Here is my plan...
Ground wye on Primary side HO (22800)
Float wye on secondary side XO (200VAC)
Float wye on xo of delta/wye iso transformer (delta from inverter side)
All metallic surfaces are bonded back to primary Transformer
Will there be any issue with clearing phase to ground faults...
Here is the entire design...Tell me what you think
2-500Kw Satcon inverters@200vac (no neutral)each supply delta/wye isolation transformer(1:1)go through switchgear and feed utility transformer wye/wye to 23Kv.
we actually had a problem soon after start-up
Contractor hooked up Grounding...
we will be suppling 23kv to the utility through a wye/wye transformer.
Question...Should the secondary(PV)connection xo float or would it be best to connect xoho. My main concern is zero sequence harmonics causing havoc on the transformer and also the ability to clear ground faults.
