The stability analysis method based on impedance is a useful tool for resonance assessment of wind turbine system. For the type-IV wind turbine, this paper presents the accurate admittance models, self-admittance and accompanying-admittance, of the whole wind turbine. The admittance models can capture the characteristics of wind turbine. The effects of dc link capacitor, its voltage control and machine-side converter (MSC) current control on wind turbine admittances are investigated in this paper. Applying the models, the sub-/super-synchronous resonance of wind turbine system can be predicted correctly, whereas it cannot be done by using the simplified models with ignoring the dynamics of dc link and MSC. Admittance models and resonance analysis results are validated through simulation.