Practical Experiences and Mitigation Methods of Harmonics in Wind Power Plants

This paper discusses practical experiences and mitigation methods of harmonics in wind power plants. Traces obtained from harmonic measurements of actual wind turbines are presented for the type 3 and type 4 turbines, and the harmonic performances of these wind turbines are elaborated on. Simulation case studies obtained from the harmonic analysis of various practical wind power plants are presented. The case studies presented include both resonance and nonresonance conditions. Finally, practical harmonic mitigation techniques including harmonic filtering and harmonic compensation are discussed.