Differing return to service expectations for YWPS3 and YWPS4, following simultaneous trips
Following the simultaneous trips (on Thu 16th Oct 2025) of YWPS3 and YWPS4, we take a look at current return to service expectations.
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System frequency during simultaneous trips at YWPS3 and YWPS4 on Thursday 16th October 2025
System frequency remained within the NOFB, appears well managed given the supply loss approached 600 MW.
After Yallourn units trip, AEMO again issues directions to Jeeralang Power Station, for System Strength in Victoria
Following the simultaneous trip of units at Yallourn, directions to Jeeralang Power Station were issued for maintaining System Strength in Victoria.
Simultaneous trips at YWPS3 and YWPS4 on Thursday 16th October 2025
A short note on Thursday 16th October 2025 to record both Yallourn Units 3 &4 tripping during the 13:35 dispatch interval (NEM time) today.
AEMC communicates two items, relating to a Review of the Integrated System Plan (ISP)
Amongst the many emails that hit my inbox recently was an email from the AEMC that spoke to the ‘Package of ISP reform underway’ – and specifically these...
Bruce Mountain (at NEMdev 2025) spoke to his significant concerns about the ISP
A short note to follow the NEMdev 2025 conference (Tue 7th and Wed 8th Oct 2025) and to highlight a comment made by Bruce Mountain about the ISP.
Sarah Lawley (at NEMdev 2025) spoke about what she sees as ‘circular reasoning’ in the ISP
A short note to follow the NEMdev 2025 conference (Tue 7th and Wed 8th Oct 2025) and to highlight a comment made by Sarah Lawley about the ISP.
Some suggestions for the Nelson Review panel to consider (with respect to Forecasting) following review of the Draft Report
Following my presentation at NEMdev 2025 (on 8th Oct 2025), here are some suggestions that the Nelson Review panel might consider - with respect to forecasting.
Short-notice outage at Loy Yang A4 in Victoria on Wednesday 15th October 2025
At 09:06 (NEM time) this ‘Notifications’ widget alert from ez2view flags Loy Yang A4 coming offline ... which helps explain the directions for System Strength.
Scarce use of aggregate dispatch conformance to-date
No Mixed aggregate dispatch groups have been registered.
AEMO notes ‘Non-credible contingency event’ at Jeeralang
No sooner had we noted that ‘AEMO changes mind, and directs Murray instead (to run as syncon) for System Strength in Victoria on Wednesday 15th October 2025’ then we...
AEMO changes mind, and directs Murray instead … but this was also short-lived?!
Less than an hour after directing Jeeralang (for System Strength in Victoria), AEMO changes its mind and directs Murray instead. Though this was also short-lived!
AEMO issues directions to units at Jeeralang Power Station, for System Strength in Victoria (Wednesday 15th October 2025)
As AEMO had telegraphed yesterday, just after 08:00 (NEM time) on Wednesday 15th October 2025, the AEMO issued Directions to various units at EnergyAustralia’s Jeeralang Power Station for...
Are CIS-ters doin’ it for themselves? Part 4: Policy lessons highlighted by the Nelson Review
In the final part of our four-part CIS series, we zoom out to examine what government-backed Contract-for-Difference schemes are really achieving — drawing on policy lessons from the...
AEMO flags possible intervention tomorrow (Wed 15th Oct 2025) for System Strength in Victoria
Worth noting two market notices today flagging possible intervention because of System Strength issues in Victoria tomorrow (Wednesday 15th October 2025).
Small spike in Mainland Frequency, with (apparent) ~400MW trip of demand in Queensland on Tuesday morning 14th October 2025
It appears that there was some large(ish) trip in demand somewhere on the Queensland network, given the spike in frequency at ~07:28 on Tuesday 14th October 2025.
Drop in ‘Market Demand’ in QLD on Tuesday morning 14th October 2025
A short note to record a large-size drop in ‘Market Demand’ in the Queensland region on Tuesday morning 14th October 2025, as captured in this ez2view ‘Notification’ widget...
ER03 makes its way back online, Sunday evening 12th October 2025
Given that we’ve written about that outage several times before, worth noting that Eraring Unit 3 came back online Sunday evening 12th October 2025.
An initial look at the Spot Price spike in NSW at 17:55 on Friday 10th October 2025
There was a short-lived (but interesting) price spike for ENERGY in the NSW region on Friday evening 10th October 2025. Here's a first look.
Two bouts of >2 hours of Non-Conformance at Aldoga Solar Farm on Sunday 12th October 2025
A quick initial look at two lengthy periods of Non-Conformance at Aldoga Solar Farm on Sunday 12th October, with the first period seeing large negative Dispatch Error, and...