Market Notices

54614RECLASSIFY CONTINGENCY25/07/2016 06:58:12 PM

Reclassification of a Non Credible Contingency Event: Rowville-Yallourn No 5 & No. 6 220kV Lines in Victoria due to Lightning.

AEMO ELECTRICITY MARKET NOTICE

Reclassification of a Non Credible Contingency Event: Rowville-Yallourn No 5 & No. 6 220kV Lines in Victoria due to Lightning.

Lightning is occurring near the Rowville-Yallourn No 5 & No. 6 220kV lines.

AEMO considers the simultaneous trip of those circuits to now be more likely.

Therefore AEMO has reclassified this as a credible contingency event from 1850 hrs 25/07/16 until further notice.

Constraint Set V-ROYP56_R_N-2 invoked.


Manager NEM Real Time Operations

54613NON-CONFORMANCE25/07/2016 06:45:12 PM

NON-CONFORMANCE Region NSW1 Monday, 25 July 2016

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE NSW1 Region Monday, 25 July 2016

AEMO declared a schedule generating unit non-conforming

Unit: TALWA1
Duration: 25/07/2016 18:25 to 25/07/2016 18:45
Amount: -28 MW
Constraint: NC-N_TALWA1

Auto-generated on behalf of Manager NEM Real Time Operations
54612MARKET SYSTEMS25/07/2016 05:10:46 PM

Cancellation Notice for CHG0039839 - Planned System Maintenance - Gas Supply Hub Production Site Transfer

Due to some unforeseen issues, this change is not going ahead as communicated earlier.

Please be advised the updated dates will be communicated once planned. Apologies for any inconvenience caused.


Change Number: CHG0039839

Notification issued to: Market Notice

Notification Type: Cancelled

Change Type: Normal

Service/ Component: Gas Supply Hub

Change Title: Planned System Maintenance - Gas Supply Hub Production Site Transfer - Cancelled

Change Start Date & Time: 26/07/2016 19:00:00 AEST

Change End Date & Time: 26/07/2016 21:00:00 AEST

Outage Start Date & Time: 26/07/2016 19:00:00 AEST

Outage End Date & Time: 26/07/2016 20:00:00 AEST

Change Description:

The Gas Supply Hub Production System is to be transferred to the alternate site to support maintenance activities (QLD to NSW)

Environment: Production

Participant Impact and Requirements:

All access to the Gas Supply Hub (Exchange Trading System) will be unavailable during the outage period. Please access outside this outage period.

Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
54611MARKET SYSTEMS25/07/2016 05:10:03 PM

Cancellation Notice for CHG0039804 - Planned System Maintenance - Electricity MMS Production Site Transfer (From QLD to NSW)

Due to some unforeseen issues, this change is not going ahead as communicated earlier.

Please be advised the updated dates will be communicated once planned. Apologies for any inconvenience caused.

Change Number: CHG0039804

Notification issued to: Market Notice

Notification Type: Cancelled

Change Type: Normal

Service/ Component: Electricity Market Management System

Change Title: Planned System Maintenance - Electricity MMS Production Site Transfer (From QLD to NSW) - Cancelled

Change Start Date & Time: 26/07/2016 13:00:00 AEST

Change End Date & Time: 26/07/2016 14:00:00 AEST

Outage Start Date & Time:

Outage End Date & Time:

Change Description:

The EMMS Production System is to be transferred to the alternate site to support EMMS maintenance activities.

Environment: Production

Participant Impact and Requirements:

The transfer is not expected to have any impact, however there may be disconnections to the AEMO Web Portal. Participants are reminded that this activity is not without risk and therefore if an electricity market system issue is identified after the transfer it should be reported to AEMO.

Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
54610RECLASSIFY CONTINGENCY25/07/2016 01:21:06 PM

Non-credible contingency event - SA region - 25 July 2016

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - SA region - 25 July 2016

At 1223 hrs the Waterloo - Hummocks 132 kV line tripped at the Hummocks end only.

AEMO did not instruct load shedding.

AEMO has not been advised of any disconnection of bulk electrical load.

The cause of this non credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.

AEMO will not reclassify this event as a credible contingency event.

Manager NEM Real Time Operations
54609CONSTRAINTS25/07/2016 01:18:19 PM

Updates to Victorian system normal stability constraint equations

AEMO ELECTRICITY MARKET NOTICE

The Victorian system normal constraint equations that determine Victorian export limits based on transient stability and voltage stability at Heywood for Victoria to South Australia flows will be updated to a revised formulation on 25 July 2016 after 1330 hrs. This revised formulation models the effects of higher flows on Victoria to SA on Heywood and the new series capacitors at Black Range.

The changes are to the following constraint equations :
V::N_NIL_V1
V::N_NIL_V2
V::N_NIL_Q1
V::N_NIL_Q2
V::N_NIL_S1
V::N_NIL_S2
V::N_NIL_SD
V^S_HYCP

Ben Blake
AEMO Operations
54608NON-CONFORMANCE24/07/2016 01:15:10 AM

NON-CONFORMANCE Region SA1 Sunday, 24 July 2016

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE SA1 Region Sunday, 24 July 2016

AEMO declared a schedule generating unit non-conforming

Unit: MINTARO
Duration: 24/07/2016 01:00 to 24/07/2016 01:15
Amount: 26 MW
Constraint: NC-S_MINTARO

Auto-generated on behalf of Manager NEM Real Time Operations
54607NON-CONFORMANCE23/07/2016 06:00:12 PM

NON-CONFORMANCE Region VIC1 Saturday, 23 July 2016

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE VIC1 Region Saturday, 23 July 2016

AEMO declared a schedule generating unit non-conforming

Unit: HWPS5
Duration: 23/07/2016 17:50 to 23/07/2016 18:00
Amount: -60 MW
Constraint: NC-V_HWPS5

Auto-generated on behalf of Manager NEM Real Time Operations
54606RECLASSIFY CONTINGENCY23/07/2016 03:27:53 PM

Cancellation of the reclassification of a Non-Credible Contingency Event: Rowville-Yallourn No 5 & No. 6 220kV Lines in Victoria due to lightning.

AEMO ELECTRICITY MARKET NOTICE

Cancellation of the reclassification of a Non-Credible Contingency Event: Rowville-Yallourn No 5 & No. 6 220kV Lines in Victoria due to lightning.

Refer AEMO Electricity Market Notice 54605

There is no longer any lightning activity in the vicinity of the Rowville-Yallourn No 5 & No. 6 220kV lines.

AEMO has cancelled the reclassification of the simultaneous trip of those circuits as a credible contingency event at 1530 hrs.

Constraint Set V-ROYP56_R_N-2 revoked.


Manager NEM Real Time Operations


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