Trended NEM-wide % VRE over 12 days in June 2024
A short article in conjunction with GenInsights Quarterly Updates for 2024 Q2, trending NEM-wide % VRE over 12 days in June 2024.
Variable Renewable Energy (VRE)
Highest-ever wind yield … *and* worst wind yield since June 2017!
… it does not seem logical that both can be true, but (from our look at the numbers) it does appear to be!
Aggregate Dispatch Error across all Semi-Scheduled units (NEM-wide) throughout Thursday 22nd February 2024
Finding some time to make some progress in compiling GenInsights Quarterly Updates for 2024 Q1, here’s a short Case Study of Thursday 22nd February 2024 (a day that saw significant collective under-performance of Semi-Scheduled units with respect to their Targets).
Regulation FCAS Costs in 2023
Following a presentation with the CEC, Linton shared some insights into FCAS Regulation costs for wind and solar units over last calendar year.
Keeping Up with the Curtailment Part 2: The what and the where
Dan Lee takes a deeper dive into network and economic curtailment, and shares some charts and data maps that demonstrate seasonal effects, and the geographic spread of units affected.
Presentation for the Clean Energy Council about VRE performance and firming
This afternoon, Linton and Dan spoke to an audience organised by the Clean Energy Council about VRE and firming – with some snippets to be posted on WattClarity in coming days.
Victorian renewable generation on 13 February 2024: One picture and a thousand (sorry, many more) words
Guest author, Allan O’Neil, takes us several steps further in understanding the events in Victoria on Tuesday 13th February 2024 – especially with respect to VRE (wind and solar) production.
Case Study (Part 2) of Low % VRE NEM-wide on 3rd and 4th July 2023
The second part of an ongoing case study examining two successive days of low VRE generation in early July 2023. This part examines IRPM, earlier forecasts of available generation and maps the availability by site location.
Rooftop Solar is crushing* the returns for Large-Scale VRE
Following the release of GenInsights Quarterly Updates for 2023 Q3 we’ve chosen to share here one of the clear challenges for large-scale VRE that is emerging (particularly in 2023 Q3) due to the rise and rise of rooftop PV.
Case Study (part 1) of low % VRE NEM-wide on 3rd and 4th July 2023
A brief article as a first Case Study looking at Mon 3rd and Tue 4th July 2023, in conjunction with the compilation of GenInsights Quarterly Updates for 2023 Q3.
Research Paper into solar resource intermittency in future (in a climate changed world)
A quick article on WattClarity pointing to some research completed by Shukla Poddar and others about what future solar profile might be across Australia, in a climate changed world.
Renewable curtailment – forced and not quite so forced
Inspired by the recent article by Tristan Edis (who referenced the GSD2022 in analysis of curtailment of some wind and solar farms), Allan O’Neil follows on with more analysis of the two main types of curtailment. Allan differentiates these as ‘forced curtailment’ and ‘economic offloading’
Some revelations in GenInsights Q4 2022 about Aggregate Raw Off-Target for Semi-Scheduled units
In today’s article (a third snippet from GenInsights Quarterly Update for Q4 2022) we take a look at levels of large ‘Aggregate Raw Off-Target’ (i.e. large collective deviations away from Target), which continue to grow for the Semi-Scheduled category and remind us of that question …
The NEMs frequency behaviour – how is it going?
Following recent online discussions, Bruce Miller has produced this in-depth analysis of frequency behavior in th NEM.
Has adding wind and solar upped the need for FCAS in the NEM?
Allan O’Neil digs through historic FCAS enablement and utilisation levels to examine whether there is an increasing trend in recent years.
AEMO also released ‘Initial Roadmap’ on NEM Engineering Framework this week
A short note about the release, earlier this week, by the AEMO of the ‘Initial Roadmap’ in the NEM Engineering Framework.
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 MW or so) but the lights…
Does the NEM need to be redesigned?
Guest author Stephen Wilson chaired an ‘ESIG Down Under’ conference webinar on ‘Designing the Energy Markets of the Future’. Whilst introducing the session, Stephen presented a diagram that helped to clarify the combination of different time horizons that need to be considered in holistically describing ‘the Market’. It will be of interest to WattClarity readers.
Seasonality and deep storage in a highly decarbonized NEM
David Leitch of ITK Services examines the seasonal effects of Variable Renewable Energy (VRE) and some underlying challenges in this energy transition [this article is based on presentation at ‘Smart Energy Virtual’ on Wed 9th Sept 2020]