AWEFS and ASEFS dispatch availability forecast outage on 11 March, 2025
AWEFS and ASEFS dispatch availability forecast systems experienced what looks to be an outage and we uncover how the 'SCADA' origin filled the gap.
Operational Glitches
Gremlins in AEMO systems publish rogue APC alert for South Australia, Sunday 9th March 2025
Which much attention focused on Queensland (in the wash out that has been TC Albert) a rogue Administered Pricing Notice (MN125439) for South Australia was a head scratcher, on Sunday 9th March 2025.
Whiplash abated … market oscillations stopped on Wednesday afternoon 12th February 2025
Following an earlier article (on Wednesday morning 12th February 2024) we note the end of oscillations related to the newly composed ‘N-BU_330_TX_ONE’ constraint set for an outage related to Project Energy Connect.
Whiplash from yo-yo-ing prices (and hence targets etc) on Wednesday morning 12th February 2025
Wednesday morning 12th February 2024 sees rapid and large oscillations in prices across all regions - which results from (and/or leads to) oscillations in output of many units. One of the contributing factors is...
Last Friday’s large and (mysterious) apparent drop in NSW ‘Market Demand’ (part 3) … what helped restrain frequency?
Friday 31st January 2025 (appeared to) experienced a very large drop in demand in NSW in a single dispatch interval - but we're now suspecting some form of data/operational glitch. However we wonder, if...
Last Friday’s large and (mysterious) apparent drop in NSW ‘Market Demand’ appears some data glitch?
Taking a second look at the (apparent) large drop in NSW 'Market Demand' on Friday afternoon 31st January 2025. Was it a data glitch instead?
(Mysterious and) Large drop in NSW ‘Market Demand’ late afternoon Friday 31st January 2025, prompting questions … part 1
Coincident with the walk home this afternoon/evening, the ‘Notifications’ widget in one of our display copies of ez2view alerted us to a large drop of ‘Market Demand’ in the NSW region … at a...
‘Market Demand’ in Victoria (apparently!) drops 3,100MW in 5 minutes, on Monday 9th December 2024 … a data glitch?!
No sooner had we hit on the article ‘‘Market Demand’ in Victoria ramps by 903MW in 10 minutes, on Monday 9th December 2024’ than we see an even larger, and faster, ramp down in...
‘Market Demand’ in Victoria ramps by 903MW in 10 minutes, on Monday 9th December 2024
In Victoria on Monday afternoon 9th December 2024 we see 'Market Demand' has ramped up by 1,802MW in 25 minutes (including a ramp of 903MW in 10 minutes). Yikes!
Dispatch systems interruption on 2nd December, 2024
A brief note to record a NEM production systems incident today, December 2, 2024. AEMO declared a major incident (INC0138848) for the Electricity Market Management System service with 4 Dispatch intervals missed. The date...
Interruption to electricity market data on 19 November, 2024
An interruption to the NEM wholesale market data service resulted in a delay of data to industry today, 19 November, 2024.
P30 demand forecast glitch hunches
A brief look into whether rooftop PV forecast were the driver behind the demand forecast glitch on 29 October 2024.
Glitch in P30 demand forecast for QLD on Tuesday evening 29th October 2024
A short (and belated) article with respect to a sizeable error in P30 predispatch forecast for ‘Market Demand’ in QLD on Tuesday evening 29th October 2024;
AEMO publishes interim report on Market Suspension on Thu 5th Sept 2024
Eight days after the event occurred, on Friday 13th September 2024 the AEMO published this ‘Preliminary Report: NEM Market Suspension on (Thursday) 5 September 2024’.
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.
Missing megawatts and phantom generation
Seven days ago, AEMO notified the market of a Scheduling Error from 24th Jan 2024 to 7th March 2024. A client asked us what it meant - so guest author Allan O'Neil has helped...