Aggregate (estimated) curtailment of Large Solar exceeds 70% on Sunday 5th September 2025
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.
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Also difficult to see any fluctuation in Mainland Frequency on Sunday morning 5th October 2025, with BW02 offline (two-shifting)
Not seeing any obvious blip in system frequency (at the time BW02 came offline on Sat 4th Oct 2025) we also looked at the similar outage on Sun 5th Oct 2025.
Difficult to see any fluctuation in Mainland Frequency on Saturday morning 4th October 2025, with BW02 offline (two-shifting)
I was keen to see if there was any noticeable blip in System Frequency resulting from the BW02 unit coming offline on Saturday 4th October 2025 for the brief (two-shift) outage.
Talk about two-shifting … such as with BW02 on Saturday 4th and Sunday 5th October 2025
Today's LinkedIn update from Geoff Eldridge at GPE about two-shifting at BW02 (such as on Sat 4th Oct 2025 and Sun 5th Oct 2025) coincides with other investigations, and prompts me to take a...
AEMO issues (short-notice, short-lived) direction for System Strength in NSW on Sunday 5th October 2025
A short article for Sunday 5th October 2025 to record the Direction issued for System Strength for NSW on Sunday 5th October 2025
New lowest* point for NEM-wide Market Demand on Saturday 4th October 2025?
A snapshot from NEMwatch at 10:55 on Saturday 4th October 2025, highlighting NEM-wide ‘Market Demand’ down at 9,393MW - a new lowest point?
The ENTSO-E ‘Factual Report’ on ‘Grid Incident in Spain and Portugal on 28 April 2025’ is out
Some of our readers will be interested to note that the Factual Report into the ‘Grid Incident in Spain and Portugal on 28 April 2025’ was released on 3rd October 2025.
AEMO updated MT PASA guidance, on 3rd October 2025
Worth copying in here AEMO's Market Notice 129413 published late Friday afternoon 3rd October 2025 pertaining to the coming two-year period - because of some changes and other notes.
Belatedly recording the QLD LNP’s comments about ‘coal for decades’ in September 2025
I alluded to the following comments in Wednesday’s article about the possible early closure of Gladstone Power Station … though we did not have time to note them at the time. We were not...
VP5 into the Planned part of it’s lengthy Unplanned-Planned-Unplanned outage
On my commute this morning (Friday 3rd Oct 2025), I noticed this update on LinkedIn yesterday evening from the team at Delta Electricity, speaking about their annual shutdown at Vales Point 5.
Guest Authored Posts
The increasingly stochastic and volatile NEM
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.
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.
Detailed Analysis
The ENTSO-E ‘Factual Report’ on ‘Grid Incident in Spain and Portugal on 28 April 2025’ is out
Some of our readers will be interested to note that the Factual Report into the ‘Grid Incident in Spain and Portugal on 28 April 2025’ was released on 3rd October 2025.
Are CIS-ters doin’ it for themselves? Part 3: Treatment of curtailment risk
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...
Are CIS-ters doin’ it for themselves? Part 2: Understanding why there are delivery challenges
In part two of this four part series about the success of the CIS so far, we explore why delivery challenges may have emerged.
Are CIS-ters doin’ it for themselves? Part 1: Tracking the progress of CIS projects post-award
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.
A clean break: Wivenhoe and Swanbank operating profiles pre and post CleanCo takeover
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.
Highlighting particular (frequency and/or AggROT) events through 2024 and 2025
In this article, we tie together various events since 1st January 2024 that featured either System Frequency outside the NOFB and large AggROT for Semi-Scheduled assets.
An updated tabular list of instances of large AggROT across Semi-Scheduled units
Earlier today we trended the incidence of large Aggregate Raw Off-Target across all Semi-Scheduled units. In this updated tabulated list, we list each of the largest instances from January 2024 to June 2025.
Frequency performance payments 44 days in, part 2
Categories with a longer bar left of zero are losing more of their spot energy market revenue to regulation and PFR costs.