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97704MARKET SUSPENSION15/06/2022 02:01:35 PM
Declaration of electricity market suspension
AEMO ELECTRICITY MARKET NOTICE
Declaration of electricity market suspension
AEMO declares the spot market suspended in New South Wales, Queensland, South Australia, Tasmania and Victoria with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 1405 hrs on 15 June 2022 until further notice.
Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually.
AEMO has determined that it is necessary to suspend the spot market in all regions under NER clause 3.14.3(s)3) because it has become impossible to operate the spot market in accordance with the provisions of the Rules.
Manager NEM Real Time Operation
Declaration of electricity market suspension
AEMO declares the spot market suspended in New South Wales, Queensland, South Australia, Tasmania and Victoria with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 1405 hrs on 15 June 2022 until further notice.
Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually.
AEMO has determined that it is necessary to suspend the spot market in all regions under NER clause 3.14.3(s)3) because it has become impossible to operate the spot market in accordance with the provisions of the Rules.
Manager NEM Real Time Operation
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
94993MARKET SUSPENSION01/03/2022 06:43:18 PM
Declaration of electricity market resumption
AEMO ELECTRICITY MARKET NOTICE
Declaration of electricity market resumption
Refer initial AEMO Electricity Market Notice 94979
AEMO declares that the suspension of the spot market in Tasmania will end at 1915 hrs on 1 March 2022.
Relevant Market Notices issued under this suspension:
94979
Manager NEM Real Time Operations
Declaration of electricity market resumption
Refer initial AEMO Electricity Market Notice 94979
AEMO declares that the suspension of the spot market in Tasmania will end at 1915 hrs on 1 March 2022.
Relevant Market Notices issued under this suspension:
94979
Manager NEM Real Time Operations
94979MARKET SUSPENSION01/03/2022 12:39:12 PM
Declaration of electricity market suspension
AEMO ELECTRICITY MARKET NOTICE
Declaration of electricity market suspension
AEMO declares the spot market suspended in Tasmania with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 1240 hrs on 1 March 2022 until further notice.
Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually.
AEMO has determined that it has become impossible to operate the spot market in accordance with the provisions of the Rules due to Failure of SCADA systems.
Manager NEM Real Time Operation
Declaration of electricity market suspension
AEMO declares the spot market suspended in Tasmania with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 1240 hrs on 1 March 2022 until further notice.
Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually.
AEMO has determined that it has become impossible to operate the spot market in accordance with the provisions of the Rules due to Failure of SCADA systems.
Manager NEM Real Time Operation
94694MARKET SUSPENSION18/02/2022 03:38:41 PM
Declaration of electricity market resumption
AEMO ELECTRICITY MARKET NOTICE
Declaration of electricity market resumption
Refer initial AEMO Electricity Market Notice 94690
AEMO declares that the suspension of the spot market in South Australia will end at 1610 hrs on 18 February 2022.
Relevant Market Notices issued under this suspension:
94690
Manager NEM Real Time Operations
Declaration of electricity market resumption
Refer initial AEMO Electricity Market Notice 94690
AEMO declares that the suspension of the spot market in South Australia will end at 1610 hrs on 18 February 2022.
Relevant Market Notices issued under this suspension:
94690
Manager NEM Real Time Operations
94690MARKET SUSPENSION18/02/2022 02:21:34 PM
Declaration of electricity market suspension
AEMO ELECTRICITY MARKET NOTICE
Declaration of electricity market suspension
AEMO declares the spot market suspended in South Australia with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 1425 hrs on 18 February 2022 until further notice.
Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually.
AEMO ELECTRICITY MARKET NOTICE Declaration of electricity market suspension AEMO declares the spot market suspended in South Australia with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 1420 hrs on 18 February 2022 until further notice. Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually. Manager NEM Real Time Operation
Manager NEM Real Time Operation
Declaration of electricity market suspension
AEMO declares the spot market suspended in South Australia with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 1425 hrs on 18 February 2022 until further notice.
Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually.
AEMO ELECTRICITY MARKET NOTICE Declaration of electricity market suspension AEMO declares the spot market suspended in South Australia with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 1420 hrs on 18 February 2022 until further notice. Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually. Manager NEM Real Time Operation
Manager NEM Real Time Operation
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
92840CONSTRAINTS01/12/2021 11:21:45 AM
Update to system normal constraint equation in NSW for voltage collapse at Darlington Point
AEMO ELECTRICITY MARKET NOTICE
Refer to Market Notice 90954
TransGrid has advised AEMO of a revision to the Darlington Point to Wagga (63) 330 kV line voltage collapse limit due to changes in a control scheme in the area. With this change the current voltage collapse limit will be replaced by a transient voltage limit - and allow for increased flows on 63 line.
AEMO has reviewed the limit advice and will make the following constraint equation changes at 1300 hrs Wednesday 1st December 2021:
Add - N::N_NIL_63
Remove - N^^N_NIL_2
The limit is for pre-contingent flow on 63 line. The constraint equation includes generators in south-west NSW and north-west Victoria on the left-hand side as well as Murraylink.
Ben Blake
AEMO Operations
Refer to Market Notice 90954
TransGrid has advised AEMO of a revision to the Darlington Point to Wagga (63) 330 kV line voltage collapse limit due to changes in a control scheme in the area. With this change the current voltage collapse limit will be replaced by a transient voltage limit - and allow for increased flows on 63 line.
AEMO has reviewed the limit advice and will make the following constraint equation changes at 1300 hrs Wednesday 1st December 2021:
Add - N::N_NIL_63
Remove - N^^N_NIL_2
The limit is for pre-contingent flow on 63 line. The constraint equation includes generators in south-west NSW and north-west Victoria on the left-hand side as well as Murraylink.
Ben Blake
AEMO Operations