.
Manager NEM Real Time Operations
79496POWER SYSTEM EVENTS31/10/2020 12:29:01 PM
Non-credible contingency event - Tas region - 31/10/2020
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Tas region - 31/10/2020
At 1115 hrs the Chapel St - Gordon Nos 1 and 2 220kV Lines and the Gordon Power Station 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.
Manager NEM Real Time Operations
Non-credible contingency event - Tas region - 31/10/2020
At 1115 hrs the Chapel St - Gordon Nos 1 and 2 220kV Lines and the Gordon Power Station 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.
Manager NEM Real Time Operations
79309POWER SYSTEM EVENTS27/10/2020 11:38:38 AM
Non-credible contingency event - Vic region - 27/10/2020
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Vic region - 27/10/2020
At 1022 hrs the Newport D Power Station No 2 220 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 is not known at this stage.
Manager NEM Real Time Operations
Non-credible contingency event - Vic region - 27/10/2020
At 1022 hrs the Newport D Power Station No 2 220 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 is not known at this stage.
Manager NEM Real Time Operations
79139POWER SYSTEM EVENTS23/10/2020 05:39:11 PM
Update - Non-credible contingency event - SA region - 23/10/2020
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - SA region - 23/10/2020
At 1442 hrs the Davenport - Bungama 275 kV Line and the East 275 kV Busbar at Davenport tripped.
At 1633 hrs The Davenport East 275 kV Busbar was returned to service. The Davenport - Bungama 275 kV line remains out of 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.
Manager NEM Real Time Operations
Update - Non-credible contingency event - SA region - 23/10/2020
At 1442 hrs the Davenport - Bungama 275 kV Line and the East 275 kV Busbar at Davenport tripped.
At 1633 hrs The Davenport East 275 kV Busbar was returned to service. The Davenport - Bungama 275 kV line remains out of 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.
Manager NEM Real Time Operations
79126POWER SYSTEM EVENTS23/10/2020 03:07:49 PM
Non-credible contingency event - SA region - 23/10/2020
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - SA region - 23/10/2020
At 1442 hrs the Davenport - Bungama 275 kV Line and the East 275 kV Busbar at Davenport 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 - SA region - 23/10/2020
At 1442 hrs the Davenport - Bungama 275 kV Line and the East 275 kV Busbar at Davenport 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