Callide C4 offline again, as planned–but outage extended. Have they found something?
A short update (on Friday 6th September 2024) about Callide C4, which has come off for a planned outage as part of its (re)commissioning process.
Eventful Days
There was a second drop in System Frequency on the Mainland (at ~16:45) on Thursday 5th September 2024
There were two significant drops in frequency on Thursday 5th September 2024. Whilst the first coincided with (brief) Market Suspension, in this article we take a look at the second (around 16:45).
This seems a rare instance? … an AEMO Direction in NSW (in this case to Snowy Hydro)
Market Notice 118151 jumped out at me, because it pertains to an AEMO Direction to a Market Participant in NSW. Can’t recall seeing that very often?
Recovery of System Frequency on Thursday 5th September 2024
An updated trend of system frequency to ~14:53 related to AEMO IT incident INC0136004 and Market Suspension.
AEMO issues Market Notice for Market Resumption at 15:10
AEMO declares that the suspension of the spot market will end at 1510 hrs on 05 September 2024.
AEMO declares Market Suspension from 13:55 on Thursday 5th September 2024
AEMO declares the spot market suspended from 13:55 on Thursday 5th September 2024 until further notice.
Drop in System Frequency on the Mainland on Thursday 5th September 2024
A quick look at how System Frequency trended down with the IT issues experienced at AEMO impacting on the dispatch process.
Gremlins in the dispatch process? (Thursday 5th September 2024)
Apparently some IT issues within the AEMO are causing issues with the AEMO dispatch process – on Thursday 5th September 2024.
Which Solar Farm DUIDs were curtailed at 12:35 on Sunday 1st September 2024?
On Sunday 1st Sept 2024, aggregate curtailment of Solar Resource from (Semi-Scheduled) Large Solar across the NEM reached 79.2% … in this follow-on article we explore the question ‘WHICH Solar Farms were curtailed … and WHY?’
Comparing winter temperatures at Archerfield over 19 years of history
A couple days after the end of ‘winter 2024’ the temperature has dropped by 10 degrees in Archerfield. We take a look at how temperatures in Archerfield through winter 2024 compare with the 18 preceding years to see how remarkable was the ramp in temperatures at the end of August 2024.
Curtailment of Wind Resource (i.e. Semi-Scheduled) across the NEM reaches 53.6% on Sunday 1st September 2024
Whilst not reaching the heights of curtailment of Semi-Scheduled Large Solar, on Sunday 1st September 2024 curtailment of Wind yield across the NEM reached as high as 54%.
Curtailment of Solar Resource from (Semi-Scheduled) Large Solar across the NEM reaches 79.2% on Sunday 1st September 2024
On Sunday 1st September 2024 curtailment of Large Solar yield across the NEM reached as high as 79.2%.
High wind yield in recent days … but *not* a new all-time record
A look back over the strong wind farm production over recent days, to Monday 2nd September 2024.
AEMO extends ‘Severe Weather’ warning from TAS into SA and VIC
Overnight into Monday 2nd September 2024, the AEMO has extended its Severe Weather warning into SA, and then into VIC.
‘Minimum Demand’ point for NSW drops 226MW from last year’s low point (on Sunday 1st September 2024)
On Sunday 1st September 2024 the ‘minimum demand’ point in NSW ratcheted lower still – a drop of 6% on the preceding ‘lowest ever’ point set just over 10 months ago.
Many localised network outages across Tasmania, on Sunday 1st September 2024
With the Severe Weather persisting in Tasmania into Sunday 1st September 2024, reports suggest ~5% of the population without power due to many localized network outages.
‘Widespread abnormal conditions’ in Tasmania, on Saturday 31st August 2024
Saturday 31st August 2024 also sees AEMO issue a Severe Weather Warning for Tasmania
‘Market Demand’ in NSW briefly drops to 3,650MW on Saturday 31st August 2024 – a new all-time low point
Saturday 31st August 2024 saw warm temperatures and high rooftop PV yield contribute to a new low point for ‘Market Demand’ in NSW
Return to service commences for Callide C4 on Friday 30th August 2024 (after 1193 days offline)!
It’s Friday 30th August 2024 and Callide C4 has commenced its return-to-service (and re-commissioning), after an outage lasting 1193 days
Cumulative Price in VIC drops negative (but *not* the first time ever!) on Thursday 29th August 2024
On Thursday 29th August 2024 the Cumulative Price in Victoria dropped below $0/MWh … but Dan Lee noted not for the first time ever in any region.