NEM demand tragic and occasional WattClarity guest author Allan O'Neil drills into an apparent discrepancy in AEMO's demand calculations following the 1 July 2026 transition of the Basslink interconnector from MNSP market participant to Regulated status.
A sudden drop in NSW demand was followed by apparent recovery in the next interval.
Guest author, Allan O'Neil, goes into some detail of exploring the various factors contributing to the price volatility in South Australia that bookended the night of Sunday 21th June into Monday 22nd June 2026.
The AER has determined the revenue that Basslink can recover for the Basslink transmission cable for the 2026-30 period, operating as a regulated service.
This afternoon we saw mainland frequency briefly step above its normal operating band for approximately 20 minutes — potentially the result of a data glitch. In this quick piece, we unpack some market dynamics while it unfolded.
An agreement restraining how Basslink is bid into the energy market has ended, resulting in changes in bidding and energy flows.
After rejecting an earlier proposal, the AER has today approved the conversion of Basslink into a regulated transmission service.
Dan looks at some recent and peculiar auto-clamping behaviour of interconnectors, and walks through the market arrangements causing these occurrences.
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.
We already noted this a few times recently, but we thought it would be worth separating out as its own article under the ‘Energy Literacy’ category, as it’s likely we’ll be referring back to it increasingly in future.
A timeline of evolving expectations for the cost, benefits, and delivery dates for Project Energy Connect - following news of recent issues surrounding the project.
Prices in SA have spiked to close to the market cap and remained elevated, following the invocation of the 'I-VS_250' constraint set due to extreme weather conditions.
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...
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.
Limits on interconnectors play a key role in setting regional prices in the NEM. Marcelle finds a number of traps when interpreting the market data.
A short note about an unexpected Basslink outage that began yesterday morning.
Over 2,000 MW – or around 55% – of South Australia’s firm supply capacity was unavailable last Friday evening (March 12, 2021), along with virtually all of its large-scale renewable supply (a further 1,800 MW or so) but the lights stayed on – just. The...
On 25th November, guest author Allan O'Neil examined the 'X5 Constraint'. Two weeks of operation have passed, so now Allan reviews some of what's happened.
Given the great interest in the new 'X5 constraint', guest author, Allan O'Neil, has invested some time to pick the new constraint equation to understand (and then explain) what it is, how likely it will be to bind, and who is likely to be affected.
Ben Skinner from the Australian Energy Council examines how transmission is currently funded in the NEM.