The fault features of outgoing transmission line in DFIG-based wind plant with the capacity of low-voltage ride-through (LVRT) are analyzed. The main frequency inconsistency between voltage and current of wind farm outgoing transmission line leads a serious impact on the action performance of traditional distance protection element based on power frequency voltage and current phasor. The differential equation algorithm based on the time-domain differential equation model of transmission line does not involve the frequency-domain information of the signal, thus it is unaffected by the main frequency inconsistency between voltage and current of wind farm outgoing transmission line. But the high-frequency characteristic of the differential equation algorithm is poor. Compared with the traditional differential equation algorithm, two processes are gained in the equal transfer process-based distance protection, low-pass filtering and re-structuring of the voltage at the fault point, which significantly improves the performance of the algorithm. The PSCAD/EMTDC simulation results show that the distance element which employs the equal transfer process-based distance protection algorithm can trip correctly and quickly while unaffected by the wind power transient voltage and current no matter what kind of fault occurs in the protection scope.