Why there’s a required gap separating wind turbines? Ayrshire, Scotland, 28 December 2023 during storm Gerrit a wind turbine lost its wings as result of overspeeding during strong wind. The debris was flying at hundreds of meters.
Last year there was a similar case in South Wales and it came out that wind turbine needs electricity to turn its wings into a neutral position. If power is cut off, the turbine is unable to go neutral and this may result in such overspeeding and ultimately breaking the wings by inertial force or, as it happened in South Wales, collapsing of the tower.
To be fair, it needs electricity but doesn't need grid power. (Though I'd still expect the whole setup to be backdriveable and actively held so that wind would turn it to neutral on power loss.)