Comparação dos níveis de THD entre turbinas DFIG e PMSG na integração de usinas eólicas em situações de falta
Keywords: DFIG, PMSG, FFT, Total Harmonic Distortion, Wind Farm, Electrical Faults
AbstractIn this paper, a comparative analysis of Total Harmonic Distortion (THD) between wind farms with double-fed induction generators (DFIG) and synchronous permanent magnet generators (PMSG) integrated into the grid is developed. The Fast Fourier Transform (FFT) technique to evaluate the output current signal THD in different fault conditions and indicate the best performance among the generators is used. Harmonic generation problems are associated with wind generation, due to the non-linear characteristics of its converters and non-linear loads connected to the grid side. The integration of two 10 MW wind farms with five 2 MW wind turbines is analyzed, using DFIG and PMSG turbines, operating in different fault occurrence scenarios, connected to 25 kV and 120 kV at 60 Hz systems The results show that the PMSG presents better performance, with low THD, compared to the DFIG, for the analyzed cases.