Hey, I've made an observation about the turbines on a local wind farm. I've noticed that, in one instance, two turbines seem to be in sync; but a short time afterwards they get gradually more out of sync, and then become in sync again. Surely, then, if we just consider these two turbines in isolation, the electricty produced will show a beat pattern, since the frequencies must be similar. Shouldn't the all the turbines be made to oscillate at the same frequency, so all the electricity is varying at 50Hz (I'm in the UK)? Or am I not understanding the way the electricity is produced by wind turbines? Thanks in advance for your help!