Market Notices

AEMO ELECTRICITY MARKET NOTICE

Cancellation - Inter-regional transfer limit variation - constraint to manage Power System Security Murraylink - 27/11/2020

Refer AEMO Electricity Market Notice 80370

In order to maintain the power system in a secure operating state, AEMO has invoked constraint set I-VSML_080 from 1320 hrs to 1940 hrs

This constraint set contains equations with the following interconnector on the LHS;

V-S-MNSP1

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 Nth-Clare Sth Tee King Creek 7128 132kV and Strathmore-Clare South 7208 132kV

Cancellation time: 27/11/2020 17:59

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 80377

Auto-generated on behalf of 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 2330 hrs 28/11/2020 to 1500 hrs 29/11/2020 in Pre-dispatch published at 1800 hrs 27/11/2020 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 1600 hrs 28/11/2020, 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

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 Nth-Clare Sth Tee King Creek 7128 132kV and Strathmore-Clare South 7208 132kV

Duration: 27/11/2020 15:55 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of 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: Chalumbin - Turkinje No.7165 132 kV and Chalumbin - Turkinje No.7166 132 kV

Cancellation time: 27/11/2020 15:24

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 80366

Auto-generated on behalf of Manager NEM Real Time Operations

Market Notice

Change Number: CHG0062118

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: Declared Wholesale Gas Market

Change Title: Maintenance activity - Preprod DWGM system

Change Start Date & Time: 08/12/2020 09:00:00 AEST

Change End Date & Time: 08/12/2020 13:00:00 AEST

Outage Start Date & Time: 08/12/2020 10:00:00 AEST

Outage End Date & Time: 08/12/2020 13:00:00 AEST

Change Description:

Maintenance is to be performed on the AEMO pre-production Declared Wholesale Gas Market Systems to improve reliability and performance. During the maintenance, there will be an outage to the system as per the times mentioned.

Environment: Pre-Production

Participant Impact and Requirements:

The following impacts are expected during this maintenance:
- All access to the Declared Wholesale Gas Market Production pre-production Systems will be unavailable.

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

Market Notice

Change Number: CHG0062109

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

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

Change Title: Planned Outage - MSATS Pre-production Data refresh (CATS and MDM)

Change Start Date & Time: 07/12/2020 10:00:00 AEST

Change End Date & Time: 21/12/2020 10:00:02 AEST

Outage Start Date & Time: 14/12/2020 10:00:00 AEST

Outage End Date & Time: 21/12/2020 16:00:00 AEST

Change Description:

Planned Outage - MSATS Pre-production Data refresh (CATS and MDM)

Environment: Pre-Production

Participant Impact and Requirements:

The purpose of this change is to advise participants that the MSATS pre-production data (for CATS and MDM databases) will be refreshed from production data. The aim of this data refresh is to update pre-production with production data in preparation for 5 minute settlement Dress Rehearsals in 2021 .

Implications of Change
The data refresh will be from MSATS production data as of approximately Thursday 10th December 2020.
Participants should be aware that:

o Pre-production will be unavailable for the duration of the refresh (See Timing Of Change)

o AEMO will be testing a new refresh process that could potentially shorten the Refresh outage period, participants will be notified of the outage completion which may be earlier than the notified outage.

o Any test NMI data configurations within the pre-production environment will be over written; and
o Pre-production participant passwords will be retained.

The following actions will also be undertaken:

o Pending reports from production will be stopped and will not execute in pre-production.
o Change requests will continue to process in pre-production after the copy. Notifications as a result of these change requests being processed will be delivered in pre-production.
o Undelivered notificati

Market Notice

Change Number: CHG0062067

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: Local Area Network

Change Title: Planned maintenance on core network infrastructure in the AEMO Sydney datacentre

Change Start Date & Time: 05/12/2020 08:00:00 AEST

Change End Date & Time: 05/12/2020 17:00:00 AEST

Outage Start Date & Time: 05/12/2020 08:30:00 AEST

Outage End Date & Time: 05/12/2020 12:30:00 AEST

Change Description:

Planned maintenance on core network infrastructure in the AEMO Sydney datacentre.

Environment: Production

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

IPWAN Participants - Nil

Lan-2-Lan VPN Participants (IPSEC) - Upto 4 x 4 hours to participants who have established their VPN connection/s via the AEMO NSW datacenter termination point (202.44.78.10)
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 QLD datacenter termination point (202.44.76.10) prior to this scheduled outage.

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

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

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR1 condition in the QLD region advised in AEMO Electricity Market Notice No. 80367 has been updated at 1400 hrs 27/11/2020 to the following:

From 1500 to 1600 hrs 02/12/2020.
The forecast capacity reserve requirement is 761 MW.
The minimum capacity reserve available is 380 MW.

Ryan Burge
AEMO Operations