Abstract:The relationship between impedance and distance of power traction network with series compensators is notmonotone in the electric traction network of electrified railways. The conventional method of fault location fails because therewillbe two ormore faultpoints corresponding to an actual fault. A newmethodwasproposed based on analysison the faultmodelofelectric traction networkwith series compensators. ATP (alternative transients program) simulation programmed withMATLAB on different faultphase angles and transient resistances indicates that the method is able to identify the position relative to the series compensators. The algorithm was presented to help users to apply the proposedmethod by looking up a table containing the criteria.