Brian Morrison writes:
I think that the generator is driven by a constant speed drive, the
blade angle being used to control the speed of this drive, and the
output connection (relays perhaps) is not closed until the drive has
been frequency and phase matched with the grid connections. This is
pretty much how a conventional power station does it.


Only on VERY LARGE wind farms. Most small sites rectify the wild AC
and use syncronous inverters to feed back into the grid.

--
Lawrence Statton - m s/aba/c/g
Computer software consists of only two components: ones and
zeros, in roughly equal proportions. All that is required is to
place them into the correct order.