Slightly more detail on System Frequency on Friday 14th October 2022 (Part 4)
Zooming into the ~7 minute period during which the initial event occurred in TAS on Friday 14th October 2022.
Tasmania
Several different timeframes for investigating the major Tasmanian system event beginning Friday 14th October 2022
Third article on what happened on Friday 14th October 2022 – sharing a photograph of the damaged transmission (thanks to TasNetworks for the photo, and Zeus for the weather) and outlining a number of different timescales that could be considered with respect to this event.
Sequence of events in Tasmania on Friday 14th October 2022 (initial look)
On Friday 14th October we saw a significant system event in Tasmania – with storms downing power links, leading to large (530MW) loss of load and trip of Basslink. In this article we take a first look at the sequence of events…
530MW loss of electrical load in Tasmania on Friday 14th October 2022
Some quick notes of a sizeable loss of load in Tasmania and a volatility situation that is ongoing as I hit ‘publish’ at 11:50 NEM time.
TAS spot price at $15,100/MWh with near-record Market Demand … and NEM-wide IRPM hits a low of 4.33% Tuesday morning
Second article this morning, highlighting the very tight supply-demand balance.
Bizarre pricing continues outside of the QLD region
At 22:40 the price exceeds $10,000/MWh in NSW, VIC and SA … with QLD under Administered Pricing.
After AP is imposed in QLD, volatility started elsewhere
Volatility has ramped up in NSW, VIC, SA and TAS (particularly SA) with QLD under Administered Pricing.
Severe weather in TAS causes disconnects customer load – and coincides with transmission line trips
Recap of some transmission trips overnight in TAS … coincident with severe weather.
Tasmania sees its own spell of volatility on Saturday evening 4th June 2022
A brief look at a period where the TAS region experienced prices up at $15,100/MWh Market Price Cap.
Tight supply-demand balance on Monday evening 30th May 2022 drives prices high and IRPM low
A very quick summary of market volatility touching all regions across Monday 30th May 2022 … but particularly in the evening.
Ten hours of prices above $100/MWh overnight, across *all* regions
I’m greeted this morning with a view of how prices have remained stubbornly elevated all the way through 10 hours overnight… in all regions!
AEMO releases preliminary report into TAS Market Suspension on 1st March 2022
A short note about the AEMO preliminary report, published 16th March 2022 – into the TAS market suspension on 1st March 2022.
Market suspended in Tasmania on March 1st 2022
This afternoon the AEMO alerted of a market suspension in the TAS region, which coincided with the failure of two undersea fibre cables that caused parts of the state to lose internet access.
Looking back at a Q2 2021 period that’s been anything but boring
Now making it 5 out of the past 6 years, we return to the analysis of electricity (spot and futures) pricing patterns for Q2 periods across the NEM regions … and also in Western Australia. We see a number of ways in which Q2 2021 was ‘anything but boring’!
The accelerating rise of Negative Prices in the NEM
A longer-term trend of the incidence of negative prices across each region of the NEM … and, most interestingly, the pattern by time of day.
Average spot prices through 2020 down at levels not seen for many years
Several conversations this week prompted me to update the long-term view of how spot prices have trended over time (in particular because average prices in 2020 were quite different than recent years).
It’s good news that time-weighted average prices for Q2 2020 are down on prior years – right?
Spurred by a number of concurrent requests I’ve returned to the pattern of prior analysis of Q2 prices (completed in 2016, 2017 and 2018) to look at what’s changed for Q2 2020 that’s just ended. Some stakeholders clearly taken by surprise. Analysis includes the SWIS in Western Australia
NEM Scheduled Demand tops 33,000MW and prices spike in the south on Tuesday 22nd January
Some snapshots from NEMwatch recording a day where NEM-wide demand breached 33,000MW and prices spiked above $1000/MWh in VIC and SA
First scorching summer day for the year and the sky rocketing price of electricity.
The first day of scorching summer temperatures for the year has been matched with elevated electricity prices in New South Wales, Victoria and South Australia for most of the day. Queensland and Tasmania experienced small patches of high prices yet…
Reviewing the pattern of spot prices for Q2 2018 suggests that we’re far from out of the woods, yet
Returning to the theme of analysis of Q2 prices (completed in 2017 and 2016 due to Q2 historically being an uneventful period) we see that prices have backed off from the “off the charts” level of 2017, but are still much higher in all regions than most other regions. In some cases results are second worst in 20 years.