Market Notices

89133MARKET INTERVENTION30/07/2021 02:24:39 PM

Update - Possible intervention to manage power system security in South Australia (SA) Region

AEMO ELECTRICITY MARKET NOTICE

Update - Possible intervention to manage power system security in South Australia (SA) Region

Refer AEMO Electricity Market Notice 89121

The synchronous generating units currently expected to be synchronised in SA from 2200 hrs 30/07/2021 to 1700 hrs 31/07/2021 will be inadequate to maintain sufficient system strength in SA and hence a secure operating state.

AEMO estimates that, in the absence of sufficient market response by 1600 hrs 30/07/2021, 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
     
89132NON-CONFORMANCE30/07/2021 01:50:14 PM

NON-CONFORMANCE Region QLD1 Friday, 30 July 2021

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE QLD1 Region Friday, 30 July 2021

AEMO declared a schedule generating unit non-conforming

Unit: MPP_2
Duration: 30/07/2021 13:40 to 30/07/2021 13:50
Amount: 18 MW
Constraint: NC-Q_MPP_2

Auto-generated on behalf of Manager NEM Real Time Operations
     
89127RECLASSIFY CONTINGENCY29/07/2021 03:07:25 PM

Cancellation of a Non-Credible Contingency Event: Farrell - Reece No.1 220 kV line and Farrell - Reece No.2 220 kV line in TAS1 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: TAS1

Lines: Farrell - Reece No.1 220 kV and Farrell - Reece No.2 220 kV

Cancellation time: 29/07/2021 15:07

Constraint set(s) revoked:
F-T-FARE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
T-V-MNSP1


Refer AEMO Electricity Market Notice 89117

Auto-generated on behalf of Manager NEM Real Time Operations
     
89126RECLASSIFY CONTINGENCY29/07/2021 03:07:25 PM

Cancellation of a Non-Credible Contingency Event: Farrell-John Butters line and Farrell-Rosebery-Newton-Queenstown line in TAS1 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: TAS1

Lines: Farrell-John Butters and Farrell-Rosebery-Newton-Queenstown

Cancellation time: 29/07/2021 15:07

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 89118

Auto-generated on behalf of Manager NEM Real Time Operations
     
89125MARKET INTERVENTION29/07/2021 04:46:15 PM

Direction - SA Region 29/07/2021

AEMO ELECTRICITY MARKET NOTICE.

Direction - SA region 29/07/2021

In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a).

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.

The issue of the direction commences an AEMO intervention event. AEMO declares all dispatch intervals during the event to be intervention dispatch intervals, commencing from the interval ending 1605 hrs on 29/07/2021.

Intervention pricing does not apply to this AEMO intervention event.

Manager NEM Real Time Operations
     
89121MARKET INTERVENTION29/07/2021 02:13:56 PM

Possible intervention to manage power system security in South Australia (SA) Region

AEMO ELECTRICITY MARKET NOTICE

Possible intervention to manage power system security in South Australia (SA) Region

The synchronous generating units currently expected to be synchronised in SA from 2100 hrs 29/07/2021 to 0400 hrs 31/07/2021 will be inadequate to maintain sufficient system strength in SA and hence a secure operating state.

AEMO estimates that, in the absence of sufficient market response by 1600 hrs 29/07/2021, 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
     
89120MARKET INTERVENTION29/07/2021 04:35:00 PM

Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 26/07/2021

AEMO ELECTRICITY MARKET NOTICE

Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 26/07/2021

Refer Market Notice 88893

The AEMO Intervention Event and all associated directions are cancelled from 1630 hrs 29/07/2021

Manager NEM Real Time Operations
     
89118RECLASSIFY CONTINGENCY29/07/2021 12:35:00 PM

Reclassification of a Non-Credible Contingency Event: Farrell-John Butters line and Farrell-Rosebery-Newton-Queenstown line in TAS1 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: TAS1

Lines: Farrell-John Butters and Farrell-Rosebery-Newton-Queenstown

Duration: 29/07/2021 12:34 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations
     
89117RECLASSIFY CONTINGENCY29/07/2021 12:20:30 PM

Reclassification of a Non-Credible Contingency Event: Farrell - Reece No.1 220 kV line and Farrell - Reece No.2 220 kV line in TAS1 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: TAS1

Lines: Farrell - Reece No.1 220 kV and Farrell - Reece No.2 220 kV

Duration: 29/07/2021 12:20 until further notice

Constraint set(s) invoked:
F-T-FARE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
T-V-MNSP1


Auto-generated on behalf of Manager NEM Real Time Operations
     
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