Actual MSL2 in South Australia (not the first time) on Sunday 7th December 2025
At 11:02 (NEM time) on Sunday 7th December 2025 the AEMO published MN131472 noting 'Actual MSL2' in South Australia
Market Operations
AEMO requests that Notice of Closure be extended to 5 years (in some cases)
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...
Worth noting the AEMO rule change request ‘Efficient and timely management of system security needs through the energy transition’
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’.
Increase in minimum LHS Factors in Constraint Equations gone live Tuesday 2nd December 2025
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).
‘Blackout bingo’ in the media again this week … this time with Victoria and Yallourn
Following media reporting from Monday about 'blackouts' and 'Eraring closure', today (Wednesday 3rd December) there's a media report about 'blackouts' and 'Yallourn closure'
Belatedly noting v2.0 of the ‘NEM Readiness Guide’ (and Checklist) by the AER, released on 29th August 2025
I was on a call earlier and someone helpfully circulated a link to the document ‘NEM Readiness Guide v2.0’, released by the AER on 29th August 2025 - so now noting here, for ease...
Release 1 of the ISF (Improving Security Frameworks) reform went live, on Tuesday 2nd December 2025
Noting that yesterday (Tuesday 2nd December 2025) saw a milestone reached, with ‘Go Live’ achieved for Release 1 of the Improving Security Frameworks (ISF) reforms.
AEMO declares Scheduling Error – related to the ‘Self-forecast vendor issue’ experienced on 19th August 2025
Last week (on Thursday 27th November) the AEMO made a Scheduling Error Declaration about the sizeable glitch in a particular self-forecast vendor that delivered phantom production on Tuesday 19th August 2025 and a large...
AEMO updated MT PASA guidance, on 2nd December 2025
At 13:55 on Tuesday 2nd December 2025, the AEMO published MN131337 as an update earlier MT PASA updates (continuing to forecast Low Reserve Condition for NSW for periods between August 2027 to November 2027).
How collective under-performance of Semi-Scheduled Solar Farms weakened frequency on Sunday afternoon 30th November 2025
We’ve already posted about how ‘Mainland Frequency dragged downwards around sunset, on Sunday 30th November 2025’. Here, we see how underperformance across Large Solar Farms was a major cause.
Mainland Frequency dragged downwards around sunset, on Sunday 30th November 2025
This late afternoon weakness in system frequency (on Sunday 30th November 2025) seems noteworthy.
AEMO releases ‘2025 Transition Plan for System Security’
On Monday 1st December 2025 (after it was flagged in some media articles) the AEMO released its 154-page '2025 Transition Plan for System Security'.
One example of why some batteries were charging during price spikes over the past couple of days in NSW
This article looks at the N::N_CNLT_2 transient stability constraint on Tuesday to give an example of why some NSW batteries ended up charging through Tuesday’s price spike.
A look at mainland grid frequency yesterday, November 26th, 2025
A quick look at the data from our frequency logger yesterday, showing the changes in frequency during the period of market volatility.
Unpacking some of the drivers of volatility in NSW today, on Wednesday 26th Nov 2025
Today in NSW we saw large price spreads, material network curtailment, wild swings in demand, and several other factors unfold. This article summarises some of the high-level drivers of today's events.
Daytime price volatility in NSW on November 26th, 2025
A quick snapshot of regional prices, where the spot price in NSW hit the MPC at 11:00am NEM time.
Record intra-day price spread as the NSW spot price goes near the market floor, after hitting the market cap on Tuesday 25th Nov 2025
So far today we've seen a $21,019.65/MWh intra-day price spread in NSW, underscoring just how far prices can swing in the NEM.
Price spikes up to the MPC in NSW, seemingly out of the blue, during the middle of Tuesday, 25th Nov 2025
A brief but unexpected spike to the market cap in NSW in middle of today has prompted a closer look at the rapid demand jump, counter-price flows and binding constraints that shaped the outcome.
Energex report nearly 100,000 customers still without power this morning in South-East Queensland after last night’s storms
A fast-moving thunderstorm system swept through Brisbane and surrounding regions on Monday afternoon, bringing destructive winds, giant hail and more than 800,000 lightning strikes.
Further thoughts (and questions) about Waratah BESS, two weeks after the snowball started to roll…
Identifying 5 distinct time periods (from 26th Sept 2025 to 21st Nov 2025) with Waratah BESS, we take ez2view and some external references to try to piece together sequence of events in 3 of...