Market Notices

Change Number: CHG0088831

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.

AEMO ELECTRICITY MARKET NOTICE

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

AEMO ELECTRICITY MARKET NOTICE.

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

AEMO ELECTRICITY MARKET NOTICE

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

AEMO ELECTRICITY MARKET NOTICE.

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

The MTPASA result published on 23 April 2024 identifies Low Reserve Conditions as annual unserved energy exceeds the Reliability Standard between:
-- 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

Change Number: CHG0088138

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.

AEMO ELECTRICITY MARKET NOTICE

Cancellation - AEMO Intervention Event - Intervention trading intervals - Direction SA region 21/04/2024

Refer Market Notice 116232

The AEMO Intervention Event and all associated directions are cancelled from 1400 hrs 22/04/2024

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE.

Direction - SA region 22/04/2024

In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a).

The direction was necessary to maintain the power system in a secure operating state.

AEMO may issue or revoke additional directions in order to meet the current requirement, unless sufficient market response is provided. A further market notice will be issued when all directions related to this requirement have been cancelled.

The issue of the direction commences an AEMO intervention event. AEMO declares all trading intervals during the event to be intervention trading intervals, commencing from the interval ending 1205 hrs on 22/04/2024.

Intervention pricing does not apply to this AEMO intervention event.

Manager NEM Real Time Operations