Specifics of the frequency excursion (well outside the NOFB) on Thursday 6th November 2025
In the first hasty article about today's (Thu 6th Nov 2025) frequency spike, we see it quickly went past the NOFB. So, in this article, we look at how far ...
2025-11-06 suspect Data Glitch
Around lunchtime on Thursday 6th November 2025 it appears that AEMO suffered from some data glitch, which:
1) Created (the appearance of) a rapid ramp in ‘Market Demand’ in the Victorian region … but which was not there in reality
2) Ramping up units to meet this (phantom) increase in demand
3) Which overcooked the system frequency, driving it well beyond the NOFB.
In this category there is a series of articles that explore.
Was that a data glitch that saw lunchtime ‘Market Demand’ ramp in Victoria by 1,812MW?
Given the large ramp in frequency around midday Thu 6th Nov 2025, coincident with a large apparent ramp in 'Market Demand' in Victoria, we suspect a data glitch.
Major spike in mainland frequency, on Thursday 6th November 2025
A short note with this snapshot from our live frequency reading over the past hour showing a spike well outside of the Normal Operating Frequency Band on Thursday 6th November 2025