A catalogue of articles pertaining to eventful days in 2025
At the 05:50 dispatch interval NEM time on Thursday 18th December 2025, the AEMO is forecasting LOR3 (i.e. load shedding) for NSW this evening.
At Wednesday 17th December 2025, it’s approaching 4 weeks since Friday 21st November 2025 (when we last looked at Waratah BESS), so we take an updated look ...
At 10:24 (NEM time) on Wednesday 17th December 2025 the AEMO issued its latest ‘NEM Local Temperature Alerts’ Market Notice, and this one’s a long one that spans all four mainland regions in the days ahead.
Some first initial notes about the ‘N^^N_NIL_WGLT’ constraint equation ... which was earlier flagged as a 'N::N_NIL_WGLT' constraint equation (and has been referred to as ‘N>>N_NIL_WGLT’ constraint equation).
On Wednesday 17th December 2025, the AER announced here that it had ‘… instituted proceedings against Transgrid following 2024 Broken Hill outages’.
As another stocking stuffer for your holiday reading, today (Wednesday 17th December 2025) the CSIRO has released its draft of the next iteration of the much-awaited and often debated GenCost report.
At 16:16 (NEM time) on Wednesday 10th December 2025 there was an unplanned outage of Yass - Marulan 5 330kV line.
Whilst today saw the release of the draft 2026 ISP, some 'challenges of the future' are already here today - such as the increasingly large and common gyrations in 'Market Demand' seen in South Australia on Wednesday 10th December 2025.
We can see that the frequency weakened late in the afternoon (Wednesday 10th December 2025), falling down towards the Normal Operating Frequency Band.
We thought it might be useful to point directly to the 61-page report ‘Managing the Transition to Renewable Energy’ by the Victorian Auditor-General.
Today (Wednesday 10th December 2025) the AEMO has released the much-awaited* draft of the (upcoming 2026 iteration of the) Integrated System Plan .
Third article in the series, we take a look at the specifics of how much of Wellington North Solar Farm is back online (at Tuesday morning 9th December 2025).
There was some early morning price volatility in South Australia on Monday 8th December 2025 - a social media update from Michael Caravaggio from EPRI internationally prompts this article.
The Wellington North Solar Farm (which came offline Sunday 7th December 2025 due to grass fire) is back online.
Just after 13:00 (NEM time) on Saturday 6th December 2025, the Wellington North Solar Farm came offline following a grass fire onsite.
On Friday 5th December 2025 we also saw EnergyAustralia report to AEMO the 19-day extension to the lengthy unplanned outage at YWPS2 following 'LP turbine issues' experienced in August 2025.
At 11:02 (NEM time) on Sunday 7th December 2025 the AEMO published MN131472 noting 'Actual MSL2' in South Australia
Flagging (from the AEMO rule change request on 14th November 2025) the request to extend Notice of Closure to 5 years ... and to remind readers of thoughts already submitted to the Nelson Review panel about this.
Pre-dating AEMO’s Monday release of its 2025 TPSS, was AEMO’s Rule Change Request ‘Efficient and timely management of system security needs through the energy transition’.
It’s also worth explicitly calling out the increase in minimum LHS factors (from 0.07 to 0.15) that also went live yesterday (Tuesday 2nd December 2025).