Market Notices

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: TAS1

Lines: Palmerston - Hadspen 3 & 4 110kV and

Duration: 15/08/2024 17:11 until further notice

Constraint set(s) invoked:
T-HAPM_110_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NONE


Auto-generated on behalf of Manager NEM Real Time Operations

Change Number: CHG0095221

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal

Service/ Component: Gas Hub
Change Title: A production site transfer of the Electricity and Gas B2B Hub will be carried out to facilitate maintenance activities.

Change Start Date & Time: 25/08/2024 09:00:00 AEST
Change End Date & Time: 25/08/2024 17:00:00 AEST
Outage Start Date & Time: 25/08/2024 10:00:00 AEST
Outage End Date & Time: 25/08/2024 14:00:00 AEST

Environment: Production

Participant Impact and Requirements: The following impacts are expected during this maintenance:
- All access to the Electricity B2B Hub will be unavailable.
- All access to the Gas B2B Hub and all ebXML gateways (AEMOMIBB, AGNLGWY, LVI & VENCORP) will be unavailable. CATS and MDMT transactions for VIC/QLD will be delayed during the maintenance window.
- Users are not required to take any action due to this change, however will need to enact manual workarounds for the outage period.

Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.

Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any
planned/unplanned maintenance activities .

AEMO ELECTRICITY MARKET NOTICE.
AEMO considers the occurrence of a non-credible contingency event due to the widespread abnormal conditions advised in AEMO Electricity Market Notice 117660 is no longer reasonably possible and accordingly its classification has reverted to non-credible.

Cancellation time: 0845hrs 14/08/2024.

No constraints were invoked during this event

Manager NEM Real Time Operations

Change Number: CHG0091459
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MSATS - Consumer Administration and Transfer Solution(CATS)
Change Title: MSATS CATS & URM Site Transfer BNE to NOR Data Centre
Change Start Date & Time: 25/08/2024 10:00:00 AEST
Change End Date & Time: 25/08/2024 17:00:00 AEST
Outage Start Date & Time: 25/08/2024 11:15:00 AEST
Outage End Date & Time: 25/08/2024 11:45:00 AEST
Environment: Production
Participant Impact and Requirements: The change has some login outages that are below and will impact participants logging into the web portal for MSATS, OPDMS, NOS and EMMS production environments.
AEMO recommends users who need to use these AEMO services, login prior to the start of the outage and remain logged in.
NOTE: If you log out of this session, you will be unable to log back in until the completion of the outage.

A URM outage will occur between 11:15:00 - 11:45:00 AEST and have an expected outage duration of upto 20 minutes. During this time users will not be able to have new login sessions into TMM, OPDMS, NOS or EMMS WebPortal. Users who are already logged in will not be impacted.
The MSATS outage is 10:00:00 - 14:00:00 AEST.

Participants should be aware that:
o MSATS, Meter data processing, RM reports, B2B, B2M screen, NMI Discovery, CDR, CDP will not be available
o Production participant passwords will be retained.
o Users that log out and users that try to log in once the URM outage has commenced will only be able to log in after URM outage is complete. Users that are already logged in before the outage will not be impacted.
o Any password resets or new account creations completed during the URM outage window will need to be redone.
o MSATS and NOS Server FTP sessions will be disabled during outage - Wholesale MMS FTP will still be available.
o Plain English constraints will not be available during the URM outage timeframe via the EMMS web portal.

AEMO ELECTRICITY MARKET NOTICE.
AEMO has identified that a non-credible contingency event impacting the power system is more likely to occur and is considered reasonably possible because of the existence of widespread abnormal conditions namely Severe Space Weather Watch in the NEM regions.

AEMO has therefore reclassified the occurrence of a non-credible contingency event involving multiple plant due to these abnormal conditions as credible.

Duration: 2230 hrs 12/08/2024 until further notice

Need for further measures is being monitored and further measures may be implemented in line with the Power System Security Guidelines (SO_OP_3715).

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE.

Cancellation of the reclassification of a Non-Credible contingency event as a Credible contingency event. AEMO considers the simultaneous trip of the following elements is no longer reasonably possible. Accordingly, its classification has reverted to a non-credible contingency event.

Region: NSW

Elements: Liddell - Buronga - Balranald X3 220 kV line, Buronga - Red Cliffs 0X1 220 kV kV line and Buronga - Broken Hill X2 220 kV line.

Cancellation time: 1915 hrs

Refer AEMO Electricity Market Notice 117595

Manager NEM Real Time Operations

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: Collinsville North - Proserpine No.7125 132 kV and Collinsville North - Proserpine No.7126 132 kV

Cancellation time: 12/08/2024 14:34

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 117653

Auto-generated on behalf of Manager NEM Real Time Operations

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: Collinsville North - Proserpine No.7125 132 kV and Collinsville North - Proserpine No.7126 132 kV

Duration: 12/08/2024 13:30 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

Change Number: CHG0095134

Notification issued to: Market Notice

Notification Type: Completed

Change Type: Normal

Service/Component: Cohesity

Change Title: AEMO will be undertaking maintenance activities on the SMP system

Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600