78088PRICES SUBJECT TO REVIEW21/09/2020 01:05:14 PM

[EventId:202009211310_review] Prices for interval 21-Sep-2020 13:10 are subject to review

AEMO ELECTRICITY MARKET NOTICE

Issued by Australian Energy Market Operator Ltd at 1305 hrs on 21 September 2020

PRICES ARE SUBJECT TO REVIEW for dispatch interval 21-Sep-2020 13:10.

AEMO is reviewing these prices in accordance with:
- Clause 3.9.2B of the National Electricity Rules for Manifestly Incorrect Inputs


This is an AEMO autogenerated Market Notice.
     
78087PRICES SUBJECT TO REVIEW21/09/2020 01:00:16 PM

[EventId:202009211305_review] Prices for interval 21-Sep-2020 13:05 are subject to review

AEMO ELECTRICITY MARKET NOTICE

Issued by Australian Energy Market Operator Ltd at 1300 hrs on 21 September 2020

PRICES ARE SUBJECT TO REVIEW for dispatch interval 21-Sep-2020 13:05.

AEMO is reviewing these prices in accordance with:
- Clause 3.9.2B of the National Electricity Rules for Manifestly Incorrect Inputs


This is an AEMO autogenerated Market Notice.
     
78086MARKET INTERVENTION21/09/2020 12:58:40 PM

Update - 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 expected to be synchronised in SA from 0200 hrs 22/09/2020 to 0400 hrs 23/09/2020 are inadequate to maintain sufficient system strength in SA and hence a secure operating state.

AEMO currently estimates that, in the absence of sufficient market response 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.
AEMO will estimates the latest time to intervevne, in the absence of sufficient market response will be 1400 hrs 21/09/2020.

Manager NEM Real Time Operations
     
78085PRICES SUBJECT TO REVIEW21/09/2020 12:55:10 PM

[EventId:202009211300_review] Prices for interval 21-Sep-2020 13:00 are subject to review

AEMO ELECTRICITY MARKET NOTICE

Issued by Australian Energy Market Operator Ltd at 1255 hrs on 21 September 2020

PRICES ARE SUBJECT TO REVIEW for dispatch interval 21-Sep-2020 13:00.

AEMO is reviewing these prices in accordance with:
- Clause 3.9.2B of the National Electricity Rules for Manifestly Incorrect Inputs


This is an AEMO autogenerated Market Notice.
     
78084RECLASSIFY CONTINGENCY21/09/2020 12:24:45 PM

Reclassification 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

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: Eildon PS - Mt Beauty No.1 220 kV and Eildon PS - Mt Beauty No.2 220 kV

Duration: 21/09/2020 12:24 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations
     
78083GENERAL NOTICE21/09/2020 12:19:36 PM

Non-credible contingency event more likely to occur due to existence of abnormal conditions - SA region

AEMO ELECTRICITY MARKET NOTICE.

AEMO has identified that a non-credible contingency event is more likely to occur because of the existence of abnormal conditions, namely damaging winds in the South Australia region.

There is a possibility of severe weather impacting multiple transmission elements in its vicinity.

Conditions can change rapidly and potentially impacted plant may change. Further notices will only be published to advise of any reclassification, or when the abnormal conditions have ceased to impact the likelihood of a non-credible event occurring.

Constraint set I-VS_250 invoked at 12:25 hrs 21/09/2020 until further notice.


Manager NEM Real Time Operations
     
78082RECLASSIFY CONTINGENCY21/09/2020 11:09:51 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: 21/09/2020 11:10 hrs until further notice
Constraint set(s) invoked: Nil

Manager NEM Real Time Operations
     
78081RECLASSIFY CONTINGENCY21/09/2020 10:39:50 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: 21/09/2020 10:39

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 78078

Auto-generated on behalf of Manager NEM Real Time Operations
     
78080INTER-REGIONAL TRANSFER21/09/2020 10:11:10 AM

Inter-Regional Transfer limit variation for Victoria to South Australia (Heywood) interconnector - 21/09/2020

NEMMCO MARKET NOTICE

Inter-Regional Transfer limit variation for Victoria to South Australia (Heywood) interconnector - 21/09/2020

An unplanned outage of the Heywood No1 bus / M3 Transformer 500 kV circuit breaker in the Victoria region occured at 0938 hrs.

Constraint set V-HYCB_204_205 has now been invoked from 1000 hrs until further notice

This constraint set(s) contains equations with the following interconnectors on the LHS..

V-SA

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations
     
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