Abstract: The fault characteristics of transient phase currents should be fully captured and analyzed for fault phase, fault feeder and fault section identification in new-type distribution system integrated with renewable energy sources. To solve this problem, the transient distribution characteristics of phase currents in new-type distribution system are analyzed when single-phase-to-ground fault occurs, and a novel method of single-phase-to-ground fault section location in new-type distribution system is proposed and discussed. The proposed method is realized by using the difference of multidimensional time-frequency distribution characteristics of phase currents. According to the difference between the fault transient quantity of the fault phase current and that of the healthy phase current, the fault phase selection is completed by the grey correlation algorithm. The 26-dimensional multidimensional time-frequency features are extracted from the faulty phase current transient waveforms of the monitoring points at the beginning of each outlet and the branch monitoring points of the fault feeder. The VTSNE is used to screen and reduce the dimension, and the processed feature data are subjected to DBSCAN to complete fault line selection and fault section location. This method is verified in a 10 kV new-type distribution system in some seaport, which satisfies the adaptability under different fault initial phase angles and different transition resistance faults, and is not limited by the sampling synchronization rate of monitoring points.