Market Notices

118421MINIMUM SYSTEM LOAD24/09/2024 02:54:54 PM

Minimum System Load 1 (MSL1) in the VIC Region on 28/09/2024

AEMO ELECTRICITY MARKET NOTICE

AEMO has detected that there is an elevated risk of insufficient demand to maintain a secure operating state in the Victorian region from 1100 hrs to 1400 hrs 28/09/2024.
Minimum regional demand is forecast to be 1638 MW at 1300 hrs, and the advisory threshold is:
- MSL1 - 1865 MW
- MSL2 - 1365 MW
- MSL3 - 865 MW

MSL events are forecast when forecast regional demand is less than the relevant MSL threshold. The forecast regional demand is below the MSL1 threshold.

Refer to NEM Data Dashboard to monitor demand levels: https://aemo.com.au/energy-systems/electricity/national-electricity-market-nem/data-nem/data-dashboard-nem

AEMO is seeking a market response.

An insufficient market response may require AEMO to take action or intervene to maintain power system security in Victoria. This may result in actions such as recalling network outages, the direction of scheduled production units, curtailment of non-scheduled production units, and/or a direction to maintain regional demand above required MSL threshold, in both Victoria and South Australia.

AEMO Operations
118416MARKET SYSTEMS24/09/2024 10:24:04 AM

CHG0098666:Telstra Melbourne Indial (03 9609 XXXX-XXXX)

Change Number: CHG0098666
Notification issued to: Market Notice
Notification Type: Cancelled
Change Type: Normal
Service/ Component: Cisco IP Phone
Change Title: Telco Outage Notification - Telstra Melbourne Indial (03 9609 XXXX-XXXX)
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600




118415MARKET SYSTEMS24/09/2024 10:22:22 AM

CHG0098678:Telstra Melbourne Indial (03 9609 XXXX-XXXX)

Change Number: CHG0098678
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Cisco IP Phone
Change Title: Telco Outage Notification - Telstra Melbourne Indial (03 9609 XXXX-XXXX)
Change Start Date & Time: 08/10/2024 00:00:00 AEST
Change End Date & Time: 08/10/2024 06:00:00 AEST
Outage Start Date & Time:
Outage End Date & Time:
Environment: Production
Participant Impact and Requirements: Outage Duration:
3 x 15 Minutes during the window

Impacts:
Reduced redundancy for Inbound and Outbound Calls (automatically rerouted via Perth).
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 .
118406MARKET SYSTEMS23/09/2024 03:44:02 PM

CHG0098666 | Production | Telco Outage Notification - Telstra Melbourne Indial (03 9609 XXXX-XXXX)

Change Number: CHG0098666

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: Cisco IP Phone

Change Title: Telco Outage Notification - Telstra Melbourne Indial (03 9609 XXXX-XXXX)

Change Start Date & Time: 08/09/2024 00:00:00 AEST

Change End Date & Time: 08/09/2024 06:00:00 AEST

Outage Start Date & Time:

Outage End Date & Time:

Environment: Production

Participant Impact and Requirements: Outage Duration:
3 x 15 Minutes

Impacts:

Reduced redundancy for Inbound and Outbound Calls (automatically rerouted via Perth).

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?d=pp_services_status for any planned/unplanned maintenance activities .




118405MARKET SYSTEMS23/09/2024 03:36:16 PM

CHG0098660 | Production | Telco Outage Notification - Telstra Melbourne Indial (03 9609 XXXX-XXXX)

Change Number: CHG0098660

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: Cisco IP Phone

Change Title: Telco Outage Notification - Telstra Melbourne Indial (03 9609 XXXX-XXXX)

Change Start Date & Time: 24/09/2024 00:00:00 AEST

Change End Date & Time: 24/09/2024 06:00:00 AEST

Outage Start Date & Time:

Outage End Date & Time:

Environment: Production

Participant Impact and Requirements: Outage Duration:
1 x 3 Hours

Impacts:
Reduced redundancy for Inbound and Outbound Calls (automatically rerouted via Perth).

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?d=pp_services_status for any planned/unplanned maintenance activities .

118331MARKET SYSTEMS20/09/2024 10:19:05 AM

CHG0098562 | Pre-Production | Pre-Production Electricity Market Management System (EMMS) Maintenance - Outages

Change Number: CHG0098562

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: Electricity Market Management System_PreProd

Change Title: Pre-Production Electricity Market Management System (EMMS) Maintenance - Outages

Change Start Date & Time: 23/09/2024 14:00:00 AEST
Change End Date & Time: 26/09/2024 17:00:00 AEST
Outage Start Date & Time: 24/09/2024 10:00:00 AEST
Outage End Date & Time: 26/09/2024 17:00:00 AEST

Environment: Pre-Production

Participant Impact and Requirements: This Maintenance activity may cause intermittent outages to below applications during the outage period .

Impacted Systems:
1.EMMS systems (Dispatch/ PASA/ Forecasting/ Settlements)
2.Identity Service will be running only for authentication purposes.
3.Web Portal including menu items (Markets, Internal & Public portal)
4.GSH
5.GBB
6.Any GAS systems that have a NEMA / WARA database connection.
7.MSATS
8.CDR
9.DERR

If any ongoing issues are identified, please contact the AEMO Support Hub 1300 236 600.

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 .
118323CONSTRAINTS19/09/2024 04:20:22 PM

Update to system normal constraint equation in NSW for transient voltage stability in south-west NSW

AEMO ELECTRICITY MARKET NOTICE

Refer to market notice 92840.

Transgrid has advised AEMO of an update to the transient voltage stability limit in south-west NSW for loss of Darlington Point to Wagga (63) 330 kV line. The limit will include terms for the Darlington Point and Riverina BESS.

The following constraint equation will be updated with the above changes at 1100 hrs Friday 20th September 2024.
N::N_NIL_63

For full details on the formulation, the new constraint equation has now been loaded into AEMO's pre-production systems.

For further details on these constraint equation please contact ben.blake@aemo.com.au

Ben Blake
AEMO Operations
118322POWER SYSTEM EVENTS19/09/2024 04:16:27 PM

Update - Non-credible contingency event - TAS region - 19/09/2024

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - TAS region - 19/09/2024

Refer AEMO Electricity Market Notice 118321

At 1446 hrs the Gordon - Chapel St No 1 and No 2 220 kV lines were returned to service.

This non-credible contingency event was caused by lightning. 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.


Manager NEM Real Time Operations
118321POWER SYSTEM EVENTS19/09/2024 03:28:41 PM

Update - Non-credible contingency event - TAS region - 19/09/2024

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - TAS region - 19/09/2024

At 1340 hrs the Gordon - Chapel St No1 and No 2 220 kV lines tripped.

AEMO did not instruct load shedding.

AEMO has advised of approximately 112 MW disconnection of bulk electrical load,
disconnection of generation at Studland Bay Wind generator (71 MW) and 23 MW generation reduction at Gordon Power station.

The cause of this non credible contingency event is not known at this stage.

Manager NEM Real Time Operations
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