1 or 2 arrays grid-tied to different utility transformers & lightning damage
I'm looking at a PV install at a farm which currently has two utility services from two different transformers. I am considering a large PV array and in order to prevent the upgrade of either transformer, half of the array would feed one transformer and half would feed the other transformer. What makes me concerned about this is that the two transformers are connected to the distribution line from different places (300' apart). Thus the array's grounding would create an conductive loop about an acre in area. I'm concerned that this large area would create an 'antenna' that would induce catastrophic voltages in the event of any nearby (or possibly even distant) lightning. Even if the arrays were separated by 10' or so and grounded separately, they are still on the same metal roof, so the metal roof would provide the connecting conductive loop. Does anyone have experience with this sort of problem?
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