Market Notices

AEMO ELECTRICITY MARKET NOTICE

Cancellation: Planned outage of Heywood - Mortlake No.2 line Bus 500 kV CB (213) at Heywood in the VIC region, beginning on 06/03/2019

Refer AEMO Electricity Market Notice 67584.

The Heywood - Mortlake No.2 line Bus 500 kV CB (213) at Heywood in the Victoria region was planned to be out of service from 1330 hrs on 06/03/2019 to 1500 hrs on 06/03/2019.

This planned outage has been postponed until further notice.

All constraint sets associated with this outage have been revoked.

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: Clare South- King Creek 7128/2 132kV and Strathmore - Clare South 7208 132kV

Cancellation time: 06/03/2019 07:54

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 67593

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: QLD1

Lines: Moranbah - Goonyella No.7370 132 kV and Moranbah - Goonyella No.7369 132 kV

Duration: 06/03/2019 07:50 until further notice

Constraint set(s) invoked:
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: QLD1

Lines: Clare South- King Creek 7128/2 132kV and Strathmore - Clare South 7208 132kV

Duration: 06/03/2019 06:51 until further notice

Constraint set(s) invoked:
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: QLD1

Lines: Goonyella - Nth Goonyella T- Stoney Creek 7122 132 kV and Goonyella - Newlands No. 7155 132 kV

Duration: 06/03/2019 06:12 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

Change Number: CHG0053035

Notification issued to: Market Notice

Notification Type: Completed

Change Type: Normal

Service/ Component: Declared Wholesale Gas Market

Change Title: Planned System Outage - Declared Wholesale Gas Market (DWGM) maintenance.

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

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: 05/03/2019 18:14

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 67571

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

The Heywood - Mortlake No.2 line Bus 500 kV CB (213) at Heywood in the Victoria region is planned to be out of service from 1330 hrs on 06/03/2019 to 1500 hrs on 06/03/2019.

A credible contingency event during this planned outage could cause synchronous separation of the South Australia (SA) region from the rest of the NEM. If separation occurs, load may be interrupted due to the operation of the Automatic Under Frequency Load Shedding (AUFLS) scheme in SA.

The credible separation contingency is managed as follows:
When power transfer is from SA to Victoria, contingency lower FCAS will be sourced from SA.
When power transfer is from Victoria to SA, due to the 47-52Hz Island separation frequency band advised by the SA jurisdiction, contingency raise FCAS is not sourced in SA and the AUFLS scheme may respond to low frequency events.

Forecast capacity reserves in the SA region are currently sufficient to meet electricity demand during the planned outage.

The following constraint sets have been invoked for this outage:
F-I-HYSE
I-VS_050
S-X_BC_CP
V-HYCB_210_213

Refer AEMO Network Outage Schedule (NOS) for further 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: Dederang - Glenrowan No.1 220 kV and Dederang - Glenrowan No.3 220 kV

Cancellation time: 05/03/2019 17:54

Constraint set(s) revoked:
V-DDGN_N-2 Constraint set contains the following interconnector(s) on the left hand side:
V-S-MNSP1
V-SA
VIC1-NSW1


Refer AEMO Electricity Market Notice 67570

Auto-generated on behalf of Manager NEM Real Time Operations