System Strength considerations for NSW via Market Notices … a low point reached in 2023 Q4

In the snapshot from NEMwatch used in the article ’A burst of spot price volatility in QLD and NSW on Tuesday 20th February 2024’ just now, I’ve highlighted two particular Market Notices as follows:

Updated System Strength Combinations for QLD

At 07:23 this morning, the AEMO published Market Notice 114889 related to ‘Update to system strength constraints in North Queensland’.

Now these notices are reasonably common, and we’ve written about them before here (and clients using their own copies of ez2view can explore in more detail), so we’ll leave this here for now…

System Strength Requirements in NSW

Where it gets more interesting is this short-and-sweet Market Notice 114893 published by the AEMO at 16:25:55 as follows:


From :              AEMO
To   :              NEMITWEB1
Creation Date :     20/02/2024     16:26:55


Notice ID               :         114893
Notice Type ID          :         GENERAL NOTICE
Notice Type Description :         Subjects not covered in specific notices
Issue Date              :         20/02/2024
External Reference      :         System Strength Requirements in NSW


Reason :


Transgrid has provided an update to the system strength requirements for NSW and this has been published on the AEMO website today:
Ben Blake
AEMO Operations


On first glance, I don’t remember seeing something like this for NSW beforehand … or perhaps I am mistaken?

The URL in the notice links to the following page, which I have scrolled down to find what TransGrid provided:


Here’s the 5-page TransGrid document ‘Interim Advice for System Normal Requirement’ from TransGrid dated Wednesday 14th February 2024 (would not have had many takers if released the day after 13th February 2024):


The first paragraph includes:

‘An amount of synchronous generation is required to be in service to allow for the stable operation and protection of the New South Wales transmission network. Transgrid and AEMO have jointly determined and agreed that this can be achieved if the equivalent of six large synchronous generators are in service. If the equivalent of six of these generators are in service the network is considered to have enough synchronous generation to be in a satisfactory state. Allowing for a single credible contingency, if the equivalent of seven of these generators are in service, the network is considered to be in a secure state.’

Happy reading!

PS remember 14th November 2023 in NSW

Worth reminding readers of the ‘Forecast low System Strength of concern in NSW for Tuesday 14th November 2023 … first time ever?’ here:


About the Author

Paul McArdle
One of three founders of Global-Roam back in 2000, Paul has been CEO of the company since that time. As an author on WattClarity, Paul's focus has been to help make the electricity market more understandable.

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