Re: Grand Apagon - Electricity (not) in Spain

On 5/1/25 4:06 AM, Jeroen Belleman wrote:

On 5/1/25 12:24, Liz Tuddenham wrote:

Chris Jones <lugnut808@spam.yahoo.com> wrote:
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>

There is nothing magic about the current from a rotating generator that
cannot be exactly replicated by an inverter ...

>
Inertia.  Not magic but physics.   A store of energy that can be drawn
on instantly for several seconds.  Only an inverter with a massive
energy storage system could match that; domestic systems can't.
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>

 I'm convinced it's becoming necessary for small domestic systems
to servo the injected power to the grid frequency, just as is done
for large power plants. There is no need for massive storage; Each
contributes what he is able to. I *do* think the dP/dF will need to
be adjusted by some central authority to keep a stable system.
 Jeroen Belleman

In California and many other states it is required that residential solar inverters adhere to Rule 21 (aka UL 1741).
They have some simple rules that are intended to stabilize the grid where there are significant amounts of solar power.
Below 60Hz and 245V the inverters are not restricted but as the frequency or voltage rises above the thresholds the inverters will curtail their output.
As there is no energy storage in the inverters it is not possible to go further and take power from the grid.
As yes there are no similar rules for systems with batteries but it could easily be implemented even in residential photovoltaic systems.
Processing complexity is not likely to be an issue as even micro-inverters have their own processor in general with internet link.
Typically some form of Powerline communication is used to communicate from the inverter/s to a gateway that has the internet connection.