AEMC commences consultation on two Rule Change proposals, to do with Contingency FCAS
On 20 November 2025, the AEMC published one consultation paper in relation to two Rule Change Proposals relating to contingency FCAS (size, and cost allocation).
Reforms for Frequency Control
A collation of reforms relating to frequency control (including, but not limited to, FCAS)
Frequency performance payments 44 days in, part 2
Categories with a longer bar left of zero are losing more of their spot energy market revenue to regulation and PFR costs.
Frequency Performance Payments 44 days in
An initial review of payment and cost outcomes of the first 44 days of financial operation of the FPP arrangements.
The commencement of Frequency Performance Payments (FPP)
Yesterday (Sunday 8th June 2025) saw the commencement of the new Frequency Performance Payments (a.k.a. FPP) method.
Two diagrams to help illustrate the changes coming with FPP (Frequency Performance Payments)
We've facilitated a number of articles on WattClarity relating to the looming FPP changes (now 10 weeks away). Here's two images I've drawn up to (hopefully) illustrate my understanding of what these changes represent.
Generator exposure to regulation costs under FPP
In his third article, Jack Fox uses the Non Financial Operation (NFO) data to take a look at some VRE units, and how they would have performed under FPP.
The top 10 batteries under FPP
In his second article, Jack Fox uses the Non Financial Operation (NFO) data to take a look specifically at batteries, and how they would have performed under FPP.
An initial look at Winners and Losers from Frequency Performance Payments (FPP)
In his first article, Jack Fox reports some initial observations from a review of the Non Financial Operations (NFO) data that's been published since Dec 2024.
Three headline observations, about the use of proxies for System Frequency in Frequency Control mechanisms
Various authors have shared articles about frequency, frequency control and Regulation FCAS in recent times (including 6 from Linton). Here's three things that jumped out to me in these pieces of analysis.
Comparing Frequency Measures (Frequency, FI, FM)
The faster-moving nature of the FM, with the introduction of FPP, removes predictability in the indicator for frequency performance.
Only 14 weeks to go until Frequency Performance Payments
Full financial operation commences 8 June 2025.
Incentivising primary frequency response
The implementation of the Primary frequency response incentive arrangements rule is driving change in how system frequency is controlled and paid-for. The changes stem from how the NEM will incentivise primary frequency response. 6...
Very fast FCAS, 2024 in review
A 2024 review of the trend in the very fast FCAS services captures enablements, availabilities and costs.
Frequency Performance Payments project commences non-financial operation, 9th December 2024
AEMO's Frequency Performance Payments (FPP) project has commenced in production today under "non-financial operation" (NFO).
AER sends clear message on self-forecasting behaviours
Semi-scheduled generators shouldn't treat self-forecasts as commercial parameters. The regulator holds significant concerns with the biasing of self-forecasts for commercial benefit.
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.
Challenges with a global-only FCAS requirement
The very fast FCAS markets started on 9 October 2023 and now a Basslink outage presents a confusing situation for required and enabled levels.
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.
Very Fast FCAS – a week in review
The new 1-second FCAS markets have been operational since the 9th October. We take a look to find out how it has fared.
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...