Filter by:
Filter by category
Filter by Date
From
To
76290RECLASSIFY CONTINGENCY13/07/2020 11:11:04 AM
Cancellation - Reclassification of a Non Credible Contingency Event: Loss of multiple generating units Vic region 03/07/2020
AEMO ELECTRICITY MARKET NOTICE
Cancellation - Reclassification of a Non Credible Contingency Event: Loss of multiple generating units Vic region - 03/07/2020
Refer to MN 76173
Based on advice received from Energy Australia on the existence of an abnormal condition, AEMO now cancels the reclassification of the simultaneous loss of Yallourn W No.1, No.3 and No.4 generating units as a credible contingency event.
The nature of the abnormal condition was such that the concurrent loss of these three generating units was likely, in the event of a network fault close to Yallourn W power station.
The following constraint was invoked from 1900 hrs 03/07/2020 to 1100 hrs 13/07/2020
V-YWPS_134_N-2
The constraint set contain equations with the following interconnectors on the LHS
T-V-MNSP1
V-S-MNSP1
VIC1-NSW1
Manager NEM Real Time Operations
Cancellation - Reclassification of a Non Credible Contingency Event: Loss of multiple generating units Vic region - 03/07/2020
Refer to MN 76173
Based on advice received from Energy Australia on the existence of an abnormal condition, AEMO now cancels the reclassification of the simultaneous loss of Yallourn W No.1, No.3 and No.4 generating units as a credible contingency event.
The nature of the abnormal condition was such that the concurrent loss of these three generating units was likely, in the event of a network fault close to Yallourn W power station.
The following constraint was invoked from 1900 hrs 03/07/2020 to 1100 hrs 13/07/2020
V-YWPS_134_N-2
The constraint set contain equations with the following interconnectors on the LHS
T-V-MNSP1
V-S-MNSP1
VIC1-NSW1
Manager NEM Real Time Operations
76289RECLASSIFY CONTINGENCY13/07/2020 11:12:06 AM
Reclassification of a Non Credible Contingency Event: Loss of multiple generating units - Vic region 13/07/2020
AEMO ELECTRICITY MARKET NOTICE
Reclassification of a Non Credible Contingency Event: Loss of multiple generating units - Vic region - 13/07/2020
Based on advice received from Energy Australia on the existence of an abnormal condition, AEMO has reclassified the simultaneous loss of Yallourn W No.1and No.3 generating units as a credible contingency event. Yallourn No.2 Unit and No.4 Unit are not affected by this abnormal condition.
The nature of the abnormal condition is such that the concurrent loss of these two generating units are likely, in the event of a network fault close to Yallourn W power station.
The following constraint was invoked at 1100 hrs 13/07/2020 :
V-YWPS_13_N-2
The constraint set contain equations with the following interconnectors on the LHS
T-V-MNSP1
V-S-MNSP1
VIC1-NSW1
Manager NEM Real Time Operations
Reclassification of a Non Credible Contingency Event: Loss of multiple generating units - Vic region - 13/07/2020
Based on advice received from Energy Australia on the existence of an abnormal condition, AEMO has reclassified the simultaneous loss of Yallourn W No.1and No.3 generating units as a credible contingency event. Yallourn No.2 Unit and No.4 Unit are not affected by this abnormal condition.
The nature of the abnormal condition is such that the concurrent loss of these two generating units are likely, in the event of a network fault close to Yallourn W power station.
The following constraint was invoked at 1100 hrs 13/07/2020 :
V-YWPS_13_N-2
The constraint set contain equations with the following interconnectors on the LHS
T-V-MNSP1
V-S-MNSP1
VIC1-NSW1
Manager NEM Real Time Operations
76288INTER-REGIONAL TRANSFER13/07/2020 05:50:21 AM
Cancellation - Inter-regional transfer limit variation: Hazelwood - South Morang No. 1 500 kV Line (Vic) - Voltage Control
AEMO ELECTRICITY MARKET NOTICE
Cancellation - Inter-regional transfer limit variation: Hazelwood - South Morang No. 1 500 kV Line (Vic) - Voltage Control
Refer AEMO Electricity Market Notice 76252
The Hazelwood - South Morang No.1 500 kV Line has been returned to service.
The following constraint set was revoked at 0550 hrs 13/07/2020
V-HWSM
The constraint set contains equations with the following interconnectors on the LHS.
T-V-MNSP1
V-S-MNSP1
V-SA
VIC1-NSW1
Manager NEM Real Time Operations
Cancellation - Inter-regional transfer limit variation: Hazelwood - South Morang No. 1 500 kV Line (Vic) - Voltage Control
Refer AEMO Electricity Market Notice 76252
The Hazelwood - South Morang No.1 500 kV Line has been returned to service.
The following constraint set was revoked at 0550 hrs 13/07/2020
V-HWSM
The constraint set contains equations with the following interconnectors on the LHS.
T-V-MNSP1
V-S-MNSP1
V-SA
VIC1-NSW1
Manager NEM Real Time Operations
76287INTER-REGIONAL TRANSFER13/07/2020 12:53:45 AM
Inter-regional transfer limit variation - Black Range No. 2 Series Capacitor - SA Region
AEMO ELECTRICITY MARKET NOTICE
Inter-regional transfer limit variation - Black Range No. 2 Series Capacitor - SA Region
At 0029 hrs 13/07/2020 there was an unplanned outage of the Black Range No.2 275 kV Series Capacitor.
The following constraint set was invoked from 0045 hrs
S-BC_CP
The constraint sets contain equations with the following interconnector on the LHS.
V-SA
V-S-MNSP1
See Network Outage Scheduler (NOS) for further details.
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Black Range No. 2 Series Capacitor - SA Region
At 0029 hrs 13/07/2020 there was an unplanned outage of the Black Range No.2 275 kV Series Capacitor.
The following constraint set was invoked from 0045 hrs
S-BC_CP
The constraint sets contain equations with the following interconnector on the LHS.
V-SA
V-S-MNSP1
See Network Outage Scheduler (NOS) for further details.
Manager NEM Real Time Operations
76286RECLASSIFY CONTINGENCY12/07/2020 08:43:55 PM
Cancellation of a Non-Credible Contingency Event: Bayswater - Mt Piper No.5A3 500kV line and Wollar - Mt Piper No.5A5 500kV line in NSW1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Cancellation time: 12/07/2020 20:43
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 76285
Auto-generated on behalf of Manager NEM Real Time Operations
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Cancellation time: 12/07/2020 20:43
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 76285
Auto-generated on behalf of Manager NEM Real Time Operations
76285RECLASSIFY CONTINGENCY12/07/2020 07:42:51 PM
Reclassification of a Non-Credible Contingency Event: Bayswater - Mt Piper No.5A3 500kV line and Wollar - Mt Piper No.5A5 500kV line in NSW1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Duration: 12/07/2020 19:42 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Duration: 12/07/2020 19:42 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
76284RECLASSIFY CONTINGENCY12/07/2020 06:08:55 PM
Cancellation of a Non-Credible Contingency Event: Bayswater - Mt Piper No.5A3 500kV line and Wollar - Mt Piper No.5A5 500kV line in NSW1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Cancellation time: 12/07/2020 18:08
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 76283
Auto-generated on behalf of Manager NEM Real Time Operations
Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Cancellation time: 12/07/2020 18:08
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 76283
Auto-generated on behalf of Manager NEM Real Time Operations
76283RECLASSIFY CONTINGENCY12/07/2020 03:06:05 PM
Reclassification of a Non-Credible Contingency Event: Bayswater - Mt Piper No.5A3 500kV line and Wollar - Mt Piper No.5A5 500kV line in NSW1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Duration: 12/07/2020 15:06 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: NSW1
Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV
Duration: 12/07/2020 15:06 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
76282INTER-REGIONAL TRANSFER12/07/2020 07:37:54 AM
Cancellation - Inter-regional transfer limit variation - Keilor A2, A3 and A4 500/220 kV transformers (Vic) - Voltage Control
AEMO ELECTRICITY MARKET NOTICE
The Keilor A2, A3 and A4 500/220 kV transformers have been restored in the Victoria region.
Refer to MN 76281
The following constraint set was revoked at 0655 hrs
V-X_HWSM_KTTX
The constraint set contains equations with the following interconnectors on the LHS.
T-V-MNSP
V-S-MNSP1
V-SA
VIC1-NSW1
Refer to AEMO Network Outage Scheduler (NOS) for further details
NEM Real Time Operations Manager
The Keilor A2, A3 and A4 500/220 kV transformers have been restored in the Victoria region.
Refer to MN 76281
The following constraint set was revoked at 0655 hrs
V-X_HWSM_KTTX
The constraint set contains equations with the following interconnectors on the LHS.
T-V-MNSP
V-S-MNSP1
V-SA
VIC1-NSW1
Refer to AEMO Network Outage Scheduler (NOS) for further details
NEM Real Time Operations Manager