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93791PROTECTED EVENT11/01/2022 08:18:36 PM
Cancellation: Protected event advice - South Australia region.
AEMO ELECTRICITY MARKET NOTICE.
AEMO has identified that the conditions of the following protected event are no longer met.
Protected event: the loss of multiple transmission elements causing generation disconnection in the South Australia region during periods where destructive wind conditions are forecast by the Bureau of Meteorology.
Cancellation: 11/01/2022 20:00 hrs
Constraint set(s) revoked: I-VS_250
Refer AEMO Electricity Market Notice 93779
Manager NEM Real Time Operations
AEMO has identified that the conditions of the following protected event are no longer met.
Protected event: the loss of multiple transmission elements causing generation disconnection in the South Australia region during periods where destructive wind conditions are forecast by the Bureau of Meteorology.
Cancellation: 11/01/2022 20:00 hrs
Constraint set(s) revoked: I-VS_250
Refer AEMO Electricity Market Notice 93779
Manager NEM Real Time Operations
93779PROTECTED EVENT11/01/2022 07:26:54 PM
Protected event advice - South Australia region.
AEMO ELECTRICITY MARKET NOTICE.
AEMO has identified that the conditions of the following protected event will be met from the time specified in this notice.
Protected event: the loss of multiple transmission elements causing generation disconnection in the South Australia region during periods where destructive wind conditions are forecast by the Bureau of Meteorology.
Duration: 11/01/2022 19:20 until further notice
AEMO will take action to manage the power system for the impact of the protected event.
Constraint set(s) invoked: I-VS_250
Manager NEM Real Time Operations
AEMO has identified that the conditions of the following protected event will be met from the time specified in this notice.
Protected event: the loss of multiple transmission elements causing generation disconnection in the South Australia region during periods where destructive wind conditions are forecast by the Bureau of Meteorology.
Duration: 11/01/2022 19:20 until further notice
AEMO will take action to manage the power system for the impact of the protected event.
Constraint set(s) invoked: I-VS_250
Manager NEM Real Time Operations
92840CONSTRAINTS01/12/2021 11:21:45 AM
Update to system normal constraint equation in NSW for voltage collapse at Darlington Point
AEMO ELECTRICITY MARKET NOTICE
Refer to Market Notice 90954
TransGrid has advised AEMO of a revision to the Darlington Point to Wagga (63) 330 kV line voltage collapse limit due to changes in a control scheme in the area. With this change the current voltage collapse limit will be replaced by a transient voltage limit - and allow for increased flows on 63 line.
AEMO has reviewed the limit advice and will make the following constraint equation changes at 1300 hrs Wednesday 1st December 2021:
Add - N::N_NIL_63
Remove - 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.
Ben Blake
AEMO Operations
Refer to Market Notice 90954
TransGrid has advised AEMO of a revision to the Darlington Point to Wagga (63) 330 kV line voltage collapse limit due to changes in a control scheme in the area. With this change the current voltage collapse limit will be replaced by a transient voltage limit - and allow for increased flows on 63 line.
AEMO has reviewed the limit advice and will make the following constraint equation changes at 1300 hrs Wednesday 1st December 2021:
Add - N::N_NIL_63
Remove - 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.
Ben Blake
AEMO Operations
92769CONSTRAINTS26/11/2021 04:04:18 PM
Updated generator combinations for SA for four synchronous condenser operation
AEMO MARKET NOTICE
Refer to market notice 92718
AEMO has published 15 new generator combinations for four synchronous condenser operation in South Australia.
These new 15 combinations (as well as the 6 published previously) apply under system normal, risk of islanding and SA island conditions.
For more details on the new combinations please refer to the updated limits advice (which was been published today):
https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
For further details please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
Refer to market notice 92718
AEMO has published 15 new generator combinations for four synchronous condenser operation in South Australia.
These new 15 combinations (as well as the 6 published previously) apply under system normal, risk of islanding and SA island conditions.
For more details on the new combinations please refer to the updated limits advice (which was been published today):
https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
For further details please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
92718CONSTRAINTS25/11/2021 04:33:15 PM
Update to system strength limit advice for SA - four synchronous condenser operation
AEMO ELECTRICITY MARKET NOTICE
Refer to market notice 91942
AEMO and ElectraNet have been working on moving to four synchronous condenser operation in South Australia. Due to current market and power system conditions AEMO is moving to four synchronous condenser operation for system normal conditions as of 1900hrs 25th November 2021.
Refer to the six generator combinations in Table 3 of the current limits advice (v39) here:
https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
Further SA generator combinations will be published tomorrow.
SA operation factsheet:
https://www.aemo.com.au/-/media/files/electricity/nem/security_and_reliability/congestion-information/sa-operation-with-minimum-2-synchronous-generators-aemo-factsheet.pdf?la=en
For further details please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
Refer to market notice 91942
AEMO and ElectraNet have been working on moving to four synchronous condenser operation in South Australia. Due to current market and power system conditions AEMO is moving to four synchronous condenser operation for system normal conditions as of 1900hrs 25th November 2021.
Refer to the six generator combinations in Table 3 of the current limits advice (v39) here:
https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
Further SA generator combinations will be published tomorrow.
SA operation factsheet:
https://www.aemo.com.au/-/media/files/electricity/nem/security_and_reliability/congestion-information/sa-operation-with-minimum-2-synchronous-generators-aemo-factsheet.pdf?la=en
For further details please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
91942CONSTRAINTS25/10/2021 02:33:10 PM
Updated system strength limit advice for SA - any two synchronous condensers
AEMO MARKET NOTICE
Refer to market notices 84211 and 89336
Following new advice from ElectraNet AEMO has published a new version of the SA system strength limits advice. The new advice is that the combinations for two Davenport synchronous condensers can be updated to be for any two synchronous condensers at either Davenport or Robertstown.
For more information refer to the updated limits advice (which has been published today):
https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
For further details on this constraint equation please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
Refer to market notices 84211 and 89336
Following new advice from ElectraNet AEMO has published a new version of the SA system strength limits advice. The new advice is that the combinations for two Davenport synchronous condensers can be updated to be for any two synchronous condensers at either Davenport or Robertstown.
For more information refer to the updated limits advice (which has been published today):
https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
For further details on this constraint equation please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
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
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
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
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