A Question for Engineers

[John Arton]

I was watching a BBC Drama, Cobra, where a massive solar flare knocks out all electrical power and in the U.K. they have to install new massive transformers to get the National Grid up and running again. Plenty of poetic licence taken with many scenes etc. but is was an interesting drama.
My question for engineers is,
In port or drydock then shore power is connected, if the vessel is drawing its electrical current from the shore, i.e. the national grid, is it possible for once the ships generators are up and running is it possible for excess electrical current to be fed back into the national grid via the shore power connection?
Just a query.
rgds
J.A.

[vic mcclymont]

John, technical it's possible, but the grid protection systems and connection are very stringent and very different from the Marine industry.
When I worked for IBM, we had five 500kw alternators, which were only allowed to parallel and run in synch. with the grid for a few seconds, before the grid dropped out, or the reverse if transferring back
Vic