Resumo

ARANGUREN, D et al. Lightning effects on distribution transformers and reliability of power distribution systems in Colombia. Ing. Investig. [online]. 2015, vol.35, suppl.1, pp.28-33. ISSN 0120-5609.  https://doi.org/10.15446/ing.investig.v35n1Sup.54069.

Failure rates of rural power systems are statistically studied based on lightning parameters and a two-state weather model (normal and adverse). Lightning information is matched with geographical coordinates of 251,024 power transformers in a vast area in Central Colombia. An important portion of transformers present failure rates 45 times higher than normal, and very large overhead lines, representing a high portion of the total system, present very high failure rates over 75 times higher than in normal weather conditions.

Palavras-chave : Power reliability; lightning; weather reliability model; tropical zone.

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