I stopped reading after this, sorry you totally lost me, im blocking this website:
"However, variable renewable sources, such as solar photovoltaic, do not have this capability. They generate direct current which is converted to alternating current at 50 Hertz, but they cannot react automatically to frequency variations. "
Nonsense. Go to any solar installer and ask him about this capability. or go to your roofs PV inverters manual and look up section about inputting "grid parameters".
I'm fairly knowledgeable on this topic, and I disagree that the author is ignorant or malicious. I think he was just trying to "dumb it down" for the masses.
I read quite lot about connecting Ukraine power grid to EU. Small variations in frequency and phase are quite real problem. It is quite a big problem to synchronise large international grids, and tiny PV inverter is really not build to do that!
Plus from manual, most AC inverters have parasitic power factor on AC side. Some part of power inverter sends to grid, can be out of sync junk!
Large spinning turbines with generator, are capable of absorbing out of sync junk to huge extend. But that may put turbine out of phase slightly.
Current power grid was build around huge wheels spinning at the very same frequency.
"However, variable renewable sources, such as solar photovoltaic, do not have this capability. They generate direct current which is converted to alternating current at 50 Hertz, but they cannot react automatically to frequency variations. "
Nonsense. Go to any solar installer and ask him about this capability. or go to your roofs PV inverters manual and look up section about inputting "grid parameters".
Writer is either total ignorant or bad actor.