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!
Allan O’Neil takes a closer look at Victorian electricity demand on Sunday, February 2nd — which stood out as an unprecedented anomaly when looking at the history of weekend demand in the region.
Guest author Allan O’Neil looks at how operation of Project EnergyConnect Stage 1 may affect market outcomes, with some early indications that impacts won’t be as straightforward as you might think.
A very quick post to look at one of the several reasons we are seeing LOR3 and LOR2 forecasts for NSW and Queensland respectively next Wednesday (27 November). Previous posts from Paul (including this one) have looked at a range…
Guest author Allan O’Neil examines some recent episodes of price volatility (particularly 30th July to 5th August 2024) and whether they were driven by a shortage of supply, or other factors.
Following on from earlier articles about price volatility on Tue 30th July 2024 (particularly in South Australia), guest author Allan O’Neil takes a closer look at the operation of battery units in South Australia.
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.
Guest author, Allan O’Neil, takes us several steps further in understanding the events in Victoria on Tuesday 13th February 2024 – especially with respect to VRE (wind and solar) production.
Allan O’Neil provides a couple of initial observations regarding Dundonnell Wind Farm and Loy Yang A from his first glance of at the 4-second SCADA data from the events in Victoria on Tuesday afternoon.
Guest author, Allan O’Neil, adds some insights in a rapidly evolving situation on Tuesday afternoon 13th February 2024 in Victoria.
Inspired (or provoked) by Paul’s earlier article noting ‘NEM-wide demand has been quite low through summer 2023-24 (at least to date)’, guest author Allan O’Neil takes a look at how aggregate consumption stacks up for this summer, compared to prior.
Guest author Allan O’Neil continues our series of posts on very low system demand levels in South Australia and Victoria on New Year’s Eve, with a few unresolved questions remaining
Guest author, Allan O’Neil, takes a detailed look at how VIC1-NSW1 transfer capability has been limited frequently due to constraints related to the 051 line in southern NSW, and what it means in terms of inter-regional settlements residue accumulations, market efficiency overall, and the energy transition.
In his second article about the 2023 ESOO, guest author Allan O’Neil takes a look at what the AEMO has published with respect to various options for firming capacity to increase the reliability of aggregate supply to below the two thresholds (the Reliability Standard and the Interim Reliability Standard)
Last Thursday (31st Aug 2023) the AEMO published the ESOO 2023, including forecasts of some possibility of unserved energy in Victoria and South Australia this coming summer 2023-24 (above the Interim Reliability Measure). Guest author Allan O’Neil takes a look.
Guest author, Allan O’Neil, publishes some analysis for WattClarity on price and generation mix changes apparent in the NEM coincident with (but not wholly caused by) the closure of the last remaining units at Liddell Power Station.
Inspired by the recent article by Tristan Edis (who referenced the GSD2022 in analysis of curtailment of some wind and solar farms), Allan O’Neil follows on with more analysis of the two main types of curtailment. Allan differentiates these as ‘forced curtailment’ and ‘economic offloading’
During early morning Monday 1st May prices spiked in the NSW quite unexpectedly. Guest author Allan O’Neil takes us into the complexities of the EMMS and NEMDE to help us understand the mechanics of how this happened.
From 16th March 2023 the infamous ‘x5 constraint’ has been split into two. We quickly showed previously that the design of the Left Hand Side (LHS) does not vary. In today’s article, valued guest author Allan O’Neil takes a look at what is different.
Allan O’Neil digs through historic FCAS enablement and utilisation levels to examine whether there is an increasing trend in recent years.