Still watching the market (in between other preparations) we noted this emailed alert from the ez2view ‘Notifications’ widget noting a trip of BW03 unit immediately prior to the 16:10 dispatch interval (NEM time) on Wednesday 5th March 2025:
No time to look further, but here’s a quick snapshot of live NEM mainland frequency (measured at 100 milli-seconds, though this chart truncates a bit):
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.
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 ‘old style’ frequency disruption.
Friday 31st January 2025 (appeared to) experienced a very large drop in demand in NSW in a single dispatch interval – but we’re now suspecting some form of data/operational glitch. However we wonder, if there was ~1,000MW more energy injected into the grid than required over a sustained period, what stopped the frequency flying through the roof?
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.
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