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101368CONSTRAINTS26/08/2022 10:59:09 AM
New Victorian system normal voltage stability limit
AEMO ELECTRICITY MARKET NOTICE
AEMO has identified a new voltage collapse issue in south-west Victoria. The voltage collapse occurs in the south-west region for loss of the Haunted Gully to Moorabool 500 kV line with simultaneous trip of both APD potlines as per Market Notice 91405.
The limit will manage flow towards Moorabool on the cut-set of Haunted Gully to Moorabool and Mortlake to Moorabool 500 kV lines.
The new constraint equation includes generators in south-west Victoria on the left-hand side as well as Heywood interconnector. Full details on the limits advice are to be published on 30th August 2022 on the AEMO website: https://aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
The following constraint equation will be implemented and added to constraint set V-NIL at 1000 hrs on Tuesday 30th August 2022:
V^^V_NIL_SWVIC
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 identified a new voltage collapse issue in south-west Victoria. The voltage collapse occurs in the south-west region for loss of the Haunted Gully to Moorabool 500 kV line with simultaneous trip of both APD potlines as per Market Notice 91405.
The limit will manage flow towards Moorabool on the cut-set of Haunted Gully to Moorabool and Mortlake to Moorabool 500 kV lines.
The new constraint equation includes generators in south-west Victoria on the left-hand side as well as Heywood interconnector. Full details on the limits advice are to be published on 30th August 2022 on the AEMO website: https://aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
The following constraint equation will be implemented and added to constraint set V-NIL at 1000 hrs on Tuesday 30th August 2022:
V^^V_NIL_SWVIC
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
101028CONSTRAINTS16/08/2022 11:57:21 AM
Update to Vic to NSW voltage collapse limit
AEMO ELECTRICITY MARKET NOTICE
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
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
101018CONSTRAINTS16/08/2022 09:23:02 AM
Update to System strength requirements in North Queensland
AEMO ELECTRICITY MARKET NOTICE
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
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
99413CONSTRAINTS24/06/2022 01:18:44 PM
Update to SA to Victoria limits for Para SVC outage
AEMO ELECTRICITY MARKET NOTICE
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
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
99049ADMINISTERED PRICE CAP23/06/2022 03:55:01 AM
[EventId:184] AP ENDED for ENERGY in VIC1 at 23 June 2022 03:55
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 22 June 2022
ADMINISTERED PRICE PERIOD ENDS in VIC1 region.
In accordance with Clause 3.14.2(b) of the National Electricity Rules, AEMO is notifying market participants that the administered price period declared for the VIC1 region in market notice 98784 will end at 0400 hrs on 23 June 2022.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 22 June 2022
ADMINISTERED PRICE PERIOD ENDS in VIC1 region.
In accordance with Clause 3.14.2(b) of the National Electricity Rules, AEMO is notifying market participants that the administered price period declared for the VIC1 region in market notice 98784 will end at 0400 hrs on 23 June 2022.
This is an AEMO autogenerated Market Notice.
99048ADMINISTERED PRICE CAP23/06/2022 03:55:01 AM
[EventId:183] AP ENDED for ENERGY in QLD1 at 23 June 2022 03:55
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 22 June 2022
ADMINISTERED PRICE PERIOD ENDS in QLD1 region.
In accordance with Clause 3.14.2(b) of the National Electricity Rules, AEMO is notifying market participants that the administered price period declared for the QLD1 region in market notice 98783 will end at 0400 hrs on 23 June 2022.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 22 June 2022
ADMINISTERED PRICE PERIOD ENDS in QLD1 region.
In accordance with Clause 3.14.2(b) of the National Electricity Rules, AEMO is notifying market participants that the administered price period declared for the QLD1 region in market notice 98783 will end at 0400 hrs on 23 June 2022.
This is an AEMO autogenerated Market Notice.
99047ADMINISTERED PRICE CAP23/06/2022 03:55:01 AM
[EventId:182] AP ENDED for ENERGY in NSW1 at 23 June 2022 03:55
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 22 June 2022
ADMINISTERED PRICE PERIOD ENDS in NSW1 region.
In accordance with Clause 3.14.2(b) of the National Electricity Rules, AEMO is notifying market participants that the administered price period declared for the NSW1 region in market notice 98782 will end at 0400 hrs on 23 June 2022.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 22 June 2022
ADMINISTERED PRICE PERIOD ENDS in NSW1 region.
In accordance with Clause 3.14.2(b) of the National Electricity Rules, AEMO is notifying market participants that the administered price period declared for the NSW1 region in market notice 98782 will end at 0400 hrs on 23 June 2022.
This is an AEMO autogenerated Market Notice.
98784ADMINISTERED PRICE CAP22/06/2022 03:55:11 AM
[EventId:184] AP STARTED for ENERGY in VIC1 at 22 June 2022 03:55
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 22 June 2022
ADMINISTERED PRICE PERIOD DECLARED in VIC1 region.
AEMO has determined that the rolling sum of the uncapped spot prices for the VIC1 region over the previous 2016 trading intervals has exceeded the cumulative price threshold (CPT) of $1,359,100.00.
In accordance with Clause 3.14.2(b) of the National Electricity Rules, AEMO has determined that an administered price period will commence at the trading interval starting 0405 hrs on 22 June 2022 and will continue through to the end of that trading day.
An administered price cap (APC) of 300 $/MWh will apply to all trading intervals during this administered price period. This APC will apply to spot prices and to all market ancillary service prices in the VIC1 region.
An administered floor price (AFP) of -300 $/MWh will apply to spot prices.
AEMO will continue to monitor the rolling sum of the uncapped spot prices and issue further Market Notices as required.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 22 June 2022
ADMINISTERED PRICE PERIOD DECLARED in VIC1 region.
AEMO has determined that the rolling sum of the uncapped spot prices for the VIC1 region over the previous 2016 trading intervals has exceeded the cumulative price threshold (CPT) of $1,359,100.00.
In accordance with Clause 3.14.2(b) of the National Electricity Rules, AEMO has determined that an administered price period will commence at the trading interval starting 0405 hrs on 22 June 2022 and will continue through to the end of that trading day.
An administered price cap (APC) of 300 $/MWh will apply to all trading intervals during this administered price period. This APC will apply to spot prices and to all market ancillary service prices in the VIC1 region.
An administered floor price (AFP) of -300 $/MWh will apply to spot prices.
AEMO will continue to monitor the rolling sum of the uncapped spot prices and issue further Market Notices as required.
This is an AEMO autogenerated Market Notice.
98783ADMINISTERED PRICE CAP22/06/2022 03:55:10 AM
[EventId:183] AP STARTED for ENERGY in QLD1 at 22 June 2022 03:55
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 22 June 2022
ADMINISTERED PRICE PERIOD DECLARED in QLD1 region.
AEMO has determined that the rolling sum of the uncapped spot prices for the QLD1 region over the previous 2016 trading intervals has exceeded the cumulative price threshold (CPT) of $1,359,100.00.
In accordance with Clause 3.14.2(b) of the National Electricity Rules, AEMO has determined that an administered price period will commence at the trading interval starting 0405 hrs on 22 June 2022 and will continue through to the end of that trading day.
An administered price cap (APC) of 300 $/MWh will apply to all trading intervals during this administered price period. This APC will apply to spot prices and to all market ancillary service prices in the QLD1 region.
An administered floor price (AFP) of -300 $/MWh will apply to spot prices.
AEMO will continue to monitor the rolling sum of the uncapped spot prices and issue further Market Notices as required.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 22 June 2022
ADMINISTERED PRICE PERIOD DECLARED in QLD1 region.
AEMO has determined that the rolling sum of the uncapped spot prices for the QLD1 region over the previous 2016 trading intervals has exceeded the cumulative price threshold (CPT) of $1,359,100.00.
In accordance with Clause 3.14.2(b) of the National Electricity Rules, AEMO has determined that an administered price period will commence at the trading interval starting 0405 hrs on 22 June 2022 and will continue through to the end of that trading day.
An administered price cap (APC) of 300 $/MWh will apply to all trading intervals during this administered price period. This APC will apply to spot prices and to all market ancillary service prices in the QLD1 region.
An administered floor price (AFP) of -300 $/MWh will apply to spot prices.
AEMO will continue to monitor the rolling sum of the uncapped spot prices and issue further Market Notices as required.
This is an AEMO autogenerated Market Notice.