Question to renewable energy experts?
I now read multiple times that the reduced inertia(*) of renewable energy production poses a risk for grid stability. And I don't get it
Doesn't inertia cut both ways? While the inertia of classical turbine generators are helpful in case of an under-frequency, it is decremental in case of an over-frequency of the grid?
(*)
Let's explain some terms
The electrical grid is unique in comparison to other networks in the fire that it always has to balance generation and use of electricity.
If this balance isn't met the frequency, in Europe 50 Hz changes. If the demand exceeds the generation the frequency lowers, if generation exceeds demand the frequency rises. The idea of inertia is that the classical turbine based generation always has the rotating mass of the turbines which can't instantly be stopped. Meaning energy generation can only slowly change
@VQuaschning can you explain?
I found
https://www.youtube.com/watch?v=fUWRyhsutL8 to be a quite good explanation video on the general working of the electrical grid
