Oh, irony of ironies …

We’ve just noted ‘Has it happened again … have gremlins invaded NEMDE and triggered a frequency excursion (Tuesday 11th November 2025)?’ and, trawling through my inbox I see this other ‘Notification’ widget alert from ez2view, which:

1)  Was triggered at 09:06 (NEM time) … so:

(a)  one dispatch interval earlier than the 1,130MW drop in ‘Market Demand’ in Victoria;

(b)  but, more importantly, aligned with the similarly sized ramp up in ‘Market Demand’ in Victoria that preceded the drop

2)  And speaks to the trip of Kogan Creek unit,

… as seen here:

I thought I would take a quick look in more detail here via the ‘Bids & Offers’ widget from ez2view:

Three quick notes about this picture:

The earlier planned outage

We’d seen that the unit had come back online in the early hours of yesterday morning (Monday 10th November 2025).  This had followed a 10-day planned outage, that CS Energy had publicised such as here on LinkedIn as being ‘getting ready for summer’:

The trip today, and expected RTS

In the snapshot from the ‘Bids & Offers’ widget from ez2view, we see that the unit tripped this morning – but that the current expectation (via the PD/ST PASA data that’s been publicly accessible since late July 2025), the expected return to service is currently this evening.

Fingers crossed for that.

Whilst not desired, (in this case) also fortuitous

Finally, worth noting that:

1)  Whilst noone (including at CS Energy) would really be happy that the unit tripped (albeit accepting that ‘Power station ‘trips’ are normal, …’ as Hugh Saddler wrote some years ago),

2)  The timing of the trip has ended up being quite fortuitous – as it has delivered some much needed frequency relief in a grid that was quickly over-cooking and may well have flown out of the Normal Operating Frequency Band (NOFB) otherwise.