Doubly-fed induction generator (DFIG) is gradually replacing synchronous generator and squirrel-cage induction generator in the practical application both at home and abroad, and due to the random fluctuations of wind resources, it brings a big impact to the voltage and reactive power of the distribution network. Considering the reactive power output characteristics of doubly-fed wind generator, the application of SVG in stabilizing node voltage and reactive power control is discussed in detail and key technical points of static var generation (SVG) when connected to distribution network is studied, including control structure model, capacity selection and key parameters determination. With the simulation of IEEE9 distribution network in PSCAD, the effectiveness and feasibility of the proposed method are verified, providing a theoretical and practical value for the widely application of DFIG in the distribution network.