Power Quality in Wind Power Systems

Abstract

Wind power generation systems influence power quality in a specific way making important the need for detailed and   accurate   evaluation   of   disturbances   caused   by   wind generators.    Wind    power    system    can    cause    sub-    and interharmonic components to appear in the spectrum of voltages and currents. The  paper  shows  different  aspects  of  spectrum  estimation  in power  systems,  including  the  doubly  fed  induction  generator (DFIG)  connected  to  low  voltage  distribution  grid.  Harmonic distortions  caused  by  wind  generator  under  various  operational conditions regarding wind speed, active and reactive power are shown   and   discussed.   Advanced   spectral    methods   (like ESPRIT)  are  applied  to  overcome  the  drawbacks  of  Fourier-based techniques.