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53976INTER-REGIONAL TRANSFER16/06/2016 07:54:58 AM
Inter-regional transfer limit variation Bungama - Davenport 275 kV Line (SA) - 16/06/2016
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation Bungama - Davenport 275 kV Line (SA) - 16/06/2016
At 0736 hrs, there was an unplanned outage of the Bungama - Davenport 275 kV Line.
The following constraint set was invoked from 1745 hrs.
S-BGDV
The constraint set contains equations with the following interconnector on the LHS.
V-S-MNSP1
See Network Outage Scheduler (NOS) for further details
Manager NEM Real Time Operations
Inter-regional transfer limit variation Bungama - Davenport 275 kV Line (SA) - 16/06/2016
At 0736 hrs, there was an unplanned outage of the Bungama - Davenport 275 kV Line.
The following constraint set was invoked from 1745 hrs.
S-BGDV
The constraint set contains equations with the following interconnector on the LHS.
V-S-MNSP1
See Network Outage Scheduler (NOS) for further details
Manager NEM Real Time Operations
53969INTER-REGIONAL TRANSFER15/06/2016 01:36:39 PM
Inter-regional transfer limit variation - Hazelwood - Cranbourne No. 4 500kV Transmission Line (Vic)
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Hazelwood - Cranbourne No. 4 500kV Transmission Line (Vic)
Hazelwood - Cranbourne No. 4 500kV Transmission Line has been returned to service early in the Vic region.
The following constraint sets were revoked at 1325 hrs.
V-HWCB4
The constraint sets contain equations with the following interconnectors on the LHS.
NSW-QLD1
VIC1-NSW1
V-SA
V-S-MNSP1
T-V-MNSP1
Refer to AEMO Network Outage Schedule for further details.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Hazelwood - Cranbourne No. 4 500kV Transmission Line (Vic)
Hazelwood - Cranbourne No. 4 500kV Transmission Line has been returned to service early in the Vic region.
The following constraint sets were revoked at 1325 hrs.
V-HWCB4
The constraint sets contain equations with the following interconnectors on the LHS.
NSW-QLD1
VIC1-NSW1
V-SA
V-S-MNSP1
T-V-MNSP1
Refer to AEMO Network Outage Schedule for further details.
Manager NEM Real Time Operations
53964RECLASSIFY CONTINGENCY14/06/2016 11:26:00 AM
Cancellation - Reclassification of the loss of Wagga 132kV B bus, the No2 and the No3 330/132kV transformers in NSW region.
AEMO ELECTRICITY MARKET NOTICE
Cancellation - Reclassification of the loss of Wagga 132 kV B bus, the No 2 and the No 3 330/132 kV transformers in NSW region - 14/06/2016.
Refer to Electricity Market Notice 53874 and 53888
Based on advice from the asset owner the circumstances that existed in relation to the tripping of the Wagga substation 132 kV B bus, the No2 and the No3 330/132 kV transformers have now been addressed
Therefore AEMO no longer considers the simultaneous trip of the Wagga substation 132 kV B bus, the No2 and the No3 330/132 kV transformers to be a credible contingency event from 1055 hrs 14/06/2016 .
Manager NEM Real Time Operations
Cancellation - Reclassification of the loss of Wagga 132 kV B bus, the No 2 and the No 3 330/132 kV transformers in NSW region - 14/06/2016.
Refer to Electricity Market Notice 53874 and 53888
Based on advice from the asset owner the circumstances that existed in relation to the tripping of the Wagga substation 132 kV B bus, the No2 and the No3 330/132 kV transformers have now been addressed
Therefore AEMO no longer considers the simultaneous trip of the Wagga substation 132 kV B bus, the No2 and the No3 330/132 kV transformers to be a credible contingency event from 1055 hrs 14/06/2016 .
Manager NEM Real Time Operations
53957RECLASSIFY CONTINGENCY13/06/2016 12:09:39 PM
Update - Reclassification of a Non-Credible Contingency Event in TAS Region
AEMO ELECTRICITY MARKET NOTICE
Update - Reclassification of a Non-Credible Contingency Event in TAS Region:
Trip of any Tasmanian Transmission Line and Basslink Interconnector for Basslink flow in the direction of Victoria to Tasmania
Refer to MN 47360 issued 19/12/2014 and MN 47855 issued 23/01/2015.
Advice provided to AEMO indicates that Basslink is unlikely to trip for 220 kV transmission faults close to George Town. As the George Town to Tamar Valley power station 220 kV lines are very short it is unlikely that Basslink will trip for a fault on these lines.
Based on this advice AEMO has reclassified the loss of any transmission line in Tasmania and Basslink Interconnector to be a credible contingency event for Basslink flow in the direction of Victoria to Tasmania only, except for faults on either of the two George Town to Pacific Aluminium 220 kV transmission lines or the George Town to Tamar Valley power station 220 kV transmission line, from 1151 hrs 13/06/2016 until further notice.
Manager NEM Real Time Operations
Update - Reclassification of a Non-Credible Contingency Event in TAS Region:
Trip of any Tasmanian Transmission Line and Basslink Interconnector for Basslink flow in the direction of Victoria to Tasmania
Refer to MN 47360 issued 19/12/2014 and MN 47855 issued 23/01/2015.
Advice provided to AEMO indicates that Basslink is unlikely to trip for 220 kV transmission faults close to George Town. As the George Town to Tamar Valley power station 220 kV lines are very short it is unlikely that Basslink will trip for a fault on these lines.
Based on this advice AEMO has reclassified the loss of any transmission line in Tasmania and Basslink Interconnector to be a credible contingency event for Basslink flow in the direction of Victoria to Tasmania only, except for faults on either of the two George Town to Pacific Aluminium 220 kV transmission lines or the George Town to Tamar Valley power station 220 kV transmission line, from 1151 hrs 13/06/2016 until further notice.
Manager NEM Real Time Operations
53888RECLASSIFY CONTINGENCY11/06/2016 05:15:46 PM
Reclassification of the loss of Wagga 132kV B bus, No2 and No3 transformer as a credible event 11 June 2016
AEMO ELECTRICITY MARKET NOTICE
Refer AEMO ELECTRICITY MARKET NOTICE 53874
At 0950 hrs on 11/06/16, the Wagga substation 132kV B bus, the No2 and the No3 330/132kV transformers tripped.
The cause of this non credible contingency event is not known at this stage.
AEMO is not satisfied that this non credible event is unlikely to re-occur.
AEMO therefore classifies this event as being a credible contingency event.
The No3 330/132kV transformer and the bus were placed on load from 1430hrs, the No2 330/132kV transformer remains de-energised.
Manager NEM Real Time Operations
Refer AEMO ELECTRICITY MARKET NOTICE 53874
At 0950 hrs on 11/06/16, the Wagga substation 132kV B bus, the No2 and the No3 330/132kV transformers tripped.
The cause of this non credible contingency event is not known at this stage.
AEMO is not satisfied that this non credible event is unlikely to re-occur.
AEMO therefore classifies this event as being a credible contingency event.
The No3 330/132kV transformer and the bus were placed on load from 1430hrs, the No2 330/132kV transformer remains de-energised.
Manager NEM Real Time Operations
53658INTER-REGIONAL TRANSFER06/06/2016 01:09:17 PM
nter-regional transfer limit variation - Tamworth Liddell (84) 330kV Transmission Line (NSW)
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Tamworth Liddell (84) 330kV Transmission Line (NSW)
Tamworth Liddell (84) 330kV Transmission Line has been returned to service early in the NSW region.
The following constraint sets were revoked at 1305 hrs.
F-N-LDTW_84
N-LDTW_84
The constraint sets contain equations with the following interconnectors on the LHS.
NSW-QLD1
N-Q-MNSP1
Refer to AEMO Network Outage Schedule for further details.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Tamworth Liddell (84) 330kV Transmission Line (NSW)
Tamworth Liddell (84) 330kV Transmission Line has been returned to service early in the NSW region.
The following constraint sets were revoked at 1305 hrs.
F-N-LDTW_84
N-LDTW_84
The constraint sets contain equations with the following interconnectors on the LHS.
NSW-QLD1
N-Q-MNSP1
Refer to AEMO Network Outage Schedule for further details.
Manager NEM Real Time Operations
53634INTER-REGIONAL TRANSFER06/06/2016 05:01:17 AM
Cancellation - Inter-regional transfer limit variation - Greenbank to Middle Ridge (8848) 275 kV Line (Qld) - Voltage Control - 6 June 2016
AEMO ELECTRICITY MARKET NOTICE
Cancellation - Inter-regional transfer limit variation - Greenbank to Middle Ridge (8848) 275 kV Line (Qld) - Voltage Control - 6 June 2016
Refer AEMO Electricity Market Notice 53629
The Greenbank to Middle Ridge (8848) 275 kV Line has been returned to service.
Constraint set Q-MRGB_8848_8849 revoked at XXXX hrs.
The constraint set contains equations with the following interconnectors on the LHS:
NSW1-QLD1
N-Q-MNSP1
Manager NEM Real Time Operations
Cancellation - Inter-regional transfer limit variation - Greenbank to Middle Ridge (8848) 275 kV Line (Qld) - Voltage Control - 6 June 2016
Refer AEMO Electricity Market Notice 53629
The Greenbank to Middle Ridge (8848) 275 kV Line has been returned to service.
Constraint set Q-MRGB_8848_8849 revoked at XXXX hrs.
The constraint set contains equations with the following interconnectors on the LHS:
NSW1-QLD1
N-Q-MNSP1
Manager NEM Real Time Operations
53629INTER-REGIONAL TRANSFER06/06/2016 01:27:49 AM
Inter-regional transfer limit variation - Greenbank to Middle Ridge (8848) 275 kV Line (Qld) - Voltage Control
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Greenbank to Middle Ridge (8848) 275 kV Line (Qld) - Voltage Control - 6 June 2016
The Greenbank to Middle Ridge (8848) 275 kV Line has been de-energised to manage voltages in the Qld region.
The following constraint set was invoked at 0125 hrs until further notice.
Q-MRGB_8848_8849
The constraint set contains equations with the following interconnectors on the LHS:
NSW1-QLD1
N-Q-MNSP1
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Greenbank to Middle Ridge (8848) 275 kV Line (Qld) - Voltage Control - 6 June 2016
The Greenbank to Middle Ridge (8848) 275 kV Line has been de-energised to manage voltages in the Qld region.
The following constraint set was invoked at 0125 hrs until further notice.
Q-MRGB_8848_8849
The constraint set contains equations with the following interconnectors on the LHS:
NSW1-QLD1
N-Q-MNSP1
Manager NEM Real Time Operations
53621INTER-REGIONAL TRANSFER05/06/2016 05:50:33 AM
Cancellation - Inter-regional transfer limit variation - Greenbank to Middle Ridge (8848) 275 kV Line (Qld) - Voltage Control - 5 June 2016
AEMO ELECTRICITY MARKET NOTICE
Cancellation - Inter-regional transfer limit variation - Greenbank to Middle Ridge (8848) 275 kV Line (Qld) - Voltage Control - 5 June 2016
Refer AEMO Electricity Market Notice 53620
The Greenbank to Middle Ridge (8848) 275 kV Line has been returned to service.
Constraint set Q-MRGB_8848_8849 revoked at 0550 hrs.
The constraint set contains equations with the following interconnectors on the LHS:
NSW-QLD1
N-Q-MNSP1
Manager NEM Real Time Operations
Cancellation - Inter-regional transfer limit variation - Greenbank to Middle Ridge (8848) 275 kV Line (Qld) - Voltage Control - 5 June 2016
Refer AEMO Electricity Market Notice 53620
The Greenbank to Middle Ridge (8848) 275 kV Line has been returned to service.
Constraint set Q-MRGB_8848_8849 revoked at 0550 hrs.
The constraint set contains equations with the following interconnectors on the LHS:
NSW-QLD1
N-Q-MNSP1
Manager NEM Real Time Operations