Newport Power Station running, with Yallourn’s yips yielding 1 unit operations
We noticed Bruce Mountain’s comments on LinkedIn about Newport power station running overnight, so had a look in ez2view.
All Posts
Noting the NERC Alert ‘Large Load Interconnection, Study, Commissioning, and Operations’
A quick note to call attention to this recent alert from NERC with respect to ‘Large Load Interconnection, Study, Commissioning, and Operations’
Wobbles at Yallourn unit 4
A brief look at recent operational challenges at Yallourn unit 4.
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.
Outage at Vales Point unit 5 extended – return to service now not expected until 15th December 2025
Subsequent to earlier article about VP5, the expected duration of the outage pushed out by more than a month.
AEMO notes ‘New Victorian system normal constraint to manage contingency size on north-west Victoria’
The AEMO notifies that the new 'V_NWVIC_GFT1_750' constraint equation will first be invoked from 10L00 on Tuesday 9th September 2025.
Vales Point unit 5 (partly unplanned) outage – return to service currently expected 9th November 2025
On Tuesday 26th August 2025 the VP5 unit came offline, with rebid reasons suggesting that ‘turbine vibrations’ were a factor. We take a look ~10 days later.
Daily NOFB exceedances since 2021
We count the number of days each month when there was at least one 4-second measurement outside the NOFB.
AEMC releases July 2024 working paper ‘Addressing the risk of algorithmic collusion’
Today we were alerted that the AEMC had belatedly published this 15-page Staff Working Paper titled ‘Addressing the risk of algorithmic collusion’.
AEMO initiates new operational requirements in SA (1 synchronous unit, in certain circumstances) and NSW (system strength)
Worth a short note today (Wednesday 3rd September 2025) to record AEMO’s Market Notice 128912 published at 16:10
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
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.
Basslink flows shift since end of agreement on 30th June 2025
An agreement restraining how Basslink is bid into the energy market has ended, resulting in changes in bidding and energy flows.
Frequency Performance Payments 44 days in
An initial review of payment and cost outcomes of the first 44 days of financial operation of the FPP arrangements.
The trend continues: a review of Q2 2025 spot prices
For nearly a decade, we’ve published annual reviews of Q2 prices to highlight the growing volatility during this period. Here’s our latest edition, examining how Q2 2025 compared.
ENTSO-E is also investigating the 28th April 2025 blackout on the Iberian Peninsula
For those interested in ‘what happened, why and what should be done about it’ with respect to the 28th April 2025 blackout on the Iberian Peninsula, ENTSO-E is also investigating.
Red Electrica report on the “Blackout in Spanish Peninsula Electrical System on 28th of April 2025”
On Wednesday 18th June 2025 Red Eléctrica (REE) published on the “Blackout in Spanish Peninsula Electrical System on 28th of April 2025” .