The return to service of Callide B2 and C4 in October 2025, following storm issues
Following this update on LinkedIn from CS Energy on Thursday 30th October 2025, we summarise outages at Callide B2 (two outages) and Callide C4 (one outage).
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Loy Yang B1 returns to service after planned outage – not without a few wobbles (and frequency drop)
Loy Yang B1 has returned to service on Sunday morning 2nd November 2025 following a planned outage, not without some wobbles.
A quick look at Dispatch Error on Friday afternoon 31st October 2025, with the frequency drop
We’ve just noted the frequency drop on Friday afternoon 31st October 2025, and so take a look at 'Aggregate Dispatch Error’, to see if it's likely we are...
A second look at the frequency drop on Friday afternoon 31st October 2025
Yesterday afternoon, we quickly noted the ‘Frequency drop on Friday afternoon 31st October 2025’. Now, we take a closer look to highlight the lowest point (outside of the...
Vales Point 6 returned to service Friday afternoon/evening 31st October 2025 after tube leak outage
A short record of the unplanned outage at Vales Point 6 - which came offline overnight into Tuesday 28th October 2025, and returned to service Friday 31st October...
Frequency drop on Friday afternoon 31st October 2025
A short note with this snapshot of a 6-hour long frequency trace on Friday afternoon 31st October 2025, to capture what looks like another VRE-induced frequency wobble earlier...
Bidding algorithms: Don’t miss the forest for the trees
Declan Kelly from Flow Power follows up an earlier article discussing the impacts of algorithmic bidding, this time looking at some of the market benefits.
David Dixon speaks again about the large gap between aspiration and reality
Earlier on Day 2 at All Energy in the ‘National Electricity Markets’ session there were a number of interesting presentations, including one from David Dixon.
The ‘Reform of the NEM’ session at the tail end of Day 2 of All Energy 2025
A short note about today's graveyard shift session titled ‘Pushing Boundaries: Navigating Market Reform for a modern, efficient, and secure electricity system’ at All Energy. A session that...
Frequency wobbles on Thursday afternoon 30th October 2025
A short article highlighting some frequency wobbles on Thursday afternoon 30th October 2025.
Direction for System Strength in NSW again–on Thursday 30th October 2025
In a repeat of yesterday, the AEMO has again directed for System Strength in NSW on Thursday 30th October 2025.
Comparing AggROT for (44x) Coal Units with AggROT for Semi-Scheduled units through the history of the NEM
On Sunday (following from the discussion at the NEMdev conference in Brisbane a few weeks ago, and leading into this week’s All Energy 2025 in Melbourne) I highlighted...
Another direction for System Strength in NSW (on Wednesday 29th October 2025)
It's day 1 of All Energy 2025 today (Wednesday 29th October 2025) , and the day will have already started - but I thought it would be topical...
Frequency drop with trip of Callide B2 on Tuesday evening 28th October 2025
A short note to capture the trip of Callide B2 on Tuesday 28th October 2025 in the five minute period prior to 21:01 (NEM time) that day.
Sharp mainland frequency drop, with trip of CPP_4 on Sunday evening 26th October 2025
The Callide C4 unit tripped from 420MW in the 5 minutes to 18:36 (NEM time) on Sunday evening 26th October 2025, delivering a sharp drop in mainland frequency.
Two *big concerns* that we urge the Nelson Review panel to (re)consider (with respect to Invisible Responses) following review of the Draft Report
With All Energy happening this week in Melbourne, plus the clock ticking down on preparations at the Nelson Review Panel for their final report, I've reached back to...
Selected 4-second data relating to the (SemiSched-induced) frequency weakness on Thursday 16th October 2025 (i.e. Part 4)
In Part 4 of this evolving Case Study, we take a closer look (using 4-second data) at the 12 x offending Semi-Scheduled units that appear to have played...
AEMO announces that it’s ‘progressing transitional system security services’
A quick note to point readers here to the AEMO news update ‘AEMO progressing transitional system security services’ published today (Friday 24th October 2025).
A hot afternoon in NSW on Wednesday 22nd October 2025 (but the price did not pop … at least to 14:15)
A short article looking at the NSW region in early afternoon Wednesday 22nd October 2025.
WeatherWatch notes ‘Cyclonic Conditions for Victoria, Widespread Gales Across NSW & Areas of South Australia’
A short note (on Wednesday morning 22nd October 2025) about the Severe Weather warnings (from WeatherWatch, and then from AEMO).