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126023CONSTRAINTS28/03/2025 03:39:03 PM
Update to Victorian system normal Kerang voltage stability limit
AEMO ELECTRICITY MARKET NOTICE
AEMO has completed a review of a system normal voltage stability limit in north west Victoria as a result of commissioning of BESS at Koorangie. The revised limit manages pre-contingent flow on the Wemen to Koorangie 220 kV line to avoid voltage collapse at Koorangie, Kerang or Wemen on loss of the Crowlands to Bulgana to Horsham or Horsham to Murra Warra to Kiamal 220 kV line. The revised constraint equation includes the generators in south-west NSW and north-west Victoria on the left-hand side as well as Murraylink and V-SA. Full details on the limits advice are to be published shortly 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 0900 hrs on Monday 31st March 2025, by updating V^^V_NIL_KGTS.
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
AEMO has completed a review of a system normal voltage stability limit in north west Victoria as a result of commissioning of BESS at Koorangie. The revised limit manages pre-contingent flow on the Wemen to Koorangie 220 kV line to avoid voltage collapse at Koorangie, Kerang or Wemen on loss of the Crowlands to Bulgana to Horsham or Horsham to Murra Warra to Kiamal 220 kV line. The revised constraint equation includes the generators in south-west NSW and north-west Victoria on the left-hand side as well as Murraylink and V-SA. Full details on the limits advice are to be published shortly 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 0900 hrs on Monday 31st March 2025, by updating V^^V_NIL_KGTS.
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
125081CONSTRAINTS25/02/2025 08:31:51 AM
Yass to Wagga control scheme change - removal system normal constraint equations in NSW managing 990, 991 and 970 132kV lines
AEMO ELECTRICITY MARKET NOTICE
Transgrid has advised AEMO of an update to the Yass overload trip scheme. The scheme is normally armed managing line flow on 990, 991, 970 132kV lines and it is now operating both directions of flow from Wagga to Yass.
Based on this advice, the following constraint equations will be removed from the NSW system normal constraint sets N-NIL and N-NIL_991, effective immediately.
N>>NIL_970_051
N>>NIL_990_051
N>>NIL_991_051
Ben Blake
AEMO Operations
Transgrid has advised AEMO of an update to the Yass overload trip scheme. The scheme is normally armed managing line flow on 990, 991, 970 132kV lines and it is now operating both directions of flow from Wagga to Yass.
Based on this advice, the following constraint equations will be removed from the NSW system normal constraint sets N-NIL and N-NIL_991, effective immediately.
N>>NIL_970_051
N>>NIL_990_051
N>>NIL_991_051
Ben Blake
AEMO Operations
124575RESERVE NOTICE12/02/2025 07:42:14 PM
Cancellation of Actual (LOR2) condition in the SA region - 12/02/2025
AEMO ELECTRICITY MARKET NOTICE
Cancellation of Actual (LOR2) condition in the SA region - 12/02/2025
The Actual LOR2 Condition in the SA Region advised in AEMO Electricity Market Notice No.124573 is cancelled at 1940 hrs 12/02/2025.
Manager NEM Real Time Operations
Cancellation of Actual (LOR2) condition in the SA region - 12/02/2025
The Actual LOR2 Condition in the SA Region advised in AEMO Electricity Market Notice No.124573 is cancelled at 1940 hrs 12/02/2025.
Manager NEM Real Time Operations
124573RESERVE NOTICE12/02/2025 07:15:02 PM
Actual Lack Of Reserve Level 2 (LOR2) in the SA region - 12/02/2025
AEMO ELECTRICITY MARKET NOTICE
Actual Lack Of Reserve Level 2 (LOR2) in the SA region - 12/02/2025
An Actual LOR2 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the SA region from 1900 hrs.
The Actual LOR2 condition is forecast to exist until 1930 hrs
The capacity reserve required is 245 MW
The minimum reserve available is 107 MW
AEMO is seeking an immediate market response.
An insufficient market response may require AEMO to implement a AEMO intervention event.
Manager NEM Real Time Operations
Actual Lack Of Reserve Level 2 (LOR2) in the SA region - 12/02/2025
An Actual LOR2 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the SA region from 1900 hrs.
The Actual LOR2 condition is forecast to exist until 1930 hrs
The capacity reserve required is 245 MW
The minimum reserve available is 107 MW
AEMO is seeking an immediate market response.
An insufficient market response may require AEMO to implement a AEMO intervention event.
Manager NEM Real Time Operations
124047CONSTRAINTS04/02/2025 09:32:40 AM
Update to system strength requirements in North Queensland
AEMO ELECTRICITY MARKET NOTICE
Refer to market notice 121468
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland.
The system normal equations have been revised to remove Gladstone >=1 requirement.
A revision to the constraint equations will be implemented at 1200 hrs on Tuesday 4th February 2025.
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. Additional information has been included in the limit advice to clarify the requirement to disconnect all inverters/turbines under certain system conditions.
The constraint equation in the Q-NIL set of the form below will be modified:
-Q_NIL_STRGTH_xxxx
-Q_NIL_STRGTH_xxxx_I
AEMO Operations
Refer to market notice 121468
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland.
The system normal equations have been revised to remove Gladstone >=1 requirement.
A revision to the constraint equations will be implemented at 1200 hrs on Tuesday 4th February 2025.
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. Additional information has been included in the limit advice to clarify the requirement to disconnect all inverters/turbines under certain system conditions.
The constraint equation in the Q-NIL set of the form below will be modified:
-Q_NIL_STRGTH_xxxx
-Q_NIL_STRGTH_xxxx_I
AEMO Operations
123598RESERVE NOTICE22/01/2025 07:44:15 PM
Cancellation of Actual (LOR2) condition in the QLD region - 22/01/2025
AEMO ELECTRICITY MARKET NOTICE
Cancellation of Actual (LOR2) condition in the QLD region - 22/01/2025
The Actual LOR2 Condition in the QLD Region advised in AEMO Electricity Market Notice No.123594 is cancelled at 1945 hrs 22/01/2025.
Manager NEM Real Time Operations
Cancellation of Actual (LOR2) condition in the QLD region - 22/01/2025
The Actual LOR2 Condition in the QLD Region advised in AEMO Electricity Market Notice No.123594 is cancelled at 1945 hrs 22/01/2025.
Manager NEM Real Time Operations
123594RESERVE NOTICE22/01/2025 06:43:09 PM
Actual Lack Of Reserve Level 2 (LOR2) in the QLD region - 22/01/2025
AEMO ELECTRICITY MARKET NOTICE
Actual Lack Of Reserve Level 2 (LOR2) in the QLD region - 22/01/2025
An Actual LOR2 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the QLD region from 1830 hrs.
The Actual LOR2 condition is forecast to exist until 1900 hrs.
The forecast capacity reserve requirement is 515 MW.
The minimum capacity reserve available is 395 MW.
AEMO is seeking an immediate market response.
An insufficient market response may require AEMO to implement an AEMO intervention event.
Manager NEM Real Time Operations
Actual Lack Of Reserve Level 2 (LOR2) in the QLD region - 22/01/2025
An Actual LOR2 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the QLD region from 1830 hrs.
The Actual LOR2 condition is forecast to exist until 1900 hrs.
The forecast capacity reserve requirement is 515 MW.
The minimum capacity reserve available is 395 MW.
AEMO is seeking an immediate market response.
An insufficient market response may require AEMO to implement an AEMO intervention event.
Manager NEM Real Time Operations
123178RESERVE NOTICE13/01/2025 06:15:43 PM
Cancellation of Actual (LOR2) condition in the NSW region - 13/01/2025
AEMO ELECTRICITY MARKET NOTICE
Cancellation of Actual (LOR2) condition in the NSW region - 13/01/2025
The Actual LOR2 Condition in the NSW Region advised in AEMO Electricity Market Notice No.123176 is cancelled at 1815 hrs 13/01/2025.
Manager NEM Real Time Operations
Cancellation of Actual (LOR2) condition in the NSW region - 13/01/2025
The Actual LOR2 Condition in the NSW Region advised in AEMO Electricity Market Notice No.123176 is cancelled at 1815 hrs 13/01/2025.
Manager NEM Real Time Operations
123176RESERVE NOTICE13/01/2025 05:49:35 PM
Actual Lack Of Reserve Level 2 (LOR2) in the NSW region - 13/01/2025
AEMO ELECTRICITY MARKET NOTICE
Actual Lack Of Reserve Level 2 (LOR2) in the NSW region - 13/01/2025
An Actual LOR2 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the NSW region from 1730 hrs.
The Actual LOR2 condition is forecast to exist until 1800 hrs
The capacity reserve required is 714 MW
The minimum reserve available is 560 MW
AEMO is seeking an immediate market response.
An insufficient market response may require AEMO to implement a AEMO intervention event.
Manager NEM Real Time Operations
Actual Lack Of Reserve Level 2 (LOR2) in the NSW region - 13/01/2025
An Actual LOR2 condition has been declared under clause 4.8.4(b) of the National Electricity Rules for the NSW region from 1730 hrs.
The Actual LOR2 condition is forecast to exist until 1800 hrs
The capacity reserve required is 714 MW
The minimum reserve available is 560 MW
AEMO is seeking an immediate market response.
An insufficient market response may require AEMO to implement a AEMO intervention event.
Manager NEM Real Time Operations