NEM demand tragic and occasional WattClarity guest author Allan O'Neil drills into an apparent discrepancy in AEMO's demand calculations following the 1 July 2026 transition of the Basslink interconnector from MNSP market participant to Regulated status.
At 12:32:03 on Wednesday 12th August 2026, the AEMO published MN144798 which noted 'AGC Heart Beat has been resolved'. This obviously raises other questions we will be interested to learn more about...
In the first of this four-part series, David Scott explains how loosening frequency control in the NEM led to Mandatory Primary Frequency Response in 2020, and how that problem resurfaced as a settlements issue behind 2025's Frequency Performance Payments and Regulation FCAS reforms.
A couple recent reasons prompt this long-range trend of Regulation FCAS services.
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.
Following a growing number of articles on WattClarity about “VRE under-performance dragging frequency down”, guest author Allan O'Neil takes a look at how the one sided nature of the SDC plays a role - and suggests a possible action that would help.
A quick record of some volatility today in Regulation (and Contingency) FCAS prices in Tasmania on Wednesday 5th November 2025.
A short article looking at some elevated prices for Regulation Lower FCAS on Sunday afternoon 21st September 2025
Back in July 2025 we saw the AEMO had released this ‘Technical Review of the NEM Frequency Control Landscape’ … but are only noting this here now.
Categories with a longer bar left of zero are losing more of their spot energy market revenue to regulation and PFR costs.
An initial review of payment and cost outcomes of the first 44 days of financial operation of the FPP arrangements.
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.
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.
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.
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.
This article reviews regulation FCAS costs in 2024, relative to maximum capacity, and uncovers drivers behind high non-scheduled unit costs.
The introduction of frequency performance payments in 2025 changes how costs of regulating frequency are quantified and allocated. This article inspects historical trends in regulation FCAS enablement levels and prices.
The faster-moving nature of the FM, with the introduction of FPP, removes predictability in the indicator for frequency performance.
Full financial operation commences 8 June 2025.
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...