Power Outages in Northern NSW and South-East Queensland at Saturday morning 8th March 2025
A Saturday morning update (8th March 2025) following the overnight advance of TC Alfred.
Market Operations
Yass to Wagga control scheme update removes some constraints
The notice informs us that an update to the Yass overload trip scheme means it is now managing flows on lines 990, 991 and 970 132kV in both directions.
Friday morning update from WeatherWatch, and TC Alfred
Because not all have access to Anthony Cornelius' updates on LinkedIn, but many are interested in TC Alfred, I have shared Anthony's update from Friday morning 7th March 2025 here.
More network trips in northern NSW, on Friday 7th March 2025 (is TC Alfred involved?)
The AEMO notes that, at 06:12 (NEM time) on Friday 7th March 2025 various 132kV lines between Lismore and Mullumbimby tripped, along with No 1 and 2 cables of Directlink. This follows localised distribution...
High level uncertainty about daytime QLD (and to a lesser extent NSW) ‘Market Demand’ with TC Alfred
AEMO is seeing considerable uncertainty in forecasting daytime 'Market Demand' for QLD (and NSW, to lesser extent) in the near term due to uncertainties in the approach of TC Alfred.
Afternoon trip of Bayswater unit 3 delivers rapid drop in Mainland Frequency
A quick record of a unit trip at Bayswater Power Station on Wednesday afternoon 5th March 2025.
Unplanned outage of No 1 leg of Directlink (was this related to the emergence of TC Alfred?)
AEMO says 'At 1030 hrs the Ewingsdale-Mullumbimby 9G5 132kV line and the Directlink DC1 tripped'. Was this related to TC Albert?
The curious case of the ‘Q^^TR_CLHA_-600’ constraint equation on Monday 3rd March 2025 (Part 1)
A first walk through the ‘Q^^TR_CLHA_-600’ constraint equation (at the 10:00 dispatch interval on Monday 3rd March 2025), before 'next day public' data is available.
‘Market Demand’ drops 401MW in 5 minutes on Sunday 2nd March 2025
All I have time to do now is note another change greater than 400MW in a 5-minute period – this time in in Victoria to the 11:10 dispatch interval (NEM time) on Sunday 2nd...
Curtailment at New England Solar Farm – Sat 22nd and Sun 23rd February 2025
A question from a client led me to take a (very quick) look at curtailment over the recent weekend (Saturday 22nd and Sunday 23rd February 2025) at New England Solar Farm 2 ... with...
Pronounced ramp in ‘Market Demand’, then subsidence, in South Australia on Saturday 22nd February 2025
Recording a ~500MW ramp and subsidence in ‘Market Demand’ in South Australia on Saturday 22nd February 2025 (including a drop of 229MW in 5 minutes).
A closer look at NEM Mainland Frequency (at 100ms cadence) on Thursday afternoon 13th February 2025 (i.e. Part 2)
Some recent questions prompted this more granular look at NEM Mainland Frequency on Thursday afternoon 13th February 2025
A curious case of UIGF for Hamilton Solar Farm on Wednesday 12th February 2025 (Part1)
Here's a first look at (generating lots of questions about) Hamilton Solar Farm, and particularly the Availability forecast, back on Wednesday 12th February 2025.
Large (+405MW) jump in ‘Market Demand’ in NSW on Thursday 20th February 2025
A second article for Thursday 20th February 2025 looking at a noticeable jump in 'Market Demand' in NSW
A curious case of some ‘rogue’ sky-high P5 price forecasts for NSW on Thursday 20th February 2025
A short (and perhaps cryptic, or perhaps useful) initial look at some (what might appear to some) 'rogue' price forecasts in P5 predispatch for the NSW region on Thursday 20th February 2025.
NEMDE nightmares – parallel pathways and clashing constraints
Prompted by a question by a client in a training session for a new ez2view user, guest author Allan O'Neil has written 2,940 words to explain the price outcome in one particular dispatch interval...
Second big drop in ‘Market Demand’ in NSW on Wednesday 19th February 2025
About 150 minutes after the earlier (apparent) drop in NSW 'Market Demand' there's a second drop that's not quite so big, but still sizeable.
Callide B2 (apparent) trip early on Wednesday morning 19th February 2025
Whilst looking at system frequency, there was an apparent trip of the Callide B2 unit in the early hours of Wednesday morning 19th February 2025.
741MW (apparent?) drop in ‘Market Demand’ in NSW on Wednesday midday 19th February 2025
That alert in ‘Notifications’ widget in ez2view (looking at large change in 'Market Demand' in NSW) has triggered again at 11:51 (NEM time) on Wednesday 19th February 2025.
Large instantaneous jump in ‘Market Demand’ in NSW on Tuesday afternoon 18th February 2025
A relatively large jump in 'Market Demand' in the NSW region from 16:05 to 16:10 on Tuesday 18th February 2025 caught our attention.