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57481POWER SYSTEM EVENTS13/02/2017 04:21:14 AM
Non-credible contingency event - Qld region - Monday, 11 February 2017.
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - Qld region - Monday, 11 February 2017.
At 0340 hrs at H12 Mt England the following lines have tripped and remain out of service,
the Wivenhoe PS 823 and 824 275 kV lines,
the South Pine 825 275 kV line, and
the Tarong 8812 275 kV line which tripped and has auto re-closed.
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 - Monday, 11 February 2017.
At 0340 hrs at H12 Mt England the following lines have tripped and remain out of service,
the Wivenhoe PS 823 and 824 275 kV lines,
the South Pine 825 275 kV line, and
the Tarong 8812 275 kV line which tripped and has auto re-closed.
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
57439POWER SYSTEM EVENTS11/02/2017 10:35:11 PM
Non-credible contingency event - NSW region - Saturday, 11 February 2017
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - NSW region - Saturday, 11 February 2017
At 2122 hrs the Wagga 330 kV A Busbar and
the 051 Wagga - Lower Tumut 330 kV transmission line,
the 63 Wagga - Darlington Pt. 330 kV transmission line
the 64 LowerTumut - Upper Tumut 330 kV transmission line
the 66 Murray - LowerTumut 330 kV transmission line
tripped.
The X5 220 kV line and
07 Lower Tumut - Canberra 330 kV lines deloaded.
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 - Saturday, 11 February 2017
At 2122 hrs the Wagga 330 kV A Busbar and
the 051 Wagga - Lower Tumut 330 kV transmission line,
the 63 Wagga - Darlington Pt. 330 kV transmission line
the 64 LowerTumut - Upper Tumut 330 kV transmission line
the 66 Murray - LowerTumut 330 kV transmission line
tripped.
The X5 220 kV line and
07 Lower Tumut - Canberra 330 kV lines deloaded.
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
57352POWER SYSTEM EVENTS09/02/2017 10:10:29 PM
Update - Non-credible contingency event - NSW region - Thursday, 9 February 2017
AEMO ELECTRICITY MARKET NOTICE
Update - Non-credible contingency event - NSW region - Thursday, 9 February 2017
Refer AEMO Electricity Market Notice 57351
At 1943 hrs the Munmorah 330 kV Main Busbar tripped and the Munmorah -Tuggerah 2M 330 kV transmission line opened at Munmorah.
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 non credible contingency.
Manager NEM Real Time Operations
Update - Non-credible contingency event - NSW region - Thursday, 9 February 2017
Refer AEMO Electricity Market Notice 57351
At 1943 hrs the Munmorah 330 kV Main Busbar tripped and the Munmorah -Tuggerah 2M 330 kV transmission line opened at Munmorah.
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 non credible contingency.
Manager NEM Real Time Operations
57351POWER SYSTEM EVENTS09/02/2017 09:32:07 PM
Non-credible contingency event - NSW region - Thursday, 9 February 2017
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - NSW region - Thursday, 9 February 2017
At 1943 hrs the Munmorah 330 kV Main Busbar tripped and the Munmorah -Tuggerah 2M 330 kV transmission line opened at Munmorah.
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 - Thursday, 9 February 2017
At 1943 hrs the Munmorah 330 kV Main Busbar tripped and the Munmorah -Tuggerah 2M 330 kV transmission line opened at Munmorah.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
56990POWER SYSTEM EVENTS23/01/2017 02:38:07 PM
Update - Non-credible contingency event - Vic region - 23/01/17
AEMO ELECTRICITY MARKET NOTICE
Update - Non-credible contingency event - Vic region - 23/01/17
Update to MN 56988
At Heywood terminal station the SESS No2 Line /M2 Transformer 275kV circuit breaker opened automatically at 0731 hrs. This off loaded the HYTS 500/275 kV M2 transformer.
At 1425 hrs the SESS No2 Line /M2 Transformer 275kV circuit breaker at Heywood terminal station 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.
The following constraint set were revoked at 1435 hrs.
S-X_BC_CP
V-HYTX_M12
The Constraint Sets contain equations with the following interconnectors on the LHS.
V-S-MNSP1
V-SA
Manager NEM Real Time Operations
Update - Non-credible contingency event - Vic region - 23/01/17
Update to MN 56988
At Heywood terminal station the SESS No2 Line /M2 Transformer 275kV circuit breaker opened automatically at 0731 hrs. This off loaded the HYTS 500/275 kV M2 transformer.
At 1425 hrs the SESS No2 Line /M2 Transformer 275kV circuit breaker at Heywood terminal station 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.
The following constraint set were revoked at 1435 hrs.
S-X_BC_CP
V-HYTX_M12
The Constraint Sets contain equations with the following interconnectors on the LHS.
V-S-MNSP1
V-SA
Manager NEM Real Time Operations
56988POWER SYSTEM EVENTS23/01/2017 08:44:03 AM
Non-credible contingency event - Vic region - 23/01/17
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - Vic region - 23/01/17
At 0731 hrs at Heywood 500kV terminal station the SESS No2 Line /M2 transformer CB 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.
Refer to AEMO Network Outage Scheduler (NOS) for further details.
Manager NEM Real Time Operations
Non-credible contingency event - Vic region - 23/01/17
At 0731 hrs at Heywood 500kV terminal station the SESS No2 Line /M2 transformer CB 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.
Refer to AEMO Network Outage Scheduler (NOS) for further details.
Manager NEM Real Time Operations
56484POWER SYSTEM EVENTS28/12/2016 02:37:51 PM
Non-credible contingency event - New South Wales region
AEMO ELECTRICITY MARKET NOTICE
Non-credible contingency event - New South Wales region
At 1354 hrs 28/12/2016 the 96 Newcastle to Waratah West 330 kV line tripped and automatically reclosed at the Newcastle 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 not known at this stage.
Manager NEM Real Time Operations
Non-credible contingency event - New South Wales region
At 1354 hrs 28/12/2016 the 96 Newcastle to Waratah West 330 kV line tripped and automatically reclosed at the Newcastle 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 not known at this stage.
Manager NEM Real Time Operations
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