Damping of Forced Oscillations Caused by Wind Power

This paper investigates the issue of forced oscillations caused by wind power fluctuations and their damping by standards power system controls. The purpose is twofold: First, we study the difference between variable-speed and fixed speed wind turbine generators in inducing forced oscillations and causing resonance. Second, we demonstrate how standards power system controls can damp these forced oscillations and avoid the resonance in power systems. Modal analysis, frequency domain analysis and general forced oscillation mechanism (GFO) are performed to study this issue. The study is applied on four-machines two areas power system. The results demonstrate that power system controls damp forced oscillations and shift the frequencies of these oscillations far away from the dominant frequency band of wind power generation.