Market Notices

60037RECLASSIFY CONTINGENCY26/11/2017 11:13:14 AM

Reclassification of a Non-Credible Contingency Event: Eildon - Mt Beauty (No.1) 220 kV line and Eildon-Mt Beauty (No.2) 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: Eildon - Mt Beauty (No.1) line and Eildon-Mt Beauty (No.2) line

Duration: 1045 hrs until further notice.

Constraint set(s) invoked: Nil

Manager NEM Real Time Operations

60036RECLASSIFY CONTINGENCY26/11/2017 07:57:14 AM

Reclassification of a Non Credible Contingency Event: South East No. 2 275/132 kV Transformer and both the South East No.1 and No.2 275 kV SVCs.

AEMO ELECTRICITY MARKET NOTICE

Reclassification of a Non Credible Contingency Event: South East No. 2 275/132 kV Transformer and both the South East No.1 and No.2 275 kV SVCs.

During the planned outage of the South East No.1 275/132 kV Transformer the backup diesel will not be fast enough to prevent the SVC cooling systems from tripping if the South East No.2 275 kV Transformer trips.

AEMO has reclassified the simultaneous trip of the South East No. 2 275/132 kV Transformer and both South East SVCs to be a credible contingency event for the duration of the No.1 Transformer outage starting at 0746 hrs and expected to finish at 1530 hrs 26/11/2017.

Refer to AEMO Network Outage Scheduler (NOS) for outage details.

Manager NEM Real Time Operations


60035INTER-REGIONAL TRANSFER25/11/2017 09:53:50 PM

Cancellation - management of South Australia power system security - severe weather warning - 25/11/2017

AEMO ELECTRICITY MARKET NOTICE

Cancellation - management of South Australia power system security - severe weather warning - 25/11/2017

Refer AEMO Electricity Market Notice 60028

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

The following constraint set was revoked at 2155 hrs 25/11/2017.

I-VS_250.

Manager NEM Real Time Operations
60034RECLASSIFY CONTINGENCY25/11/2017 08:59:47 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: 2100 hrs 25/11/2017
Constraint set(s) revoked: V-DDGN_N-2

Refer AEMO Electricity Market Notice 60027

Manager NEM Real Time Operations
60033RECLASSIFY CONTINGENCY25/11/2017 08:58:40 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: 2100 hrs 25/11/2017
Constraint set(s) revoked: Nil

Refer AEMO Electricity Market Notice 60029

Manager NEM Real Time Operations
60032RECLASSIFY CONTINGENCY25/11/2017 07:02:44 PM

Cancellation 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.

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

Cancellation time: 1905 hrs

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

Refer AEMO Electricity Market Notice 60031

Manager NEM Real Time Operations
60031RECLASSIFY CONTINGENCY25/11/2017 04:05:46 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: 1600 hrs until further notice

Constraint set invoked: T-CSLI_N-2


Manager NEM Real Time Operations

60030RECLASSIFY CONTINGENCY25/11/2017 03:45:17 PM

Cancellation 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.

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

Cancellation time: 1530 hrs

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

Refer AEMO Electricity Market Notice 60026

Manager NEM Real Time Operations


60029RECLASSIFY CONTINGENCY25/11/2017 02:07:40 PM

Reclassification of a Non-Credible Contingency Event: Eildon - Mt Beauty (No.1) 220 kV line and Eildon-Mt Beauty (No.2) 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: Eildon - Mt Beauty (No.1) line and Eildon-Mt Beauty (No.2) line

Duration: 1350 hrs until further notice.

Constraint set(s) invoked: Nil

Manager NEM Real Time Operations

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