Re: Grand Apagon - Electricity (not) in Spain

On 4/05/2025 1:12 am, john larkin wrote:

On Sat, 3 May 2025 14:24:07 +0200, "Carlos E.R."
<robin_listas@es.invalid> wrote:
 

On 2025-05-02 12:03, Martin Brown wrote:

On 01/05/2025 18:41, Bill Sloman wrote:

On 2/05/2025 2:21 am, Liz Tuddenham wrote:

Bill Sloman <bill.sloman@ieee.org> wrote:
>

On 30/04/2025 7:59 pm, Liz Tuddenham wrote:

Bill Sloman <bill.sloman@ieee.org> wrote:

<snip>

It seems that solar panels and wind farms mostly have the type of
inverter that follow the shape of the voltage already in the grid, with
detection to bail out if things go nuts. There is the suspicion that
this was at least part of the problem.
>
But there is another type of inverter that forces the shape, ie,
simulate inertia.

 Where do they get the energy from?

Solar panels and wind farms collect energy from sun and wind. To "force the shape" of the output waveform you might need a single cycle's worth of energy in a short term store, such as a capacitor.
The distinction between a capacitor, a super-capacitor and a battery is essentially how long the energy is stored - you can store more energy per unit volume as you move towards the battery end of the series. The internal resistance goes up along the same axis.
--
Bill Sloman, Sydney