pv single phase system

[bunda222]

Hey guys

is that possible to connect a single-phase pv system to a three-phase grid? If yes, how will it work? I mean, it can only be connected neutral-phase or between two phases. Will it supply only single phase load? And the surplus energy, does it can be delivered to the grid? Will it introduce any phase unbalance?

 

[davidbeach]

The bulk of the load is also single phase-neutral connected. The PV is just a bit of negative load. As long as things are kept relatively well balanced it won't be a problem.

 

[SparkyAt10]

Really depends on the system. If you are in the US on a residential 120/208V large utility service it isn't a big deal for a reasonable portion of the load; same would go for a European 230V system. You get into problems if you are connecting it downstream of a small (relative to the PV) 3-phase isolation transformer, as you will cause substantial imbalance.

My gut feeling is that you would be better off connecting line-line rather than line-neutral if there are any three-phase motors, but that could have a host of challenges as well.