Analysis of Grid-Connected Oscillation Characteristics of Offshore Wind Power Based on Impedance Model

The interaction between DPMSGs and AC/DC power grids is complex and changeable, which can easily cause broadband oscillations in the system. Impedance analysis has been widely used in power system broadband oscillation analysis in recent years due to its clear physical meaning and other characteristics. This paper first conducts impedance modeling on DPMSGs and verifies the accuracy. Then the stability analysis and calculation formula of impedance sensitivity are given. Finally, the impedance sensitivity of the control parameters of the grid-side converter of the direct-drive wind turbine is discussed.