Market Notices

85085RESERVE NOTICE04/05/2021 02:07:10 PM

RESERVE NOTICE MT PASA PUBLICATION 4 May 2021

The MTPASA result published on 4 May 2021 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 84852 published on 27th April 2021.

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
     
85084GENERAL NOTICE04/05/2021 12:12:39 PM

Planned outage of Tailem Bend - South East 275kV No 2 line in the SA region from 04/06/2021 to 06/06/2021.

AEMO ELECTRICITY MARKET NOTICE

The Tailem Bend - South East 275kV No 2 line in South Australia (SA) region is planned to be out of service from 0900 hrs on 04/06/2021 to 1730 hrs on 06/06/2021.

During this outage, SA will remain connected to the rest of the NEM via the Tailem Bend - South East 275kV No 1 line and the 132kV network.

A credible contingency event on the Tailem Bend - South East 275kV No 1 line during this planned outage will sever the 275kV connections between Victoria and SA. If SA remains connected to Victoria via the 132kV network only, this will pose a system security issue.

If the above credible contingencies occurs, AEMO will take all necessary steps as outlined in Section 3.1 of SO_OP_3715 Power System Security Guideline to separate the 132kV network and therefore manage an orderly separation of SA from the rest of the NEM.

Steve Oag
AEMO Operations
     
85083GENERAL NOTICE04/05/2021 12:01:19 PM

Planned outage of Tailem Bend - South East 275kV No 1 line in the SA region from 01/06/2021 to 03/06/2021.

AEMO ELECTRICITY MARKET NOTICE

The Tailem Bend - South East 275kV No 1 line in South Australia (SA) region is planned to be out of service from 0900 hrs on 01/06/2021 to 1730 hrs on 03/06/2021.

During this outage, SA will remain connected to the rest of the NEM via the Tailem Bend - South East 275kV No 2 line and the 132kV network.

A credible contingency event on the Tailem Bend - South East 275kV No 2 line during this planned outage will sever the 275kV connections between Victoria and SA. If SA remains connected to Victoria via the 132kV network only, this will pose a system security issue.

If the above credible contingencies occurs, AEMO will take all necessary steps as outlined in Section 3.1 of SO_OP_3715 Power System Security Guideline to separate the 132kV network and therefore manage an orderly separation of SA from the rest of the NEM.

Steve Oag
AEMO Operations
     
85082RESERVE NOTICE04/05/2021 05:51:57 AM

PDPASA - Cancellation of the Forecast Lack Of Reserve Level 1 (LOR1) in the NSW Region on 04/05/2021

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR1 condition in the NSW region advised in AEMO Electricity Market Notice No. 85081 is cancelled at 0530 hrs 04/05/2021

Manager NEM Real Time Operations
     
85081RESERVE NOTICE04/05/2021 04:06:22 AM

PDPASA - Update of Forecast Lack Of Reserve Level 1 (LOR1) in the NSW Region on 04/05/2021

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR1 condition in the NSW region advised in AEMO Electricity Market Notice No. 85067 has been updated at 0400 hrs to the following:

From 0730 hrs 04/05/2021 to 1030 hrs 04/05/2021.
The forecast capacity reserve requirement is 1430 MW.
The minimum capacity reserve available is 1187 MW.

Manager NEM Real Time Operations
     
85080RECLASSIFY CONTINGENCY04/05/2021 03:04:15 AM

Cancellation of a Non-Credible Contingency Event: Dederang - Glenrowan No.1 & No.3 220 kV Lines line and Numurkah Solar Farm line in VIC1 due to Lightning.

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 & No.3 220 kV Lines and Numurkah Solar Farm

Cancellation time: 04/05/2021 03:04

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


Refer AEMO Electricity Market Notice 85078

Auto-generated on behalf of Manager NEM Real Time Operations
     
85079RECLASSIFY CONTINGENCY04/05/2021 02:39:15 AM

Cancellation of a Non-Credible Contingency Event: Eildon PS - Mt Beauty No.1 220 kV line and Eildon PS - Mt Beauty No.2 220 kV line in VIC1 due to Lightning.

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: 04/05/2021 02:39

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 85074

Auto-generated on behalf of Manager NEM Real Time Operations
     
85078RECLASSIFY CONTINGENCY04/05/2021 01:59:15 AM

Reclassification of a Non-Credible Contingency Event: Dederang - Glenrowan No.1 & No.3 220 kV Lines line and Numurkah Solar Farm line in VIC1 due to Lightning.

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

Duration: 04/05/2021 01:59 until further notice

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


Auto-generated on behalf of Manager NEM Real Time Operations
     
85077RECLASSIFY CONTINGENCY04/05/2021 01:24:18 AM

Cancellation of a Non-Credible Contingency Event: Dederang - Glenrowan No.1 & No.3 220 kV Lines line and Numurkah Solar Farm line in VIC1 due to Lightning.

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 & No.3 220 kV Lines and Numurkah Solar Farm

Cancellation time: 04/05/2021 01:24

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


Refer AEMO Electricity Market Notice 85076

Auto-generated on behalf of Manager NEM Real Time Operations
     
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