Study on reactive power capacity of doubly-fed induction generator

For voltage issue led by large-scale wind farm interconnection into grid. Firstly, power relation of doubly-fed induction generator (DFIG) is analyzed. Further static DFIG model is established. Based on this, a method for analyzing reactive power regulation volume with DFIG operation constraint, static stability and grid code is proposed. By simulation, the result shows that the method is right and can support reactive power regulation of DFIG according to different constraints.