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Power Quality Problems Caused by Termites on 138-kV Underground Cables
Problemas de calidad de energía causados por termitas en cables subterráneos de 138kV
DOI:
https://doi.org/10.15446/ing.investig.v31n2SUP.25226Keywords:
Transmission systems, termites, underground cables (en)Sistemas de Transmisión, Termitas, Cables Subterráneos (es)
This paper discusses problems found in the operation of underground cables in the transmission system of CEMIG, with emphasis on insulation failures caused by termites. This problem has been the source of many scheduled and non-scheduled interruptions in later years, leading to significant maintenance costs. Experience with current practices designed to detect and prevent this failure mode is described. It is argued that new procedures are needed for improved on-line, pre-failure detection. Test improvement will hopefully contribute to increase the lifetime of underground cables currently in use, as well as to reduce maintenance costs.
Este artículo discute problemas encontrados en la operación de cables subterráneos en los sistemas de transmisión de CEMIG, con énfasis en las fallas de aislamiento causadas por las termitas. Problema que ha sido la fuente de muchas interrupciones programadas y no programadas en los últimos años, llevando a significantes costos de mantenimiento. Experiencias con las prácticas corrientes planeadas para detectar y prever este modo de falla esta descrito en este trabajo. Se establece que nuevos procedimientos son necesarios para mejorar durante el funcionamiento, la detección prefalla. La mejora de pruebas se espera que contribuya tanto a aumentar la vida útil de los cables subterráneos en operación, como a reducir los costos de mantenimiento.
References
CEMIG's Maintenance Reports 1986 - 2011 (restricted access document).
Fonseca, R.F. ''Detecção de Falha na Capa Protetora de Cabos Isolados de 138 kV'' (in portuguese), Monograph, Curso de especialização em sistemas elétricos de potência (CESEP), Universidade Federal de Minas Gerais (UFMG), 2007.
PIRELLI, (Cabos para Alta e Altíssima Tensão), Catálogo 15-A, 1968.
Rocha, P. E. D. ''Modelagem de Cabos Subterrâneos e Submarinos para Estudos de Transitórios'' (in portuguese), Master's degree dissertation, COPPE, Federal University of Rio de Janeiro, 2007.
Taihan Electric Wire, (Catalogue of Oil Filled Cable and Accessories). Available: http://www.taihan.com (URL).
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Copyright (c) 2011 Romeu Fuscaldi, Fernando H. Silveira, Alberto De Conti, Silvério Visacro
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