A very short article this evening with a single snapshot from NEMwatch v10.2 taken at 19:00, but with the 18:00 dispatch interval the point of interest:
The dispatch price spiked above $14,000/MWh in both QLD and NSW for the 18:00 dispatch interval (i.e. the last dispatch interval in the 18:00 thirty minute trading period). I’m inferring that the subsequent 300MW drop in dispatch target for Scheduled Demand in the QLD region was the result of ~300MW of (spot-exposed) Demand Response in the QLD region … the type which we’ve been serving for what’s approaching 20 years.
We’ll look forward to seeing how both factors evolve through October (whilst also staying clear of these three tripwires) with:
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.
Both the QNI and the Heywood interconnectors tripped around the same time on Saturday 25th August 2018 (not apparent at this time which one was first, and why), leading to both QLD and SA regions being separately islanded from the rest of the mainland NEM. This also contributed to over 1,000MW of load shedding in NSW and VIC, and presumably some frequency excursions in QLD and SA.
Back on 8th October, I spoke at All Energy in Melbourne on this topic. Given the questions posed after the session, it seemed that it might be of value to some WattClarity readers if I narrated over the top of the presentation and included it here, for future reference.
AEMO current forecasts (at early afternoon Wed 28th Feb) still show a tight supply-demand balance in NSW for Thu 29th Feb afternoon/evening, but not as severe.
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