PSIM Modeling of Wind Turbine Generators

Hi,

I am currently modeling a wind turbine system feeding a permanent magnet synchronous generator(PMSG). I'm using Psim version 8.0 and so far I've been having problems with interfacing my input electrical quantity with the generator shaft. Now I'm being told that the input to the shaft should be a current quantity to signify the torque. So far I had tried modeling the power and torque quantities as voltage parameters.Can someone tell me what is the right approach to this simulation? And if i have to use current quantities,do I model the wind speed profile as a current value?