“The energy price in New South Wales increased to the market cap price of $10,000/MWh at trading intervals (TIs) ending 13:00hrs, 13:30hrs and 15:00hrs on Friday 31 October 2008. The Queensland region saw energy prices rise to a maximum of $3,618.51/MWh at TI 14:30hrs. Mainland Frequency Control Ancillary Services (FCAS) prices reached $105.13/MWh at 14:50hrs. The Tasmanian region saw a negative energy price of -$0.43/MWh for the trading interval ending 15:30hrs. Energy prices in other regions were not materially affected.”
A Market Event Report has been published on the NEMMCO AEMO website at
NEMMCO says that a system incident report covering the reliability of the power system during this event will be published separately (and we’ll link to it, when we see it).
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.
Yesterday evening (Tue 9th June 2020) saw an example of ‘dunkelflaute’ across the NEM. It’s a phenomenon we will see increasingly as the transition progresses, so it’s something we should be seeking to understand, and address, with real world solutions and not rose coloured glasses.
A deeper look at the frequency data (our own, and also from some others) reveals a number of other interesting things about what happened on Tuesday 25th May 2021 in Queensland.
For only the 5th time in 11 years of NEM history (and the 3rd time for South Australia) four consecutive days of price spikes have forced the Cumulative Price to the Threshold, and AEMO has imposed price caps to prevent retailers from going bust.
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