AEMO publishes Final Report on 24th January 2021 (total loss of SCADA systems)
A short back-dated article, to link in AEMO's final report on this incident.
Market Operations
What happened at each of the DUIDs impacted by the ‘Q>>NIL_CLWU_RGLC’ constraint equation on Sunday 24th January 2021 (Part 5)
It's now seven months since the SCADA outage on Sunday 24th January 2021 - and we're finally able to complete and publish this (quite long) article exploring some of the implications for units on the LHS of the ‘Q>>NIL_CLWU_RGLC’ constraint equation
Do you know what’s causing some increased latency on P5MIN data files on MarketNet in recent weeks (Potential Tripwire #4)?
Re-posted with update: In recent weeks we have noticed a trend towards increased latency in the creation of the ‘PUBLIC_P5MIN_*.csv’ files published by AEMO on MarketNet, and we wonder if you can help us understand why this is happening?
Plenty of things went wrong in Queensland last Tuesday, but some very important things went right
Whilst there were many things that went wrong on Tuesday 25th May 2021 (last week), guest author Allan O'Neil highlights that there were at least 4 things that went right - contributing to a much less severe outcome than would otherwise have been the case.
Callide C Catastrophic Failure
Carl Daley from EnergyByte, provides more insight into the events of last Tuesday, which culminated in widespread blackouts throughout Queensland.
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 for one find it easier to start understanding events like this...
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 mention detailed investigations).
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: ——————————————————————- MARKET NOTICE ——————————————————————- From : AEMO To : NEMITWEB1 Creation...
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 the price spike on Sunday 24th January 2021.
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 Failure, which contributed to the price spike that occurred in QLD...
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...
Sunday 24th Jan 2021 – a couple discrete incidents
It was forecast it would be a hot day in the southern part of the NEM and it did not disappoint. The hot weather was one of the factors that contributed to price spikes ... in Regulation FCAS, and then in QLD and later in...
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 look at the constraint set ‘Q-BCNE_821’ invoked to deal with the...
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 battery during this period of market volatility.