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95690CONSTRAINTS01/04/2022 09:00:20 AM
Update to Vic to NSW transient stability limit
AEMO ELECTRICITY MARKET NOTICE
AEMO has completed a comprehensive review of the system normal transient stability limit for loss of a Hazelwood to South Morang 500 kV line for flows from Victoria to New South Wales. The revised limit takes into account a larger range of inertias, demands, interconnector flows and many different plants online. The revised limit is generally lower than the existing limit due to lower demands and inertias in the Victorian system since the last review back in 2016. However, it is expected the revised limit will normally be under-cut by the Victorian export voltage collapse limit for loss of all APD potlines.
The revised constraint equation includes generators in southern NSW and generation in Victoria on the left-hand side as well as interconnectors. Full details on the limits advice are to be published on 04/04/2022 on the AEMO website: https://aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
This revised limit will be implemented to the Victorian system normal constraint set V-NIL at 1000 hrs Tuesday 5th April 2022, with the following changes:
Constraint equations to remove:
- V::N_NIL_V
- V::N_NIL_S
- V::N_NIL_Q1
- V::N_NIL_Q2
Constraint equations to add:
- V::N_NIL_V1
- V::N_NIL_V2
- V::N_NIL_O1
- V::N_NIL_O2
These constraint equation changes have already been applied in AEMO's PreProduction systems.
For further details on the constraint equations please contact terry.liu@aemo.com.au
Terry Liu
AEMO Operations
AEMO has completed a comprehensive review of the system normal transient stability limit for loss of a Hazelwood to South Morang 500 kV line for flows from Victoria to New South Wales. The revised limit takes into account a larger range of inertias, demands, interconnector flows and many different plants online. The revised limit is generally lower than the existing limit due to lower demands and inertias in the Victorian system since the last review back in 2016. However, it is expected the revised limit will normally be under-cut by the Victorian export voltage collapse limit for loss of all APD potlines.
The revised constraint equation includes generators in southern NSW and generation in Victoria on the left-hand side as well as interconnectors. Full details on the limits advice are to be published on 04/04/2022 on the AEMO website: https://aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
This revised limit will be implemented to the Victorian system normal constraint set V-NIL at 1000 hrs Tuesday 5th April 2022, with the following changes:
Constraint equations to remove:
- V::N_NIL_V
- V::N_NIL_S
- V::N_NIL_Q1
- V::N_NIL_Q2
Constraint equations to add:
- V::N_NIL_V1
- V::N_NIL_V2
- V::N_NIL_O1
- V::N_NIL_O2
These constraint equation changes have already been applied in AEMO's PreProduction systems.
For further details on the constraint equations please contact terry.liu@aemo.com.au
Terry Liu
AEMO Operations
95189PRICE ADJUSTMENT09/03/2022 03:22:58 AM
[EventId:202203090320_confirmed] Prices for interval 09-Mar-2022 03:20 are now confirmed
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 0322 hrs on 9 March 2022
PRICES ARE NOW CONFIRMED for trading interval 09-Mar-2022 03:20.
In accordance with Market Notice 95187 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs applied. Prices have been carried forward from the previous dispatch interval
Changed Prices ($/MWh)
TYPE
Region Original Adjusted
Price Price
ENERGY
NSW1 $65.93 $89.97
QLD1 $68.10 $15,100.00
SA1 -$21.03 -$29.46
TAS1 $86.46 $86.44
VIC1 -$21.00 -$29.89
LOWER5MIN
NSW1 $0.07 $0.00
QLD1 $0.07 $0.00
SA1 $0.07 $0.00
VIC1 $0.07 $0.00
RAISE5MIN
NSW1 $0.72 $0.75
QLD1 $0.72 $0.75
SA1 $0.72 $0.75
VIC1 $0.72 $0.75
RAISE60SEC
NSW1 $4.95 $4.97
QLD1 $4.95 $4.97
SA1 $4.95 $4.97
VIC1 $4.95 $4.97
RAISE6SEC
NSW1 $4.95 $4.97
QLD1 $4.95 $4.97
SA1 $4.95 $4.97
VIC1 $4.95 $4.97
RAISEREG
NSW1 $15.00 $19.50
QLD1 $15.00 $19.50
SA1 $15.00 $19.50
VIC1 $15.00 $19.50
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 0322 hrs on 9 March 2022
PRICES ARE NOW CONFIRMED for trading interval 09-Mar-2022 03:20.
In accordance with Market Notice 95187 AEMO has reviewed this trading interval and determined that:
- Manifestly Incorrect Inputs applied. Prices have been carried forward from the previous dispatch interval
Changed Prices ($/MWh)
TYPE
Region Original Adjusted
Price Price
ENERGY
NSW1 $65.93 $89.97
QLD1 $68.10 $15,100.00
SA1 -$21.03 -$29.46
TAS1 $86.46 $86.44
VIC1 -$21.00 -$29.89
LOWER5MIN
NSW1 $0.07 $0.00
QLD1 $0.07 $0.00
SA1 $0.07 $0.00
VIC1 $0.07 $0.00
RAISE5MIN
NSW1 $0.72 $0.75
QLD1 $0.72 $0.75
SA1 $0.72 $0.75
VIC1 $0.72 $0.75
RAISE60SEC
NSW1 $4.95 $4.97
QLD1 $4.95 $4.97
SA1 $4.95 $4.97
VIC1 $4.95 $4.97
RAISE6SEC
NSW1 $4.95 $4.97
QLD1 $4.95 $4.97
SA1 $4.95 $4.97
VIC1 $4.95 $4.97
RAISEREG
NSW1 $15.00 $19.50
QLD1 $15.00 $19.50
SA1 $15.00 $19.50
VIC1 $15.00 $19.50
This is an AEMO autogenerated Market Notice.
94981PRICE ADJUSTMENT01/03/2022 01:57:33 PM
[EventId:202203011240_confirmed] Prices for interval 01-Mar-2022 12:40 are now confirmed
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1357 hrs on 1 March 2022
PRICES ARE NOW CONFIRMED for trading interval 01-Mar-2022 12:40.
In accordance with Market Notice AEMO has reviewed this trading interval and determined that:
Changed Prices ($/MWh)
TYPE
Region Original Adjusted
Price Price
ENERGY
TAS1 $55.12 $57.78
LOWER5MIN
TAS1 $0.44 $0.34
LOWER60SEC
TAS1 $0.90 $2.55
LOWER6SEC
TAS1 $0.60 $3.28
LOWERREG
TAS1 $18.98 $13.61
RAISE5MIN
TAS1 $0.90 $1.21
RAISE60SEC
TAS1 $1.73 $3.19
RAISE6SEC
TAS1 $4.98 $13.57
RAISEREG
TAS1 $11.86 $15.23
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1357 hrs on 1 March 2022
PRICES ARE NOW CONFIRMED for trading interval 01-Mar-2022 12:40.
In accordance with Market Notice
Changed Prices ($/MWh)
TYPE
Region Original Adjusted
Price Price
ENERGY
TAS1 $55.12 $57.78
LOWER5MIN
TAS1 $0.44 $0.34
LOWER60SEC
TAS1 $0.90 $2.55
LOWER6SEC
TAS1 $0.60 $3.28
LOWERREG
TAS1 $18.98 $13.61
RAISE5MIN
TAS1 $0.90 $1.21
RAISE60SEC
TAS1 $1.73 $3.19
RAISE6SEC
TAS1 $4.98 $13.57
RAISEREG
TAS1 $11.86 $15.23
This is an AEMO autogenerated Market Notice.
94707PRICE ADJUSTMENT19/02/2022 10:39:23 AM
[EventId:202202181425_confirmed] Prices for interval 18-Feb-2022 14:25 are now confirmed
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1039 hrs on 19 February 2022
PRICES ARE NOW CONFIRMED for trading interval 18-Feb-2022 14:25.
In accordance with Market Notice AEMO has reviewed this trading interval and determined that:
Changed Prices ($/MWh)
TYPE
Region Original Adjusted
Price Price
ENERGY
SA1 -$57.00 $33.43
LOWER5MIN
SA1 $0.42 $0.54
LOWER60SEC
SA1 $6.73 $2.18
LOWER6SEC
SA1 $1.23 $0.83
LOWERREG
SA1 $10.49 $5.82
RAISE5MIN
SA1 $0.50 $0.56
RAISE60SEC
SA1 $0.96 $1.53
RAISE6SEC
SA1 $1.43 $1.06
RAISEREG
SA1 $10.00 $17.89
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1039 hrs on 19 February 2022
PRICES ARE NOW CONFIRMED for trading interval 18-Feb-2022 14:25.
In accordance with Market Notice
Changed Prices ($/MWh)
TYPE
Region Original Adjusted
Price Price
ENERGY
SA1 -$57.00 $33.43
LOWER5MIN
SA1 $0.42 $0.54
LOWER60SEC
SA1 $6.73 $2.18
LOWER6SEC
SA1 $1.23 $0.83
LOWERREG
SA1 $10.49 $5.82
RAISE5MIN
SA1 $0.50 $0.56
RAISE60SEC
SA1 $0.96 $1.53
RAISE6SEC
SA1 $1.43 $1.06
RAISEREG
SA1 $10.00 $17.89
This is an AEMO autogenerated Market Notice.
94062PROTECTED EVENT26/01/2022 11:00:25 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: 26/01/2022 2300 hrs
Constraint set(s) revoked: I-VS_250
Refer AEMO Electricity Market Notice 94056
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: 26/01/2022 2300 hrs
Constraint set(s) revoked: I-VS_250
Refer AEMO Electricity Market Notice 94056
Manager NEM Real Time Operations
94056PROTECTED EVENT26/01/2022 08:33:26 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: 26/01/2022 2035 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: 26/01/2022 2035 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
93862CONSTRAINTS14/01/2022 04:02:41 PM
Updated generator combinations for SA
AEMO MARKET NOTICE
Refer to market notice 92769
AEMO has published new generator combinations for South Australia:
- 1 for four synchronous condenser operation
- 9 for two synchronous condenser operation
Details on the new combinations and conditions for their use is in the updated limits advice (which was published earlier 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 92769
AEMO has published new generator combinations for South Australia:
- 1 for four synchronous condenser operation
- 9 for two synchronous condenser operation
Details on the new combinations and conditions for their use is in the updated limits advice (which was published earlier 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
93841CONSTRAINTS13/01/2022 01:22:58 PM
Update to System strength requirements in North Queensland
AEMO ELECTRICITY MARKET NOTICE
Refer to market notice 89836
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland.
Due to commissioning of Haughton syncon, the system normal equations have been revised.
A revision to the constraint equations will be implemented at 0900hrs on Friday 14th January 2022.
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.
The constraint equation 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
For further details please contact James Lindley at james.lindley@aemo.com.au or Simon Taylor at businessdevelopment@powerlink.com.au
AEMO Operations
Refer to market notice 89836
AEMO and Powerlink are continuing to investigate system strength requirements in North Queensland.
Due to commissioning of Haughton syncon, the system normal equations have been revised.
A revision to the constraint equations will be implemented at 0900hrs on Friday 14th January 2022.
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.
The constraint equation 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
For further details please contact James Lindley at james.lindley@aemo.com.au or Simon Taylor at businessdevelopment@powerlink.com.au
AEMO Operations
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