I'm reading about integrating PV into legacy grids, and I saw the following scheme:
Left side is middle voltage grid, and right side is low voltage grid (400V AC). It is talking about communication between PVs about stabling the inductive power, but if both feed in with the same frequency and in-phase, what communication do they need to have? What could be the problems in such a configuration?
This image is taken from "Aufnahmefähigkeit von Niederspannungsverteilnetzen für die Einspeisung aus Photovoltaikkleinanlagen" by Georg Kerber