AEMO ELECTRICITY MARKET NOTICE.

Reclassification of a non-credible contingency event as a credible contingency event due to severe weather warning.for damaging winds
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: SA
Lines: Brinkworth-Davenport, Brinkworth-Templers West and Para-Templers West 275kV lines
Duration: 13/06/2018 1715 hrs until further notice
Constraint set(s) invoked: Nil

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: Chinchilla - Columboola No.7349 132 kV and Chinchilla - Columboola No.7350 132 kV

Cancellation time: 13/06/2018 16:21

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 63187

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: Chinchilla - Columboola No.7349 132 kV and Chinchilla - Columboola No.7350 132 kV

Duration: 13/06/2018 14:47 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR1 condition in the VIC region advised in AEMO Electricity Market Notice No. 63177 is cancelled at 1400 hrs 13/06/2018.

No LOR condition is currently forecast in the STPASA period.

Daniel Ghantous
AEMO 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: Chinchilla - Columboola No.7349 132 kV and Chinchilla - Columboola No.7350 132 kV

Duration: 13/06/2018 13:30 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE VIC1 Region Tuesday, 12 June 2018

AEMO declared a schedule generating unit non-conforming

Unit: YWPS2
Duration: 12/06/2018 23:10 to 12/06/2018 23:20
Amount: -50 MW
Constraint: NC-V_YWPS2

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

The MTPASA result published on 12 June 2018 identifies no Low Reserve Conditions over the next 2 years.

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 63065 published on 05 June 2018.

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
http://www.aemo.com.au/-/media/Files/Stakeholder_Consultation/Consultations/Electricity_Consultations/2016/EAAP/Reliability-Standard-Implementation-Guidelines.pdf

Forecasting
AEMO

AEMO ELECTRICITY MARKET NOTICE

The Tungkillo - Tailem Bend 275kV line in South Australia (SA) region which was previously planned to be out of service from 1/05/2018 0830hrs to 01/06/2018 1730 hrs (refer to market notice 62629) has now been rescheduled to the outage period 09/07/2018 0830 hrs - 10/07/2018 1730hrs.

During this outage, SA will remain connected to the rest of the NEM via the Tailem Bend - Cherry Garden 275kV line and the 132kV network.

A credible contingency event on the Tailem Bend - Cherry Garden 275 kV line during this planned outage will sever the 275kV connections between the NEM and SA. If SA remains connected to the NEM via the 132kV network, this will pose a system security issue.

If the above credible contingency occurs, 35 MW of raise and lower regulation FCAS will be sourced from within SA.

If this occurs, AEMO will take all necessary steps as outlined in Section 6.1 of SO-OP-3715 Power System Security Guideline to separate the 132kV network and therefore manage an orderly separation of SA from the NEM.

Diyoni Hoole
AEMO Operations

AEMO ELECTRICITY MARKET NOTICE.

AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any severe weather activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.

Region: SA

Lines: Para-Templers West and Magill-Torrens Island A 275kV lines

Cancellation time: 0310 hrs 12/06/2018
Constraint set(s) revoked: Nil

Refer AEMO Electricity Market Notice 63179

Manager NEM Real Time Operations