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77600CONSTRAINTS09/09/2020 11:37:10 AM
Update to Vic to NSW voltage collapse limit
AEMO ELECTRICITY MARKET NOTICE
Refer to market notice 63893
AEMO is currently revising the existing voltage collapse constraint equation for Victoria to NSW transfers for the simultaneous loss of all APD potlines. The existing equation requires a review for record low Victorian demands and high transfers to NSW. To reduce the instances of AEMO invoking discretionary limits while this review is being completed an offset of 250 MW will be applied to the existing constraint equation.
This change will occur at 1400 hrs 9th September 2020.
The following constraint equation will be modified:
V^^N_NIL_1
For further details on this new constraint equation please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
Refer to market notice 63893
AEMO is currently revising the existing voltage collapse constraint equation for Victoria to NSW transfers for the simultaneous loss of all APD potlines. The existing equation requires a review for record low Victorian demands and high transfers to NSW. To reduce the instances of AEMO invoking discretionary limits while this review is being completed an offset of 250 MW will be applied to the existing constraint equation.
This change will occur at 1400 hrs 9th September 2020.
The following constraint equation will be modified:
V^^N_NIL_1
For further details on this new constraint equation please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
77189CONSTRAINTS27/08/2020 11:25:00 AM
New West Murray issue and new limit on Murraylink
AEMO ELECTRICITY MARKET NOTICE
The West Murray region continues to be a challenging area to manage power system security. New technical issues impacting grid performance and operational stability have been identified following review of the Ararat to Crowlands 220 kV line trip on 20 August 2020.
To manage power system security AEMO will be limiting the flow on the Murraylink interconnector from SA to Vic to 95 MW. This will be implemented from 1200 hrs on 26 August 2020 with the following IDs:
Constraint Set ID: I-SVML_095
Constraint Equation ID: SVML_095
The limit will remain in place until 16 October 2020 unless otherwise notified. AEMO will provide updates on this matter as issues are further explored and potential solutions identified.
Ben Blake
AEMO Operations
The West Murray region continues to be a challenging area to manage power system security. New technical issues impacting grid performance and operational stability have been identified following review of the Ararat to Crowlands 220 kV line trip on 20 August 2020.
To manage power system security AEMO will be limiting the flow on the Murraylink interconnector from SA to Vic to 95 MW. This will be implemented from 1200 hrs on 26 August 2020 with the following IDs:
Constraint Set ID: I-SVML_095
Constraint Equation ID: SVML_095
The limit will remain in place until 16 October 2020 unless otherwise notified. AEMO will provide updates on this matter as issues are further explored and potential solutions identified.
Ben Blake
AEMO Operations
76608CONSTRAINTS11/08/2020 05:34:13 PM
Update to system strength requirements in North Queensland
AEMO ELECTRICITY MARKET NOTICE
Refer to market notice 76455
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland. A revision to the constraint equations will be implemented at 1400 hrs Wednesday 12th August 2020.
Combination 8 (in market notice 74655) has been updated to allow for 1 unit on at Callide B or Callide C (instead of 1 unit on at both).
The combination will be updated to:
8 - 2 x Stanwell, 1 x Callide B or 1 x Callide C, 3 x Gladstone, 7 x Total Stanwell+Callide+Gladstone, 2 x Kareeya: 100% output at Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday
The constraint equations in the Q-NIL set of the form below will be modified:
Q_NIL_STRGTH_XXX
Q_NIL_STRGTH_XXX_I
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
Refer to market notice 76455
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland. A revision to the constraint equations will be implemented at 1400 hrs Wednesday 12th August 2020.
Combination 8 (in market notice 74655) has been updated to allow for 1 unit on at Callide B or Callide C (instead of 1 unit on at both).
The combination will be updated to:
8 - 2 x Stanwell, 1 x Callide B or 1 x Callide C, 3 x Gladstone, 7 x Total Stanwell+Callide+Gladstone, 2 x Kareeya: 100% output at Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday
The constraint equations in the Q-NIL set of the form below will be modified:
Q_NIL_STRGTH_XXX
Q_NIL_STRGTH_XXX_I
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
76526CONSTRAINTS03/08/2020 02:47:40 PM
Update to system strength requirements in North Queensland
AEMO ELECTRICITY MARKET NOTICE
Refer to market notice 76455
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland. The constraint equations will be revised at 1400 hrs Wed 5th August 2020.
The following combination will be updated:
7 - 2 x Stanwell, 1 x Callide B or Callide C, 3 x Gladstone, 7 x Total Stanwell+Callide+Gladstone, 0 or 1 x Kareeya, > 450 MW Nth Qld load, > 250 MW Ross + FNQ load: 80% output at Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday
The following new combinations will be implemented:
10 - 2 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 8 x Total Stanwell+Callide+Gladstone, 3 x Kareeya, > 450 MW Nth Qld load, > 250 MW Ross + FNQ load: 20% output at Haughton, Sun Metals and Mt Emerald WF
11 - 2 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 8 x Total Stanwell+Callide+Gladstone, 3 x Kareeya, 1 x Barron Gorge, > 450 MW Nth Qld load, > 250 MW Ross + FNQ load: 40% output at Haughton, Sun Metals and Mt Emerald WF
If combination 7 is not met Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday are limited to 0 MW and 0 inverters.
If combinations 10 and 11 are not met Haughton, Sun Metals and Mt Emerald WF are limited to 0 MW and 0 inverters
The constraint equations in the Q-NIL set of the form below will be modified:
Q_NIL_STRGTH_XXX
Q_NIL_STRGTH_XXX_I
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
Refer to market notice 76455
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland. The constraint equations will be revised at 1400 hrs Wed 5th August 2020.
The following combination will be updated:
7 - 2 x Stanwell, 1 x Callide B or Callide C, 3 x Gladstone, 7 x Total Stanwell+Callide+Gladstone, 0 or 1 x Kareeya, > 450 MW Nth Qld load, > 250 MW Ross + FNQ load: 80% output at Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday
The following new combinations will be implemented:
10 - 2 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 8 x Total Stanwell+Callide+Gladstone, 3 x Kareeya, > 450 MW Nth Qld load, > 250 MW Ross + FNQ load: 20% output at Haughton, Sun Metals and Mt Emerald WF
11 - 2 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 8 x Total Stanwell+Callide+Gladstone, 3 x Kareeya, 1 x Barron Gorge, > 450 MW Nth Qld load, > 250 MW Ross + FNQ load: 40% output at Haughton, Sun Metals and Mt Emerald WF
If combination 7 is not met Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday are limited to 0 MW and 0 inverters.
If combinations 10 and 11 are not met Haughton, Sun Metals and Mt Emerald WF are limited to 0 MW and 0 inverters
The constraint equations in the Q-NIL set of the form below will be modified:
Q_NIL_STRGTH_XXX
Q_NIL_STRGTH_XXX_I
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
76455CONSTRAINTS27/07/2020 11:57:03 AM
Update to system strength requirements in North Queensland
AEMO ELECTRICITY MARKET NOTICE
Refer to market notice 76008
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland. A revision to the requirements will be implemented at 1400 hrs today.
The following new combination will be implemented:
7 - 2 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 8 x Total Stanwell+Callide+Gladstone, 0 or 1 x Kareeya, > 450 MW Nth Qld load, > 250 MW Ross + FNQ load: 80% output at Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday
8 - 2 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 7 x Total Stanwell+Callide+Gladstone, 2 x Kareeya: 100% output at Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday
9 - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 0 x Kareeya, > 450 MW Nth Qld load, > 250 MW Ross + FNQ load: 100% output at Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday
For all the above combinations Haughton, Sun Metals and Mt Emerald WF are limited to 0 MW and 0 inverters.
If these combinations are not met Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday generators have a limit of 0 MW and 0 inverters.
The constraint equations are:
Q_NIL_STRGTH_CLRSF, Q_NIL_STRGTH_CLRSF_I
Q_NIL_STRGTH_COLSF, Q_NIL_STRGTH_COLSF_I
Q_NIL_STRGTH_DAYSF, Q_NIL_STRGTH_DAYSF_I
Q_NIL_STRGTH_HAMSF, Q_NIL_STRGTH_HAMSF_I
Q_NIL_STRGTH_HAYSF, Q_NIL_STRGTH_HAYSF_I
Q_NIL_STRGTH_KIDSF, Q_NIL_STRGTH_KIDSF_I
Q_NIL_STRGTH_RGBSF, Q_NIL_STRGTH_RGBSF_I
Q_NIL_STRGTH_RRSF, Q_NIL_STRGTH_RRSF_I
Q_NIL_STRGTH_WHTSF, Q_NIL_STRGTH_WHTSF_I
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
Refer to market notice 76008
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland. A revision to the requirements will be implemented at 1400 hrs today.
The following new combination will be implemented:
7 - 2 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 8 x Total Stanwell+Callide+Gladstone, 0 or 1 x Kareeya, > 450 MW Nth Qld load, > 250 MW Ross + FNQ load: 80% output at Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday
8 - 2 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 7 x Total Stanwell+Callide+Gladstone, 2 x Kareeya: 100% output at Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday
9 - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 0 x Kareeya, > 450 MW Nth Qld load, > 250 MW Ross + FNQ load: 100% output at Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday
For all the above combinations Haughton, Sun Metals and Mt Emerald WF are limited to 0 MW and 0 inverters.
If these combinations are not met Clare, Collinsville, Daydream, Hamilton, Hayman, Kidston, Ross, Rugby Run, Whitsunday generators have a limit of 0 MW and 0 inverters.
The constraint equations are:
Q_NIL_STRGTH_CLRSF, Q_NIL_STRGTH_CLRSF_I
Q_NIL_STRGTH_COLSF, Q_NIL_STRGTH_COLSF_I
Q_NIL_STRGTH_DAYSF, Q_NIL_STRGTH_DAYSF_I
Q_NIL_STRGTH_HAMSF, Q_NIL_STRGTH_HAMSF_I
Q_NIL_STRGTH_HAYSF, Q_NIL_STRGTH_HAYSF_I
Q_NIL_STRGTH_KIDSF, Q_NIL_STRGTH_KIDSF_I
Q_NIL_STRGTH_RGBSF, Q_NIL_STRGTH_RGBSF_I
Q_NIL_STRGTH_RRSF, Q_NIL_STRGTH_RRSF_I
Q_NIL_STRGTH_WHTSF, Q_NIL_STRGTH_WHTSF_I
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
76008CONSTRAINTS19/06/2020 09:01:44 AM
Update to system strength requirements in North Queensland
AEMO ELECTRICITY MARKET NOTICE
Refer to market notice 75482
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland. A revision to the requirements will be implemented at 1100hrs today.
Combination 6 has been revised and is now:
3 x Stanwell, 2 x Callide B + C, 3 x Gladstone, 9 x Total Stanwell+Callide+Gladstone, 4 x Kareeya: 50% output for Sun Metals and Haughton and 65% output for Mt Emerald WF
If these combinations are not met all three generators have a limit of 0 MW and 0 inverters.
The constraint equations are: Q_NIL_STRGTH_MEWF, Q_NIL_STRGTH_HAUSF, Q_NIL_STRGTH_SMSF.
For further details please contact James Lindley at james.lindley@aemo.com.au or Simon Taylor at businessdevelopment@powerlink.com.au
Mya San
AEMO Operations
Refer to market notice 75482
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland. A revision to the requirements will be implemented at 1100hrs today.
Combination 6 has been revised and is now:
3 x Stanwell, 2 x Callide B + C, 3 x Gladstone, 9 x Total Stanwell+Callide+Gladstone, 4 x Kareeya: 50% output for Sun Metals and Haughton and 65% output for Mt Emerald WF
If these combinations are not met all three generators have a limit of 0 MW and 0 inverters.
The constraint equations are: Q_NIL_STRGTH_MEWF, Q_NIL_STRGTH_HAUSF, Q_NIL_STRGTH_SMSF.
For further details please contact James Lindley at james.lindley@aemo.com.au or Simon Taylor at businessdevelopment@powerlink.com.au
Mya San
AEMO Operations
75784CONSTRAINTS22/05/2020 11:26:07 AM
New system normal constraint equation in Victoria for voltage collapse on trip of Ballarat - Waubra - Ararat line
AEMO ELECTRICITY MARKET NOTICE
In the event of a trip of the Ballarat - Waubra - Ararat 220 kV line the Ararat, Crowlands, Bulgana, Murra Warra and Waubra wind farms will be tripped off. AEMO has completed work on a revised voltage collapse limit for this contingency which will replace the existing 600 MW cap on these generators. FCAS constraint equations have also been developed for this contingency.
The energy constraint equation includes generators in south-west NSW and north-west Victoria on the left-hand side as well as VIC1-NSW1.
The following constraint equations will be implemented at 1000 hrs Monday 25th May 2020.
N^^V_NIL_ARWBBA
F_I+GFT_TG_R6
F_I+GFT_TG_R60
F_I+GFT_TG_R5
F_MAIN++GFT_TG_R6
F_MAIN++GFT_TG_R60
F_MAIN++GFT_TG_R5
F_MAIN+GFT_TG_R6
F_MAIN+GFT_TG_R60
F_MAIN+GFT_TG_R5
The following constraint equation will be removed:
V^V_NIL_ARWBBA
For further details on these new constraint equations please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
In the event of a trip of the Ballarat - Waubra - Ararat 220 kV line the Ararat, Crowlands, Bulgana, Murra Warra and Waubra wind farms will be tripped off. AEMO has completed work on a revised voltage collapse limit for this contingency which will replace the existing 600 MW cap on these generators. FCAS constraint equations have also been developed for this contingency.
The energy constraint equation includes generators in south-west NSW and north-west Victoria on the left-hand side as well as VIC1-NSW1.
The following constraint equations will be implemented at 1000 hrs Monday 25th May 2020.
N^^V_NIL_ARWBBA
F_I+GFT_TG_R6
F_I+GFT_TG_R60
F_I+GFT_TG_R5
F_MAIN++GFT_TG_R6
F_MAIN++GFT_TG_R60
F_MAIN++GFT_TG_R5
F_MAIN+GFT_TG_R6
F_MAIN+GFT_TG_R60
F_MAIN+GFT_TG_R5
The following constraint equation will be removed:
V^V_NIL_ARWBBA
For further details on these new constraint equations please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
75618CONSTRAINTS08/05/2020 11:49:59 AM
New system normal constraint equation in NSW for voltage collapse at Darlington Point
AEMO ELECTRICITY MARKET NOTICE
Following advice from TransGrid a new/revised system normal constraint equation
TransGrid has advised AEMO of a new voltage collapse limit in southern NSW. The voltage collapse occurs at Darlington Point on loss of the Darlington Point to Wagga (63) 330 kV line. 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.
The following constraint equation will be implemented at 1000 hrs Monday 11th May 2020:
N^^N_NIL_2
For further details on this new constraint equation please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
Following advice from TransGrid a new/revised system normal constraint equation
TransGrid has advised AEMO of a new voltage collapse limit in southern NSW. The voltage collapse occurs at Darlington Point on loss of the Darlington Point to Wagga (63) 330 kV line. 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.
The following constraint equation will be implemented at 1000 hrs Monday 11th May 2020:
N^^N_NIL_2
For further details on this new constraint equation please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
75482CONSTRAINTS27/04/2020 12:59:44 PM
Update to system strength requirements in North Queensland
AEMO ELECTRICITY MARKET NOTICE
Refer to market notice 75226
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland. A revision to the requirements will be implemented at 1400 hrs today.
The revised minimum generator combinations and limits are:
1 - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 4 x Kareeya, 2 x Barron Gorge: 100% output
2 - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 4 x Kareeya, 1 x Barron Gorge: 80% output
3 - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 2 x Kareeya, 1 x Townsville GT: 80% output
4 - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 2 x Kareeya, 1 x Barron Gorge: 70% output
4H - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 2 x Kareeya, 1 x Barron Gorge, 50% or less output at Mt Emerald: 100% output for Haughton solar farm
5 - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 4 x Kareeya: 70% output
The following new combination will also be implemented:
6- 3 x Stanwell, 2 x Callide C, 3 x Gladstone, 9 x Total Stanwell+Callide+Gladstone, 4 x Kareeya: 20% output
If these combinations are not met, Mt Emerald WF, Sun metals SF and Haughton SF have a limit of 0 MW and 0 inverters.
The constraint equations are: Q_NIL_STRGTH_MEWF, Q_NIL_STRGTH_HAUSF, Q_NIL_STRGTH_SMSF.
For further details please contact James Lindley at james.lindley@aemo.com.au or Simon Taylor at businessdevelopment@powerlink.com.au
Mya San
AEMO Operations
Refer to market notice 75226
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland. A revision to the requirements will be implemented at 1400 hrs today.
The revised minimum generator combinations and limits are:
1 - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 4 x Kareeya, 2 x Barron Gorge: 100% output
2 - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 4 x Kareeya, 1 x Barron Gorge: 80% output
3 - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 2 x Kareeya, 1 x Townsville GT: 80% output
4 - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 2 x Kareeya, 1 x Barron Gorge: 70% output
4H - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 2 x Kareeya, 1 x Barron Gorge, 50% or less output at Mt Emerald: 100% output for Haughton solar farm
5 - 3 x Stanwell, 1 x Callide B, 1 x Callide C, 3 x Gladstone, 10 x Total Stanwell+Callide+Gladstone, 4 x Kareeya: 70% output
The following new combination will also be implemented:
6- 3 x Stanwell, 2 x Callide C, 3 x Gladstone, 9 x Total Stanwell+Callide+Gladstone, 4 x Kareeya: 20% output
If these combinations are not met, Mt Emerald WF, Sun metals SF and Haughton SF have a limit of 0 MW and 0 inverters.
The constraint equations are: Q_NIL_STRGTH_MEWF, Q_NIL_STRGTH_HAUSF, Q_NIL_STRGTH_SMSF.
For further details please contact James Lindley at james.lindley@aemo.com.au or Simon Taylor at businessdevelopment@powerlink.com.au
Mya San
AEMO Operations