Estimation of zero-sequence impedance of undergrounds cables for single-phase fault location in distribution systems with electric arc
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 i...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2009 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:10256/2594 |
| Acceso en línea: | http://hdl.handle.net/10256/2594 |
| Access Level: | acceso abierto |
| Palabra clave: | 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 |
| Sumario: | 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 |
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