Re: Grand Apagon - Electricity (not) in Spain

On Mon, 5 May 2025 23:31:47 +0200, "Carlos E.R."
<robin_listas@es.invalid> wrote:
 

On 2025-05-05 15:58, john larkin wrote:

On Mon, 5 May 2025 13:45:24 +0200, "Carlos E.R."
<robin_listas@es.invalid> wrote:
>

On 2025-05-05 04:50, Don Y wrote:

On 5/4/2025 1:55 PM, Carlos E.R. wrote:

On 2025-05-04 22:20, Don Y wrote:

On 5/4/2025 5:34 AM, Carlos E.R. wrote:

They have it because they need them more. They run isolated, they
can not rely on others to smooth their loads. As a result, some
islands have successfully run for days on solar/wind only.

>
Is this just "taken in stride"?  Or, are residents alerted to special
"please be extra conservative in your energy use TODAY" requests?
>
How does storage capacity correlate with "off hours" demand?

>
They take it on stride.
I don't live there, nor have visited. I think that the island that
stayed for a month on solar/wind doesn't have heavy industries, not by
far.

>
So, they did nothing "special" to avoid running out of power for that
time?  I.e., they were CONFIDENT in their available surplus (day
AND night) to stick with "life as usual"?

>
Well, they had their diesel generators on standby. They did not have to
be confident, they simply were not needed for many days.
>
<https://www.endesa.com/es/la-cara-e/energias-renovables/gorona-viento-renovable>
>
You can read it with an automated translator.
>
The island is small.
>
<https://maps.app.goo.gl/p5FfPnhvFVKhRN4C8>
>
<https://en.wikipedia.org/wiki/El_Hierro>

>
I'm thinking that it doesn't snow there very much. A few days without
power won't kill many people.
>
Wind and solar, with 100% diesel backup, probably makes sense for
them. Diesel is expensive.

>
It doesn't ever snow, look at the map.
>
The diesel has been there since ever, it is not the backup. It is the
main system, but they are very glad to avoid using it now, thanks to
wind and solar.

 Back in the days of analog telephones over copper wires, the US
telephone system central offices had lead-acid battery power
sufficient for 48 hours full operation, plus a diesel backup
generator.  This allowed the diesel to be brought online only as
needed, and slowly if repair is needed.
 The objective was 0.99999 operational availability, which was usually
achieved in practice.

 Cell phone systems are happy to achieve 0.90000; maybe we can get them
to 0.99.
 Joe