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73858GENERAL NOTICE06/02/2020 09:57:19 AM
New synchronous generator combinations for the SA + APD + Mortlake Island for system strength and frequency control
AEMO ELECTRICITY MARKET NOTICE
Refer to market notice 73838
AEMO is continuing to investigate combinations required for the extended operation of South Australia, Mortlake and APD connected as an island. Six new minimum combinations of synchronous generation in South Australia have been added, these are:
4 - 3 x Torrens Island A units + 2 x Torrens Island B units + Osborne GT & ST
5 - 3 x Torrens Island A units + 2 x Torrens Island B units + 1 x Pelican Point GT/ST units
6 - 2 x Torrens Island A units + 3 x Torrens Island B units + 1 x Pelican Point GT/ST units
7 - 3 x Torrens Island A units + 2 x Torrens Island B units + Quarantine 5
8 - 2 x Torrens Island A units + 3 x Torrens Island B units + Quarantine 5
The limits advice on the AEMO website will be updated shortly:
https://www.aemo.com.au/-/media/files/electricity/nem/security_and_reliability/congestion-information/transfer-limit-advice-system-strength.pdf?la=en
AEMO is continuing to investigate other synchronous generator combinations ? these will be advised by future market notices.
Ben Blake
AEMO Operations
Refer to market notice 73838
AEMO is continuing to investigate combinations required for the extended operation of South Australia, Mortlake and APD connected as an island. Six new minimum combinations of synchronous generation in South Australia have been added, these are:
4 - 3 x Torrens Island A units + 2 x Torrens Island B units + Osborne GT & ST
5 - 3 x Torrens Island A units + 2 x Torrens Island B units + 1 x Pelican Point GT/ST units
6 - 2 x Torrens Island A units + 3 x Torrens Island B units + 1 x Pelican Point GT/ST units
7 - 3 x Torrens Island A units + 2 x Torrens Island B units + Quarantine 5
8 - 2 x Torrens Island A units + 3 x Torrens Island B units + Quarantine 5
The limits advice on the AEMO website will be updated shortly:
https://www.aemo.com.au/-/media/files/electricity/nem/security_and_reliability/congestion-information/transfer-limit-advice-system-strength.pdf?la=en
AEMO is continuing to investigate other synchronous generator combinations ? these will be advised by future market notices.
Ben Blake
AEMO Operations
73857GENERAL NOTICE06/02/2020 09:47:34 AM
Operation of SA + APD + Mortlake Island during low demand periods
AEMO ELECTRICITY MARKET NOTICE
AEMO has determined that during times of low demand in South Australia + APD + Mortlake island a number of generators and Murraylink need to be constrained. This is so there is enough inertia, frequency responsive plant, and generation enabled in the over-frequency generation shedding scheme (OFGS) to ensure power system security is maintained following a credible contingency.
When the operational demand in South Australia falls below 800 MW the following generators will be ramped down and constrained to zero (see Constraint Set: SA-GEN_RAMP_ZERO)
Angaston
Barkers Inlet
Bungala 1 SF
Bungala 2 SF
Dry Creek
Hallett
Hornsdale 1 WF
Hornsdale 2 WF
Hornsdale 3 WF
Ladbroke Grove
Lincoln Gap WF
Lonsdale
Mintaro
Port Lincoln GT
Port Stanvac
QPS 1-4
Snuggery
Tailem Bend SF
Willogoleche WF
Murraylink will also be constrained to zero flows from Victoria to South Australia (unconstrained for SA to Vic flows).
The following non-scheduled generators will be directed to zero:
Cathedral Rocks WF
Mt Millar WF
Starfish Hill WF
Wattle Point WF
Ben Blake
AEMO Operations
AEMO has determined that during times of low demand in South Australia + APD + Mortlake island a number of generators and Murraylink need to be constrained. This is so there is enough inertia, frequency responsive plant, and generation enabled in the over-frequency generation shedding scheme (OFGS) to ensure power system security is maintained following a credible contingency.
When the operational demand in South Australia falls below 800 MW the following generators will be ramped down and constrained to zero (see Constraint Set: SA-GEN_RAMP_ZERO)
Angaston
Barkers Inlet
Bungala 1 SF
Bungala 2 SF
Dry Creek
Hallett
Hornsdale 1 WF
Hornsdale 2 WF
Hornsdale 3 WF
Ladbroke Grove
Lincoln Gap WF
Lonsdale
Mintaro
Port Lincoln GT
Port Stanvac
QPS 1-4
Snuggery
Tailem Bend SF
Willogoleche WF
Murraylink will also be constrained to zero flows from Victoria to South Australia (unconstrained for SA to Vic flows).
The following non-scheduled generators will be directed to zero:
Cathedral Rocks WF
Mt Millar WF
Starfish Hill WF
Wattle Point WF
Ben Blake
AEMO Operations
73856RECLASSIFY CONTINGENCY06/02/2020 09:29:00 AM
Reclassification of a Non-Credible Contingency Event: Eildon PS - Mt Beauty No.1 220 kV line and Eildon PS - Mt Beauty No.2 220 kV line in VIC1 due to Lightning.
AEMO ELECTRICITY MARKET NOTICE
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: VIC1
Lines: Eildon PS - Mt Beauty No.1 220 kV and Eildon PS - Mt Beauty No.2 220 kV
Duration: 06/02/2020 09:28 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.
Region: VIC1
Lines: Eildon PS - Mt Beauty No.1 220 kV and Eildon PS - Mt Beauty No.2 220 kV
Duration: 06/02/2020 09:28 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
73855ADMINISTERED PRICE CAP06/02/2020 03:55:33 AM
[EventId:135] AP STARTED for market ancillary services in SA at 06 February 2020 04:00
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 6 February 2020
ADMINISTERED PRICE PERIOD DECLARED in SA region.
AEMO has determined that the rolling sum of the uncapped market ancillary Lower 60 Sec, Lower 6 Sec, Raise 6 Sec services(s) prices for the SA region over the previous 2016 dispatch intervals has exceeded 6 times the cumulative price threshold (CPT) of $221,100.00.
In accordance with Clause 3.14 of the National Electricity Rules, AEMO has determined that an administered price period will commence at the dispatch interval starting 0400 hrs on 6 Feb 2020 and will continue through to the end of that trading day.
An administered price cap (APC) of 300 $/MWh will apply to all dispatch intervals during this administered price period. This APC will apply to all market ancillary service prices in the SA region.
An administered floor price (AFP) of 0 $/MWh AFP will apply to all market ancillary service prices.
AEMO will continue to monitor the rolling sum of the uncapped market ancillary service 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 6 February 2020
ADMINISTERED PRICE PERIOD DECLARED in SA region.
AEMO has determined that the rolling sum of the uncapped market ancillary Lower 60 Sec, Lower 6 Sec, Raise 6 Sec services(s) prices for the SA region over the previous 2016 dispatch intervals has exceeded 6 times the cumulative price threshold (CPT) of $221,100.00.
In accordance with Clause 3.14 of the National Electricity Rules, AEMO has determined that an administered price period will commence at the dispatch interval starting 0400 hrs on 6 Feb 2020 and will continue through to the end of that trading day.
An administered price cap (APC) of 300 $/MWh will apply to all dispatch intervals during this administered price period. This APC will apply to all market ancillary service prices in the SA region.
An administered floor price (AFP) of 0 $/MWh AFP will apply to all market ancillary service prices.
AEMO will continue to monitor the rolling sum of the uncapped market ancillary service prices and issue further market notices as required.
This is an AEMO autogenerated Market Notice.
73854ADMINISTERED PRICE CAP06/02/2020 03:55:08 AM
[EventId:134] AP ENDED for market ancillary services in SA at 06 February 2020 04:00
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 6 February 2020
ADMINISTERED PRICE PERIOD ENDS in SA region.
In accordance with Clause 3.14.2(b) of the National Electricity Rules, AEMO is notifying market particpants that the administered price period declared for the SA region in market notice 73832 will end at 0400 hrs on 6 February 2020.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 0355 hrs on 6 February 2020
ADMINISTERED PRICE PERIOD ENDS in SA region.
In accordance with Clause 3.14.2(b) of the National Electricity Rules, AEMO is notifying market particpants that the administered price period declared for the SA region in market notice 73832 will end at 0400 hrs on 6 February 2020.
This is an AEMO autogenerated Market Notice.
73850SETTLEMENTS RESIDUE05/02/2020 04:15:11 PM
[EventId:202002051615_NRM_SA1_VIC1_stopped] NEGRES CONSTRAINT NRM_SA1_VIC1 ceased operating from 05 February 2020 16:15
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1615 hrs on 5 February 2020
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - SA to VIC - 5 February 2020.
Refer to market notice: 73844
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the SA to VIC directional interconnector.
The negative residue constraint NRM_SA1_VIC1 ceased operating at 1615 hrs on 5 February 2020.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1615 hrs on 5 February 2020
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - SA to VIC - 5 February 2020.
Refer to market notice: 73844
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the SA to VIC directional interconnector.
The negative residue constraint NRM_SA1_VIC1 ceased operating at 1615 hrs on 5 February 2020.
This is an AEMO autogenerated Market Notice.
73847RESERVE NOTICE05/02/2020 03:03:51 PM
STPASA - Cancellation of the Forecast Lack Of Reserve Level 1 (LOR1) in the South Australia on 10/02/2020
AEMO ELECTRICITY MARKET NOTICE
The Forecast LOR1 condition in the South Australia region advised in AEMO Electricity Market Notice No. 73793 is cancelled at 1400 hrs 05/02/2020.
No LOR condition is currently forecast in the STPASA period.
AEMO Operations Planning
The Forecast LOR1 condition in the South Australia region advised in AEMO Electricity Market Notice No. 73793 is cancelled at 1400 hrs 05/02/2020.
No LOR condition is currently forecast in the STPASA period.
AEMO Operations Planning
73844SETTLEMENTS RESIDUE05/02/2020 01:00:20 PM
[EventId:202002051300_NRM_SA1_VIC1_started] NEGRES CONSTRAINT NRM_SA1_VIC1 started operating from 05 February 2020 13:00
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1300 hrs on 5 February 2020
ACTUAL NEGATIVE SETTLEMENT RESIDUES - SA to VIC - 5 February 2020.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the SA to VIC directional interconnector.
The negative residue constraint set NRM_SA1_VIC1 commenced operating from 1300 hrs on 5 February 2020.
This constraint set contains an equation with the following interconnectors on the LHS:
V-S-MNSP1
V-SA
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1300 hrs on 5 February 2020
ACTUAL NEGATIVE SETTLEMENT RESIDUES - SA to VIC - 5 February 2020.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the SA to VIC directional interconnector.
The negative residue constraint set NRM_SA1_VIC1 commenced operating from 1300 hrs on 5 February 2020.
This constraint set contains an equation with the following interconnectors on the LHS:
V-S-MNSP1
V-SA
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
73838GENERAL NOTICE05/02/2020 10:53:44 AM
New synchronous generator combinations for the SA + APD + Mortlake Island for system strength and frequency control
AEMO ELECTRICITY MARKET NOTICE
AEMO has investigated combinations required for the extended operation of South Australia, Mortlake and APD connected as an island. Minimum combinations of synchronous generation in South Australia are:
1 - 1 x Torrens Island A unit + 2 x Torrens Island B units + 1 x Pelican Point GT/ST units + Osborne GT & ST
2 - 2 x Torrens Island A units + 2 x Torrens Island B units + Quarantine 5 + Osborne GT & ST
3 - 2 x Torrens Island A units + 3 x Torrens Island B units + Osborne GT & ST
The limits advice on the AEMO website will be updated shortly:
https://www.aemo.com.au/-/media/files/electricity/nem/security_and_reliability/congestion-information/transfer-limit-advice-system-strength.pdf?la=en
AEMO is continuing to investigate other synchronous generator combinations - these will be advised by future market notices.
Ben Blake
AEMO Operations
AEMO has investigated combinations required for the extended operation of South Australia, Mortlake and APD connected as an island. Minimum combinations of synchronous generation in South Australia are:
1 - 1 x Torrens Island A unit + 2 x Torrens Island B units + 1 x Pelican Point GT/ST units + Osborne GT & ST
2 - 2 x Torrens Island A units + 2 x Torrens Island B units + Quarantine 5 + Osborne GT & ST
3 - 2 x Torrens Island A units + 3 x Torrens Island B units + Osborne GT & ST
The limits advice on the AEMO website will be updated shortly:
https://www.aemo.com.au/-/media/files/electricity/nem/security_and_reliability/congestion-information/transfer-limit-advice-system-strength.pdf?la=en
AEMO is continuing to investigate other synchronous generator combinations - these will be advised by future market notices.
Ben Blake
AEMO Operations