Market Notices

AEMO ELECTRICITY MARKET NOTICE

Possible intervention to manage power system security in South Australia (SA) Region

The synchronous generating units expected to be synchronised in SA from 1800 hrs 19/04/2021 to 0630 hrs 20/04/2021 in Pre-dispatch published at 1330 hrs 18/04/2021 are inadequate to maintain sufficient system strength in SA and hence a secure operating state.

AEMO currently estimates that, in the absence of sufficient market response by 1500 hrs 19/04/2021, AEMO may need to intervene by issuing a direction requiring one or more SA synchronous generating unit(s) to operate or remain synchronised to maintain power system security in SA.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 17/04/2021

Refer Market Notice 84391

The AEMO Intervention Event and all associated directions are cancelled from 1700 hrs 18/04/2021

Manager NEM Real Time Operations

AAEMO ELECTRICITY MARKET NOTICE.

Direction - SA Region - 17/04/2021

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 dispatch intervals during the event to be intervention dispatch intervals, commencing from the interval ending 1405 hrs on 17/04/2021.

Intervention pricing does not apply to this AEMO intervention event.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 15/04/2021

Refer Market Notice 84368

The AEMO Intervention Event and all associated directions are cancelled from 1630 hrs 17/04/2021

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Possible intervention to manage power system security in South Australia (SA) Region

The synchronous generating units expected to be synchronised in SA from 0030 hrs 18/04/2021 to 0400 hrs 19/04/2021 in Pre-dispatch published at 1300 hrs 17/04/2021are inadequate to maintain sufficient system strength in SA and hence a secure operating state.

AEMO currently estimates that, in the absence of sufficient market response by 1400 hrs 17/04/2021 , AEMO may need to intervene by issuing a direction requiring one or more SA synchronous generating unit(s) to operate or remain synchronised to maintain power system security in SA.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-Regional Transfer limit variation - Directlink - NSW Region -17/04/2021

There has been an unplanned outage of the No 2 Leg of Directlink

The following constraint set was invoked at 1000 hrs 17/04/2021.

N-MBTE_1

The constraint set contains the following interconnector on the left hand side.

N-Q-MNSP1

Refer AEMO Network Outage Scheduler (NOS) for further details.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Tamworth -Liddell 84 330 kV Line - NSW region - 17/04/2021

A planned outage of Tamworth -Liddell 84 330 kV Line was scheduled from 0700 hrs 17/04/2021 to 1700 hrs 17/04/2021.

The outage has been completed and returned to service at 0900 hrs 17/04/2021

Constraint set revoked: N-LDTW_84

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

Change Number: CHG0063705

Notification issued to: Market Notice

Notification Type: Completed

Change Type: Normal

Service/ Component: MSATS - Consumer Administration and Transfer Solution(CATS)

Change Title: 5MS R3 Retail Pre-Prod Cutover

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

Change Number: CHG0063725

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: Internet

Change Title: Planned maintenance on core network infrastructure in AEMO QLD Datacentre

Change Start Date & Time: 01/05/2021 08:00:19 AEST

Change End Date & Time: 01/05/2021 20:00:34 AEST

Outage Start Date & Time: 01/05/2021 09:00:56 AEST

Outage End Date & Time: 01/05/2021 14:00:10 AEST

Change Description:

Planned maintenance on core network infrastructure in AEMO QLD datacentre.

Environment: Production

Participant Impact and Requirements:

External

The following impacts are expected to participant connectivity during this planned outage:

IPWAN Participants - Nil

Lan-2-Lan VPN Participants (IPSEC) - Up to 4 hours to participants who have established their VPN connection/s via the AEMO QLD datacenter termination point (202.44.76.10)
Note: Participants are encouraged to ensure their VPN connections are already established or are configured (as per AEMO best practice) to automatically failover to the alternate AEMO NSW datacenter termination point (202.44.78.10) prior to this scheduled outage.

B2B VPN - Upto 4 hours outage to TNSPs with B2B VPN to AEMO QLD Datacentre.

SSL VPN Participants: SSLVPN users may experience an outage as services are moved to the alternate AEMO VPN access point.

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