Do you know why they all turn at the same speed? Because they are spinning at 50Hz,(reply>), Most wind turbines are asynchronous,(reply>), Wind turbines have gearboxes. Doesn't matter what speed the turbines are spinning at, it'll all get turned into 50Hz. In any case, they're probably rotating at the same speed because they're all catching the same windspeed.,(reply>), @waswestkan Ehh, what I was told is that all wind turbines run at the same speed (dynamos running at 3000 RPM) at 50hz output, the actual spinning part appears slower due to it being so big, and thats the reason it doesnt go any faster/slower...,(reply>), Do you understand 50 Hz would be 3,000 RPM?  My understanding is that wind turbines produce "wild AC". Meaning the frequency can be  something other than the  standard grid frequency initially. The wild AC is rectified to DC, and that DC drives inverters to covert the DC-to the voltage and line frequency needed to supply the grid.,(reply>), It's not that the actual blades are spinning at that speed, but they are all in sync and outputting power at 50Hz and so they all spin at the same speed