Borghetti, A.Bosetti, M.Nucci, C. A.Paolone, M.Abur, A.2012-05-012012-05-012012-05-01201010.1109/TPWRD.2010.20466552-s2.0-77956990096https://infoscience.epfl.ch/handle/20.500.14299/79905The paper presents a procedure for fault location in distribution networks, based on the use of the integrated time-frequency wavelet decompositions of the voltage transients associated with the fault-originated travelling waves. The proposed analysis of time-frequency wavelet decompositions has been found to improve the identification accuracy of the frequencies associated to the characteristic patterns of a fault location with respect to a sole frequency-domain wavelet analysis. Several laboratory fault tests, carried out by means of a reduced-scale model of a distribution feeder, are used to illustrate the characteristics and assess the performances of the proposed improved procedure. The paper also illustrates the application of the proposed procedure to a transient, originated by a permanent phase-to-phase fault, measured in a real distribution network in which a post-test analysis has identified the faulted branch. © 2010 IEEE.Continuous wavelet transformdistribution networksfault locationfault transientspower qualityDistribution feedersDistribution networkExperimental validationsFault testsFrequency domainsIdentification accuracyPhase to phase faultsPost-test analysisReal distributionScale modelsTime frequencyTravelling wavesVoltage transientsDistributed parameter networksTime domain analysisTransientsWavelet analysisWavelet decompositionFrequency domain analysisepfl-smartgridstext::journal::journal article::research article