A ~24 year trend of Regulation FCAS services, in two charts
A couple recent reasons prompt this long-range trend of Regulation FCAS services.
FCAS
AEMO initiates Expedited Consultation to address ‘spammy’ automated MII notices
AEMO announced an ‘Expedited consultation open on FCAS thresholds under AEMO’s automated procedures for identifying intervals subject to review’,
New FCAS resources dominate enabled levels in 2025
We find the trend for increasing enablement of the 'new' resources has only continued, that the new FCAS resources are the dominant providers of all FCAS services nowadays.
Yallourn Power Station no longer bidding FCAS services (as seen via GSD2025)
One of the things that jumped out to us with the GSD2025 was the confirmation that all four units at Yallourn Power Station continued the pattern of late 2024 in ceasing to offer any of the 10 x FCAS markets.
Who killed FCAS?
Alex Leemon looks at how FCAS bidding and enablement volumes have shifted over the past decade — drawing on New South Wales data — to unpack what’s been driving the post-2023 collapse in FCAS prices.
Volatility in FCAS (Regulation and Contingency) prices in Tasmania on Wednesday 5th November 2025
A quick record of some volatility today in Regulation (and Contingency) FCAS prices in Tasmania on Wednesday 5th November 2025.
Unit deviations from target on Tuesday 19th August 2025
It appears it was unit availability used to set the target for dispatch that went awry, rather than unit output.
Administered pricing for FCAS in South Australia from 05:20 on Sunday 17th August 2025 (part 1)
AEMO notes that 'it has determined that an administered price period will commence at the trading interval starting 0520 on 17 August 2025' for FCAS in South Australia. We take a quick look...
Volatility within the contingency FCAS market in SA today, Thursday 24th July 2025
A short post to note some price volatility for the 'Lower 1 Sec' contingency FCAS commodity in SA today, with prices flickering between the FCAS price floor and the market price cap.
Battery bidding is reshaping FCAS — But Demand Response remains a strategic asset
Paul Moore of Viotas look at recent supply-demand dynamics within the contingency FCAS markets and whether demand response can play a role.
What’s happened to those Semi-Scheduled units registered to provide FCAS?
Following a question from a client today, we take a quick look at (some of) what the GSD2024 reveals of FCAS market participation of Semi-Scheduled units.
New FCAS resources dominate enabled levels in 2024
Using the latest GSD – GSD2024 – we take the opportunity to reflect on FCAS enablement and how enabled levels are changing between technology types.
Regulation FCAS Costs in 2023
Following a presentation with the CEC, Linton shared some insights into FCAS Regulation costs for wind and solar units over last calendar year.
Aggregate enablement of RaiseReg FCAS from units in the mainland (excluding Basslink) on Tuesday 13th February 2024
A short article trending (through Tue 13th Feb 2024) aggregate enablement of Raise Regulation FCAS in DUIDs on the mainland ... i.e. excluding Basslink.
GSD 2023 Uncovers Features in FCAS Enablement and Bidding
The release of GSD2023 supports a deep dive into its 10-year FCAS history section. We inspect three units of differing technology and make use of the data extract to uncover trends in participation.
Very fast FCAS markets continue to grow
Six observations from a chart summarising how capacity, availability and volumes enabled have changed over the early phase of the very fast FCAs markets, since commencement on October 9, 2023.
Very fast raise service to be expanded
The requirement for the very fast raise contingency service is set to increase to 100 MW. We review availability and bids to consider the impact.
AGL (Bayswater and Loy Yang A) fined for inability to supply FCAS services
An article in the Australian this morning alerted me to yesterday's Federal Court ruling against AGL Energy for not supplying contingency FCAS services (from Bayswater and Loy Yang A) when enabled by NEMDE. Here's a quick look...
Measurement timeframes for Raise Contingency FCAS … from the MASS Version 8
Because we’ll be referring back to it in future, we’ve lifted out Figure 8 from the MASS version 8 (p36/39) and included it here in this belated (and back-dated) article
Very Fast Raise and Lower FCAS markets to start on 9 October 2023
Very Fast FCAS, because it operates at a faster timescale, can arrest the rise or fall in frequency more rapidly than the current fast service and therefore provides an avenue to mitigate the costs of needing to procure increasing levels of the existing fast service....