Performance analysis of a digitally controlled wind turbine emulator

This paper presents a digital control scheme for wind turbine emulator. The wind turbine is emulated with a separately excited dc motor. The controller is considered to be in the proportional-integral (PI) form, and is designed in digital time domain. These digital PI controllers are employed here for both speed and current controls. The performance of the digital control scheme proposed is simulated in MATLAB-SIMULINK environment considering the dc motor to be a continuous-time plant. The digital controllers are shown to exhibit successful tracking of the speed reference command. The veracity of the simulation results are established through real-time implementation of the digital control scheme for the dc motor under consideration. The digital control is implemented here with a digital signal processor (DSP) control board dSPACE1104. The experimental results are found out to be in good agreement with that obtained in simulation.