Nadali and Adviath from EPEC Group explain how VicGrid's Grid Impact Assessment will decide which non-REZ projects can connect — and present a Victorian BESS case study to argue that a market-informed headroom assessment is a better approach than a handful of PSS/E snapshots.
This latest instalment of our annual review into solar and wind farm curtailment across the NEM, looks at outcomes in 2025 and highlights increasingly divergent results by region and by asset as network constraints, pricing dynamics and seasonal weather conditions interact.
Today we’ve released the Generator Statistical Digest 2025 — the latest edition of our annual, unit-level reference report on generator performance across the NEM.
Today in NSW we saw large price spreads, material network curtailment, wild swings in demand, and several other factors unfold. This article summarises some of the high-level drivers of today's events.
On the prior weekend (Saturday 4th October 2025 and Sunday 5th October 2025) we saw high levels of aggregate curtailment across all Large Solar Farms.
In part three in this series about the CIS, we look at how a curtailment provision — briefly included in drafts for Tender 1 but later removed — may raise questions about how revenue floor bids were priced.
On LinkedIn someone wrote about the QLD price dropping to the Market Price Floor for the 10:05 and 10:10 dispatch interval today (Mon 29th Sept 2025). So I had a quick look
Recent debate has centred on the CIS’s success so far. In part one of this four-part series, we look at how projects have progressed since being awarded a contract.
An open question to our readers.
A short post to note that the AEMO has released its 2025 ELI, the second such edition of this annual report.
It was now just over 5 years ago when Marcelle wrote ‘Not as simple as it appears – estimating curtailment of renewable generation’. This week's invocation of the 'N-DPWG_63_X5' constraint set provides a great case study to illustrate some of the complexities!
At 17:44 yesterday (Monday 23rd June 2025) the AEMO issued MN127743 noting an unplanned outage of Darlington Point - Wagga No.63 330 kV line (leading to the ‘N-DPWG_63_X5’ constraint set being invoked)
After reviewing the latest version of our Generator Statistical Digest (GSD), David Leitch shares his top insights about VRE curtailment across the NEM in 2024.
Drawing from our freshly released GSD2024, Dan provides some deeper insights into curtailment in the NEM, beyond the headline totals that were a topic of much online discussion earlier this week.
After a suggestion from a reader, Dan plots the locations of the 19 winning CIS projects announced last week against economic and network curtailment data.
On Sunday 1st Sept 2024, aggregate curtailment of Solar Resource from (Semi-Scheduled) Large Solar across the NEM reached 79.2% ... in this follow-on article we explore the question 'WHICH Solar Farms were curtailed ... and WHY?'
A short record of some large curtailment of Large Solar resource on Saturday 24th August 2024.
A quick look at the ‘N-DPWG_63_X5’ constraint set as a driver for the curtailment of solar (and other) units in south-western NSW on Monday 24th June 2024.
A deeper dive into the geographic spread of wind farm generation and curtailment last Wednesday evening including a look into wind conditions and network topology.
A chart of the the month-by-month semi-scheduled economic and network curtailment totals, along with the top 3 worst hit units over 2023.