Skip to Main Content
In this study a separately excited DC machine drive is used to emulate the mechanical drive train of a wind power station with a doubly-fed induction generator under real conditions. The static and dynamic characteristics of the wind turbine are modelled through a 3-mass oscillating system, representing the turbine, the gear box and generator moment of inertia connected by elastic shafts. This model is implemented within a software environment and generates the reference values of torque and speed to drive the DC-machine. The fluctuations of the wind speed excite the system modes and oscillations with the resonance frequencies are generated. These effects are transmitted through the DC-machine drive to the generator shaft, enabling more realistic conditions for the experimental rig. This paper shows the modelling of the system and construction of the experimental rig, as well as experimental results.