Market Notices

Change Number: CHG0060236

Notification issued to: Market Notice

Notification Type: Rescheduled

Change Type: Normal

Service/ Component: Short Term Trading Market

Change Title: Planned System Maintenance - STTM Production Systems - Active Site Windows Patching in Norwest

Change Start Date & Time: 10/09/2020 17:30:00 AEST

Change End Date & Time: 10/09/2020 22:30:00 AEST

Outage Start Date & Time: 10/09/2020 18:30:00 AEST

Outage End Date & Time: 10/09/2020 21:30:00 AEST

Change Description:

Maintenance is to be performed on the Production STTM to increase reliability, security and stability of the system. During the maintenance, there will be an outage to the application as per the times mentioned.

Environment: Production

Participant Impact and Requirements:

There will be no access to the Production STTM systems for the duration of the outage. Please access outside these hours.

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

AEMO ELECTRICITY MARKET NOTICE.

Direction - SA region - 03/09/2020

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 1645 hrs on 03/09/2020.

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 - 02/09/2020

Refer Market Notice 77427

The AEMO Intervention Event and all associated directions are cancelled from 1630 hrs 03/09/2020

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE VIC1 Region Thursday, 3 September 2020

AEMO declared a schedule generating unit non-conforming

Unit: YWPS3
Duration: 03/09/2020 15:45 to 03/09/2020 15:55
Amount: -13 MW
Constraint: NC-V_YWPS3

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: TAS1

Lines: Farrell-Sheffield No.1 220 kV and Farrell-Sheffield No.2 220 kV

Duration: 03/09/2020 15:47 until further notice

Constraint set(s) invoked:
T-FASH_N-2_CP4_S4 Constraint set contains the following interconnector(s) on the left hand side:
NONE


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: TAS1

Lines: Farrell-John Butters and Farrell-Rosebery-Newton-Queenstown

Duration: 03/09/2020 15:47 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

Change Number: CHG0060744

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

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

Change Title: Maintenance activity on MSATS Pre-Production database server

Change Start Date & Time: 04/09/2020 07:30:00 AEST

Change End Date & Time: 04/09/2020 13:00:00 AEST

Outage Start Date & Time: 04/09/2020 10:00:00 AEST

Outage End Date & Time: 04/09/2020 12:00:00 AEST

Change Description:

Maintenance activity on MSATS Pre-Production database server

Environment: Pre-Production

Participant Impact and Requirements:

Awareness of this outage. The MSATS Pre-Production environment will be unavailable during the outage times mentioned above to perform the maintenance activities.

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

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: Farrell - Reece No.1 220 kV and Farrell - Reece No.2 220 kV

Duration: 03/09/2020 15:10 until further notice

Constraint set(s) invoked:
F-T-FARE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
T-V-MNSP1


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 1000 hrs 03/09/2020 to 1630 hrs 03/09/2020 in Pre-dispatch published at 1430 hrs 03/09/2020 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 1530 hrs 03/09/2020 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