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Non-credible contingency event - VIC region - 23/04/2024
Non-credible contingency event - VIC region - 23/04/2024
At 1056 hrs the MOPS 11 Gen TX 2 Bus 500kV CB and the Dundonnell WF tripped.
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 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
Inter-regional transfer limit variation - Para No 1 SVC - SA region - 23/04/2024
Inter-regional transfer limit variation - Para No 1 SVC - SA region - 23/04/2024
At 0837 hrs 23/04/2024 there was an unplanned outage of Para No 1 SVC.
Constraint set(s) invoked: S-PA_VC1
This constraint set(s) contains equations with the following interconnectors on the LHS.
V-SA,V-S-MNSP1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
CHG0088831 | Completed | Production | Identity Service Config Update in Production.
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Identity Service (IDS)
Change Title: Identity Service Config Update in Production.
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Inter-regional transfer limit variation -Liddell - Tomago 82 330kV Line - NSW region - 22/04/2024
Inter-regional transfer limit variation - Liddell - Tomago 82 330kV Line - NSW region - 22/04/2024
A planned outage of Liddell - Tomago 82 330kV Line in the NSW region was scheduled from 0600 hrs 03/04/2024 to 1700 hrs 22/04/2024.
The outage has been completed and Liddell - Tomago 82 330kV Line returned to service at 1450 hrs 22/04/2024
Constraint set(s) revoked: N-LDTM_82_OPEN
Manager NEM Real Time Operations
Cancellation of the reclassification of a Non-Credible contingency event: Farrell - Sheffield Nos 1 and 2 220kV Lines line in TAS due to Bushfire.
Cancellation of the reclassification of a Non-Credible contingency event as a Credible contingency event due to Bushfire. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any non credible event activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.
Region: TAS
Lines: Farrell - Sheffield Nos 1 and 2 220kV Lines
Cancellation time: 13:40 hrs 22/04/2024
Constraint set(s) revoked:
T-FASH_N-2_CP4_SB
T-NIL_WCP_CLOSE
Refer AEMO Electricity Market Notice 116269
Manager NEM Real Time Operations
Inter-regional transfer limit variation - Farrell - Sheffield Nos 1 and 2 220kV Lines - TAS region - 22/04/2024
Inter-regional transfer limit variation - Farrell - Sheffield Nos 1 and 2 220kV Lines - TAS region - 22/04/2024
At 1315 hrs 22/04/2024 there was an unplanned outage of Farrell - Sheffield Nos 1 and 2 220kV Lines.
The following constraint set(s) invoked at 1315 hrs 22/04/2024
T-X_FASH_C
This constraint set(s) contains equations with the following interconnectors on the LHS.
T-V-MNSP1
Refer to the AEMO Network Outage Scheduler for further information.
Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event: Farrell - Sheffield No. 1 and 2 220kV Lines in TAS due to Bushfire.
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Bushfire. 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: TAS
Lines: Farrell - Sheffield No. 1 and 2 220kV Lines
Duration:12:50 hrs 22/04/2024 until further notice
Constraint set(s) invoked:
T-NIL_WCP_CLOSE
F-FASH_N-2_CP4_SB
Manager NEM Real Time Operations
RESERVE NOTICE MT PASA PUBLICATION 23 April 2024
-- April 2025 - April 2026 in New South Wales.
AEMO declares low reserve conditions in accordance with clause 4.8.4 of the National Electricity Rules for the following region(s) and periods:
-- November 2025 - March 2026 in New South Wales when forecast demand exceeds supply under some circumstances.
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 AEMO intervention.
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 116136 published on 16 April 2024.
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
Forecasting
AEMO
CHG0088138 | Completed | Production | Brisbane MarketNet Firewall Refresh
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Firewall
Change Title: Brisbane MarketNet Firewall Refresh
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.