Is CYMgrd or ETAP able to model the interconnection of a solar PV farm earthing grid interconnected with its interconnect substation earthing grid?
The issue is that when injecting the short-circuit currents from the substation into the earthing grid of the PV plant, it does not support it...
We are involved in a 90 MW PV in construction project. The interconnect station (33/132 kV) is exactly as those shown in IEEE 2778, neighboring the PV farm.
The GPR is quite high (about 8 kV) at substation due to several reasons, as 22 kA short circuit power, quite small switch yard (40x45 m)...
