How high did frequency get, on Tuesday 11th November 2025, when that gremlin re-appeared?
Extracted our high(er) speed readings highlights that the mainland frequency exceeded the NOFB for a period of the morning on Tuesday 11th November 2025.
2025-11-11 Suspect Data Glitch
Just after the working day started on Tuesday 11th November 2025 it appears that AEMO again suffered from some data glitch (similar to Thursday 6th November), in 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.
Trying to understand the errors in ‘Initial Supply’ (on Tue 11th and Thu 6th November) as the source of the gremlins
In this article we take another step in trying to understand the source of the gremlins (on Thu 6th Nov 2025 and Tue 11th Nov 2025) that seemed to infect the dispatch process -...
How often have we seen these gremlins, injecting ‘phantom’ demand and driving frequency high? … a 1st pass
Following two instances of apparent data glitches (injecting 'phantom demand' and) driving frequency high, here's a collation of some other times (we've written about) where similar has happened.
Kogan Creek trips (on Tuesday morning 11th November 2025) … and ironically helps frequency
Three quick notes, after seeing the trip of Kogan Creek on Tuesday morning 11th November 2025.
Has it happened again … have gremlins invaded NEMDE and triggered a frequency excursion (Tuesday 11th November 2025)?
In what seems to be a repeat of what happened last week Thursday 6th November 2025, some strange (and large) changes in 'Market Demand in Victoria appear to have driven a frequency excursion on...