Worth a short note today (Wednesday 3rd September 2025) to record AEMO’s Market Notice 128912 published at 16:10 as follows:
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MARKET NOTICE
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From : AEMO
To : NEMITWEB1
Creation Date : 03/09/2025 16:10:56
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Notice ID : 128912
Notice Type ID : GENERAL NOTICE
Notice Type Description : Subjects not covered in specific notices
Issue Date : 03/09/2025
External Reference : Updated generator combinations in SA and system strength in NSW
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Reason :
AEMO MARKET NOTICE
Refer to market notices 93862 and 114893
AEMO has been working with Electranet on moving to a single synchronous generator operation in South Australia. The revised generator combinations and the conditions for their use are detailed in a revised limits advice which was published on the AEMO limits advice today.
Additionally, Transgrid has provided an update to the system strength requirements for NSW.
Both advice have been published on the AEMO website today here:
For further details on this constraint equation please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations
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END OF REPORT
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Earlier Market Notices
The notice above references two earlier Market Notices – in reverse chronological order as follows:
Market Notice 114893 on WHEN
To come…
Market Notice 93862 on 14th January 2022
This one spoke as follows:
‘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):
For further details please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations’
Market Notice 92769 on 26th November 2021
This one spoke as follows:
‘Refer to market notice 92718
AEMO has published 15 new generator combinations for four synchronous condenser operation in South Australia.
These new 15 combinations (as well as the 6 published previously) apply under system normal, risk of islanding and SA island conditions.
For more details on the new combinations please refer to the updated limits advice (which was been published today):
For further details please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations’
Market Notice 92718 on 25th November 2021
This one spoke as follows:
‘Refer to market notice 91942
AEMO and ElectraNet have been working on moving to four synchronous condenser operation in South Australia. Due to current market and power system conditions AEMO is moving to four synchronous condenser operation for system normal conditions as of 1900hrs 25th November 2021.
Refer to the six generator combinations in Table 3 of the current limits advice (v39) here:
Further SA generator combinations will be published tomorrow.
SA operation factsheet:
For further details please contact ben.blake@aemo.com.au
Ben Blake
AEMO Operations’
Etc…
If time permits, might fill in more history here
Hi Paul
Is it possible to have an article that summarises minimum synchronous generator requirements across each of the NEM regions as they are current set, and how they are planned to reduce – assuming that is actually the case. Feel free to remind me I’m attempting to simplify a complex set of rules
Thanks for the idea Paul, it’s certainly something we want to cover so I’ve added this to my to-do list — though I can’t say exactly when I’ll be able to get to it.
Dan