Three Events Yesterday – with Mainland Frequency as low as 48.555Hz
Part 5 in an expanding series, looking at what happened in QLD on Tuesday 25th May 2021 - this one looking at system frequency.
Seasonal Record of Events in the Market
Collections of events that we see happening in the NEM, categorised in terms of the seasons in which they occur.
Callide C4 (tentatively) offline for a year – following turbine hall fire yesterday!
First update, day after the event, shows a cautious (initial) approach to returning the 4 units at the Callide site back to service.
A new all-time maximum for coincident wind production across the NEM late on Tuesday 25th May
Last night, in addition to the dramas unfolding in the QLD region, we set a new record for coincident NEM-wide wind production - eclipsing the prior record from exactly 6 weeks ago.
QLD dodged a bullet …. Tue 25th May 2021 (Part 3)?
Third short article this evening, after it looks like we've escaped from a tight supply/demand balance (reasonably) unscathed.
Hold onto your hats … QLD’s supply demand balance forecast to be very tight in the hours ahead … Tue 25th May 2021 (Part 2)
Looks set to be a very tight supply/demand balance this evening in Queensland. Here's hoping everything goes right for the AEMO Control Room!
Loss of ~2000MW of demand in Queensland on Tuesday 25th May
A quick snapshot from NEMwatch at 14:20 today highlighting the loss of approximately 2000MW of demand this afternoon – dropping the level of Scheduled Demand down to 3,775MW: The AEMO Market Notice highlighted says:...
Price volatility on Monday 17th May 2021 … as expected (part 1?)
Was speaking with someone this morning about the expectation that there would be price volatility this evening, and the market obliged. It’s only just started, but here’s the second spike (at 17:40) captured in...
Prices skyrocket across all 4 mainland regions on Wednesday 12th May
Spot prices spiked across mainland regions this evening - firstly at 17:55 (above $1,000/MWh). and then at 18:00 (up towards $15,000/MWh). Here's a first look.
Liddell unit 3 to close in 11 months time … on 1st April 2022?
Saw an update from the AER this evening pertaining to Liddell unit 3, and had a quick look with the power of the Generator Statistical Digest 2020.
Where’d the wind go, during the last week of April?
Over the week that has just passed we kept noticing production from wind farms across the NEM was fairly muted - so we've had a look at what it meant, in aggregate daily capacity...
Rainfall in northern Queensland contributes to price spike at 15:55 on Tuesday 20th April 2021
In between other jobs today, we've taken a look at why the price spiked yesterday (Tue 20th April) in QLD ... at an earlier time than we had become accustomed to seeing it occur...
How reversion to static line rating in the ‘Q>>NIL_CLWU_RGLC’ constraint equation contributed the price spike on Sunday 24th January 2021 (Part 4)
More time has elapsed since 'Part 3' on 24th March - today I'm posting a shorter piece (Part 4) that explains how RHS of the ‘Q>>NIL_CLWU_RGLC’ constraint equation drove down output and led to...
Cyclone in Western Australia douses solar production in South Australia on Tue 13th April 2021
Looking back at Tuesday 13th April 2021 - a day in which the ex-tropical cyclone Seroja in Western Australia caused some wobbles in rooftop solar PV output in South Australia.
New all-time record Wind Output across the NEM last night (5,430MW at 23:55 on Tuesday 13th April 2021)
David Osmond's question on Twitter prompted me to have a look at large wind production overnight.
A quick review of the price spike in QLD at 14:35 on Friday 9th April 2021
Reminded by today's spikes, here's a quick look at a similar price spike that occurred yesterday (14:35 on Friday 9th April 2021 in the QLD region).
Several QLD price spikes on Saturday 10th April 2021
Three price spikes in the QLD region on Saturday 10th April 2021 help to remind us that how increasingly dependent we are on various machinations of the weather (including, on these occasions, cloud cover...
Piecing together what happened on Sunday 24th January 2021 with the ‘Q>>NIL_CLWU_RGLC’ constraint equation (Part 3)
It's taken a while to find the time - but today I'm posting this next analytical piece (Part 3) that seeks to understand what happened on Sunday 24th January 2021 with the NEM-wide SCADA...
AEMO publishes Preliminary Incident Report about incident on Friday 12th March in South Australia
A short article this afternoon to link through to the Preliminary Report published by the AEMO, looking into what happened in South Australia last Friday (12th March 2021).
Down 55% – but not out
Over 2,000 MW – or around 55% – of South Australia’s firm supply capacity was unavailable last Friday evening (March 12, 2021), along with virtually all of its large-scale renewable supply (a further 1,800...
Preliminary information on loss of SCADA data – for Case Study 24th January 2021 in Queensland
Two months ago prices spiked in QLD on a Sunday afternoon when AEMO lost SCADA data feed. One month ago AEMO published a preliminary report. In the background we have been taking a look...