From 10:00 today (Friday 10th September 2021), ElectraNet’s new synchronous condensers (which have been under testing) will be deliver a boost to Semi-Scheduled units in South Australia.
This was noted yesterday by AEMO in Market Notice 90305:
Notice ID 90305
Notice Type ID New/Modified Constraints
Notice Type Description MARKET
Issue Date Thursday, 9 September 2021
External Reference Update to non-synchronous limits in South Australia
AEMO MARKET NOTICE
Refer to market notice 89336
As a part of the transition to new limits for the synchronous condensers in South Australia AEMO will increase the non-synchronous limit to 1900 MW. This limit will apply only under system normal conditions only – the current limit will apply for Davenport synchronous condenser or 275kV line outages.
No changes to the SA generator combinations will be made at this stage.
The revision to the limits will be implemented at 1000 hrs on Friday 10th September 2021 with the following changes:
The following constraint equation will be updated:
and the following removed:
Outage constraints will also be updated.
For more information refer to: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/related-resources/operation-of-davenport-and-robertstown-synchronous-condensers and the limits advice: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/congestion-information-resource/limits-advice
For further details on this change please contact firstname.lastname@example.org
For some context, readers might like to refer back to Allan’s article from 9th February about these ‘New Sources of Strength’.
Worth also noting that this (changed ‘S_NIL_STRENGTH_1’) is not the final form of the system strength constraints for South Australia (I believe) – my understanding is that the AEMO will modify them further in the weeks/months ahead.
Seems fairly certain that this record for ‘maximum wind output’ from Sunday 25th July 2021 won’t last too much longer as a result…
These instructions would also apply to licensed ez2view users, who can access a larger version of the Trends Engine platform in the ‘Trends Editor’ widget.