Re: The Spanish Grid Drop-out - recently released information.

Don Y <blockedofcourse@foo.invalid> 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?
 

No need for internet connectivity means no problems with network delays,
only the speed of RF from one end of the country to the other.  You would of

 
The actual path -- and the "terrain" over which it travels -- will determine
the propagation delay.
 
How does the system react to a (inevitable) loss of that control signal?
 
Inertia implies memory.  Memory can be implemented in silicon -- with
whatever dynamic characteristics the modelers choose.
 
But, if you treat new cogeneration facilities as "optional bolt-on products",
you likely won't model the NEW system with them in place.  Rather, you will
design them to disconnect from the OLD (existing) system if they "feel"
they can't cope with their current observations of that system's behavior.
 

course have multiple transmitter sites - they would cost in terms of power
to run, but compared with grid power it's tiny.  (before anyone says you
cannae get the transmitters any more, yes you can - Nautel will sell you
a new one)
 
Or is the problem that we actually do need slight desynchronisation - some
parts of the network become overloaded and need to 'slow down' compared with
other parts? (and they do that by phase differences rather than voltage
sag)  In which case the frequency differences follow the network topology
and the power flows.
 
Theo

 
 

Yes, in essence voltage and frequency are all that must to be monitored. I
think the unfortunate thing is to date most co-generation has been designed
to follow the grid but now their share is greater their algorithms need to
be updated to more closely participate in contributing to the grid rather
than passively following?

--
piglet