Market Notices

60028INTER-REGIONAL TRANSFER25/11/2017 02:00:07 PM

Management of South Australia Power System Security - Severe Weather Warning - Saturday, 25 November 2017

AEMO ELECTRICITY MARKET NOTICE

Management of South Australia Power System Security - Severe Weather Warning - Saturday, 25 November 2017

AEMO has determined that the severe weather warning issued by the BOM presents added risks to the power system in South Australia.

To manage power system security, AEMO has applied a network constraint to limit the flow on the VIC-SA interconnector in the Victoria to South Australia direction.

The following constraint set was invoked at 1355 hrs and will remain in place until further notice.

I-VS_250

The constraint set contains equations with the following interconnectors on the LHS.
V-SA


Manager NEM Real Time Operations

60027RECLASSIFY CONTINGENCY25/11/2017 01:47:37 PM

Reclassification of a Non-Credible Contingency Event: Dederang - Glenrowan No. 1 220 kV line and Dederang - Glenrowan No. 3 220 kV line in VIC 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: VIC

Lines: Dederang - Dederang - Glenrowan No. 1 220 kV line and Dederang - Glenrowan No. 3 220 kV line.

Duration: 1350 hrs until further notice

Constraint set(s) invoked: V-DDGN_N-2

Manager NEM Real Time Operations


60026RECLASSIFY CONTINGENCY25/11/2017 12:09:42 PM

Reclassification of a Non-Credible Contingency Event: Chapel Street-Liapootah No.1 and No.2 220 kV lines in TAS 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: TAS

Lines: Chapel Street-Liapootah No.1 and No.2 220 kV lines

Duration: 1200 hrs until further notice

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


Manager NEM Real Time Operations
60025RECLASSIFY CONTINGENCY25/11/2017 12:01:11 AM

Cancellation of a Non-Credible Contingency Event: Eildon - Mt Beauty No. 1 and No. 2 220kV lines in VIC 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: VIC

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

Cancellation time: 25/11/2017 00:00
Constraint set(s) revoked: Nil

Refer AEMO Electricity Market Notice 60024

Manager NEM Real Time Operations
60024RECLASSIFY CONTINGENCY24/11/2017 11:02:38 PM

Reclassification of a Non-Credible Contingency Event: Eildon - Mt Beauty No. 1 and No. 2 220kV lines in VIC 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: VIC

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

Duration: 24/11/2017 23:00 until further notice
Constraint set(s) invoked: Nil

Manager NEM Real Time Operations
60023RECLASSIFY CONTINGENCY24/11/2017 08:49:31 PM

Cancellation of a Non-Credible Contingency Event: Eildon - Mt Beauty No. 1 and No. 2 220kV lines in VIC 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: VIC

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

Cancellation time: 24/11/2017 20:45
Constraint set(s) revoked: Nil

Refer AEMO Electricity Market Notice 60017

Manager NEM Real Time Operations
60022RECLASSIFY CONTINGENCY24/11/2017 08:42:33 PM

Cancellation of a Non-Credible Contingency Event: Farrell - Sheffield No. 1 and No. 2 220kV lines in TAS 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: TAS

Lines: Farrell - Sheffield No. 1 and No. 2 220kV lines

Cancellation time: 24/11/2017 20:35
Constraint set(s) revoked: T-FASH_N-2_HM_C_2, T-NIL_WCP_CLOSE

Refer AEMO Electricity Market Notice 60013

Manager NEM Real Time Operations
60021INTER-REGIONAL TRANSFER24/11/2017 08:32:32 PM

Cancellation - Management of South Australia Power System Security - Severe Weather Warning - 24/11/2017

AEMO ELECTRICITY MARKET NOTICE

Cancellation - management of South Australia power system security - severe weather warning - 24/11/2017

Refer AEMO Electricity Market Notice 60019

The severe weather warning issued by the BOM has been cancelled.

The following constraint set was revoked at 2030 hrs 24/11/2017.

I-VS_250

Manager NEM Real Time Operations
60020RECLASSIFY CONTINGENCY24/11/2017 08:13:12 PM

Cancellation of a Non-Credible Contingency Event: Dederang - Glenrowan No. 1 and No. 3 220kV lines in VIC 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: VIC

Lines: Dederang - Glenrowan No. 1 and No. 3 220kV lines

Cancellation time: 24/11/2017 20:00
Constraint set(s) revoked: V-DDGN_N-2

Refer AEMO Electricity Market Notice 60016

Manager NEM Real Time Operations
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