I was keen to see if there was any noticeable blip in System Frequency resulting from the unit coming offline on Saturday 4th October 2025, so quickly extracted a 3-hour run of data from one of our higher speed (i.e. at 0.1 second cadence) monitors in Brisbane:
It’s difficult to see any downwards blip at all, in the 5-minutes prior to 08:06 yesterday morning … and that’s a good thing!
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.
Guest author (and power system control specialist), Kate Summers, looks at what’s changed since she published a paper on frequency control in the NEM back in January 2017.
Another ‘interesting’ event today … a dip in mainland frequency with trip of Loy Yang A2.
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