Following requests from some readers here's an updated tabulation of 'frequency events' against large Aggregate Raw Off-Target across Semi-Scheduled units. Via @wattclarity.bsky.social, adding in 2025 Q3 and 2025 Q4-to-date: wattclarity.com.au/articles/202...

In what appears to be a repeat of (what we suspect) happened last week: 1) There's been a frequency excursion on Tuesday morning 11th November 2025; 2) Coincident with some large changes in 'Market Demand' in Victoria. wattclarity.com.au/articles/202... More @wattclarity.bsky.social

Hangover from Melbourne Cup, or exuberance about the '3 hours free power'? Market response to some massive (but phantom) ramp in Victorian demand at lunchtime Thu 6th Nov 2025 appear to have overcooked the system frequency. wattclarity.com.au/articles/202... More @wattclarity.bsky.social

~3 weeks after the #NEMdev2025 conference, and enroute to #AllEnergy2025, I found a bit more time to add to this thread of informal feedback on the Draft #NelsonReview report: wattclarity.com.au/articles/202... What are we missing?

Yesterday two units at Yallourn tripped - dropping frequency. However, this was *not* the worst frequency disruption on the day: (a) 2 periods of larger instability occurred. (b) both triggered by poor forecasting/dispatch for VRE Via @wattclarity.bsky.social wattclarity.com.au/articles/202...

Yesterday and today via @wattclarity.bsky.social, Dan Lee published Parts 1+2 of deeper dive into #CapacityInvestmentScheme Part 1 = wattclarity.com.au/articles/202... Part 2 = wattclarity.com.au/articles/202... Also today, Giles wrote about the same situation: reneweconomy.com.au/regulator-sa...

Yesterday (15th Sept) was day 1 of the CEC #QCES2025 ... with a couple speakers brought more sobering perspectives. Now some are shared here via @wattclarity.bsky.social : wattclarity.com.au/articles/202... Bring on the afternoon session for day 2!

This @wattclarity.bsky.social article worth highlighting for a few reasons: (a) speaks to (what seems to be) one growing cause of frequency imbalance/weakness; (b) some have suggested others read. wattclarity.com.au/articles/202... Interested in your thoughts?

Others might have titled this article from Linton Corbet as 'Primary Frequency Response (PFR) saves the day!' wattclarity.com.au/articles/202... ... but @wattclarity.bsky.social readers will recall I'm not a fan of such framing. The story has more nuances, so stay tuned for part 2 and so on...

This week (on Tue 19th Aug 2025) there was a pretty significant frequency spike in the NEM. Via @wattclarity.bsky.social already we've written 3 articles about this, progressively exploring what happened: (a) Causes (and implications) (b) What 'saved the day' wattclarity.com.au/articles/202...

Large spike in system frequency across the NEM on Tuesday 19th August 2025: (a) as high as 50.2Hz (b) lasting about a half hour (c) in the middle of the day. A first article by Linton is already @wattclarity.bsky.social : wattclarity.com.au/articles/202... ... more to come.

Second rumble today (with the 1st being earthquake felt in South-East QLD). This one being Basslink unplanned outage and loss of 292MW of 'Market Demand' in Tasmania on Saturday afternoon 16th August 2025: wattclarity.com.au/articles/202... via @wattclarity.bsky.social

8 days after Tim Nelson spoke at #ACES2025 (and 1 day after my wrap on @WattClarity) the draft report of the #NelsonReview panel is out: wattclarity.com.au/articles/202... Starters gun has sounded, 6 weeks until submissions close...

It's my 2nd day back in the office after a long break. Here's a list on @wattclarity.bsky.social about events, actions, comings and goings in the NEM over the past month or so: wattclarity.com.au/articles/202... ... includes #ACES2025 As the title asks, what (else) did I miss?

Am looking forward to catching up with friends, colleagues and clients at #ACES2025 in Sydney this week … might see you there? Last Friday on @wattclarity.bsky.social Dan Lee penned these ‘Four questions ...’: wattclarity.com.au/articles/202...

Two articles (somewhat related?) this morning on @wattclarity.bsky.social : 1) Record NEMwide wind production overnight: wattclarity.com.au/articles/202... 2) But then forecast load shedding in South Australia next Monday 30th June 2025: wattclarity.com.au/articles/202...

I won't be at #AustralianEnergyWeek this week in Melbourne, but expect there will be discussion of the news overnight in relation to the blackout on the Iberian Peninsula from back in April 2025: wattclarity.com.au/articles/202... via @wattclarity.bsky.social

Following yesterday evening's volatility (Wed 11th June 2025) across all regions in the NEM (quite rare that happens) we take a quick initial look at bidding behaviour across all units: wattclarity.com.au/articles/202... via @wattclarity.bsky.social for your perusal.

Yes indeed, there was a new record for NEM-wide wind production overnight (Mon 26th May 2025) ... up ~10% on the prior all-time record set almost exactly a year earlier: Details via @wattclarity.bsky.social here: wattclarity.com.au/articles/202...

There's been a large (i.e. 582MW) drop in demand in the Victorian region about half-hour ago this morning (Thu 10th April 2025). It appears real (there was a coincident rapid spike in frequency). Initial note here: wattclarity.com.au/articles/202... via @wattclarity.bsky.social with more to come.

via @wattclarity.bsky.social Josh Boegheim differentiates between: (a) Modelling storage (simplistically) with perfect foresight; and (b) Considering imperfect foresight (more like real world) wattclarity.com.au/articles/202... ... originally presented at CAEEPR in Nov 2024

Some @wattclarity.bsky.social articles re the (problems associated with the) delay in receipt of Dispatch Targets ... and one option being considered that some see as a 'solution' (but with respect to which we have concerns): wattclarity.com.au/market-refor...

Am listening into the AEMO briefing on 'observed outcomes of NFO for FPP' today ... so thought it was worth sharing two diagrams that summed up my growing understanding of what the Frequency Performance Payments changes mean: wattclarity.com.au/articles/202... via @wattclarity.bsky.social today.

Tying together 4 articles @wattclarity.bsky.social (+ the presentation by Linton and Dan to the @cleanenergycouncil.bsky.social audience on Monday, thanks to Christiaan for organising). References analysis completed by Jack Fox at ETSI with respect to NFO data: wattclarity.com.au/market-refor...

It's 12 weeks to go, until the transition to AEMO's new 'Frequency Performance Payments' process. Jack Fox from ETSI has been looking through early data since Dec 2024 and posts his first @wattclarity.bsky.social article highlighting some Winners and Losers: wattclarity.com.au/articles/202...

Worth also noting this here: home.global-roam.com/examples/202... Key points: 1) Our software and data services should be seamless. 2) Maybe some delays on other things (e.g. articles on @wattclarity.bsky.social and so on).

~2 weeks ago, the #AER published 'Compliance Bulletin' for Semi-Scheduled Gens (i.e. VRE), clarifying requirements in a few areas - importantly including: (a) The use of MaxAvail; and (b) Use of Self-Forecasting. We posted on @wattclarity.bsky.social : wattclarity.com.au/articles/202...

Valued guest author on @wattclarity.bsky.social, Allan O'Neil has fallen down a rabbit hole in providing us this wonderful explanation: wattclarity.com.au/articles/202... ... why the spot price is *not* simply just the highest-price bid dispatched!

Wow. The bottom has crashed out of the 'minimum demand' point for NSW on Sunday 16th February 2025, as noted via @wattclarity.bsky.social : wattclarity.com.au/articles/202...

Wednesday 12th February 2025 in SA was: (a) Very high demand; and (b) Very tight supplies. In this @wattclarity.bsky.social article we start to unpick: wattclarity.com.au/articles/202... ... plenty of questions emerge from this Part 1.

One of a number of articles via @wattclarity.bsky.social today - with a subset of these focused on South Australia and the *very* tight supply-demand situation unfolding on Wednesday evening 12th February 2025: wattclarity.com.au/articles/202...

Amongst articles published yesterday via @wattclarity.bsky.social, a note to say that the #GSD2024 is now released, and waiting for clients to download: wattclarity.com.au/articles/202... Now in its 7th annual incarnation: (a) printed copy at ~1,350 pages (b) PDF (c) Data Extract optional extra

Some quite notable peak demand outcomes recorded in this article for Monday 3rd February 2025: wattclarity.com.au/articles/202... ... for Victoria, South Australia and NEM-wide. @wattclarity.bsky.social

A quick article via @wattclarity.bsky.social about a large (and somewhat mysterious) apparent drop in NSW 'Market Demand' on Friday afternoon 31st January 2025: wattclarity.com.au/articles/202... If you know what happened (or have theories) please feel free to let me know?

Whilst we wait to see what unfolds today (Fri 24th Jan re peak demand etc), worth reflecting on contributions from various technology types in QLD on Wednesday 22nd Jan 2025, which saw a new all-time record for electricity demand: wattclarity.com.au/articles/202... via @wattclarity.bsky.social

More to come later (in subsequent articles via WattClarity ) ... but uncanny to note that ... (a) exactly a year on from 22nd Jan 2024 (when QLD blew the lid off its prior 'all time maximum' for demand (b) it's gone >100MW bigger on 22nd Jan 2025: wattclarity.com.au/articles/202...

It’s not often you pass the ’25 years of service’ milestone, so we thought we’d invest some time to provide this reflection on our 25th year of service in 'making complexity understandable' in Australia's National Electricity Market: home.global-roam.com/examples/202...

Not long into the new year and we're already seeing 'forecast LOR2' warnings from the AEMO looking at NSW on next Monday 6th January 2025, as noted via WattClarity here: wattclarity.com.au/articles/202... ... one more reason we'll be watching NSW on Monday next week.