Abstract: With increase of the grid connection proportion of various power electronic equipment such as wind power,photovoltaic and SVG,the oscillation risk of the power system with renewable energy has intensified. Accurate positioning of the oscillation sources in the wind farm is of great significance to prevent large-scale power accidents caused by oscillation. An online location method of oscillation source in a hybrid wind farm based on frequency domain contribution factor analysis is proposed. First,based on large-scale hybrid wind farms,frequency domain contribution factor is deduced by nodal admittance matrix. Second,the impedance characteristics of the wind farms are obtained through online impedance identification which is suitable for engineering realization. Third, the impedance characteristics of the wind farm are obtained through online impedance identification, which is convenient for engineering implementation,and the leading oscillation mode of the wind farm is obtained through modal mechanism analysis.Then,the oscillation contribution factor of the hybrid wind farm is calculated; based on the contribution factor, the main contribution nodes of the oscillation in the wind station are determined to realize the location and quantitative analysis of the oscillation source;the mechanism analysis is used to replace the numerical method to obtain the dominant oscillation mode of the wind farm station, which avoids the problems of large calculation amount and insufficient convergence. Finally,based on the ADPSS/ETSDAC,the proposed method is validated by simulation of the interactive oscillation between the DFIGs and the series compensation capacitor and the interactive oscillation between PMSGs and SVG in large-scale hybrid wind farm.