Market Notices

90954CONSTRAINTS22/09/2021 03:08:54 PM

Update to system normal constraint equation in NSW for voltage collapse at Darlington Point

AEMO ELECTRICITY MARKET NOTICE

Refer to Market Notice 75618

TransGrid has advised AEMO on a revision to the Darlington Point to Wagga (63) 330 kV line voltage collapse limit due to upcoming connection of Hillston solar farm.

AEMO has reviewed the limit advice and will update the following constraint equation at 1000 hrs Thursday 23rd September 2021:
N^^N_NIL_2

The limit is for pre-contingent flow on 63 line. The constraint equation includes generators in south-west NSW and north-west Victoria on the left-hand side as well as Murraylink.


Mahsa Ahmadi
AEMO Operations
     
90305CONSTRAINTS09/09/2021 05:11:23 PM

Update to non-synchronous limits in South Australia

AEMO MARKET NOTICE

Refer to market notice 89336

As a part of the transition to new limits for the synchronous condensers in South Australia AEMO will increase the non-syncronous limit to 1900 MW. This limit will apply only under system normal conditions only - the current limit will apply for Davenport synchronous condenser or 275kV line outages.

No changes to the SA generator combinations will be made at this stage.

The revision to the limits will be implemented at 1000 hrs on Friday 10th September 2021 with the following changes:
The following constraint equation will be updated:
S_NIL_STRENGTH_1

and the following removed:
S_NIL_STRENGTH_2

Outage constraints will also be updated.

For more information refer to: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/related-resources/operation-of-davenport-and-robertstown-synchronous-condensers
and the limits advice: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice

For further details on this change please contact ben.blake@aemo.com.au

Ben Blake
AEMO Operations
     
90078CONSTRAINTS31/08/2021 02:07:47 PM

Update to system normal constraint equation in NSW for voltage collapse at Balranald

AEMO ELECTRICITY MARKET NOTICE

TransGrid and AEMO completed review of the X5 voltage collapse limit in south west NSW on 30/08/2021. Based on this review, the limit on pre-contingent flow on Balranald to Darlington Point (X5) 220 kV line is increased by 30MW.

The following constraint equation updated today 31/08/2021 at 07:00 .
N^^N_NIL_3

Mahsa Ahmadi
AEMO Operations
     
89836CONSTRAINTS23/08/2021 09:02:47 AM

Update to system strength requirements in North Queensland

AEMO ELECTRICITY MARKET NOTICE

Refer to market notice 89355

AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland.


A revision to the constraint equations will be implemented at 0915 hrs today.

The new combinations have now published in a limits advice document on AEMO's website: For more information refer to the new limits advice: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice

This advice contains all the combinations for Queensland for system normal cases.

The constraint equation in the Q-NIL set of the form below will be modified:


Q_NIL_STRGTH_HAUSF

For further details please contact James Lindley at james.lindley@aemo.com.au or Simon Taylor at businessdevelopment@powerlink.com.au

AEMO Operations
     
89601CONSTRAINTS16/08/2021 10:28:07 AM

Update to Victorian system normal Kerang voltage stability limit

AEMO ELECTRICITY MARKET NOTICE

Refer to Market Notice 83382

AEMO has completed a comprehensive review of a system normal voltage stability limit in north west Victoria. The revised limit manages pre-contingent flow on the Wemen to Kerang 220 kV line to avoid voltage collapse at Kerang or Wemen on loss of the Crowlands to Bulgana to Horsham or Horsham to Murra Warra to Kiamal 220 kV line. The revised limit is the result of detailed analysis and could potentially lead to higher flows on the Wemen to Kerang 220 kV line.

The revised constraint equation includes generators in south-west NSW and north-west Victoria on the left-hand side as well as Murraylink. Full details on the limits advice are to be published on 19th August 2021 on the AEMO website: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice

The revised limit will be implemented at 0800 hrs on Wednesday 18th August 2021, by updating V^^V_NIL_KGTS and removing V^^V_NIL_KGTS_2

For full details on the factors this constraint equation has now been loaded into AEMO's pre-production systems.

For further details on this constraint equation please contact terry.liu@aemo.com.au

Terry Liu
AEMO Operations
     
89355CONSTRAINTS09/08/2021 02:52:43 PM

Update to system strength requirements in North Queensland

AEMO ELECTRICITY MARKET NOTICE

Refer to market notice 86823

AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland.


A revision to the constraint equations will be implemented at 1100 hrs Tuesday 10th August 2021.

The new combinations have now published in a limits advice document on AEMO's website: For more information refer to the new limits advice: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice

This advice contains all the combinations for Queensland for system normal cases.

The constraint equations in the Q-NIL set of the form below will be modified:

Q_NIL_STRGTH_MEWF
Q_NIL_STRGTH_SMSF
Q_NIL_STRGTH_HAUSF

For further details please contact James Lindley at james.lindley@aemo.com.au or Simon Taylor at businessdevelopment@powerlink.com.au

AEMO Operations
     
86823CONSTRAINTS09/06/2021 02:23:31 PM

Update to system strength requirements in North Queensland

AEMO ELECTRICITY MARKET NOTICE

Refer to market notice 86121 and 79837

AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland.


A revision to the constraint equations will be implemented at 1000 hrs Thursday 10th June 2021.

The new combinations have now published in a limits advice document on AEMO's website: For more information refer to the new limits advice: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice

This advice contains all the combinations for Queensland for system normal cases.

The constraint equations in the Q-NIL set of the form below will be modified:

Q_NIL_STRGTH_XXX

For further details please contact James Lindley at james.lindley@aemo.com.au or Simon Taylor at businessdevelopment@powerlink.com.au

Ben Blake
AEMO Operations
86121CONSTRAINTS27/05/2021 05:35:40 PM

Update to system strength requirements in North Queensland

AEMO ELECTRICITY MARKET NOTICE

Refer to market notice 86076

AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland.

Following the events in Qld on 25th May 2021 the following system strength combinations have been implemented for north Queensland generators:

A. 3 x Stanwell + 3 x Gladstone + 2 Kareeya: 80% output at North Qld solar farms and Mt Emerald
B. 3 x Stanwell + 4 x Gladstone + 2 Kareeya: 100% output at North Qld solar farms and Mt Emerald

Where North Qld solar farms are: Clare, Collinsville, Daydream, Hamilton, Haughton, Hayman, Kidston, Ross, Rugby Run, Sun Metals and Whitsunday

The combinations in market notice 86076 have been replaced with the ones above.

The constraint equations in the Q-NIL set of the form below were modified earlier today:
Q_NIL_STRGTH_XXX

For further details please contact James Lindley at james.lindley@aemo.com.au or Simon Taylor at businessdevelopment@powerlink.com.au

Ben Blake
AEMO Operations
86076CONSTRAINTS26/05/2021 02:01:15 PM

Update to system strength requirements in North Queensland

AEMO ELECTRICITY MARKET NOTICE

Refer to market notice 84211

AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland.

Following the events in Qld on 25th May 2021 the following system strength combinations have been implemented for north Queensland generators:

1. 3 x Stanwell + 2 x Gladstone + 2 Kareeya + 1 x Barron Gorge: 50% output at North Qld solar farms and Mt Emerald
2. 3 x Stanwell + 3 x Gladstone + 2 Kareeya: 80% output at Mt Emerald WF and 50% output at North Qld solar farms
3. 3 x Stanwell + 3 x Gladstone + 2 Kareeya + Townsville GT: 80% output at North Qld solar farms and Mt Emerald

Where NQ solar farms are: Clare, Collinsville, Daydream, Hamilton, Haughton, Hayman, Kidston, Ross, Rugby Run, Sun Metals and Whitsunday


The constraint equations in the Q-NIL set of the form below were modified earlier today:
Q_NIL_STRGTH_XXX

For further details please contact James Lindley at james.lindley@aemo.com.au or Simon Taylor at businessdevelopment@powerlink.com.au

Ben Blake
AEMO Operations
X
Cookies help us improve your website experience.
By using our website, you agree to our use of cookies.
Confirm