Kogan Creek trips (on Tuesday morning 11th November 2025) … and ironically helps frequency
Three quick notes, after seeing the trip of Kogan Creek on Tuesday morning 11th November 2025.
Eventful days in 2025
A catalogue of articles pertaining to eventful days in 2025
Has it happened again … have gremlins invaded NEMDE and triggered a frequency excursion (Tuesday 11th November 2025)?
In what seems to be a repeat of what happened last week Thursday 6th November 2025, some strange (and large) changes in 'Market Demand in Victoria appear to have driven a frequency excursion on...
Angela’s article in AFR answers some of our "What’s up with Waratah BESS?" question
On Friday afternoon we asked the question ‘What’s up with Waratah BESS (unplanned outage till 3rd May 2026)?’. It was great to see (on Monday evening) Angela MacDonald-Smith answer some of these questions in...
Sunday evening trip at Callide C4, and wobbles coming back online
Taking a quick look - after our ez2view ‘Notification’ widget triggered an alert for what appears to be Callide C4 tripping from close to full load (Sunday 9th November 2025 at 21:26 NEM time)
A quick look at (plant-related) rebids for Waratah BESS from 19th October to 8th November 2025 (with PASA Avail 350MW)
Another in the series about Waratah BESS, we have a look at the unit's bids and operations over a 20-day time-range to midnight ending Saturday 8th November 2025.
A quick look at (plant-related) rebids for Waratah BESS to 19th October 2025 (during Hold Point 5 testing for full discharge)
In the next in the series about Waratah BESS, we have a look at a 9-day time-range to midnight ending Saturday 18th October 2025 via the ‘Bids & Offers’ widget in ez2view.
Belatedly noting that the AER published its PASA Compliance Bulletin and Checklist (back on Friday 29th August 2025)
Relevant to today's questions, we belatedly note now that it was back on Friday 29th August 2025 that the AER published its PASA Compliance Bulletin and Checklist.
An updated longer term trend (and tabulation) of operations at Waratah BESS
Almost exactly 3 months ago we posted a ~12 month chronological record of the history of Waratah BESS. Due to observations today (and questions and conversations leading from them) it was worthwhile to update...
Some sizeable cycles in ‘Market Demand’ in South Australia on Thursday 6th November 2025
It’s probably worth (also) recording an event that happened later in the afternoon on Thursday 6th November 2025 - some sizeable cycles in Market Demand in South Australia
What’s up with Waratah BESS (unplanned outage till 3rd May 2026)?
Today we see that, for the WTAHB1 unit in the MT PASA DUID Availability data set, there's now an unplanned outage for Waratah BESS extending well off the page.
Mainland Frequency wanders south early Friday afternoon 7th November 2025
A quick snapshot at 13:56 (NEM time) on Friday 7th November 2025 of our live updating frequency monitor, with frequency having wandered south:.
(First ever?) forecast MSL warnings issued for South Australia for the coming week
Adding to the distractions, more alerts from ez2view have drawn our attention to a series of Market Notices warning of forecast Minimum System Load (a.k.a. MSL) conditions for South Australia in the coming days.
A quick look at ‘Dispatch Error’ on Thursday 6th November 2025, in conjunction with the Frequency Spike
Today, we have the advantage of ‘next day public’ data, so are able to peel some more layers of the onion (in this article 'Dispatch Error') - with respect to the significant Frequency Spike...
A quick look at some of the market dynamics around the NEM during this afternoon’s frequency episode
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...
Specifics of the frequency excursion (well outside the NOFB) on Thursday 6th November 2025
In the first hasty article about today's (Thu 6th Nov 2025) frequency spike, we see it quickly went past the NOFB. So, in this article, we look at how far ...
‘Market Demand’ in South Australia drops by 216MW (or 21%) on Thursday afternoon 6th November 2025
Worth recording this other ez2view ‘Notification’ widget alert received at 14:11 (NEM time) on Thursday 6th November 2025 to mark a large-size drop in ‘Market Demand’ in South Australia.
Was that a data glitch that saw lunchtime ‘Market Demand’ ramp in Victoria by 1,812MW?
Given the large ramp in frequency around midday Thu 6th Nov 2025, coincident with a large apparent ramp in 'Market Demand' in Victoria, we suspect a data glitch.
Major spike in mainland frequency, on Thursday 6th November 2025
A short note with this snapshot from our live frequency reading over the past hour showing a spike well outside of the Normal Operating Frequency Band on Thursday 6th November 2025
Spot price volatility in South Australia on Wednesday evening 5th November 2025
A very short article with a snapshot from NEMwatch at 19:30 on Wednesday evening 5th November 2025 to mark some evening volatility.
Volatility in FCAS (Regulation and Contingency) prices in Tasmania on Wednesday 5th November 2025
A quick record of some volatility today in Regulation (and Contingency) FCAS prices in Tasmania on Wednesday 5th November 2025.