In order to solve the problem of wind curtailment and poor power transmission ability caused by short-circuit faults in wind farm collection lines

a fault location method for wind farm collection lines based on vector deviation is proposed. According to the electrical information of each terminal measurement device

the objective function of vector deviation between the theoretical calculation value and the real measurement value is constructed by using total vector error(TVE)and total three-phase unbalance. According to the calculation results of deviation degree

the difference between the information of real fault and imaginary fault interval is judged. The imaginary fault interval corresponding to the minimum difference is the real fault interval. PSCAD/EMTDC simulation results show that the proposed method is feasible for different fault locations

different fault intervals and different transition resistances

and can meet the requirements of wind farm for the accuracy of collection line fault location.