Hi, im currently working on a year placement between my 2nd and 3rd years at university. I'm working at RWENpower in swindon, UK and goto Coventry University in the Midlands. I have a couple of questions about the industry and certain technical issues. 1. Im currently looking at windfarm single line diagrams and confused about voltages from wind turbines. Do the voltages add up along the array? if so, then do tap changers on the primary coil of the transformer make up for the lack of voltage (say, 10 turbines output 500V each = 5kV, on a 33kv/132kV transfomer, does the 33kV derate itself or a combination of both tap changers on both sides of the transformer) 2. When the wind blows at different speeds, surely a variable frequency is output from the wind turbine, how is this changed to grid frequency standards. 3. Lastly, if each wind turbine on one particular array is outputting a slightly different frequency, then how do they interact with each other and how is the electrical signal cleaned up? Your help is appreciated.