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From: Bill Sloman <bill.sloman@ieee.org>
Newsgroups: sci.electronics.design
Subject: Re: Grand Apagon - Electricity (not) in Spain
Date: Fri, 2 May 2025 03:32:12 +1000
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On 2/05/2025 1:38 am, Joe Gwinn wrote:
> On Thu, 1 May 2025 10:27:36 +0100, Martin Brown
> <'''newspam'''@nonad.co.uk> wrote:
> 
>> On 30/04/2025 22:28, Joe Gwinn wrote:
>>> On Tue, 29 Apr 2025 23:33:17 +0200, "Carlos E.R."
>>> <robin_listas@es.invalid> wrote:
>>>
>>>> On 2025-04-29 14:24, Martin Brown wrote:

<snip>

> Big hunks of rotating metal are slide bolt simple and reliable.

And South Australia stopped replying on them for grid frequency 
stabilisation as soon their first grid battery - the first in the world 
- came on line.

https://hornsdalepowerreserve.com.au/

Big hunks of rotating metal are just stored energy - so are charged up 
batteries, and fast inverters let you correct the grid waveform faster, 
and more accurately.


>> I hadn't realised that the French government have deliberately limited
>> 400kV link capacity over the Pyrenees to protect EDF nuclear power from
>> cheaper competition from Spain's massive solar PV investment.
> 
> The US has its examples as well.
> 
> The need for spinning reserve in both directions may change their
> calculus.

There no need for any spinning reserve. Grid scale batteries can do that 
  job faster and cheaper.

-- 
Bill Sloman, Sydney