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From: Don Y <blockedofcourse@foo.invalid>
Newsgroups: sci.electronics.design
Subject: Re: The Spanish Grid Drop-out - recently released information.
Date: Mon, 12 May 2025 14:24:27 -0700
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On 5/12/2025 1:27 PM, piglet wrote:

> 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?

Exactly.  As I said:

    "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."

The networks characteristics /with cogeneration in place/ have to be
remodeled and the dynamics of how those cogenerators are expected
to behave has to be (iteratively) refactored into that model.

If you have lots of *tiny*, independent cogeneration facilities (e.g.,
rooftop solar), all the moreso as each of them can act without
involving others.

What if my system is TAKEN off-line (because I'm having the roof repaired)?
That (those!) abrupt removal of capacity has to be anticipated instead
of some MW plant whose absence can be planned.  Likewise for new capacity
brought on-line haphazardly (yet another rooftop system connected, today!)

You don't have to look at just "now" to make deductions about what
is happening in the network; you can remember what has happened
immediately prior (for some value of "immediately") and adjust
your response based on knowledge of what those observations tell you
about the network at large.  Much the same way that this information
is inertially "stored" in a large mass.