Integrated Use of Time-Frequency Wavelet Decompositions for Fault Location in Distribution Networks: Theory and Experimental Validation

The paper presents a procedure for fault location in distribution networks. The proposed procedure is based on the analysis of electromagnetic transients associated with faultoriginated travelling waves. The analysis is carried out by means of the integrated time-frequency wavelet decomposition that improves the identification accuracy of specific frequencies associated with the faulted branch and the fault location. In order to validate the proposed procedure, the voltage measurements obtained during several fault tests in a reduced scale setup reproducing a distribution network feeder are used. The paper illustrates the performance of the proposed procedure when applied to the recorded fault transients in a real distribution network.