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66477POWER SYSTEM EVENTS19/01/2019 07:55:51 PM
Non-Credible Contingency Event - NSW Region - 19 Jan 2019
AEMO ELECTRICITY MARKET NOTICE.
Non-Credible Contingency Event - NSW Region - 19 Jan 2019
At 1938 hrs the Armidale - Tamworth 85 330kV Line tripped at Tamworth end only and the Armidale - Coffs Harbour 96C 132 kV Line tripped.
Both Lines auto reclosed sucessfully.
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 - 19 Jan 2019
At 1938 hrs the Armidale - Tamworth 85 330kV Line tripped at Tamworth end only and the Armidale - Coffs Harbour 96C 132 kV Line tripped.
Both Lines auto reclosed sucessfully.
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
66335POWER SYSTEM EVENTS13/01/2019 06:41:26 AM
Update - Non-credible contingency event - Qld region - 12/01/2019
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - Qld region - 12/01/2019
Refer AEMO ELECTRICITY MARKET NOTICE MN66334
At 0630 hrs 13/01/2019 the Innisfail No2 132kV 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 - Qld region - 12/01/2019
Refer AEMO ELECTRICITY MARKET NOTICE MN66334
At 0630 hrs 13/01/2019 the Innisfail No2 132kV 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
66334POWER SYSTEM EVENTS12/01/2019 11:51:52 PM
Non-credible contingency event - QLD region - 12/01/2019
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - QLD region - 12/01/2019
At 2327 hrs the Innisfail No2 132 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 - QLD region - 12/01/2019
At 2327 hrs the Innisfail No2 132 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
66326POWER SYSTEM EVENTS11/01/2019 09:59:27 AM
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event: Blanche - Snuggery 132 kV line, the Blanche - Mt Gambier 132 kV line and 132 kV CB 6009 at Mt Gambier
AEMO ELECTRICITY MARKET NOTICE
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. Accordingly its classification has reverted to a non-credible contingency event.
Region: SA1
Lines: Blanche - Snuggery 132 kV line, the Blanche - Mt Gambier 132 kV line and 132 kV CB 6009 at Mt Gambier
Cancellation time: 11/01/2019 10:00 hrs
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 66025
Manager NEM Real Time Operations
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. Accordingly its classification has reverted to a non-credible contingency event.
Region: SA1
Lines: Blanche - Snuggery 132 kV line, the Blanche - Mt Gambier 132 kV line and 132 kV CB 6009 at Mt Gambier
Cancellation time: 11/01/2019 10:00 hrs
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 66025
Manager NEM Real Time Operations
66312POWER SYSTEM EVENTS10/01/2019 01:52:36 PM
Update - Non-credible contingency event - Qld region - 09/01/2019
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - Qld region - 09/01/2019
Refer AEMO Electricity Market Notices 66304 and 66305
At 2133 hrs 09/01/2019 the following plant operated:
Strathmore No 1 SVC tripped,
Strathmore - Clare South (7208) 132 kV Line tripped and auto reclosed.
Collinsville North - Clare South Tee King Creek (7128) 132 kV Line tripped and auto reclosed.
The cause of this non credible contingency has been identified.
The SVC tripped on an unrelated issue. The TNSP advised this issue is unlikely to recur.
The two Transmission lines Strathmore - Clare Sth (7208) and Collinsville Nth - Clare Sth Tee King Creek (7128) tripped due lightning.
AEMO has therefore reclassified Strathmore - Clare Sth (7208) and Collinsville Nth - Clare Sth Tee King Creek (7128) 132 kV lines as a credible contingency due to lightning until further notice.
Manager NEM Real Time Operations
Update - Non-credible contingency event - Qld region - 09/01/2019
Refer AEMO Electricity Market Notices 66304 and 66305
At 2133 hrs 09/01/2019 the following plant operated:
Strathmore No 1 SVC tripped,
Strathmore - Clare South (7208) 132 kV Line tripped and auto reclosed.
Collinsville North - Clare South Tee King Creek (7128) 132 kV Line tripped and auto reclosed.
The cause of this non credible contingency has been identified.
The SVC tripped on an unrelated issue. The TNSP advised this issue is unlikely to recur.
The two Transmission lines Strathmore - Clare Sth (7208) and Collinsville Nth - Clare Sth Tee King Creek (7128) tripped due lightning.
AEMO has therefore reclassified Strathmore - Clare Sth (7208) and Collinsville Nth - Clare Sth Tee King Creek (7128) 132 kV lines as a credible contingency due to lightning until further notice.
Manager NEM Real Time Operations
66305POWER SYSTEM EVENTS09/01/2019 11:17:06 PM
Update - Non-credible contingency event - Qld region - 09/01/2019
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - Qld region - 09/01/2019
Refer AEMO ELECTRICITY MARKET NOTICE 66304
At 2133 hrs the Strathmore - Clare Sth (7208) 132 kV Line and the Collinsville Nth - Clare Sth Tee King Creek (7128) 132 kV Line tripped.
The cause of this non credible contingency event is still under investigation.
AEMO is not satisfied that this non credible event is unlikely to re-occur.
AEMO has therefore reclassified this event as a credible contingency event until further notice.
Manager NEM Real Time Operations
Update - Non-credible contingency event - Qld region - 09/01/2019
Refer AEMO ELECTRICITY MARKET NOTICE 66304
At 2133 hrs the Strathmore - Clare Sth (7208) 132 kV Line and the Collinsville Nth - Clare Sth Tee King Creek (7128) 132 kV Line tripped.
The cause of this non credible contingency event is still under investigation.
AEMO is not satisfied that this non credible event is unlikely to re-occur.
AEMO has therefore reclassified this event as a credible contingency event until further notice.
Manager NEM Real Time Operations
66304POWER SYSTEM EVENTS09/01/2019 10:18:57 PM
Non-credible contingency event - Qld region - 09/01/2019
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Qld region - 09/01/2019
At 2133 hrs the following plant operated:
Strathmore No 1 SVC tripped,
Strathmore - Clare South (7208) 132 kV Line tripped and auto reclosed
Collinsville North - Clare South Tee King Creek (7128) 132 kV Line tripped and auto reclosed
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 - Qld region - 09/01/2019
At 2133 hrs the following plant operated:
Strathmore No 1 SVC tripped,
Strathmore - Clare South (7208) 132 kV Line tripped and auto reclosed
Collinsville North - Clare South Tee King Creek (7128) 132 kV Line tripped and auto reclosed
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
66263POWER SYSTEM EVENTS07/01/2019 05:06:38 PM
Update - Non-credible contingency event - Qld region - 07/01/2019
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - Qld region - 07/01/2019
Refer AEMO ELECTRICITY MARKET NOTICE 66262
At 1510 hrs the Woree No1 132 kV 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 - 07/01/2019
Refer AEMO ELECTRICITY MARKET NOTICE 66262
At 1510 hrs the Woree No1 132 kV 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
66262POWER SYSTEM EVENTS07/01/2019 12:03:20 PM
Non-credible contingency event - Qld region - 07/01/2019
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Qld region - 07/01/2019
At 1150 hrs the Woree No 1 132 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 is not known at this stage.
Manager NEM Real Time Operations
Non-credible contingency event - Qld region - 07/01/2019
At 1150 hrs the Woree No 1 132 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 is not known at this stage.
Manager NEM Real Time Operations