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From: liz@poppyrecords.invalid.invalid (Liz Tuddenham)
Newsgroups: sci.electronics.design
Subject: Re: 1GW (sic) Battery Energy Storage Systems
Date: Sat, 30 Nov 2024 13:17:42 +0000
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Martin Brown <'''newspam'''@nonad.co.uk> wrote:

[..]
> 
> 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)?

[...]

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


-- 
~ Liz Tuddenham ~
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www.poppyrecords.co.uk