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77600CONSTRAINTS09/09/2020 11:37:10 AM
Update to Vic to NSW voltage collapse limit
AEMO ELECTRICITY MARKET NOTICE
Refer to market notice 63893
AEMO is currently revising the existing voltage collapse constraint equation for Victoria to NSW transfers for the simultaneous loss of all APD potlines. The existing equation requires a review for record low Victorian demands and high transfers to NSW. To reduce the instances of AEMO invoking discretionary limits while this review is being completed an offset of 250 MW will be applied to the existing constraint equation.
This change will occur at 1400 hrs 9th September 2020.
The following constraint equation will be modified:
V^^N_NIL_1
For further details on this new constraint equation please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
Refer to market notice 63893
AEMO is currently revising the existing voltage collapse constraint equation for Victoria to NSW transfers for the simultaneous loss of all APD potlines. The existing equation requires a review for record low Victorian demands and high transfers to NSW. To reduce the instances of AEMO invoking discretionary limits while this review is being completed an offset of 250 MW will be applied to the existing constraint equation.
This change will occur at 1400 hrs 9th September 2020.
The following constraint equation will be modified:
V^^N_NIL_1
For further details on this new constraint equation please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
77599MARKET SYSTEMS09/09/2020 10:01:20 AM
CHG0060857 : GSH - Planned System Outage - Gas Supply Hub Production Site
Change Number: CHG0060857
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Gas Supply Hub
Change Title: GSH - Planned System Outage - Gas Supply Hub Production Site
Change Start Date & Time: 17/09/2020 17:00:00 AEST
Change End Date & Time: 17/09/2020 19:30:00 AEST
Outage Start Date & Time: 17/09/2020 18:30:00 AEST
Outage End Date & Time: 17/09/2020 19:30:00 AEST
Change Description:
The Gas Supply Hub Production System is to be transferred to the alternate site to support maintenance activities.
Environment: Production
Participant Impact and Requirements:
All access to the Gas Supply Hub (Exchange Trading System) will be unavailable during the outage period. Access will be available outside this outage period.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Gas Supply Hub
Change Title: GSH - Planned System Outage - Gas Supply Hub Production Site
Change Start Date & Time: 17/09/2020 17:00:00 AEST
Change End Date & Time: 17/09/2020 19:30:00 AEST
Outage Start Date & Time: 17/09/2020 18:30:00 AEST
Outage End Date & Time: 17/09/2020 19:30:00 AEST
Change Description:
The Gas Supply Hub Production System is to be transferred to the alternate site to support maintenance activities.
Environment: Production
Participant Impact and Requirements:
All access to the Gas Supply Hub (Exchange Trading System) will be unavailable during the outage period. Access will be available outside this outage period.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
77598MARKET SYSTEMS09/09/2020 10:01:34 AM
CHG0060854 : Planned System Maintenance - Electricity MMS Production Transfer
Change Number: CHG0060854
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Electricity Market Management System
Change Title: Planned System Maintenance - Electricity MMS Production Transfer
Change Start Date & Time: 15/09/2020 10:00:00 AEST
Change End Date & Time: 15/09/2020 16:00:00 AEST
Outage Start Date & Time:
Outage End Date & Time:
Change Description:
EMMS Production Systems will be transferred to the alternative datacentre for maintenance activities.
Environment: Production
Participant Impact and Requirements:
The maintenance activity is not expected to have any impact on the production environment however this activity is not without risk and delays to dispatch cycles can occur.
If issues are occurring after the completion of the maintenance, please report these to the AEMO Support Hub.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Electricity Market Management System
Change Title: Planned System Maintenance - Electricity MMS Production Transfer
Change Start Date & Time: 15/09/2020 10:00:00 AEST
Change End Date & Time: 15/09/2020 16:00:00 AEST
Outage Start Date & Time:
Outage End Date & Time:
Change Description:
EMMS Production Systems will be transferred to the alternative datacentre for maintenance activities.
Environment: Production
Participant Impact and Requirements:
The maintenance activity is not expected to have any impact on the production environment however this activity is not without risk and delays to dispatch cycles can occur.
If issues are occurring after the completion of the maintenance, please report these to the AEMO Support Hub.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
77597MARKET SYSTEMS09/09/2020 10:01:56 AM
CHG0060950 : Planned System Maintenance - Electricity MMS PreProduction
Change Number: CHG0060950
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: EMMS - Data Store
Change Title: Planned System Maintenance - Electricity MMS PreProduction
Change Start Date & Time: 10/09/2020 12:00:00 AEST
Change End Date & Time: 10/09/2020 15:00:00 AEST
Outage Start Date & Time: 10/09/2020 12:00:00 AEST
Outage End Date & Time: 10/09/2020 13:00:00 AEST
Change Description:
Maintenance is performed on the EMMS PreProduction environment.
Environment: Pre-Production
Participant Impact and Requirements:
The maintenance activity is not expected to have any impact on the pre-production environment, and therefore if any issue is identified after the maintenance activity it should be reported to AEMO.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: EMMS - Data Store
Change Title: Planned System Maintenance - Electricity MMS PreProduction
Change Start Date & Time: 10/09/2020 12:00:00 AEST
Change End Date & Time: 10/09/2020 15:00:00 AEST
Outage Start Date & Time: 10/09/2020 12:00:00 AEST
Outage End Date & Time: 10/09/2020 13:00:00 AEST
Change Description:
Maintenance is performed on the EMMS PreProduction environment.
Environment: Pre-Production
Participant Impact and Requirements:
The maintenance activity is not expected to have any impact on the pre-production environment, and therefore if any issue is identified after the maintenance activity it should be reported to AEMO.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
77596RESERVE NOTICE08/09/2020 02:24:41 PM
RESERVE NOTICE MT PASA PUBLICATION 08 September 2020
The MTPASA result published on 08 September 2020 identifies no Low Reserve Conditions.
Please note that MTPASA informs the market of potential reliability issues to allow the market to respond in the first instance, potentially avoiding the need for any market intervention or direction from AEMO.
For further information, please refer to:
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data/Market-Management-System-MMS/Projected-Assessment-of-System-Adequacy
This notice supersedes Market Notice 77404 published on 01 September 2020.
Background
As part of a broader process of implementing the reliability standard, AEMO runs the Medium Term Projected Assessment of System Adequacy (MTPASA) process weekly to forecast expected unserved energy levels over a two year period. If the expected annual unserved energy exceeds the maximum level specified by the Reliability Standard, a Low Reserve Condition is identified.
For more information about how AEMO implements the reliability standard, please view the Reliability Standard Implementation Guidelines (RSIG) available on AEMO's website at
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Planning-and-forecasting/Reliability-Standard-Implementation-Guidelines
Forecasting
AEMO
Please note that MTPASA informs the market of potential reliability issues to allow the market to respond in the first instance, potentially avoiding the need for any market intervention or direction from AEMO.
For further information, please refer to:
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data/Market-Management-System-MMS/Projected-Assessment-of-System-Adequacy
This notice supersedes Market Notice 77404 published on 01 September 2020.
Background
As part of a broader process of implementing the reliability standard, AEMO runs the Medium Term Projected Assessment of System Adequacy (MTPASA) process weekly to forecast expected unserved energy levels over a two year period. If the expected annual unserved energy exceeds the maximum level specified by the Reliability Standard, a Low Reserve Condition is identified.
For more information about how AEMO implements the reliability standard, please view the Reliability Standard Implementation Guidelines (RSIG) available on AEMO's website at
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Planning-and-forecasting/Reliability-Standard-Implementation-Guidelines
Forecasting
AEMO
77595POWER SYSTEM EVENTS08/09/2020 10:27:22 AM
Update - Non-credible contingency event - Victoria region - 08/09/2020
AEMO ELECTRICITY MARKET NOTICE.
Refer AEMO ELECTRICITY MARKET NOTICE MN77594
At 1000 hrs the Wodonga No. 1 and No. 2 330kV/66kV transformers 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 MN77594
At 1000 hrs the Wodonga No. 1 and No. 2 330kV/66kV transformers 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
77594POWER SYSTEM EVENTS08/09/2020 09:29:54 AM
Non-credible contingency event - Victoria region - 08/09/2020
AEMO ELECTRICITY MARKET NOTICE.
At 0839 hrs the Wodonga No. 1 and No. 2 330 kV bus tripped which offloaded the Dederang - Wodonga 330 kV Line and the Wodonga - Jindera 330 kV Line.
At 0851 hrs the Wodonga No. 1 330 kV bus, the Dederang - Wodonga 330 kV Line and the Wodonga - Jindera 330 kV Line were returned to service.
At 0912 hrs the Wodonga No. 2 330 kV bus was returned to service. The Wodonga No. 1 and No. 2 330kV/66kV transformers remain out of service.
AEMO did not instruct load shedding.
It appears there was approximately 8 MW of load lost at Wodonga, however this amount has not been confirmed.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
At 0839 hrs the Wodonga No. 1 and No. 2 330 kV bus tripped which offloaded the Dederang - Wodonga 330 kV Line and the Wodonga - Jindera 330 kV Line.
At 0851 hrs the Wodonga No. 1 330 kV bus, the Dederang - Wodonga 330 kV Line and the Wodonga - Jindera 330 kV Line were returned to service.
At 0912 hrs the Wodonga No. 2 330 kV bus was returned to service. The Wodonga No. 1 and No. 2 330kV/66kV transformers remain out of service.
AEMO did not instruct load shedding.
It appears there was approximately 8 MW of load lost at Wodonga, however this amount has not been confirmed.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
77593MARKET INTERVENTION08/09/2020 05:55:55 AM
Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 06/09/2020
AEMO ELECTRICITY MARKET NOTICE
Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 06/09/2020
Refer Market Notice 77541
The AEMO Intervention Event and all associated directions are cancelled from 0600 hrs 08/09/2020
Manager NEM Real Time Operations
Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 06/09/2020
Refer Market Notice 77541
The AEMO Intervention Event and all associated directions are cancelled from 0600 hrs 08/09/2020
Manager NEM Real Time Operations
77590INTER-REGIONAL TRANSFER07/09/2020 07:48:35 PM
Cancellation - Inter -regional transfer limit variation - Constraint automation to Manage Power System Security in Vic Region - 01/06/2020
AEMO ELECTRICITY MARKET NOTICE
Cancellation - Inter -regional transfer limit variation - Constraint automation to Manage Power System Security in Vic Region - 07/09/2020
Refer AEMO Electricity Market Notice 77589
AEMO has revoked automated constraint sets
CA_SYDS_4E6887B6C at 1945 hrs
CA_SYDS_4E68866CCat 1945 hrs (set was invoked at 1920 hrs)
These constraint set contains equations with the following interconnector on the LHS;
V-S-MNSP1
Manager NEM Real Time Operations
Cancellation - Inter -regional transfer limit variation - Constraint automation to Manage Power System Security in Vic Region - 07/09/2020
Refer AEMO Electricity Market Notice 77589
AEMO has revoked automated constraint sets
CA_SYDS_4E6887B6C at 1945 hrs
CA_SYDS_4E68866CCat 1945 hrs (set was invoked at 1920 hrs)
These constraint set contains equations with the following interconnector on the LHS;
V-S-MNSP1
Manager NEM Real Time Operations