Market Notices

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: Collinsville Nth-Clare Sth Tee King Creek 7128 132kV and Strathmore-Clare South 7208 132kV

Cancellation time: 25/02/2020 15:04

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 74446

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: Ross - Chalumbin No.857 275 kV and Ross - Chalumbin No.858 275 kV

Duration: 25/02/2020 14:26 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: Chalumbin - Turkinje No.7165 132 kV and Chalumbin - Turkinje No.7166 132 kV

Duration: 25/02/2020 14:26 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: VIC1

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

Duration: 25/02/2020 13:01 until further notice

Constraint set(s) invoked:
V-HWRO_R_N-2 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: QLD1

Lines: Collinsville Nth-Clare Sth Tee King Creek 7128 132kV and Strathmore-Clare South 7208 132kV

Duration: 25/02/2020 13:01 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation :Terranora
Unplanned outage of one cable of Directlink occurred at 1150 hrs
The following constraint set was invoked at 1200 hrs until further notice.
N-X_MBTE_3
This Constraint Set contains an equation with the following interconnector on the LHS.
N-Q-MNSP1

Refer to AEMO Network Outage Scheduler (NOS) for further details.

Manager NEM Real Time Operations

Change Number: CHG0057844

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: MSATS - Business to Business data exchange

Change Title: Pre-Prod performance testing of new webMethods upgraded platform (webMethods V10.3, SQL2017)

Change Start Date & Time: 27/02/2020 09:00:00 AEST

Change End Date & Time: 05/03/2020 17:00:00 AEST

Outage Start Date & Time:

Outage End Date & Time:

Change Description:

Please be aware that AEMO will be performing Electricity & Gas Retail B2B performance testing in pre-production from 09:00 on 27th February 2020 (Market time) through to 17:00 on 5th March 2020.

This may mean an intermittent degradation in B2B responses during this time.

Environment: Pre-Production

Participant Impact and Requirements:

Please be aware of this planned performance testing and potential for intermittently degraded response times if you are using the pre-production B2B systems.

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

Change Number: CHG0058145

Notification issued to: Market Notice

Notification Type: Initial

Change Type: Normal

Service/ Component: Short Term Trading Market

Change Title: MW - Planned System Outage - STTM PreProduction Systems - Windows Updates

Change Start Date & Time: 27/02/2020 09:00:00 AEST

Change End Date & Time: 27/02/2020 17:00:00 AEST

Outage Start Date & Time: 27/02/2020 10:00:00 AEST

Outage End Date & Time: 27/02/2020 12:00:00 AEST

Change Description:

Maintenance activities to be performed on the Gas Short Term Trading Market Systems Preproduction.

Environment: Pre-Production

Participant Impact and Requirements:

This is a regular procedure to allow routine maintenance. All access to the following systems will be unavailable.

Gas Short Term Trading Market (STTM) - Preproduction

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

The MTPASA result published on 25 February 2020 identifies no Low Reserve Conditions.

Please note that MTPASA informs the market of potential reliability issues to allow the market to respond in the first instance, potentially avoiding the need for any market intervention or direction from AEMO.

For further information, please refer to:
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data/Market-Management-System-MMS/Projected-Assessment-of-System-Adequacy

This notice supersedes Market Notice 74252 published on 18 February 2020.

Background
As part of a broader process of implementing the reliability standard, AEMO runs the Medium Term Projected Assessment of System Adequacy (MTPASA) process weekly to forecast expected unserved energy levels over a two year period. If the expected annual unserved energy exceeds the maximum level specified by the Reliability Standard, a Low Reserve Condition is identified.

For more information about how AEMO implements the reliability standard, please view the Reliability Standard Implementation Guidelines (RSIG) available on AEMO's website at
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Planning-and-forecasting/Reliability-Standard-Implementation-Guidelines

Forecasting
AEMO