Market Notices

Change Number: CHG0060822

Notification issued to: Market Notice

Notification Type: Completed

Change Type: Normal

Service/ Component: MSATS - Meter Data Management

Change Title: Planned Extended Outage - MSATS B2M and E-Hub FTP and API's for Maintenance

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: NSW1

Lines: Bayswater - Mt Piper No.5A3 500kV and Wollar - Mt Piper No.5A5 500kV

Duration: 18/10/2020 16:00 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Cancellation Inter-Regional Transfer limit variation - Murraylink control unavailable (SA Region).

Refer AEMO Electricity Market Notice 78950

AEMO has been notified that the controls to vary Murraylink output are available.

The Constraint Set I-CTRL_ISSUE_ML was revoked from 1025 hrs

This Constraint Set contains equations with the following interconnectors on the LHS.

V-S-MNSP1



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 2230 hrs 19/10/2020 to the end of the Predispatch period (0400 hrs 20/10/2020) in Pre-dispatch published at 1500 hrs 18/10/2020 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 1800 hrs 19/10/2020, 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: Bulli Creek - Dumaresq 8L 330KV and Bulli Creek - Dumaresq 8M 330KV

Duration: 18/10/2020 15:00 until further notice

Constraint set(s) invoked:
I-QNI_ONE_PHASE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NSW1-QLD1


Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

The Hazelwood - Rowville No.3 500 kV Line has been de-energised to manage voltages in the VIC region.

The following constraint set was invoked at 0145 hrs 18/10/2020

V-X_HWSM_HWRO3

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

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

Refer to AEMO Network Outage Schedule for further details

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

AEMO has been notified that the controls to vary Murraylink output are unavailable until further notice.

Constraint Set I-CTRL_ISSUE_ML was invoked from 2215 hrs until further notice

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: VIC1

Lines: Eildon PS - Mt Beauty No.1 220 kV and Eildon PS - Mt Beauty No.2 220 kV

Cancellation time: 17/10/2020 21:24

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 78946

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE.

Cancellation of the 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: VIC

Lines: Dederang - Glenrowan No. 1 and No. 3 220kV lines and Numurkah Solar Farm

Cancellation time: 21:00 hrs 17/10/2020

Constraint set(s) revoked: V-NIL_DDGN_NSF_N-2

Refer AEMO Electricity Market Notice 78947

Manager NEM Real Time Operations