基于虚拟导纳的双馈风电机组高频谐振主动阻尼控制

The mutual impedance between doubly-fed induc-tion generator(DFIG)system and weak grid may cause a reso-nance,which yields to undesirable distortions and harmonics.The equivalent impedance of DFIG systems is high,which cre-ates high-frequency resonance(HFR)in interaction with weak grids.Although several studies are conducted to mitigate HFRs,more improvements are needed in terms of damping and phase-margin.Accordingly,an active damping control strategy based on virtual admittance is proposed,which properly mitigates the disturbances.The proposed strategy is accurate as it considers the dynamic high-frequency model of DFIG system to effective-ly reduce the HFR.The performance of the proposed strategy is verified by using different case studies on a 2 MW DFIG sys-tem with time-domain simulations in MATLAB/Simulink envi-ronment.