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71869CONSTRAINTS17/12/2019 05:59:11 PM
Increase in Heywood from SA to Vic limit from 500 to 550 MW
AEMO ELECTRICITY MARKET NOTICE
As a part of the Heywood Interconnector upgrade the increase in the upper transfer limit from SA to Victoria is dependent on the commissioning of the over frequency generation scheme (OFGS). The OFGS has now been commissioned AEMO has completed and detailed analysis of power system limits at higher transfers.
AEMO will increase the Heywood limit from SA to Vic (from the current 500 MW) to 550 MW and the combined (Heywood and Murraylink) SA to Vic limit from 650 to 700 MW at 1000 hrs on 18 Dec 2019.
The following constraint sets will be revoked:
I-SV_500_TEST
I-SVS_650_TEST
The following constraint sets will be invoked:
I-SV_550_TEST
I-SVS_700_TEST
For more information on the increase:
ElectraNet 2019 APR: https://www.electranet.com.au/what-we-do/network/regulated-network-reports-and-studies/
Inter-network test program: https://www.aemo.com.au/media/Files/Electricity/Consultations/2015/HYTS%20interconnector%20upgrade%20internetwork.pdf
Ben Blake
AEMO Operations
As a part of the Heywood Interconnector upgrade the increase in the upper transfer limit from SA to Victoria is dependent on the commissioning of the over frequency generation scheme (OFGS). The OFGS has now been commissioned AEMO has completed and detailed analysis of power system limits at higher transfers.
AEMO will increase the Heywood limit from SA to Vic (from the current 500 MW) to 550 MW and the combined (Heywood and Murraylink) SA to Vic limit from 650 to 700 MW at 1000 hrs on 18 Dec 2019.
The following constraint sets will be revoked:
I-SV_500_TEST
I-SVS_650_TEST
The following constraint sets will be invoked:
I-SV_550_TEST
I-SVS_700_TEST
For more information on the increase:
ElectraNet 2019 APR: https://www.electranet.com.au/what-we-do/network/regulated-network-reports-and-studies/
Inter-network test program: https://www.aemo.com.au/media/Files/Electricity/Consultations/2015/HYTS%20interconnector%20upgrade%20internetwork.pdf
Ben Blake
AEMO Operations
69182PROTECTED EVENT09/08/2019 12:42:52 AM
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: 08/08/2019 23:55 hrs
Constraint set(s) revoked: I-VS_250
Refer AEMO Electricity Market Notices 69177
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: 08/08/2019 23:55 hrs
Constraint set(s) revoked: I-VS_250
Refer AEMO Electricity Market Notices 69177
Manager NEM Real Time Operations
69177PROTECTED EVENT08/08/2019 11:51:36 AM
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: 08/08/2019 12:00 hrs 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: 08/08/2019 12:00 hrs 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
66819RESERVE NOTICE25/01/2019 01:50:40 PM
Cancellation of Actual (LOR3) condition in the Vic region - 25/01/2019
AEMO ELECTRICITY MARKET NOTICE
Cancellation of Actual (LOR3) condition in the Vic region - 25/01/2019
The Actual LOR3 Condition in the Vic region advised in AEMO Electricity Market Notice No.66768 is cancelled at 1350 hrs 25/01/219.
Manager NEM Real Time Operations
Cancellation of Actual (LOR3) condition in the Vic region - 25/01/2019
The Actual LOR3 Condition in the Vic region advised in AEMO Electricity Market Notice No.66768 is cancelled at 1350 hrs 25/01/219.
Manager NEM Real Time Operations
66768RESERVE NOTICE25/01/2019 11:04:54 AM
Actual Lack Of Reserve Level 3 (LOR3) in the Vic region - 25/01/2019
AEMO ELECTRICITY MARKET NOTICE
Actual Lack Of Reserve Level 3 (LOR3) in the Vic region - 25/01/2019
Customer load shedding of non-interruptible load is occurring in the Vic region as a result of a shortfall of available capacity reserves.
An Actual LOR3 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the Vic region from 1100 hrs.
The Actual LOR3 condition is forecast to exist until 1500 hrs.
The load interrupted is 100 MW at 1100 hrs 25/01/2019. This may be varied during the actual LOR3 period.
Manager NEM Real Time Operations
Actual Lack Of Reserve Level 3 (LOR3) in the Vic region - 25/01/2019
Customer load shedding of non-interruptible load is occurring in the Vic region as a result of a shortfall of available capacity reserves.
An Actual LOR3 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the Vic region from 1100 hrs.
The Actual LOR3 condition is forecast to exist until 1500 hrs.
The load interrupted is 100 MW at 1100 hrs 25/01/2019. This may be varied during the actual LOR3 period.
Manager NEM Real Time Operations
66708RESERVE NOTICE24/01/2019 08:00:58 PM
Cancellation of Actual (LOR3) condition in the Vic region - 24/01/2019
AEMO ELECTRICITY MARKET NOTICE
Cancellation of Actual (LOR3) condition in the Vic region - 24/01/2019
The Actual LOR3 Condition in the Vic region advised in AEMO Electricity Market Notice No.66670 is cancelled at 2000 hrs 24/01/2019.
Manager NEM Real Time Operations
Cancellation of Actual (LOR3) condition in the Vic region - 24/01/2019
The Actual LOR3 Condition in the Vic region advised in AEMO Electricity Market Notice No.66670 is cancelled at 2000 hrs 24/01/2019.
Manager NEM Real Time Operations
66670RESERVE NOTICE24/01/2019 06:14:44 PM
Actual Lack Of Reserve Level 3 (LOR3) in the Vic region - 24/01/2019
AEMO ELECTRICITY MARKET NOTICE
Actual Lack Of Reserve Level 3 (LOR3) in the Vic region - 24/01/2019
Customer load shedding of non-interruptible load is occurring in the Vic region as a result of a shortfall of available capacity reserves.
An Actual LOR3 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the Vic region from 1810 hrs.
The Actual LOR3 condition is forecast to exist until 1910 hrs.
The maximum load to be interrupted is 266MW at 1810 hrs 24/01/2019
Manager NEM Real Time Operations
Actual Lack Of Reserve Level 3 (LOR3) in the Vic region - 24/01/2019
Customer load shedding of non-interruptible load is occurring in the Vic region as a result of a shortfall of available capacity reserves.
An Actual LOR3 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the Vic region from 1810 hrs.
The Actual LOR3 condition is forecast to exist until 1910 hrs.
The maximum load to be interrupted is 266MW at 1810 hrs 24/01/2019
Manager NEM Real Time Operations
65417CONSTRAINTS15/11/2018 01:43:40 PM
Reclassification of QNI SPAR as a credible contingency
AEMO MARKET NOTICE
After 25th August 2018 AEMO reclassified the loss of NSW to Qld (QNI) interconnected as a credible contingency when lightning is nearby (as per SO_OP_3715 section 11.4). The limits on QNI under this reclassification are based on the available FCAS in Queensland and NSW - normally the limit is between 300-400 MW in either direction.
Following an investigation TransGrid and Powerlink have made setting changes to the auto reclose settings on QNI and provided AEMO with a new reclassification limit on QNI. Now under similar conditions to 25th August the tripped single phases on QNI would reclose and NSW and Qld is not expected to separate.
The new limit of 850 MW will be activated at 1400 hrs November 15th 2018 for use in future reclassifications of QNI for a single phase fault on both circuits.
Constraint Set:
I-QNI_ONE_PHASE_N-2
Ben Blake
AEMO Operations
After 25th August 2018 AEMO reclassified the loss of NSW to Qld (QNI) interconnected as a credible contingency when lightning is nearby (as per SO_OP_3715 section 11.4). The limits on QNI under this reclassification are based on the available FCAS in Queensland and NSW - normally the limit is between 300-400 MW in either direction.
Following an investigation TransGrid and Powerlink have made setting changes to the auto reclose settings on QNI and provided AEMO with a new reclassification limit on QNI. Now under similar conditions to 25th August the tripped single phases on QNI would reclose and NSW and Qld is not expected to separate.
The new limit of 850 MW will be activated at 1400 hrs November 15th 2018 for use in future reclassifications of QNI for a single phase fault on both circuits.
Constraint Set:
I-QNI_ONE_PHASE_N-2
Ben Blake
AEMO Operations
64203CONSTRAINTS13/09/2018 03:50:30 PM
Updated generator combinations for SA system strength
AEMO MARKET NOTICE
AEMO is continuing to investigate system strength requirements in South Australia.
AEMO has identified 14 additional combinations which meet minimum system strength requirements in South Australia.
New combinations:
LOW_39 - 1 x Pelican Point GT + ST + either Quarantine 5 or Dry Creek 1-3 + Mintaro
LOW_40 - 1 x Pelican Point GT + ST + Quarantine 5 + Dry Creek 1-3
LOW_41 - 2 x Pelican Point GT + ST + Osborne GT & ST
LOW_42 - 2 x Pelican Point GT + ST + Mintaro
LOW_43 - 2 x Pelican Point GT + ST + either Quarantine 5 or Dry Creek 1-3
LOW_44 - 4 x Torrens Island A unit + 1 x Pelican Point GT + ST
LOW_45A - 4 x Torrens Island A unit + Mintaro
LOW_45B - 4 x Torrens Island B unit + Mintaro
LOW_46 - 3 x Torrens Island A unit + 1 x Pelican Point GT + ST + Mintaro
LOW_47 - 3 x Torrens Island A unit + either Quarantine 5 or Dry Creek 1-3 + Mintaro
LOW_48A - 1 x Torrens Island A unit + Osborne GT & ST + either Quarantine 5 or Dry Creek 1-3 + Mintaro
LOW_48B - 1 x Torrens Island B unit + Osborne GT & ST + either Quarantine 5 or Dry Creek 1-3 + Mintaro
LOW_49 - 1 x Torrens Island A unit + 1 x Torrens Island B unit + Quarantine 5 + Dry Creek 1-3 + Mintaro
LOW_50 - 2 x Torrens Island A unit + Quarantine 5 + Dry Creek 1-3 + Mintaro
Replaced combinations:
LOW_25 - 3 x Torrens Island B unit + either Quarantine 5 or Dry Creek 1-3 + Mintaro
LOW_26 - 1 x Torrens Island A unit + 1 x Torrens Island B unit + Osborne GT & ST + Mintaro
LOW_30 - 2 x Torrens Island A unit + Osborne GT & ST + Mintaro
LOW_35 - 1 x Pelican Point GT + ST + Osborne GT & ST + Mintaro
Removed combinations:
LOW_23B
LOW_32
HIGH_14
For more information refer to the updated limits advice:
https://www.aemo.com.au/-/media/Files/Electricity/NEM/Security_and_Reliability/Congestion-Information/2018/Transfer-Limit-Advice---South-Australian-System-Strength.pdf
A further update to this advice is planned before the end of October 2018.
Ben Blake
AEMO Operations
AEMO is continuing to investigate system strength requirements in South Australia.
AEMO has identified 14 additional combinations which meet minimum system strength requirements in South Australia.
New combinations:
LOW_39 - 1 x Pelican Point GT + ST + either Quarantine 5 or Dry Creek 1-3 + Mintaro
LOW_40 - 1 x Pelican Point GT + ST + Quarantine 5 + Dry Creek 1-3
LOW_41 - 2 x Pelican Point GT + ST + Osborne GT & ST
LOW_42 - 2 x Pelican Point GT + ST + Mintaro
LOW_43 - 2 x Pelican Point GT + ST + either Quarantine 5 or Dry Creek 1-3
LOW_44 - 4 x Torrens Island A unit + 1 x Pelican Point GT + ST
LOW_45A - 4 x Torrens Island A unit + Mintaro
LOW_45B - 4 x Torrens Island B unit + Mintaro
LOW_46 - 3 x Torrens Island A unit + 1 x Pelican Point GT + ST + Mintaro
LOW_47 - 3 x Torrens Island A unit + either Quarantine 5 or Dry Creek 1-3 + Mintaro
LOW_48A - 1 x Torrens Island A unit + Osborne GT & ST + either Quarantine 5 or Dry Creek 1-3 + Mintaro
LOW_48B - 1 x Torrens Island B unit + Osborne GT & ST + either Quarantine 5 or Dry Creek 1-3 + Mintaro
LOW_49 - 1 x Torrens Island A unit + 1 x Torrens Island B unit + Quarantine 5 + Dry Creek 1-3 + Mintaro
LOW_50 - 2 x Torrens Island A unit + Quarantine 5 + Dry Creek 1-3 + Mintaro
Replaced combinations:
LOW_25 - 3 x Torrens Island B unit + either Quarantine 5 or Dry Creek 1-3 + Mintaro
LOW_26 - 1 x Torrens Island A unit + 1 x Torrens Island B unit + Osborne GT & ST + Mintaro
LOW_30 - 2 x Torrens Island A unit + Osborne GT & ST + Mintaro
LOW_35 - 1 x Pelican Point GT + ST + Osborne GT & ST + Mintaro
Removed combinations:
LOW_23B
LOW_32
HIGH_14
For more information refer to the updated limits advice:
https://www.aemo.com.au/-/media/Files/Electricity/NEM/Security_and_Reliability/Congestion-Information/2018/Transfer-Limit-Advice---South-Australian-System-Strength.pdf
A further update to this advice is planned before the end of October 2018.
Ben Blake
AEMO Operations