An initial look at the Spot Price spike in NSW at 17:55 on Friday 10th October 2025
There was a short-lived (but interesting) price spike for ENERGY in the NSW region on Friday evening 10th October 2025. Here's a first look.
Case Study
Opaque Congestion and Hidden Curtailment … such as on Tue 24th June 2024 with the ‘N-DPWG_63_X5’ constraint set invoked
It was now just over 5 years ago when Marcelle wrote ‘Not as simple as it appears – estimating curtailment of renewable generation’. This week's invocation of the 'N-DPWG_63_X5' constraint set provides a great...
Five (re)bids for URANQ12 on on Tuesday 13th May 2025 – Part 3 of a Case Study
On Tuesday 13th May 2025 we quickly noted a period of volatility that was mainly focused on the NSW region. Here's a third step in understanding contributing factors...
A quick walk through a few volatile evening periods
In this article we take an initial look at bidding across some instances of price volatility from Monday 7th April 2025 to Friday 11th April 2025.
The effect of the ‘S_PPT+SNPT+BLVR_220’ Constraint Equation on Monday 23rd September 2024 (Part 4 of a Case Study)
In Part 4 of this Case Study (with respect to spot price volatility in South Australia on Monday 23rd September 2024) we take a detailed look at the 'S_PPT+SNPT+BLVR_220' Constraint Equation, which was particularly...
Taking a look inside South Australia’s lengthy run of volatility on Monday 23rd September 2024 (Part 2 of a Case Study)
There was an ‘Evening blast of spot price volatility in South Australia on Monday 23rd September 2024’ ... roughly 6 weeks ago. Today, for several reasons, we start to take a closer look.
What happened with System Load in VIC on Friday 27th and Saturday 28th September 2024?
With AEMO forecasting possible 'Minimum System Load' in Victoria for the coming weekend, we take a look back at (our understanding of) some of what happened on Saturday 27th Sept and Sunday 28th Sept...
Delivering oscillations, whilst seeking to minimise oscillations? A Case Study (Part 1?) of Darlington Point Solar Farm on Thursday 29th August 2024
A case study, drawing heavily on various widgets in ez2view, looking at some large (and unexpected) oscillations in output at Darlington Point Solar Farm through a ~2 hour period on Thursday 29th August 2024.
Which Solar Farm DUIDs were curtailed at 12:35 on Sunday 1st September 2024?
On Sunday 1st Sept 2024, aggregate curtailment of Solar Resource from (Semi-Scheduled) Large Solar across the NEM reached 79.2% ... in this follow-on article we explore the question 'WHICH Solar Farms were curtailed ......
How predictable is the wind (a short Case Study of Thursday evening 30th May 2024)?
An (initial and) short review of the solid block of high aggregate wind yield over the ~3 day date range (late Tuesday 28th May 2024 to late Friday 31st May 2024) ... and how...
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...
Brief Case Study of Sunday 4th February 2024, with low IRPM following high Market Demand
A quick look at the low point for NEM-wide IRPM on Sunday evening 4th February 2024.
Brief Case Study of low aggregate VRE (Wind + Large Solar) on Saturday 13th April 2024 … Part 1?
Taking a quick look at the dispatch interval through this period of low aggregate wind harvest that also saw lowest aggregate VRE (Wind + Large Solar).
Case Study of inertia supplied by source in the NSW grid on Tuesday 14th November 2023
With GenInsights Quarterly Update for 2023 Q4 completed, and some time till the end of 2024 Q1, we've looked back at Tuesday 14th November 2023 (when AEMO had concerns about low System Strength in...
A focused look at operations at Victoria Big Battery (VBB) on Tuesday 13th February 2024
In this article we circle back to Tuesday 13th February 2024 to tick off a few more of the long list of questions about the 'Major Power System Event' - in this article with...
Case Study of Friday 8th Dec 2023 (big gyrations in Aggregate Scheduled Target)
A short article looking at Friday 8th December 2023 looking at NEM-wide Aggregate Scheduled Target on the day.
Sky-high IRPM in the middle of the day, Sunday 1st October 2023
A short note (in conjunction with some analysis for GenInsights Quarterly Updates for 2023 Q4) about the high level of IRPM seen on Sunday 1st October 2023.
An initial exploration of QLD’s spike at 14:30 on Thursday 21st December 2023
An initial look at the 'out of the blue' price spike in QLD at 14:30 on Thursday 21st December 2023.
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...
What’s happening around Wagga?
Guest author, Allan O'Neil, takes a detailed look at how VIC1-NSW1 transfer capability has been limited frequently due to constraints related to the 051 line in southern NSW, and what it means in terms...