Noting the dust storm on Monday 26th May 2025 – and impact on electricity supply-demand
Belatedly noting the dust storm that past through South Australia on Monday 26th May 2025, which Andrew Miskelly of Weatherzone documented in a video on Bsky.
All Posts
Evening price volatility in NSW on Sunday 1st June 2025
A short note with a NEMwatch snapshot at 17:15 to mark some low-level price action in NSW on Sunday 1st June 2025
Callide C back online, Sunday 1st June 2025
A short article to note that Callide C3 came back online in the early hours of Sunday morning 1st June 2025.
A trend of aggregate ‘Dispatch Error’ for each Semi-Scheduled fuel type on Monday 26th May 2025
Let’s now return to Monday 26th May 2025 to look at aggregate ‘Dispatch Error’ across both Semi-Scheduled fuel types for all dispatch intervals in the day.
A quick look at system frequency, with 2 x coal units offline overnight into Saturday 31st May 2025
It’s fitting to book-end the week with a look at frequency performance overnight (into Saturday 31st May 2025) with two coal unit outages in NSW overnight to see what happened in terms of more...
Two slides we might refer back to later, from the Nelson Review presentation (Thu 29th May 2025 in Brisbane)
As noted in yesterday evening’s article (about one big ‘wrinkle’), I was off to the Brisbane session of the Nelson Review today. Here's two slides that jumped out.
Evening volatility on Thursday 29th May 2025
A very short note with a snapshot of NEMwatch at 17:35 NEM time to mark the first dispatch interval this evening with a spot price above $1,000/MWh.
Poor dispatch performance of VRE (collectively) on Monday 26th May 2025 sufficiently large to drive frequency outside of NOFB
Prior to the Brisbane session of the Nelson Review Panel (on Thu 29th May 2025) we take a look at Dispatch Error in the 16:15 dispatch interval on Monday 26th May 2025 to see...
Price volatility in NSW on 28 May, 2025
The NSW dispatch energy price jumped to 17,560 $/MWh in the 16:50 dispatch interval on 28 May, 2025.
Was Monday evening’s new record wind production well forecast in advance?
Taking a closer look at the new 'highest ever' point for NEM-wide Wind Production on Monday 26th May 2025, and how well this was forecast in advance.
Guest Authored Posts
Not all renewable projects are created equal: Why approval times vary dramatically across Australia
Alice Matthews examines how approval times for renewables vary widely by state and technology — with NSW wind projects facing the longest delays.
Triple C conditions (cold, calm and cloudy) across the NEM last Thursday evening 26th June 2025
Carl Daley examines the underlying conditions and outcomes that occurred last Thursday evening, the 26th of June.
Detailed Analysis
Do you know your obligations as a Semi-Scheduled Generator?
This is the first of a short series of video snippets extracted from the 17th September 2020 presentation by Marcelle Gannon and Jonathon Dyson for the Clean Energy Council entitled 'Maximising Profitability in the...
Case Study – How to interpret a new NEM constraint and guess what it might do
Given the great interest in the new 'X5 constraint', guest author, Allan O'Neil, has invested some time to pick the new constraint equation to understand (and then explain) what it is, how likely it...
Semi-scheduled generation–what are the real issues?
Marcelle digs into the data to find out what the real issues are in the AER's proposed rule change for semi-scheduled generators.
Feedback we have received about the 2019 edition of our Generator Statistical Digest
Just over 4 months have passed since the release of the Generator Statistical Digest 2019. We take a look back at some of the compliments and comments we've received and seen from a variety...
Analytical challenge – recognising the separate components in Risk, and their influence
A simple refresher on two core components that combine in order to define risk - probability and consequence.
First look at South Australia islanded on Saturday evening, 16th Nov 2019
A first (and perhaps only - as this took longer than initially planned) walk through some of the interesting points of what happened yesterday (Sat 16th Nov 2019) when South Australia islanded from the...
Two big reasons why we’re engaging in forensic analysis of NEM events
There are a number of reasons why we're completing the analysis we are sharing via WattClarity - here are two big ones.
Do you know of people who can help us?
Readers at WattClarity might recall that we have asked the question above a couple of times in recent weeks – and a big thanks to those who responded already! We’re blessed with opportunities at...