Aldoga Solar Farm on Sunday 12th October 2025 – Part 2
In this article we inspect power deviations from dispatched units that would have contributed to the frequency rise, and the deviations that would have contributed to the correction.
In this article we inspect power deviations from dispatched units that would have contributed to the frequency rise, and the deviations that would have contributed to the correction.
System frequency remained within the NOFB, appears well managed given the supply loss approached 600 MW.
No Mixed aggregate dispatch groups have been registered.
A zoomed-out view of six metrics supports understanding of physical/technical semi-scheduled generator availability.
We count the number of days each month when there was at least one 4-second measurement outside the NOFB.
How common is it that mainland frequency deviates outside the NOFB (normal operating frequency band)?
We follow on from A 292MW drop in "Market Demand" in Tasmania, on Saturday 16th August 2025 enlisting this "Part 2" to understand the sequence of events using 4-second data.
We assess whether the trip at Yallourn 2 on 26 August 2025 was large enough to drive a frequency disturbance.
It appears it was unit availability used to set the target for dispatch that went awry, rather than unit output.
Among other aspects, a large dip in solar UIGF aligns with the frequency deviation observed on 19th August 2025.
On Tuesday the 19th of August between 11:45 and 12:20 there was a significant frequency deviation on the mainland.
We use the elements available dataset to better understand turbines available at Bulgana in recent months.
Categories with a longer bar left of zero are losing more of their spot energy market revenue to regulation and PFR costs.
A brief note that AEMO's Quarterly Energy Dynamics for Q2 2025 is published.
A brief article to note the continued impact of the Tailem Bend to Tungkillo line outage on FCAS prices.
An agreement restraining how Basslink is bid into the energy market has ended, resulting in changes in bidding and energy flows.
An initial review of payment and cost outcomes of the first 44 days of financial operation of the FPP arrangements.
The incident description in the scheduling error declaration provides us with a glimpse into the underlying cause.
In July 2025 AEMO released the final report into the review of the major power system event of 13 February 2024.
Transgrid's Project Assessment Conclusions Report for System Strength assessed more than 100 individual solutions aimed at helping to meet its system strength obligations under the National Electricity Rules.