Weird and wacky (erroneous?) transmission transfer limits for VIC1-NSW1 and Basslink on Tuesday 13th February 2024
A short article to record a question from a client that we did not have time to investigate further today.
Market Operations
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
Unit Trip at Callide B1 on Tuesday 13th February 2024
In amongst the frenetic challenges in Victoria today, the Callide B1 unit (in QLD) tripped … probably unrelated to the VIC activity.
Towers down near Geelong on 13th February 2024
A photo of downed transmission towers near Geelong, reported in ABC News’ blog, was observed on 13 February 2024.
Chronology of (300MW) load shedding in Victoria on Tuesday 13th February 2024
A chronological record of the (directed) load shedding in Victoria on Tuesday afternoon 13th February 2024
More network tripping on Tue 13th Feb 2024 – at Hazelwood terminal station
At 16:13:14 the AEMO published Market Notice 114643 about Hazelwood transformers
Loy Yang A2 unit the first (of four) units coming back online
About 3 hours after it tripped offline (due to transmission outage?) the Loy Yang A2 unit is making its way back online.
Network trips and loss of load in Tasmania as well!
it’s not just Victoria experiencing issues … Market Notice 114642 published at 16:14 highlights issues in Tasmania
Powercor distribution network *does* have distribution lines affected
A tweet from Powercor shows distribution lines down, on Tue 13th Feb 2024 … no doubt also elsewhere as well.
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.
Grid Inertia in the Victorian Region drops with the coincident tripping of 4 x Loy Yang A units
With a trip of four large synchronous units in Victoria (all supplying large amounts of inertia) it’s no surprise to see that inertia levels fell significantly this afternoon in Victoria.
Grid frequency on 13th February 2024
Grid frequency had dropped to 49.689 Hz. We take an initial look into the timeseries of grid frequency recorded on the day.
Load Shedding Direction in the Vic Region
At 14:35:00 the AEMO issued Market Notice 114607 requiring Load Shedding in the Victorian region:
AEMO to commence RERT negotiations in VIC
AEMO to commence RERT negotiations in Victoria.
Victorian power system event 13 Feb 2024 13:08 – a few quick notes
Guest author, Allan O’Neil, adds some insights in a rapidly evolving situation on Tuesday afternoon 13th February 2024 in Victoria.
Supply to lost load appears restored in Victoria … but Loy Yang A will take longer
A snapshot from NEMwatch at the 14:15 dispatch interval highlights 4 things on a challenging Tuesday 13th February 2024
Storm from passing Moorabool at time of transmission line trip – on Tuesday 13th February 2024
Third short article about Tuesday 13th February 2024 that copies in a snapshot of the BOM Radar Loop for Melbourne approx 11 minutes after the trip of the Moorabool Sydenham No1 and No2 500 kV lines
Mainland System Frequency drops through the floor with ‘Significant Power System Event’ on Tue 13th Feb 2024
Second quick article about 13th February 2024 … with mainland power system frequency dropping through the floor in this ‘Significant power system event’ in Victoria.
4 Loy Yang A units simultaneously trip, on Tuesday 13th February 2024
An unfolding story, on Tuesday afternoon 13th Feb 2024 – with all 4 x Loy Yang A units tripping.
Brief details of low % VRE on Thu 19th Oct 2023 (Case Study Part 1)
A short note (with GenInsights Quarterly Updates for 2023 Q4) about the low % VRE seen NEMwide on Thursday 19th October 2023.