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Author Topic: Lowest demand?  (Read 1153 times)
dan_b
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« on: April 12, 2020, 01:53:52 AM »

In modern times whatís the lowest demand on the U.K. Grid?

Donít ask why Iím awake at 2am but just now demand is showing below 20GW.  That seems particularly low, is this a record?  Obviously Coronavirus has completely changed everything and itís also getting warmer.  I see nuke is creeping back up too...
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brackwell
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« Reply #1 on: April 12, 2020, 07:57:08 AM »

The Nat Grid always predicts the summer min at around 18GW https://www.nationalgrideso.com/research-publications/summer-outlook.   They also produce a series of kind of " how well did we do" which give the actual figs but i cannot find it.  From memory only i think the min was 16.7 GW

What is/has changing of course is the peak.
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brackwell
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« Reply #2 on: April 12, 2020, 08:39:46 AM »

Found this.  "In July 2018, we saw the lowest transmission system demand  (TSD) on record at 16.3 GW  (actual demand based on actual weather including station load). This continued the downward trend in demand that we have seen on the transmission system since 2011, which has largely been due to an increase in distribution connected generation."
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brackwell
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« Reply #3 on: April 12, 2020, 09:10:50 AM »

In fact Nat Grid had the lowest of 18.64GW at 05.00 1/2hr period so possibly even went a little lower.   I cant imagine what it would have gone down to if there had been a strong wind.

Predicting 16.2 GW 05.00 tomorrow!
« Last Edit: April 12, 2020, 09:13:10 AM by brackwell » Logged
azps
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« Reply #4 on: April 12, 2020, 09:46:07 AM »

In modern times whatís the lowest demand on the U.K. Grid?

Donít ask why Iím awake at 2am but just now demand is showing below 20GW.  That seems particularly low, is this a record?  Obviously Coronavirus has completely changed everything and itís also getting warmer.  I see nuke is creeping back up too...

There are several different amounts of demand recorded at any one time. The one my site shows includes embedded demand, and has been down to 19.4 GW (21 July 2019).

The one that gets the headline is the consumption that the transmission system sees (Transmission System Demand, TSD), which gets reduced by PV and embedded wind, and so is lower. That's been down to 18.1 GW (27 May 2019, 2.30-3am).

Then there's the TSD that is reported in arrears for billing settlement, the I014_TSD, which has been down to a whisker under 17 GW, same period as TSD.

And there's National Demand (ND) which has been down below 16 GW (29 July 2018 5-6am).
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Countrypaul
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« Reply #5 on: April 12, 2020, 11:06:18 AM »

The one that gets the headline is the consumption that the transmission system sees (Transmission System Demand, TSD), which gets reduced by PV and embedded wind, and so is lower. That's been down to 18.1 GW (27 May 2019, 2.30-3am).

Any idea how much of that was embedded solar?  hysteria
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dan_b
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« Reply #6 on: April 12, 2020, 12:53:43 PM »

It's interesting because there are 3x nuclear generators scheduled to come back online about now, so another 1.5-2GW of "baseline nuke" to be added to the mix (unless coronavirus stops them being brought back?) - and with the wind forecast to pick up strongly again, we might see these very low demand periods see basically zero gas?
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« Reply #7 on: April 12, 2020, 03:52:09 PM »

The one that gets the headline is the consumption that the transmission system sees (Transmission System Demand, TSD), which gets reduced by PV and embedded wind, and so is lower. That's been down to 18.1 GW (27 May 2019, 2.30-3am).

Any idea how much of that was embedded solar?  hysteria

Never heard of moonshine?

And it must be pretty bright, because just like the sun, if you focus on it for too long, you can go blind.   whistlie
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