Recording a ~500MW ramp and subsidence in ‘Market Demand’ in South Australia on Saturday 22nd February 2025 (including a drop of 229MW in 5 minutes).
Read MoreSome recent questions prompted this more granular look at NEM Mainland Frequency on Thursday afternoon 13th February 2025
Here’s a first look at (generating lots of questions about) Hamilton Solar Farm, and particularly the Availability forecast, back on Wednesday 12th February 2025.
A second article for Thursday 20th February 2025 looking at a noticeable jump in ‘Market Demand’ in NSW
A short (and perhaps cryptic, or perhaps useful) initial look at some (what might appear to some) ‘rogue’ price forecasts in P5 predispatch for the NSW region on Thursday 20th February 2025.
Prompted by a question by a client in a training session for a new ez2view user, guest author Allan O’Neil has written 2,940 words to explain the price outcome in one particular dispatch interval for one particular region (19:05 on Tuesday 11th February 2025 in South Australia). Strap in, because it’s a good illustration of why the simple ‘merit order’ bid stacking model is sometimes (often!) way too simplistic!
About 150 minutes after the earlier (apparent) drop in NSW ‘Market Demand’ there’s a second drop that’s not quite so big, but still sizeable.
Whilst looking at system frequency, there was an apparent trip of the Callide B2 unit in the early hours of Wednesday morning 19th February 2025.
That alert in ‘Notifications’ widget in ez2view (looking at large change in ‘Market Demand’ in NSW) has triggered again at 11:51 (NEM time) on Wednesday 19th February 2025.
A relatively large jump in ‘Market Demand’ in the NSW region from 16:05 to 16:10 on Tuesday 18th February 2025 caught our attention.
Given the situation that unfolded on Sunday 16th February 2025, we take a look at curtailment of Large Solar production (not quite a record).
Second article pertaining to the remarkably low level of ‘Market Demand’ in NSW on Sunday 16th February 2025.
The bottom has dropped out of the ‘record minimum demand’ point for NSW on Sunday 16th February 2025.
A quick note with snapshot taken at ~15:11 on Thursday 13th February 2025 looking back at the past 6 hours of NEM Mainland Frequency.
If I had time, we’d explore three separate questions we have about what happened in South Australia on Wednesday 12th February 2025. In this article we take a first pass at one of those questions … what was the state of play in terms of contributions to meeting the very high level of demand?
A follow-on article focused on the 19:00 dispatch interval on Wednesday 12th February 2025 in South Australia (a very tight period for supply-demand balance).
Tuesday 12th February 2025 is seeing very high levels of ‘Market Demand’ into the evening in South Australia.
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.
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 suspected to be the newly composed ‘N-BU_330_TX_ONE’ constraint set for an outage related to Project Energy Connect.
With warnings that tomorrow could see high (higher!) demand in South Australia, we take a quick look at high demand experienced on Tuesday 11th February 2025.