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From: Jeroen Belleman <jeroen@nospam.please>
Newsgroups: sci.electronics.design
Subject: Re: The Spanish Grid Drop-out - recently released information.
Date: Mon, 12 May 2025 23:25:12 +0200
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In-Reply-To: <vvtium$18vkn$1@dont-email.me>

On 5/12/25 21:42, Don Y wrote:
> On 5/12/2025 7:31 AM, Theo wrote:
>> A naive question: why do we need to get these signals from the grid at 
>> all?
>> Why can't we broadcast a synchronisation message on something like LW 
>> radio
>> that is picked up by every generator large or small?  Then the network
>> operator can monitor what's happening and adjust the signal as 
>> appropriate.
> 
> How have we managed to distribute electrical power over huge swaths of land
> from multiple independent operators WITHOUT such a mechanism?

I don't think that using broadcast radio for real time mains
grid control is a good idea. It would be far too unreliable.

To first order, power plants adjust the power injected into
the grid by observing the grid frequency. When the frequency
drops, the injected power is increased.

This says nothing about the dynamic behaviour, which is far
more involved, and variable too. Apparently there are some
issues with that on the European grid.

Jeroen Belleman

[Snip...]