Let’s talk about Inertia
Inertia is an important concept to understand as the technology mix in the NEM evolves during the energy transition. In this article, Jonathon Dyson talks about the importance of inertia and highlights an example...
Summer 2022-23 in the NEM
A collection of articles discussing events that occur (or are forecast to occur) through summer 2022-23 in the NEM
Case Study of Friday 20th January 2023 (Part 1) … large instance of collective over-performance for Semi-Scheduled units
Another short article today (also from GenInsights Quarterly Update for Q1 2023) presenting an overview of Aggregate Raw Off-Target (AggROT) for Semi-Scheduled units on Friday 20th January 2023.
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.
Recapping Thursday 23rd Feb 2023 (when hot weather drove demand in South Australia highest in 9 years)
On Thursday 23rd February, hot weather in SA drove 'Market Demand' to its highest level in just over 9 years, and delivered a bit of spot price volatility. We investigate....
Price volatility in VIC and SA on a warm summer evening, Thursday 16th February 2023
A quick post about some evening volatility in VIC and SA
QLD Market Demand reaches 9,512MW on a hot Sunday afternoon–12th February 2023
A quick look at how Market Demand peaked on a hot Sunday afternoon/evening in QLD.
RERT cost estimates released for 3 February 2023
Estimated RERT costs published, pushing past the market price cap for dispatched volumes.
Spot volatility, and an Actual LOR1, in South Australia on Thursday 9th February 2023
Prices have subsided somewhat at the time of publication, but here's a record of some volatility earlier this evening in South Australia.
Weather! The cause of.. and solution to.. all the electricity market’s problems?
Dan Lee tracks the demand forecasts against the actual outcome in QLD last Friday afternoon. The final result was as much as ∼1,000MW lower than the maximum forecast of demand published by the AEMO,...
Demand shortfall dodges need for large demand side contributions, QLD, 3 Feburary 2023
The forecast for Friday (3 February 2023) evening’s demand was that a new all-time maximum would occur and a lack of reserve was expected. To maintain the grid in a reliable operating state AEMO...
QLD Market Demand for 17:30 lands at ‘only’ 9750MW (Fri 3rd Feb 2023)
(Not even) close ... but no cigar. Actual level of Market Demand in QLD for 17:30 is about 10% below what the most extreme forecast thought it might be.
The worm has turned? Actual demand levels dropping lower than forecast (QLD 3rd Feb 2023) … maybe no record?
Today (Fri 3rd February 2023) is an illustration of the inherent difficulties in 'successfully' forecasting electricity demand!
Spot price volatility has begun (in QLD on Friday 3rd February 2023)
Second price spike in QLD today above $1,000/MWh ... with more to continue?
Wind not blowing in Queensland this afternoon as demand begins to rise
With demand beginning to rise sharply output at Queensland's four wind farms has been muted so far this afternoon.
Solar Production in QLD dropping faster than previously forecast (Friday 3rd February 2023)
The rain and cloud cover is delivering (amongst other things) a faster-than-expected drop in aggregate solar production in QLD.
RERT dispatched in QLD – at 17:30 on Friday 3rd February 2023
The RERT has been dispatched for 5:30PM this afternoon in Queensland
Availability at Tarong North Power Station almost halved as it nurses a tube leak
QLD may be down 200MW of available generation with record demand currently being forecast for late this afternoon.
Twelve hours of Mainland NEM System Frequency on Friday 3rd February 2023
Another article today presenting 12 hours of history of System Frequency (to ~14:00 on Friday 3rd February 2023) with a few questions added. Comments welcome!
Every extra little bit may help: 50MW temporarily added to QNI limit
An AEMO market notice from yesterday afternoon declares that an extra 50MW has been made available on the QNI interconnector.
AEMO contracts Reserve Trader (in QLD, on Fri 3rd Feb 2023), but trigger not yet pulled
AEMO starts the Reserve Trader process for the QLD region this evening (Fri 3rd Feb 2023).