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Author Topic: Lowest ever gas gen level on the Grid?  (Read 194 times)
dan_b
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« on: August 18, 2019, 10:56:05 PM »

Just popped on to Grid energy numbers - as you do on a Sunday evening whilst waiting for your PC to do some updates - noticed a fair few impressive numbers, which got me thinking...

This evening (11pm on Sunday),
Total demand - 25.4GW  (pretty low)
Wind - 11.3GW (pretty darned high)
Nuke 5.8GW  (climbing back slowly after a period)
Coal - big fat zero (yay!)

Hydro (0.5GW) , Drax Biomass (1.6GW - they do burn a lot of trees don't they?)  and interconnectors (2.4GW overall) for a total of - 4.4GW

Which leaves Gas at a really very low indeed 3.9GW.

So what's the lowest ever Gas generation we've had on the Grid? Both in terms of actual minimum GW output, but also in terms of overall % of generation?
This seems pretty darned low to me? 
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« Reply #1 on: August 19, 2019, 01:08:26 AM »

So what's the lowest ever Gas generation we've had on the Grid? Both in terms of actual minimum GW output, but also in terms of overall % of generation?

On the afternoon of 26 May this year, gas hit 2.9 GW in period 31 (15.00-15.30), at a time when total supply was around 29.2GW . At the time, wind was 11.1GW. nuclear 6.2 GW, imports 3.2GW, PV 3.8GW, biomass 2GW, coal 0. That's probably the lowest - I'll check again tomorrow.

Gas has been lower in absolute terms, and lower as a proportion of overall demand, but that was back when coal dominated; and I figured that was you were getting at, was the lowest fossil-fuel generation on the Grid.
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oliver90owner
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« Reply #2 on: August 19, 2019, 07:58:34 AM »

Saturday afternoon, with heaps of solar, looks even lower on Gridwatch?
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« Reply #3 on: August 19, 2019, 09:19:45 AM »

Saturday afternoon, with heaps of solar, looks even lower on Gridwatch?

Ooh, hang on, let me download the latest data ...

... and 3 ... 2 ... 1 ... I'm back in the room ...

Yes, that's right. Lower in absolute terms, and as a % of total supply. Period 31 (15.00-15.30) again; 2.6 GW gas, 28.4 GW total supply, 11.4 GW wind, 6.2 GW PV, 5.8 GW nuclear, 0.9 GW biomass, net 0.9 GW imports
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dan_b
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« Reply #4 on: August 19, 2019, 09:45:14 AM »

I seem to remember that National Grid has published its strategy for having zero carbon generation periods on the Grid by 2025.  With numbers like 3GW of gas creeping in now in 2019, then if Nuke gets back up to the 8GW region where it's meant to be and we keep plopping offshore turbines in the sea at the same rate, plus another 3 or 4 HVDCs scheduled to come online that seems both completely feasible and also probably conservative as an achievable target?
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« Reply #5 on: August 19, 2019, 10:17:12 AM »

According to the Gridwatch data, Gas (on a zero coal day) was lower last year overnight on 26th / 27th Aug 2018 at around 2.4GW.

But that was overnight on Sun / Monday of the late Aug bank holiday so especially low demand and nearly 2GW more nuclear last year, so last Saturday at 2.6GW was impressive enough.






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