The fault characteristic of wind farm is one of the important evidence for its protection setting and configuration. On the basis of describing the set up process of FDIG mathematical model

the expression of short circuit current and supplied by the FDIG and expression of earthing fault short circuit current of wind farm connection line are set up

the influence of such factors as Crowbar control strategy

interconnection number of wind turbine generator

operation wind velocity of wind turbine and reactive power compensation etc. are quantitatively analyzed;on the basis of analyzing main protection configuration and its features of wind farm

the influence of above short circuit current and its main influence factor on the main protection of wind farm configuration are derived and analyzed. Finally

the correctness of above theoretical analysis based on PSCAD/EMTDC platform is simulated and verified with certain1.5MW wind farm in Xinjiang as background.