Market Notices

AEMO ELECTRICITY MARKET NOTICE

Refer to AEMO Electricity Market Notices 71128

Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Bushfire. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly, AEMO continues to reclassify it as a credible contingency event.

Region: NSW1

Lines: Armidale-Dumaresq 8C 330 kV Line and Armidale-Sapphire WF 8E 330 kV Line

Duration: 08/11/2019 09:05 until further notice

Constraint set invoked: F-I-BCDM_N-2

Constraint set contains the following interconnector(s) on the left hand side:

NSW1-QLD1
T-V-MNSP1

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to a Bushfire. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly, AEMO continues to reclassify it as a credible contingency event.

Region: NSW

Lines: Bayswater - Regentville 31 330 kV Line and Bayswater - Sydney West 32 330 kV Line.

Duration: 12/11/2019 16:05 until further notice.

Constraint set(s) invoked: N-X_31+32_N-2

Refer AEMO Electricity Market Notices 71129


Manager NEM Real Time Operations

Change Number: CHG0056768

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: Gas Supply Hub

Change Title: Planned System Outage - Gas Supply Hub Production

Change Start Date & Time: 21/11/2019 18:00:00 AEST

Change End Date & Time: 21/11/2019 20:00:00 AEST

Outage Start Date & Time: 21/11/2019 18:00:00 AEST

Outage End Date & Time: 21/11/2019 20:00:00 AEST

Change Description:

Planned System Outage - Gas Supply Hub Production

Environment: Production

Participant Impact and Requirements:

All access to the Gas Supply Hub (Exchange Trading System) will be unavailable during the outage period. Access will be available outside this outage period.

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

Change Number: CHG0056644

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: Electricity Market Management System

Change Title: Planned System Maintenance - Electricity MMS Production

Change Start Date & Time: 21/11/2019 12:00:21 AEST

Change End Date & Time: 21/11/2019 16:00:29 AEST

Outage Start Date & Time:

Outage End Date & Time:

Change Description:

Internal/External Notification : Planned System Maintenance - Electricity MMS Production maintenance activity

Environment: Production

Participant Impact and Requirements:

The maintenance activity is not expected to have any impact on the production environment, however please be reminded that this activity is not without risk and therefore if any issue is after the maintenance window it should be reported to AEMO.

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

Change Number: CHG0056687

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: Gas Supply Hub

Change Title: Planned System Outage - Gas Supply Hub

Change Start Date & Time: 19/11/2019 19:00:00 AEST

Change End Date & Time: 19/11/2019 23:00:00 AEST

Outage Start Date & Time: 19/11/2019 19:00:00 AEST

Outage End Date & Time: 19/11/2019 23:00:00 AEST

Change Description:

Maintenance activity on Gas Supply Hub Production System.

Environment: Production

Participant Impact and Requirements:

All access to the Gas Supply Hub (Exchange Trading System) will be unavailable during the outage period. Access will be available outside this outage period.

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

AEMO ELECTRICITY MARKET NOTICE.

AEMO Intervention Event - Intervention price dispatch intervals - 13/11/2019

Refer AEMO Electricity Market Notice no. 71137

An AEMO Intervention Event occurred when AEMO issued a direction to maintain the power system in a secure operating state.

The AEMO Intervention Event commenced in the 1635 hrs dispatch interval and is forecast to apply until 0400 hrs 15/11/2019.

AEMO declares all dispatch intervals during the AEMO Intervention Event to be intervention price dispatch intervals.

The direction is expected to affect dispatch quantities for intervention pricing purposes from the 0935 hrs dispatch interval on 14/11/2019.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE.

Direction - SA region 13/11/2019

In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region.

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.

For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a).


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 0900 hrs 14/11/2019 to 0430 hrs 15/11/2019 in Pre-dispatch published at 1500 hrs 13/11/2019 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 13/11/2019, 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

Refer to MN 71130: Due to of the existence of abnormal conditions, namely multiple large bushfires burning across NSW.

To manage System security the following constraint set was invoked at 1255 hrs 13/11/2019.

I-NQTE_-40

The constraint set contains the following interconnector on the left hand side.

N-Q-MNSP1

Manager NEM Real Time Operations