Which Semi-Scheduled units are registered to (and) provide PFR?
As at 4th May 2026 we publish what we know of the Primary Frequency Response (PFR) registration status of the fleet of Semi-Scheduled (i.e. Solar and Wind) units.
2020-09 Primary Frequency Response (PFR)
A collation of articles written over time specifically with respect to Primary Frequency Response (PFR) arrangements.
These were re-introduced to DUIDs in the NEM from September 2020 (for Tranche 1), followed by smaller units later. This was in response to a Rule Change made by the AEMC.
Submissions closing tomorrow (Wed 13th Aug 2025) to AEMO consultation on ‘Primary Frequency Response Test Guidelines for Semi-Scheduled Plant’
Worth noting, as I've just become aware, that submissions close tomorrow on AEMO's consultation on Primary Frequency Response (PFR) Test Guidelines for Semi-Scheduled Plant
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.
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 Years in the making The rule change proposal was initiated July...
Status Report from AEMO (as at 5th May 2023) – Implementation of PFR
Thought it would be useful to add in this (belated and back-dated) article with a link to the AEMO status update (from 5th May 2023) on implementation of PFR.
AEMC published final determination for ‘Primary frequency response incentive arrangements’
Some brief notes about the publication by the AEMC (on Thu 8th Sept 2022) of the Final Determination with respect to PFR Incentive Arrangements.
AEMC proposes PFR to remain mandatory–and big changes to causer-pays
The AEMC recently published a draft determination on Primary Frequency Response - proposing it remain mandatory, and to introduce big changes to the causer-pays process, including payments for good performance.
Moving from mandatory PFR to an arrangement that’s more durable
A quick synopsis of some market reforms at the AEMC relating to system frequency.
Observations of differences in system frequency in the Mainland NEM (comparing 2019 to 2021)
One of the many data sets being crunched as part of our analytical efforts underpinning the development of 'GenInsights21' is system frequency. In this short article today, we share some initial observations on how it has been changing.
What’s “Primary Frequency Response” and why does it matter anyway?
Paul McArdle recently drew my attention to a short Twitter thread started by David Osmond on the arcane topic of NEM system frequency behaviour: At Paul’s invitation I’ve dived further into this issue to fill in some background, provide additional data, and comment on...
Almost three years on – reflections on Frequency Control in the NEM
Guest author (and power system control specialist), Kate Summers, looks at what's changed since she published a paper on frequency control in the NEM back in January 2017.
Fast Frequency Service – Treating the symptom not the cause?
The National Electricity Market (NEM) is designed to operate at 50 Hz. Frequency deviation occurs when generation and load are mismatched. It is important in a lightly meshed and long network such as the NEM to maintain tight frequency control and that frequency response is...