Market Notices

112078RECLASSIFY CONTINGENCY08/12/2023 11:51:05 AM

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: 08/12/2023 11:51 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations
112077RECLASSIFY CONTINGENCY08/12/2023 11:36:01 AM

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: 08/12/2023 11:35 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
112076RESERVE NOTICE08/12/2023 11:52:29 AM

STPASA - Update to the Forecast Lack Of Reserve Level 2 (LOR2) in the NSW Region on 09/12/2023

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR2 condition in the NSW region advised in AEMO Electricity Market Notice No. 112041 has been updated at 1100 hrs 08/12/2023 to the following:

From 1530 hrs 09/12/2023 to 1830 hrs 09/12/2023.
The forecast capacity reserve requirement is 1250 MW.
The minimum capacity reserve available is 776 MW.

AEMO is seeking a market response.

AEMO has not yet estimated the latest time it would need to intervene through an AEMO intervention event.

AEMO Operations
112074RECLASSIFY CONTINGENCY08/12/2023 10:50:21 AM

Reclassification of non-credible contingency event due to existence of widespread abnormal conditions - SA region.

AEMO ELECTRICITY MARKET NOTICE.

AEMO has identified that a non-credible contingency event impacting the power system is more likely to occur and is considered reasonably possible because of the existence of widespread abnormal conditions namely severe weather in the SA region.

AEMO has therefore reclassified the occurrence of a non-credible contingency event involving multiple plant due to these abnormal conditions as credible.

AEMO has taken the following action to maintain power system security at 1050 hrs 08/12/2023.
Constraint set invoked: I-VS_250

Duration: 1050 hrs 08/12/2023. until further notice

Need for further measures is being monitored and further measures may be implemented in line with the Power System Security Guidelines (SO_OP_3715).

Manager NEM Real Time Operations
112059RECLASSIFY CONTINGENCY08/12/2023 09:52:08 AM

Reclassification of a Non-Credible Contingency Event: Loss of Sheffield 220 kV switchyard (all 220 kV buses) in Tas due to planned work

AEMO ELECTRICITY MARKET NOTICE.

Reclassification of a non-credible contingency event as a credible contingency event due to planned work.

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:TAS

Plant: Sheffield 220 kV switchyard (all 220 kV buses)

Duration: 08/12/2023 : 1000 hrs until further notice

Constraint set(s) invoked: T:SH_220_N-2

Manager NEM Real Time Operations
112057RESERVE NOTICE08/12/2023 05:21:05 AM

PDPASA - Cancellation of the Forecast Lack Of Reserve Level 1 (LOR1) in the NSW Region on 08/12/2023

AEMO ELECTRICITY MARKET NOTICE

The Forecast LOR1 condition in the NSW region advised in AEMO Electricity Market Notice No. 112052 is cancelled at 0515 hrs 08/12/2023.

Manager NEM Real Time Operations
112056RECLASSIFY CONTINGENCY08/12/2023 11:09:48 AM

Reclassification of a Non-Credible Contingency Event: South East - Tailem Bend No.1 and No.2 275 kV lines 275kV lines in SA due to severe weather warning.

AEMO ELECTRICITY MARKET NOTICE.

Reclassification of a non-credible contingency event as a credible contingency event due to severe weather warning.

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: South East - Tailem Bend No.1 and No.2 275 kV lines

Duration: 08/12/2023 11:10 hrs until further notice

Constraint set(s) invoked: S-SETB_N-2

Manager NEM Real Time Operations
112055RECLASSIFY CONTINGENCY08/12/2023 11:07:29 AM

Reclassification of a Non-Credible Contingency Event: Para-Templers West and Magill-Torrens Island A 275kV lines in SA due to severe weather warning.

AEMO ELECTRICITY MARKET NOTICE.

Reclassification of a non-credible contingency event as a credible contingency event due to severe weather warning.

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

Duration: 08/12/2023 10:50 hrs until further notice
Constraint set(s) invoked: Nil

Manager NEM Real Time Operations
112054RECLASSIFY CONTINGENCY08/12/2023 11:08:47 AM

Reclassification of a Non-Credible Contingency Event: Brinkworth-Davenport, Brinkworth-Templers West and Para-Templers West 275kV lines in SA due to severe weather warning.

AEMO ELECTRICITY MARKET NOTICE.

Reclassification of a non-credible contingency event as a credible contingency event due to severe weather warning.

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: 08/12/2023 10:50 hrs until further notice
Constraint set(s) invoked: Nil

Manager NEM Real Time Operations
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