A short note with this snapshot of a 6-hour long frequency trace on Friday afternoon 31st October 2025, to capture what looks like another VRE-induced frequency wobble earlier this afternoon:
This looks to have occurred around 14:00 (NEM time) today.
Will look into this further at some future point in time.
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.
In this article we inspect power deviations from dispatched units that would have contributed to the frequency rise, and the deviations that would have contributed to the correction.
Understanding the FCAS response by all generators when a unit trips in the NEM. A detailed look at the Loy Yang A unit trip in December 2017 and the contribution of the Hornsdale Power Reserve.
Coincident with the walk home this afternoon/evening, the ‘Notifications’ widget in one of our display copies of ez2view alerted us to a large drop of ‘Market Demand’ in the NSW region … at a 937MW drop in the 5 minutes to 17:15 NEM time, so I have taken an initial look
1 Commenton "Frequency drop on Friday afternoon 31st October 2025"
VP6 back 15:30 31 Oct. Tell us what happened with Vales Point
I had done this post:
7/10/2022
Sale of Vales Point: How will Czech brown coal baron Pavel Tykac with
business registered in Liechtenstein impact on NSW coal and energy markets?
http://crudeoilpeak.info/sale-of-vales-point-how-will-czech-brown-coal-baron-pavel-tykac-with-business-registered-in-liechtenstein-impact-on-nsw-coal-and-energy-markets