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75721INTER-REGIONAL TRANSFER17/05/2020 03:09:30 AM
Inter-regional transfer limit variation: Hazelwood - South Morang No 2 500 kV Line (VIC) - Voltage Control
AEMO ELECTRICITY MARKET NOTICE
The Hazelwood - South Morang No 2 500 kV Line has been de-energised to manage voltages in the Victoria region.
The following constraint set was invoked at 0255 hrs 17/05/2020
V-HWSM
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
Manager NEM Real Time Operations
The Hazelwood - South Morang No 2 500 kV Line has been de-energised to manage voltages in the Victoria region.
The following constraint set was invoked at 0255 hrs 17/05/2020
V-HWSM
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
Manager NEM Real Time Operations
75720NON-CONFORMANCE15/05/2020 08:40:17 PM
NON-CONFORMANCE Region NSW1 Friday, 15 May 2020
AEMO ELECTRICITY MARKET NOTICE
NON-CONFORMANCE NSW1 Region Friday, 15 May 2020
AEMO declared a schedule generating unit non-conforming
Unit: VP5
Duration: 15/05/2020 20:30 to 15/05/2020 20:40
Amount: -21 MW
Constraint: NC-N_VP5
Auto-generated on behalf of Manager NEM Real Time Operations
NON-CONFORMANCE NSW1 Region Friday, 15 May 2020
AEMO declared a schedule generating unit non-conforming
Unit: VP5
Duration: 15/05/2020 20:30 to 15/05/2020 20:40
Amount: -21 MW
Constraint: NC-N_VP5
Auto-generated on behalf of Manager NEM Real Time Operations
75719RECLASSIFY CONTINGENCY14/05/2020 04:41:05 PM
Cancellation of a Non-Credible Contingency Event: Bulli Creek - Dumaresq 8L 330KV line and Bulli Creek - Dumaresq 8M 330KV line in QLD1 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: QLD1
Lines: Bulli Creek - Dumaresq 8L 330KV and Bulli Creek - Dumaresq 8M 330KV
Cancellation time: 14/05/2020 16:41
Constraint set(s) revoked:
I-QNI_ONE_PHASE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NSW1-QLD1
Refer AEMO Electricity Market Notice 75718
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: QLD1
Lines: Bulli Creek - Dumaresq 8L 330KV and Bulli Creek - Dumaresq 8M 330KV
Cancellation time: 14/05/2020 16:41
Constraint set(s) revoked:
I-QNI_ONE_PHASE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NSW1-QLD1
Refer AEMO Electricity Market Notice 75718
Auto-generated on behalf of Manager NEM Real Time Operations
75718RECLASSIFY CONTINGENCY14/05/2020 03:05:34 PM
Reclassification of a Non-Credible Contingency Event: Bulli Creek - Dumaresq 8L 330KV line and Bulli Creek - Dumaresq 8M 330KV line in QLD1 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: QLD1
Lines: Bulli Creek - Dumaresq 8L 330KV and Bulli Creek - Dumaresq 8M 330KV
Duration: 14/05/2020 15:05 until further notice
Constraint set(s) invoked:
I-QNI_ONE_PHASE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NSW1-QLD1
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: QLD1
Lines: Bulli Creek - Dumaresq 8L 330KV and Bulli Creek - Dumaresq 8M 330KV
Duration: 14/05/2020 15:05 until further notice
Constraint set(s) invoked:
I-QNI_ONE_PHASE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NSW1-QLD1
Auto-generated on behalf of Manager NEM Real Time Operations
75717POWER SYSTEM EVENTS14/05/2020 09:12:55 AM
Update - Non-credible contingency event - NSW Region - 14/05/2020
AEMO ELECTRICITY MARKET NOTICE.
Refer AEMO ELECTRICITY MARKET NOTICE MN 75716
At 0822 hrs the Burrinjuck 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
Refer AEMO ELECTRICITY MARKET NOTICE MN 75716
At 0822 hrs the Burrinjuck 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
75716POWER SYSTEM EVENTS14/05/2020 05:25:16 AM
Non-credible contingency event - NSW Region - 14/05/2020
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - NSW Region - 14/05/2020
At 0439 hrs the Burrinjuck 132 kV bus tripped.
With a pre-existing outage of the Gadara - Wagga 993 132 kV line, the Tumut 132 substation, the Gadara substation and the Blowering power station were disconnected.
AEMO estimates 60 MW of local load lost.
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.
Constraint set N-BLOWERNG_ZERO invoked.
Manager NEM Real Time Operations
Non-credible contingency event - NSW Region - 14/05/2020
At 0439 hrs the Burrinjuck 132 kV bus tripped.
With a pre-existing outage of the Gadara - Wagga 993 132 kV line, the Tumut 132 substation, the Gadara substation and the Blowering power station were disconnected.
AEMO estimates 60 MW of local load lost.
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.
Constraint set N-BLOWERNG_ZERO invoked.
Manager NEM Real Time Operations
75715RECLASSIFY CONTINGENCY13/05/2020 01:47:43 PM
Cancellation - Reclassification of a Non Credible Contingency Event: South East No. 2 275/132 kV Transformer and both the South East No.1 and No.2 275 kV SVCs.
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 equipment is no longer reasonably possible. Accordingly, its classification has reverted to a non-credible contingency event.
Region: SA1
Equipment: South East No. 2 275/132 kV Transformer, South East SVC 1 and SVC 2
Cancellation time: 13/05/2020 13:45
Constraint set(s) revoked: NONE
Refer AEMO Electricity Market Notice 75714
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 equipment is no longer reasonably possible. Accordingly, its classification has reverted to a non-credible contingency event.
Region: SA1
Equipment: South East No. 2 275/132 kV Transformer, South East SVC 1 and SVC 2
Cancellation time: 13/05/2020 13:45
Constraint set(s) revoked: NONE
Refer AEMO Electricity Market Notice 75714
Manager NEM Real Time Operations
75714RECLASSIFY CONTINGENCY13/05/2020 09:11:14 AM
Reclassification of a Non Credible Contingency Event: South East No. 2 275/132 kV Transformer and both the South East No.1 and No.2 275 kV SVCs.
AEMO ELECTRICITY MARKET NOTICE
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event. AEMO considers the simultaneous trip of the following equipment to now be more likely and reasonably possible. Accordingly, AEMO has reclassified it as a credible contingency event.
Region: SA1
Equipment: South East No. 2 275/132 kV Transformer, South East SVC 1 and SVC 2
Duration: 13/05/2020 08:11 until further notice
Constraint set(s) invoked: NONE
Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event. AEMO considers the simultaneous trip of the following equipment to now be more likely and reasonably possible. Accordingly, AEMO has reclassified it as a credible contingency event.
Region: SA1
Equipment: South East No. 2 275/132 kV Transformer, South East SVC 1 and SVC 2
Duration: 13/05/2020 08:11 until further notice
Constraint set(s) invoked: NONE
Manager NEM Real Time Operations
75713MARKET SYSTEMS13/05/2020 08:58:55 AM
CHG0059256:Planned System Outage on Gas Short Term Trading Market (STTM)
Market Notice
Change Number: CHG0059256
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Short Term Trading Market
Change Title: Planned System Outage on Gas Short Term Trading Market (STTM)
Change Start Date & Time: 19/05/2020 18:00:00 AEST
Change End Date & Time: 19/05/2020 22:30:00 AEST
Outage Start Date & Time: 19/05/2020 18:30:00 AEST
Outage End Date & Time: 19/05/2020 22:30:00 AEST
Change Description:
Production Short Term Trading Market System (STTM) planned scheduled maintenance activities
Environment: Production
Participant Impact and Requirements:
The AEMO Gas Short Term Trading Market Systems will be unavailable for the duration of the outage.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Change Number: CHG0059256
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Short Term Trading Market
Change Title: Planned System Outage on Gas Short Term Trading Market (STTM)
Change Start Date & Time: 19/05/2020 18:00:00 AEST
Change End Date & Time: 19/05/2020 22:30:00 AEST
Outage Start Date & Time: 19/05/2020 18:30:00 AEST
Outage End Date & Time: 19/05/2020 22:30:00 AEST
Change Description:
Production Short Term Trading Market System (STTM) planned scheduled maintenance activities
Environment: Production
Participant Impact and Requirements:
The AEMO Gas Short Term Trading Market Systems will be unavailable for the duration of the outage.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.