Direction for System Strength in NSW again–on Thursday 30th October 2025
In a repeat of yesterday, the AEMO has again directed for System Strength in NSW on Thursday 30th October 2025.
All Posts
Comparing AggROT for (44x) Coal Units with AggROT for Semi-Scheduled units through the history of the NEM
On Sunday (following from the discussion at the NEMdev conference in Brisbane a few weeks ago, and leading into this week’s All Energy 2025 in Melbourne) I highlighted these ‘Two *big concerns* that we...
Another direction for System Strength in NSW (on Wednesday 29th October 2025)
It's day 1 of All Energy 2025 today (Wednesday 29th October 2025) , and the day will have already started - but I thought it would be topical to note another direction for System...
Frequency drop with trip of Callide B2 on Tuesday evening 28th October 2025
A short note to capture the trip of Callide B2 on Tuesday 28th October 2025 in the five minute period prior to 21:01 (NEM time) that day.
Sharp mainland frequency drop, with trip of CPP_4 on Sunday evening 26th October 2025
The Callide C4 unit tripped from 420MW in the 5 minutes to 18:36 (NEM time) on Sunday evening 26th October 2025, delivering a sharp drop in mainland frequency.
Two *big concerns* that we urge the Nelson Review panel to (re)consider (with respect to Invisible Responses) following review of the Draft Report
With All Energy happening this week in Melbourne, plus the clock ticking down on preparations at the Nelson Review Panel for their final report, I've reached back to the NEMdev conference to write about...
Selected 4-second data relating to the (SemiSched-induced) frequency weakness on Thursday 16th October 2025 (i.e. Part 4)
In Part 4 of this evolving Case Study, we take a closer look (using 4-second data) at the 12 x offending Semi-Scheduled units that appear to have played a large role in driving frequency...
AEMO announces that it’s ‘progressing transitional system security services’
A quick note to point readers here to the AEMO news update ‘AEMO progressing transitional system security services’ published today (Friday 24th October 2025).
A hot afternoon in NSW on Wednesday 22nd October 2025 (but the price did not pop … at least to 14:15)
A short article looking at the NSW region in early afternoon Wednesday 22nd October 2025.
WeatherWatch notes ‘Cyclonic Conditions for Victoria, Widespread Gales Across NSW & Areas of South Australia’
A short note (on Wednesday morning 22nd October 2025) about the Severe Weather warnings (from WeatherWatch, and then from AEMO).
Guest Authored Posts
24 GW in 24 months, a race against time for the NEM
Following his presentation at All-Energy in Melbourne last week, David Dixon reports on the state of the NEM's ambition to reach 82% renewables by 2030.
The implications of the Solar Sharer Offer (SSO) and Default Market Offer (DMO) review outcome on energy sellers
In this guest-authored article, Connor James explains the upcoming changes to the DMO, including the much publicised Solar Sharer Offer (SSO), and potential implications for energy sellers in NSW, SEQ, and SA.
Detailed Analysis
Regulation FCAS Costs in 2023
Following a presentation with the CEC, Linton shared some insights into FCAS Regulation costs for wind and solar units over last calendar year.
Keeping up with the curtailment Part 2: The what and the where
Dan Lee takes a deeper dive into network and economic curtailment, and shares some charts and data maps that demonstrate seasonal effects, and the geographic spread of units affected.
A precis of the ‘Exploring Wind Diversity’ analysis completed in Appendix 27 of GenInsights21
Almost 2.5 years since we released GenInsights21, today we're publishing this article that contains a precis of the analysis included as Appendix 27 under the title 'Exploring Wind Diversity'.
How many Semi-Scheduled units were submitting Self-Forecasts through 2023 (and how many of these were actually used in dispatch)?
Our GSD2023 was released just over 4 weeks ago. This is the second sequential article utilising the GSD2023 Data Extract to take a look across all the Semi-Scheduled units (i.e. Wind and Solar). In...
Need for speed: How long has each battery project in the NEM taken to deliver?
Elon Musk's '100 days or it's free' offer was made almost exactly 7 years ago - how much longer or shorter have battery development delivery times changed since then?
State-of-charge: a peek into the economics and performances within the NEM’s battery fleet
A review of battery storage market performance in the NEM throughout 2023, a year in which where we saw the battery fleet double in size.
A quick first pass through ENERGY bids (for Victorian units) on Tuesday 13th Feb 2024
Five days after Tuesday 13th February 2024 we have a bit of time to take this initial (top-down) look at bidding for ENERGY in the Victorian region on that day ... with 27 Questions/Observations...
The Generator Statistical Digest 2023 (GSD2023) is released
It's Thursday 15th February 2024 and (in amongst the detailed analysis relating to Tue 13th Feb 2024 in Victoria) we're releasing the GSD2023 ... the Generator Statistical Digest for the 2023 calendar year.