A very short article for Wednesday 6th November 2024, such that we might follow up later, to note the following two wobbles in frequency in the mainland NEM today …
Frequency wobble on Wednesday morning
Here’s one that is visible in the snapshot taken at 09:18 (NEM time) this morning, looking back a 1-hour window:
Deeper Frequency wobble on Wednesday afternoon
And here’s a snapshot taken at 16:02 (NEM time) this afternoon, looking back a 2 hour window and capturing a dip that occurred
Not quite (according to what’s visible in the chart) to the edges of the Normal Operating Frequency Band (NOFB).
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.
The NEM operates at a frequency of 50 hertz (Hz) which means the alternating current should cycle 50 times a second between positive and negative voltage.
The multi-region islanding event on Saturday 25th August was a very rare event – perhaps the only one’s that occurred in the history of the NEM. It has generated plenty of questions – and driven our analysis further. We share some more observations here, and keenly await the draft AEMO report.
Guest author, Allan O’Neil delves further into understanding what happened in response to the transmission tower failures on 31st January 2020 that sent system frequency in South Australia and led to a large reversal of flows.
1 Commenton "Mainland frequency wobbles, on Wednesday 6th November 2024"
Does a slight drop in frequency affect synchronise clocks and is the effect cumulative?