Market Notices

AEMO ELECTRICITY MARKET NOTICE

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

The synchronous generating units currently expected to be synchronised in SA from 0100 hrs 05/09/2021 to 1800 hrs 05/09/2021 will be inadequate to maintain sufficient system strength in SA and hence a secure operating state.

AEMO estimates that, in the absence of sufficient market response by 1700 hrs 04/09/2021, 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 Operation

AEMO ELECTRICITY MARKET NOTICE

Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 03/09/2021

Refer Market Notice 90205

The AEMO Intervention Event and all associated directions are cancelled from 1700 hrs 04/09/2021

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE QLD1 Region Saturday, 4 September 2021

AEMO declared a schedule generating unit non-conforming

Unit: STAN-4
Duration: 04/09/2021 08:00 to 04/09/2021 08:05
Amount: 16 MW
Constraint: NC-Q_STAN-4

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

The Hazelwood - South Morang No 2 500 kV Line has been de-energised to manage voltages in the Victoria region.

The following constraint set was invoked at 0220 hrs 04/09/2021.

V-HWSM

The constraint set contains equations with the following interconnectors on the LHS.

T-V-MNSP
V-S-MNSP1
V-SA
VIC1-NSW1

Refer to AEMO Network Outage Scheduler (NOS) for return to service details

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: VIC1

Lines: Hazelwood - Rowville No.1 220kV and Hazelwood - Rowville No.2 220kV

Cancellation time: 03/09/2021 17:19

Constraint set(s) revoked:
V-HWRO_R_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NONE


Refer AEMO Electricity Market Notice 90200

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE NSW1 Region Friday, 3 September 2021

AEMO declared a schedule generating unit non-conforming

Unit: BW02
Duration: 03/09/2021 16:25 to 03/09/2021 16:30
Amount: 48 MW
Constraint: NC-N_BW02

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Direction - SA Region - 03/09/2021

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 1705 hrs on 03/09/2021.

Intervention pricing does not apply to this AEMO intervention event.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

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

Refer AEMO Electricity Market Notice 90198

The synchronous generating units currently expected to be synchronised in SA from 0900 hrs 04/09/2021 to 0400 hrs 05/09/2021 will be inadequate to maintain sufficient system strength in SA and hence a secure operating state.

AEMO estimates that, in the absence of sufficient market response by 1700 hrs 03/09/2021, 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 Operation

Market Notice
Change Number: CHG0069318
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Gas B2B Hub/ MSATS - Business to Business data exchange
Change Title: e-Hub production cutover of existing keystore
Change Start Date & Time: 19/09/2021 10:00:00 AEST
Change End Date & Time: 19/09/2021 12:00:00 AEST
Outage Start Date & Time:
Outage End Date & Time:
Change Description: Please note that the X.509 digital public certificate securing traffic from the following endpoints is being renewed
Environment: Production
Participant Impact and Requirements:
Participants connecting to these endpoints or receiving requests from AEMO's eHub B2B or FRC Gas hub platforms and have certificate pinning/fingerprinting in place will notice a change in the certificate fingerprint and may need to update their systems accordingly.
https://apis.prod.aemo.com.au:9319
https://apis.prod.marketnet.net.au:9319
https://hub.aemo.com.au:5319
https://hub.marketnet.net.au:5319
https://prod.frchub.net:5319
Certificates can be downloaded from https://dev.aemo.com.au/tls-certificates#certificate-downloads


User Requirements:
Users validating the existing certificate will notice a change in the certificate fingerprint and may need to update their systems accordingly.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.