Cumulative Price in VIC drops negative (but *not* the first time ever!) on Thursday 29th August 2024
On Thursday 29th August 2024 the Cumulative Price in Victoria dropped below $0/MWh … but Dan Lee noted not for the first time ever in any region.
negative prices
A bounce back: a review of Q2 2024 prices
We just witnessed another eventful Q2, with at least four drivers contributing to significant price volatility. This is our annual review of Q2 prices, where we compare these outcomes against the long-term trend.
Minimum Market Demand in NSW drops lower still, on Sunday 29th October 2023
As the SMS alerts continue, here’s an article to record the new low point for Market Demand in NSW on Sunday 29th October 2023.
Cumulative price in SA goes negative on October 26th 2023
In a rare occurrence (and perhaps a sign of the times), we noted that the cumulative price in SA turned negative yesterday afternoon.
Large Solar production in QLD on Saturday 16th October crushed between Rooftop PV and Coal
A short note at a ‘new normal’ condition that we can expect to see increasingly in NEM regions (including QLD) as rooftop PV continues to grow in scale.
‘Grid Demand’ in the NSW region plunges on Saturday 11th September 2021
[POSTED AT ~13:00] On Sat 11th Sept 2021, the ‘Grid Demand’ in the NSW region has dropped to levels not seen for many, many years … especially when considering it is in the middle of the day!
New low mark for production from brown coal on Saturday 28th August 2021
Following comments on social media over the weekend about a new low point for brown coal generation, I took a quick look.
A quick look at the generator bids across Sunday 23rd August 2021 (when Solar temporarily eclipsed Coal)
Prompted by reports elsewhere of solar PV production eclipsing coal-fired production on Sunday for a period of time, I had a quick look (including at aggregate bid volumes).
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’!
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.
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.
Using the GSD2020 to explore operating patterns across generation types
With the release of the Generator Statistical Digest 2020, Marcelle Gannon takes a look at how it can be useful for identifying and exploring different patterns of generation.
Making demand response work with negative prices
A recent development over in the WEM (paying energy users to consume, when there’s too much solar and wind) highlights the lack of foresight in the NEM … where we’ve implemented a significant reform (yet to start) that will do nothing to address negative prices.
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 look at what happened at most of the QLD generators through this 10:00 trading period.
Rooftop PV drives daytime Scheduled Demand even lower than the low point a month ago … lowest level in 16 years on Sunday 27th September 2020
A month on from the prior low point seen for Scheduled Demand (and Operational Demand) across Queensland in the middle of the day, the low point mark is driven lower still on Sunday 27th September 2020.
Exploring deeper (part 1), about minimum demand on Saturday 29th August 2020
Out of curiosity, and driven by questions received from several people, I’ve invested a bit of time today to delve further into the record low level of Scheduled Demand seen in the Victorian region (and perhaps also across the whole of the NEM) on Saturday 29th August 2020.
Case Study of 02:35 on Saturday 15th September 2018 (aggregate Raw Off-Target +355MW for Semi-Scheduled units)
This is the 11th Case Study in a series (looking at extreme outcomes of Aggregate Raw Off-Target for Semi-Sched units). We’ve rolled into 2018, now and (coincidence?) this one is much more complex than the first 10 from the earlier years …
Case Study of 03:25 on Tuesday 5th April 2016 (aggregate Raw Off-Target +359MW for Semi-Scheduled units)
After publishing three Case Studies on Saturday, this 4th Case Study in a long series is much more complex – with 8 different Semi-Scheduled Wind Farm units across VIC and SA exhibiting significant deviations from Target. This Case study looks at April 2016, which is also 3 years after the first 3 case studies.
Semi-scheduled generation–what are the real issues?
Marcelle digs into the data to find out what the real issues are in the AER’s proposed rule change for semi-scheduled generators.
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