After a little over a week away, I’m striving to skim and scan many different data sources with respect to the ‘what did I miss?’ question – and the following late afternoon weakness in system frequency (on Sunday 30th November 2025) jumped out at me:
At some point in future we might be able to look into:
The extent to which under-performance of VRE was a factor:
Paul was one of the founders of Global-Roam in February 2000. He is currently the CEO of the company and the principal author of WattClarity. Writing for WattClarity has become a natural extension of his work in understanding the electricity market, enabling him to lead the team in developing better software for clients.
Before co-founding the company, Paul worked as a Mechanical Engineer for the Queensland Electricity Commission in the early 1990s. He also gained international experience in Japan, the United States, Canada, the UK, and Argentina as part of his ES Cornwall Memorial Scholarship.
Presenting this single image which summarises the sequence of events (for a number of Semi-Scheduled units) over three dispatch intervals across the pair of frequency spikes (on Fri 10th and Sat 11th April 2026).
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 much more ‘traditional’ drop in frequency on Friday morning 7th August 2026 (compared to the stranger-but-deeper drop on Wednesday 5th August 2026), with Friday’s following a coal unit trip
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