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From: Martin Brown <'''newspam'''@nonad.co.uk>
Newsgroups: sci.electronics.design
Subject: Re: 1GW (sic) Battery Energy Storage Systems
Date: Sat, 30 Nov 2024 17:40:25 +0000
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On 30/11/2024 15:53, john larkin wrote:
> On Sat, 30 Nov 2024 12:37:55 +0100, Jeroen Belleman
> <jeroen@nospam.please> wrote:
> 
>> On 11/30/24 11:50, Martin Brown wrote:
>>>
>>> SO that makes me wonder how big is a 1GW transformer operating at 400kV?
>>> And how much does one cost?
>>
>> There are plenty of images and descriptions of 400kV transformers
>> on the web. You have to be an insider to get a fair idea of the
>> cost. These things are usually made to order. I'd guess a 1GVA
>> 400kV transformer to be between 6 and 7 M$. I'm not an insider
>> though.
>>
>> Jeroen Belleman
> 
> https://www.dropbox.com/scl/fi/fte4dwtoui96xgeyn9f0h/XfmrScatter.JPG?rlkey=8uh77rliholy3iyd9y8lnvdwc&raw=1
> 
> I should add dollars.

Thanks John, but that looks a bit pessimistic.

If I read it right that's 200lb=0.1T for 1kVA so 10^5T for a 1GVA unit.

My current best guess from 4.5T for 1MVA and so  4500T for 1GVA (plus a 
bit extra supporting structure to deal with the extra weight).


-- 
Martin Brown