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.
Read MoreWednesday 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 suspected to be the newly composed ‘N-BU_330_TX_ONE’ constraint set for an outage related to Project Energy Connect.
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 there was ~1,000MW more energy injected into the grid than required over a sustained period, what stopped the frequency flying through the roof?
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?
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 937MW drop in the 5 minutes to 17:15 NEM time, so I have taken an initial look
No sooner had we hit
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!
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 and time of the occurrence was…
An interruption to the NEM wholesale market data service resulted in a delay of data to industry today, 19 November, 2024.
A brief look into whether rooftop PV forecast were the driver behind the demand forecast glitch on 29 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;
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’.
An updated trend of system frequency to ~14:53 related to AEMO IT incident INC0136004 and Market Suspension.
AEMO declares that the suspension of the spot market will end at 1510 hrs on 05 September 2024.
AEMO declares the spot market suspended from 13:55 on Thursday 5th September 2024 until further notice.
A quick look at how System Frequency trended down with the IT issues experienced at AEMO impacting on the dispatch process.
Apparently some IT issues within the AEMO are causing issues with the AEMO dispatch process – on Thursday 5th September 2024.
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 to explore and explain.
Also last week, AEMO informed the market of the availability of a report outlining 18 discrete incidents, over a period of just under 3 years, that included SCADA failure in some way. The report also discusses what has been done to rectify.
A short note on Thu 21st March 2024, the day the AEMO notifies the market of a Scheduling Error (incident 60) spanning 24th January 2024 to 7th March 2024.