Frequency spike in PJM (Wednesday 22nd July 2026) with sudden ~3,000MW demand drop
At 07:56:24 local time on Wednesday 22nd July 2026 in PJM, the frequency spiked to ~60.1Hz in response to a ~3,000MW sudden drop in demand.
transmission outage
At 16:03 there was an unplanned outage of Dederang – Murray No 67 330kV line
Looks like bushfires might have had a role in tripping Dederang - Murray No 67 330kV line.
Lower 1-second FCAS volatility continues in SA on Sunday 27th July 2025
A brief article to note the continued impact of the Tailem Bend to Tungkillo line outage on FCAS prices.
Release of Report into Broken Hill blackout in October 2024
On Thursday 5th June 2025, the NSW Government released its 158-page report into ‘The electricity outages affecting Far West NSW in October 2024’.
Mainland system frequency on April 10, 2025, associated with VIC transmission outage
High speed frequency measurements provide a deeper understanding of how the system responded to the unplanned 500kV line outage.
Update from the NSW government (on Sat 19th Oct 2024), on power supply restoration in in western NSW
Via an update on LinkedIn from NSW Energy Minister, we’ve become aware of this update on the NSW Government website ‘Update on NSW Government response to power outage in Far West NSW’.
ElectraNet provide update that 29 transmission structures went down in SA, during last night’s weather event
ElectraNet are reporting that at least twenty-three transmission towers and six 132kV stobie poles fell down or were damaged during last night's wild weather.
How is the stockpile of temporary transmission towers around Australia looking?
Given recent events, we're asking a rhetorical question about how many temporary transmission towers there are currently in Australia?
Destructive Winds disrupt (and damage) transmission network in South Australia on Thursday (evening) 17th October 2024
On Thursday evening 17th October 2024, a significant weather event in South Australia has damaged the high-voltage network in SA Far North (and power supply has been impacted).
Seven transmission towers collapse near Broken Hill overnight
ABC Broken Hill has reported that seven transmission towers collapsed south of the town overnight due to strong winds and hail.
AEMO directs load shedding (following unplanned network outages) in NSW on Monday evening 8th July 2024
A short (perhaps initial) record of load shedding instructed for NSW on Monday evening 8th July 2024.
Victoria’s Department of Energy reports *six* transmission towers down in Victoria
The Department of Energy* in Victoria confirms that six towers have been downed, on Tuesday 13th February 2024
Rumours of transmission towers on the ground in Victoria (Tue 13th Feb 2024) … but *not* yet confirmed?!
At 15:06 AEMO reported *rumours* of transmission towers on the ground in Victoria. Constraint Set data at 15:45 suggests these rumours are not (yet?) confirmed.
Brief period of ‘Actual LOR2’ in the SA region Friday evening 27th October 2023 with low wind and constrained imports
A quick review of a short period of 'Actual LOR2' in the South Australian region on Friday evening 27th October 2023.
Brief loss of load around Townsville in the early hours of Saturday morning 21st October 2023
A quick initial article on Saturday morning 21st Oct 2023 about a significant loss of load in the Townsville area early this morning following a trip of some transmission elements.
The 2023 ESOO report clarifies why the transmission model only includes ‘System Normal’ – and why it’s a simplification
One observation about the 2023 ESOO is that AEMO is has highlighted the set of constraints modelled is only 'System Normal'.
ElectraNet tweets about tower damage near Tailem Bend (out for a week)
Second article in a growing series about the islanding of South Australia from Saturday 12th November 2022.
AEMO releases preliminary report into Tasmanian event on Friday 14th October 2022 (i.e. Article 5 in our series)
On Friday 28th October, the AEMO released its preliminary report into the storm damage to Liapootah – Palmerston 220 kV lines (loss of more than 500MW of load, and trip of Basslink and multiple generators)
Several different timeframes for investigating the major Tasmanian system event beginning Friday 14th October 2022
Third article on what happened on Friday 14th October 2022 - sharing a photograph of the damaged transmission (thanks to TasNetworks for the photo, and Zeus for the weather) and outlining a number of different timescales that could be considered with respect to this event.
Sequence of events in Tasmania on Friday 14th October 2022 (initial look)
On Friday 14th October we saw a significant system event in Tasmania - with storms downing power links, leading to large (530MW) loss of load and trip of Basslink. In this article we take a first look at the sequence of events...