Filter by category
Filter by Date
Update to Vic to NSW voltage collapse limit
Refer to Market Notice 82819
AEMO has completed a comprehensive review of the system normal voltage stability limit for loss of all APD potlines for flows from Victoria to New South Wales. The revised limit is the result of latest network configuration, comprehensive generation/load patterns, and recent commissioned generators in Victoria and southern NSW which could potentially mean higher transfers into NSW under some generation/load scenarios.
The revised constraint equation includes generators in southern NSW, north-west Victoria and hydro generation at Mt. Beauty on the left-hand side as well as VIC1-NSW1 and Murraylink. Full details on the limits advice are to be published on 18/08/2022 on the AEMO website: https://aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
The constraint is most likely to bind when there is low Vic demands and high transfers to NSW. When it binds it will restrict Vic to NSW transfers and southern NSW units.
This revised limit will be implemented to the following constraint equation at 1000 hrs Thursday 18th August 2022.
V^^N_NIL_1
For further details on this constraint equation please contact terry.liu@aemo.com.au
Terry Liu
AEMO Operations
Update to System strength requirements in North Queensland
Refer to market notice 93841
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland.
Due to reduced numbers of Gladstone units online, the system normal equations have been revised to include below combination.
-If Stanwell >=2, Stanwell + Calllide >=3, Gladstone >= 1, Stanwell + Callide + Gladstone >= 7, Kareeya >=2, Haughton Syncon status = ON, North Queensland load >=250 MW,
Ross+FNQ load >=100 MW, limit Mt Emerald Windfarm to 80% and no limit to other solar farms.
A revision to the constraint equations will be implemented at 1100 hrs on Tuesday 16th August 2022.
The new combinations will be published in a limits advice document on AEMO's website on Wednesday 17th August 2022.
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_CLRSF
Q_NIL_STRGTH_COLSF
Q_NIL_STRGTH_DAYSF
Q_NIL_STRGTH_HAMSF
Q_NIL_STRGTH_HAUSF
Q_NIL_STRGTH_HAYSF
Q_NIL_STRGTH_KEP
Q_NIL_STRGTH_KIDSF
Q_NIL_STRGTH_MEWF
Q_NIL_STRGTH_RUGSF
Q_NIL_STRGTH_RRSF
Q_NIL_STRGTH_SMSF
Q_NIL_STRGTH_WHTSF
AEMO Operations
STPASA - Cancellation of the Forecast Lack Of Reserve Level 3 (LOR3) in the SA Region on 15/08/2022
The Forecast LOR3 condition in the SA region on 15/08/2022 advised in AEMO Electricity Market Notice No. 100822 is cancelled at 1000 hrs 10/08/2022.
AEMO Operations
STPASA - Forecast Lack Of Reserve Level 3 (LOR3) in the SA Region on 15/08/2022
AEMO declares a Forecast LOR3 condition under clause 4.8.4(b) of the National Electricity Rules for the SA region for the following period:
From 1800 hrs 15/08/2022 to 1830 hrs 15/08/2022.
The maximum load (other than interruptible loads) forecast to be interrupted is 5 MW at 1800 hrs.
AEMO is seeking a market response.
AEMO has not yet estimated the latest time it would need to intervene through an AEMO intervention event.
AEMO Operations
STPASA - Cancellation of the Forecast Lack Of Reserve Level 3 (LOR3) in the SA Region on 29/06/2022
The Forecast LOR3 condition in the SA region on 29/06/2022 advised in AEMO Electricity Market Notice No. 99700 is cancelled at 1400 hrs 27/06/2022.
AEMO Operations
STPASA - Forecast Lack Of Reserve Level 3 (LOR3) in the SA Region on 29/06/2022
AEMO declares a Forecast LOR3 condition under clause 4.8.4(b) of the National Electricity Rules for the SA region for the following period:
From 1800 hrs to 1830 hrs 29/06/2022.
The maximum load (other than interruptible loads) forecast to be interrupted is 34 MW at 1800 hrs.
AEMO is seeking a market response.
AEMO has not yet estimated the latest time it would need to intervene through an AEMO intervention event.
AEMO Operations
Update to SA to Victoria limits for Para SVC outage
AEMO has been working with ElectraNet on a review of the oscillatory stability limits for the Para SVC outage for flows from South Australia to Victoria.
From that review the these limits from SA to Vic have been increased by 50 MW. The limit on Heywood has changed to 470 MW and for Heywood + Murraylink to 620 MW when the oscillatory stability monitoring is in service. If oscillatory monitoring is not in service the 50 MW increase will not apply.
The revised constraints were implemented in the constraint set S-PA_VC1 at 1300 hrs Friday 24th June 2022:
S:VS_PASVC_570OSC_AT
S:VS_PA_SVC_620
S:V_PASVC_420OSC_AT
S:V_PA_SVC_470
SV_470_DYN
AEMO and ElectraNet are continuing their studies on the limits for the Para SVC outage to determine if further increases can be made.
For further details on this this change please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
STPASA - Cancellation of the Forecast Lack Of Reserve Level 3 (LOR3) in the SA Region on 30/06/2022
The Forecast LOR3 condition in the SA region on 30/06/2022 advised in AEMO Electricity Market Notice No. 99072 is cancelled at 0720 hrs 24/06/2022.
Manager NEM Real Time Operations
STPASA - Forecast Lack Of Reserve Level 3 (LOR3) in the SA Region on 30/06/2022
AEMO declares a Forecast LOR3 condition under clause 4.8.4(b) of the National Electricity Rules for the SA region for the following period:
From 0730 hrs 30/06/2022 to 0930 hrs 30/06/2022.
The maximum load (other than interruptible loads) forecast to be interrupted is 151 MW at 0800 hrs.
AEMO is seeking a market response.
AEMO has not yet estimated the latest time it would need to intervene through an AEMO intervention event.
AEMO Operations