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From: "Carlos E.R." <robin_listas@es.invalid>
Newsgroups: sci.electronics.design
Subject: Re: Grand Apagon - Electricity (not) in Spain
Date: Fri, 2 May 2025 23:24:58 +0200
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On 2025-05-02 12:17, Martin Brown wrote:
> On 01/05/2025 20:50, Carlos E.R. wrote:
>> On 2025-05-01 15:37, Bill Sloman wrote:
>>>
>>> You can feed in electrical energy from a battery quite a lot faster, 
>>> and get a correspondingly better result, if you've got the right 
>>> elaborate control algorithm.
>>
>> Wouldn't it be just easier to switch to DC?
> 
> Some of the newer interconnectors are DC and GW capacity (boggle).
> 
>> Or to at least switch to islands, interconnected by DC.
> 
> That was how they squared this circle in Japan where the NE are on UK 
> mains at 50Hz and the SE are on US mains at 60Hz. Not surprisingly all 
> Japanese kit will work quite happily at either frequency and their 
> exports will also work on a huge voltage range too.
> 
> There is quite an interesting magnetic deviation near big DC links.

I learned today that we can not isolate islands inside the country, 
because there are regions with a lot of demand and little generation, 
and other regions with a lot of generation and little demand. To do that 
would require separate transport.


> 
>> Probably not practical by now.
> 
> No it is perfectly possible. I'm not sure how they do it.
> 
> One of my mates worked on the civil engineering for the DC link in the 
> Irish Sea. This Ireland to UK is 500MW.
> 
> https://www.pv-magazine.com/2025/04/18/irish-uk-grids-linked-via-500-mw- 
> greenlink-interconnector-subsea-cables/
> 
> ISTR there is a N-S one in the Irish Sea rated at ~2GW and two more 
> planned for the North Sea although the pylon routing for them on land 
> has proved extremely controversial. Southern Nimby's want our northern 
> electricity but they don't want any pylons blighting *their* landscape.


Ah, yes, that happens.


-- 
Cheers, Carlos.