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.
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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
Instances of system frequency outside the normal operating band
How common is it that mainland frequency deviates outside the NOFB (normal operating frequency band)?
(Two not one!) more media article (and 5, not 4, analysts) questioning Eraring’s mooted closure in 2027 … and same for other coal units
It was no surprise at all to open the AFR and see 4 different analysts quoted in voicing their concerns about the unrealistic notion that Eraring can close in 2027 ... or perhaps even...
Yes, Tamar Valley CCGT did switch off last week (on Wednesday 27th August 2025)
Looking back to Wednesday 27th August 2025, when Tamar Valley CCGT switched off.
Looking more at (commissioning) operations at Waratah BESS through August 2025
In this article we take a look at operations of Waratah BESS through August 2025 - including some large Dispatch Errors on several days: (a) including Fri 29th Aug 2025, and how WTAH1 apparently...
Guest Authored Posts
Runway cost allocation – ready for liftoff?
Allan O'Neil unpacks a proposal under consideration by the AEMC to apply “runway” cost allocation to contingency FCAS, explaining how this could materially change who pays for frequency security in the NEM.
What the hail is happening with Brisbane’s weather?
Anthony Cornelius from WeatherWatch explains the climate drivers behind Southeast Queensland’s unusually intense 2025 hail season — context that matters for those tracking how extreme weather is evolving and influencing the energy market.
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