Frequency drop with trip of Callide C3 on Friday 4th April 2025
A quick record of unit trip at CPP3, and associated frequency drop, on Friday 4th April 2025.
Market Operations
Frequency excursion on Monday 31st March 2025
A very short article to note an apparent mainland frequency excursion (just prior to 17:00 NEM time on Monday 31st March 2025).
News articles (in the Australian) about losses at Zen Energy during Wind Drought
On Monday 24th March 2024 Colin Packham published two articles about Zen Energy and the Wind Drought of 2024 Q2, and Zen Energy published a response. Here's a record for east of future reference.
How did Cyclone Alfred impact electricity demand?
By day-end on the Friday the 7th demand levels were down more than 40% in the Gold Coast. Other areas were also impacted.
Back to forecast LOR2 for NSW for this evening (Sunday 16th March 2025)
A quick note showing the re-emergence of forecast LOR2 with a climbing forecast for evening demand in NSW.
Evening volatility in NSW on Saturday 15th March 2025
A very short article with this snapshot from NEMwatch at 18:20 (NEM time) on Saturday 15th March 2025 to mark evening volatility in NSW
About the ‘S-HUBG’ and ‘S-HUWT’ constraint sets, and yesterday’s network outage on Yorke Peninsula
With ElectraNet's unplanned network outage on Fri 14th March 2025, a quick look at the ‘S-HUBG’ and 'S-HUWT' constraint sets
ElectraNet experienced multiple faults on the transmission network Friday 14th March 2025 impacting power supply to the Yorke Peninsula.
Early on Friday morning 14th March 2025, ElectraNet experienced an unplanned network outage - including the Hummocks - Bungama 132 kV line, and Hummocks - Waterloo 132 kV line. Here's a first look.
Sunday 16th March could be a stinker in NSW … including with sporadic forecasts of LOR2
An article on DTN (formerly Weatherzone) prompts a look at forecasts for NSW this Sunday 16th March 2025
Down to ~17,000 customers off supply in south-east Queensland (not forgetting northern NSW)
It’s Friday morning 14th March 2025 and a quick review at the Energex Outage finder shows that we’re down to ‘only’ ~17,000 customers off supply
Burst of volatility in NSW and QLD (and Actual LOR1) on Thursday 13th March 2025
A short note with a snapshot from NEMwatch at 17:40 (NEM time) on Thursday 13th March 2025 to mark some volatility.
‘Market Demand’ in TAS drops by 151MW on Wednesday 12th March 2025
A quick article to record this large drop in 'Market Demand' in TAS, notified to us by the ‘Notifications’ widget in ez2view at 12:00 (NEM time) on Wednesday 12th March 2025.
AWEFS and ASEFS dispatch availability forecast outage on 11 March, 2025
AWEFS and ASEFS dispatch availability forecast systems experienced what looks to be an outage and we uncover how the 'SCADA' origin filled the gap.
Gremlins in AEMO systems publish rogue APC alert for South Australia, Sunday 9th March 2025
Which much attention focused on Queensland (in the wash out that has been TC Albert) a rogue Administered Pricing Notice (MN125439) for South Australia was a head scratcher, on Sunday 9th March 2025.
ex-TC Alfred makes landfall overnight, many more unplanned network outages result
It’s Sunday morning 9th March 2025 and a reference to the Energex Outage Map shows many more orange splotches denoting unplanned outages (by virtue of ex-TC Alfred).
What other details are visible, of those network trips in northern NSW yesterday (Fri 7th March 2025)?
Taking another look (on Saturday afternoon 8th March 2025) at what we can see of those network elements in northern NSW that tripped on Friday morning 7th March ... possibly related (or possibly unrelated)...
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.
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...