Prices for Lower Regulation FCAS elevated across the mainland Sunday afternoon 21st September 2025
A short article looking at some elevated prices for Regulation Lower FCAS on Sunday afternoon 21st September 2025
A short article looking at some elevated prices for Regulation Lower FCAS on Sunday afternoon 21st September 2025
We noticed yesterday (Saturday 20th September 2025) a large afternoon dip in frequency down towards (but not outside) the limits of the NOFB - and briefly explore here.
Prompted by a presentation from CleanCo’s Rimu Nelson at the Queensland Energy Summit, Dan examines how operational and bidding patterns at Wivenhoe and Swanbank E have evolved since CleanCo assumed control in 2019.
On Thursday 18th September 2025, the much-awaited announcement has been made about our climate targets for 2035.
Today we received notification from ESIG of the release of their report ‘Testing the Performance of Grid-Forming Resources’.
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.
Returning for the second day of CEC QCES in the 'Long Duration Energy Storage' Oliver Nunn shared more insights from the Endgame modelling.
Flagging two charts that Rimu talked through to sum up some of the observations he made about some modelled results for some (unstated) year late in the next decade.
From the CEC QCES 2025 was this pair of charts that Rimu Nelson (from CleanCo) presented to illustrate the vastly different operating profiles for Swanbank E and Wivenhoe pumped hydro.
A short article to wrap up some of the content delivered in the Long Duration Energy Storage session at the CEC's QRES 2025.
Oliver Nunn from Endgame Economics argues that we must begin to think about the distribution of prices in the NEM as a function of weather.
Alice Matthews examines how approval times for renewables vary widely by state and technology — with NSW wind projects facing the longest delays.
The forecast differences would contribute to improved lower RMSE and MAE scores, relative to AWEFS_ASEFS, in the weekly performance assessment.
In today’s article (part 1 in this series) we present an example of biasing (at an unnamed solar farm), which we find aligns with FCAS cost mitigation.
47% of dispatch intervals for semi-scheduled solar units are seeing a self-forecast used. When there are gaps, was the unit suppressed?
Dan dives into the history of the NEM’s market cap and explores how high-end prices contribute to regional settlement costs and cap payouts.
We summarise how wind units are using self-forecasting to-date. The analysis leads us to consider where upcoming market change may lead the industry.
Dan shares a short time-lapse video which demonstrates four days worth of activity in the NEM, highlighting the impact of network congestion in QLD and NSW.
By day-end on the Friday the 7th demand levels were down more than 40% in the Gold Coast. Other areas were also impacted.
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.