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:
>
>

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.
>
>

 
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.