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.
unit trip
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)
The return to service of Callide B2 and C4 in October 2025, following storm issues
Following this update on LinkedIn from CS Energy on Thursday 30th October 2025, we summarise outages at Callide B2 (two outages) and Callide C4 (one outage).
Loy Yang B1 returns to service after planned outage – not without a few wobbles (and frequency drop)
Loy Yang B1 has returned to service on Sunday morning 2nd November 2025 following a planned outage, not without some wobbles.
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.
Simultaneous trips at YWPS3 and YWPS4 on Thursday 16th October 2025
A short note on Thursday 16th October 2025 to record both Yallourn Units 3 &4 tripping during the 13:35 dispatch interval (NEM time) today.
Frequency drop on Thursday evening 11th Sept 2025 with Tallawarra B trip
A quick article to explore a frequency drop on Thursday evening 11th September 2025.
Mainland frequency drop with Loy Yang A1 trip on Saturday evening 30th August 2025
On Saturday evening 30th August 2025 there was a trip (and then subsequent recovery) of the Loy Yang A1 unit - we take a look at frequency change.
Frequency change with Yallourn unit 2 trip
We assess whether the trip at Yallourn 2 on 26 August 2025 was large enough to drive a frequency disturbance.
Frequency change associated with coal generation events
System frequency shows improved resilience to sudden coal generation events since 2020.
Loy Yang A2 apparent trip from 443MW on Wednesday 25th June 2025
A very short midday article on Wednesday 25th June 2025 noting this apparent trip of LYA2 unit from 443MW just prior to 11:31 (NEM time).
Sharp drop in frequency on Friday morning 13th June 2025, with trip at Newport Power Station
I’ve not yet had time to fully investigate, but thought it worth recording the sharp drop in frequency that appears to have occurred shortly after 07:30 NEM time on Friday 13th June 2025.
A quick look at system frequency, with 2 x coal units offline overnight into Saturday 31st May 2025
It’s fitting to book-end the week with a look at frequency performance overnight (into Saturday 31st May 2025) with two coal unit outages in NSW overnight to see what happened in terms of more...
Loy Yang A3 offline on Tuesday afternoon 20th May 2025 – small frequency drop
A short note because of a 295MW drop in output from Loy Yang A3 just prior to 14:06 (NEM time) on Tuesday 20th May 2025.
Drop in NEM Mainland Frequency appearing to coincide with trips at New England Solar Farm, on Saturday 19th April 2025
We take a quick look, after AEMO noted that at 13:51 (NEM time) the New England Solar Farm No.1 and No.2 both tripped.
Frequency drop with trip of Callide C3 on Friday 4th April 2025
A quick record of unit trip at CPP3, and associated frequency drop, on Friday 4th April 2025.
Afternoon trip of Bayswater unit 3 delivers rapid drop in Mainland Frequency
A quick record of a unit trip at Bayswater Power Station on Wednesday afternoon 5th March 2025.
Callide B2 (apparent) trip early on Wednesday morning 19th February 2025
Whilst looking at system frequency, there was an apparent trip of the Callide B2 unit in the early hours of Wednesday morning 19th February 2025.
Frequency drop coincident with trip of Callide C3 unit, on Wednesday morning 20th November 2024
A short note to flag the apparent trip of Callide C3 just prior to 06:35 (NEM time) on Wednesday 20th November 2024.
A quick look at Yallourn unit operations, on Tuesday 12th November 2024
Partly prompted by a comment yesterday from a WattClarity reader (Liam), and powered by 'next day public' data, we take a look at Yallourn Power Station on Tuesday 12th November 2024.