AEMC publishes consultation paper on ‘Dispatch limits for inverter-based resources’ Rule Change Proposal
Last Thursday 27th August 2026, the AEMC published a consultation paper with respect to ‘Dispatch limits for inverter-based resources’.
Market Reform
How the CIS differs from state-based underwriting schemes, and what the industry has suggested about it so far
We look at five design differences between the Capacity Investment Scheme and the state auction schemes that came before and alongside it — and the improvements we've heard suggested by industry and the Nelson Review panel.
Revisiting the CIS-awarded project pipeline, ahead of the ESOO 2026
A year on from our 4-part series about the CIS, we take an updated look at the 89 projects awarded across the scheme's five NEM tenders — comparing what proponents have actually announced compared to the status AEMO assigns them for ESOO reliability modelling.
FPP-Reg-FCAS Recovery: to what extent has it succeeded, and could it be improved?
In the final part of this series, David Scott asks whether MPFR and FPP-Reg-FCAS Recovery have delivered on their goals, then uses the data to explore how AEMO might procure Regulation FCAS more dynamically and tune AGC to make better use of it.
FPP-Reg-FCAS Recovery a year on: results and behaviours
In part three of this series, David Scott examines the first year of FPP-Reg-FCAS Recovery settlements, revealing which technologies paid and which were paid, and showing how semi-scheduled wind and solar farms, scheduled generators and batteries have each responded to the new incentives.
How MPFR, AGC and FPP-Reg-FCAS Recovery work together
In part two of this series, David Scott dives into AEMO's 4-second FPP data to show how dispatch errors are classified as good or bad, how Regulation FCAS usage is measured, and how these calculations translate into FPP payments and Reg-FCAS Recovery charges.
A recap on the objectives of the reforms for Mandatory Frequency Response, Frequency Performance Payments, and Regulation FCAS cost recovery
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.
(Belatedly) noting AER’s consultation on possible updates to the ‘Rebidding and Technical Parameters Guideline’
On 24th March 2026 (i.e. 3 months ago now), the AER published this Consultation paper into possible updates to the AER’s ‘Rebidding and Technical Parameters Guideline’.
One Year of Frequency Performance Payments: Impact on Solar Farms
Guest author (Dr Julian de Hoog) provides some analysis of what has unfolded over the first year of operation of the new Frequency Performance Payments, (FPP) regime - with a particular focus on solar farms.
AEMO workload overload triggers rethink of IPRR implementation (now proposed ‘staged delivery path’)
Worth a short note to link to this consultation paper from the AEMO re the proposed ‘Development of a staged delivery path (with respect to IPRR)’ … which was published yesterday (Monday 1st June 2026).
Snippets from ‘Workshop 3’ (on 11th May 2026) with respect to the ST PASA Replacement Project
We’re approaching the end of May 2026, which means we’re almost 10 months since the 31st July 2025 go-live date for unit-level data (and other changes) in ST PASA. … our ez2view software was upgraded to v9.12 in June 2025 in anticipation of those changes,...
Early application of revised transmission STIPS
Another short article that might be somewhat cryptic to some readers – pointing to today’s Final Determination from the AEMC about the ‘Early application of a revised transmission Service Target Performance Incentive Scheme’ (a.k.a. STIPS).
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.
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’,
Review launched, of AEMO Governance
On 5 February 2026, the Minister for Climate Change and Energy announced a review of the governance arrangements of the Australian Energy Market Operator (AEMO).
The NEM’s first solar-battery hybrid, Quorn Park, enters testing
The NEM’s first true solar-battery hybrid in the NEM — the 98 MW Quorn Park Solar Hybrid with a 20 MW BESS — has begun testing as the inaugural “mixed” Aggregate Dispatch Group under AEMO’s new rules.
Semi-dispatch caps are loading the deviation dice
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.
AEMO propose rule change to reform compensation frameworks
The AEMO have proposed a rule change to consolidate and streamline the NEM’s various compensation schemes, in an attempt to address some of the issues identified from the June 2022 market suspension.
Final Nelson Review report and ministerial communique released on Tuesday 16th December 2025
The final report of the Nelson Review has been released alongside a ministerial council communique, with ministers agreeing in principle to the review’s core recommendations, with the exception of Queensland.
Runway cost allocation – ready for liftoff?
Allan O'Neil unpacks a proposal under consideration by the AEMC to apply “runway” cost allocation to contingency FCAS, explaining how this could materially change who pays for frequency security in the NEM.