摘要: Under the influence of the skin effect and the electromagnetic coupling between multiple conductors inside the cable, the distribution parameters of the cable shows frequency variation and high non-linearity, which makes it more d... 展开 Under the influence of the skin effect and the electromagnetic coupling between multiple conductors inside the cable, the distribution parameters of the cable shows frequency variation and high non-linearity, which makes it more difficult to describe the broadband impedance. The current impedance model of direct drive permanent magnet synchronous generator does not consider the effects of submarine cables impedance. In this paper, we (1) establish the impedance model of grid side converter, (2) extract distribution parameters of cable based on the COMSOL-MATLAB co-simulation platform, and (3) analyze the influence of cable distribution parameters on wideband impedance characteristics of the wind power converter. The results show that the electromagnetic coupling between conductors mainly affects the cable distributed inductance and enhances the negative damping characteristics. After considering the distribution parameters, the submarine cable impedance presents multi-resonance characteristics. The longer the length is, the more obvious the multi-resonance characteristic will be, and the worse the broadband impedance characteristic of wind power converters connected to weak power grids will be. 收起