Callide C Catastrophic Failure
Carl Daley from EnergyByte, provides more insight into the events of last Tuesday, which culminated in widespread blackouts throughout Queensland.
Eventful Days
There were 3 events on Tue 25th May – and it seems likely that QNI separated briefly in Event 2
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.
ABC news report suggests Callide C4 will be offline for a long, long time
My evening reading of an ABC news article (about Callide C) released this afternoon suggests a long, long and expensive outage for Callide C4.
Sequence of Events on 25 May – A Very Short & Partial Visual Guide
Normally this would be part of a much more complete article adding to WattClarity’s growing coverage of the major power system events in Queensland following the incident at Callide C Power Station. However I...
Here’s 7 of the Headline Questions we’re pondering about, following the dramas in Central Queensland on Tuesday 25th May
Sharing 7 of the 'Headline Questions' we're pondering, as we bury ourselves in the data surrounding the events that happened on Tuesday 25th May ... some of which will have long-lasting implications (not to...
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.
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.
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:...
Case Study Part 5 – Why did those constraint bind – in QLD on Tuesday 13th October 2020?
In part 5 of this expanding Case Study of the unexpected price spike on Tuesday 13th Oct, linked to a large & sudden drop in output across 10 solar farms, we take a detailed...
Batteries vs. peaking plants – a case study from 13 October
UQ's Andrew Wilson pens a case study on the market events that occured on Tuesday the 13th of October in the QLD region, in which he examines the relative performance of UQ's 1.1MW behind-the-meter...
Case Study Part 4 – Who did What – in QLD on Tuesday 13th October 2020?
In part 4 of this expanding Case Study of the unexpected price spike on Tuesday 13th Oct, linked to a large & sudden drop in output across 10 solar farms, we take a quick...
Case Study Part 3 – digging still deeper, about what happened in QLD on Tuesday 13th October 2020
In part 3 of this expanding Case Study of the unexpected price spike on Tuesday 13th Oct, linked to a large & sudden drop in output across 10 solar farms, we dig deeper to...
Case Study Part 2 – did Rooftop PV kill Large Solar Farm output (and cause the price spike) in QLD on Tuesday 13th October 2020?
Based on some preliminary analysis of the Powerlink's 'Qdata' set (available in ez2view) we present our current hypothesis as to the sequence of the events yesterday in the QLD region, where 600MW of solar...
Case Study part 1 – Queensland price spikes to $15,000/MWh at 09:45 on Tuesday 13th October 2020 … coincident with many Large Solar Farms (tripping**)
Alerted to a price spike at 09:45 this morning in the QLD region, we discovered some reduction in load (spot-exposed Demand Response probably) and also a large collective trip in Solar Farm output (reasons...
Observing Easter Saturday, a little belatedly
Guest author, Allan O'Neil, invests some time to explore a number of different aspects of Easter Saturday (11th April 2020), each noteworthy in their own right (including low demand, high percentage share renewables, negative...
13 headline questions and observations following the long-term islanding, starting Friday 31st January 2020
In order to help us (internally) map out all the different threads to explore in terms of what happened on Friday 31st January 2020 on a remarkable day in the NEM, I've identified a...
Out of the blue, another LOR2 – NSW region on Saturday 1st February 2020
With the benefit of more data available today, can piece together why there was the sudden drop into LOR2 territory on Saturday 1st February 2020 (something that alarmed me, and resulted in AEMO directing...
Hot weather and high demand continues, with actual LOR1 in NSW region at 13:55 on Saturday 1st February 2020
I’ve snuck into the office on Saturday to start the process of piecing together some of of the different aspects of what happened yesterday to follow on from Friday evening’s short article (this will...