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

On 5/12/25 2:47 PM, Martin Brown wrote:

On 12/05/2025 18:35, john larkin wrote:

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 They are all connected to the national grid. The grid frequency target and voltage is extremely well known and all that is needed is for each unit that can to try and drive the grid voltage and frequency towards that target. Things get iffy when they drop out a lot of stuff all at once because they are using the same rules and rapid collapse follows.
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That's what the California RUle 21 for Solar Inverters attempts.
As the frequency rises above 60Hz the inverter linearly reduces its power output to assist in grid stability. Similar actions apply as the voltage increases. There are additional rules for how the unit is to reconnect after a grid failure.
Future versions of the rules will include remote monitoring and control but currently they are purely based on local grid frequency and voltage.
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