Re: 1GW (sic) Battery Energy Storage Systems

On a sunny day (Sat, 30 Nov 2024 07:55:49 -0800) it happened john larkin
<JL@gct.com> wrote in <3admkj985o85b0s2pc2b61v8tp6vk5i9f8@4ax.com>:

On Sat, 30 Nov 2024 13:17:42 +0000, liz@poppyrecords.invalid.invalid
(Liz Tuddenham) wrote:
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Martin Brown <'''newspam'''@nonad.co.uk> wrote:
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[..]

 
It will have ~900 container modules of batteries as close together as
they dare (half the US regulation spacing) and in double lines of 50.
 
SO that makes me wonder how big is a 1GW transformer operating at 400kV?
And how much does one cost?
 
I'm guessing the secondary to handle 2500A will have to be (30A = 2mm^2
so 3000A ~ 200mm^2 = 16mm diameter) and at a 40:1 stepdown the low side
will have to be 40x bigger cross section 6x linear size hollow core?).
Are these guesses approximately right? How many turns on each?
 
How much soft iron core does it require (approximately)?

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[...]
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Have we got the industry that could make such a thing - or shall we be
buying it from China?

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Maybe switchmode would work, to scale down the 50/60 Hz magnetics.
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OK, my take:

400 kV DC for long distances
That avoids inductive losses

Cost:
1000 of common 400V car batteries in series
  https://www.alibaba.com/showroom/electric-car-battery-400v.html
That avoids switching losses.
You an get a good deal if ordering a lot I am sure.
Use 2 strings, while one is connected to the 400 kV line charge the other ones with common car chargers :)
one or more at the time, connect those to solar panels or windmils ... anything..
Use little robot cars to move those around one or more at he time, big remote controlled mechanical switches...
Here is you next week / month battery :-)

Usenet patent, if you do it that way you have to pay me a pure chocolate bar, mind you cacao is
getting more expensive every day, so hurry!

The other advantage of 400 kV DC over long distances is that you can have more battery groups spread
and connected in parallel equalizing each other's charge.
No sync problems.

Just a mass product,.
Keep It Simple