Re: 1GW (sic) Battery Energy Storage Systems

On 30/11/2024 11:37, Jeroen Belleman 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.

In a quick Google search I wasn't able to find anything bigger than 500MVA at 400kV at least not domestically in the UK. Hence the question.
https://www.wilsonpowersolutions.co.uk/products/transformer-product-portfolio/power-transformers-up-to-500mva/
Any idea of the lead times for built to order, weight or dimensions would be very helpful.
I did also find these largest in Europe and UK BESS setups (real ones) as a result of your suggestion so thanks for that lead.
Any idea of how the scaling law for big EHT transformers runs in terms of power handling? eg how much cheaper is one for half the power?
I have to say that I was more impressed than I wanted to be with their sales pitch. The only thing badly wrong is the site access route. They were up to their eyeballs in expensive (but knowledgable consultants) - they must be burning money on this project hand over fist.
--
Martin Brown