Abstract:A transient line selection method in resonant earthed distribution network based on EEMD is proposed.Extract 1/4 period transient zero sequence current of each line as the data window length, decompose the 1/4 period transient zero sequence current with EEMD into a finite number of intrinsic mode function components IMF and a remaining components r.Do correlation analysis of the IMF component of each line with the original signal, select three IMF component as the characteristic IMF component which their correlation coefficient is the first biggest,calculate characteristic IMF components and residual energy as the inherent mode energy of a line.Calculate intrinsic mode energy weighting coefficient of each line,select the fault line by comparing the size of the energy weighting coefficient. In order to determine the bus fault, choose the first three lines which their energy weighting factor are biggest for further comparison. The method use the transient signal, not influenced by arc suppression coil, applying to the neutral point grounding and resonant grounding distribution network at the same time,can also applying to high resistance grounding fault and small Angle ground fault.MATLAB simulation verify the validity of the method.