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Title:	Estimation of zero-sequence impedance of undergrounds cables for single-phase fault location in distribution systems with electric arc
Author:	Herraiz Jaramillo, Sergio; Meléndez i Frigola, Joaquim; Barrera Núñez, Víctor Augusto; Sánchez, Jorge; Castro, M.
Abstract:	This paper focus on the problem of locating single-phase faults in mixed distribution electric systems, with overhead lines and underground cables, using voltage and current measurements at the sending-end and sequence model of the network. Since calculating series impedance for underground cables is not as simple as in the case of overhead lines, the paper proposes a methodology to obtain an estimation of zero-sequence impedance of underground cables starting from previous single-faults occurred in the system, in which an electric arc occurred at the fault location. For this reason, the signal is previously pretreated to eliminate its peaks voltage and the analysis can be done working with a signal as close as a sinus wave as possible
Publication date:	2010-06-15
Subject(s):	-Corrents elèctrics -Energia elèctrica -- Distribució -- Alta tensió -Errors de sistemes (Enginyeria) -- Localització -Impedància (Electricitat) -Electric currents -Electric power distribution -- High tension -Impedance (Electricity) -System failures (Engineering) -- Location
Rights:	Tots els drets reservats
Document type:	Article
Published by:	IEEE
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