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.
One of the many data sets being crunched as part of our analytical efforts underpinning the development of ‘GenInsights21’ is system frequency. In this short article today, we share some initial observations on how it has been changing.
In the final part of this series, David Scott asks whether MPFR and FPP-Reg-FCAS Recovery have delivered on their goals, then uses the data to explore how AEMO might procure Regulation FCAS more dynamically and tune AGC to make better use of it.
References to WattClarity in today’s session of the Senate Committee on Energy Planning and Regulation in Australia (between Matt Canavan and Daniel Westerman) spiked our interest – and, given the topic was NSW unit outages on Wednesday 27th November 2024, we took a quick look.
Yesterday, amongst the volatility, we also wrote about a ‘Small (NEM Mainland) frequency wobble, on Thursday afternoon 7th November 2024’. As a stepping stone to further analysis, we extracted data from around that time and present the two charts.
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