Estimação relativa de tempo de vida de transformadores de distribuição, considerando cargas não lineares
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2014-07-29
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Universidade Federal de Goiás
Resumo
Electricity customers’ devices, connected to the secondary distribution network linked
to distribution transformers belonging to the electrical energy distributor, modernize every
year. These devices usually consist of components capable of processing energy and produce
distortion at the load current. Thus these devices are typified as non-linear load and its effects
influence the operation of the distribution transformers with implications for its lifetime.
Therefore, this work presents the study of the influence of non-sinusoidal signals (distorted
signals) in the lifetime of distribution transformers. In this sense equations are presented that
allows to calculate transformers losses, their operating temperatures and estimate the
percentage loss of life. To obtain results a computer program was developed in the numerical
programming platform MATLAB based on the presented mathematical model. The developed
program is supplied by data obtained from field as well as laboratory measurements. Results
are also obtained by simulations. The focus of this study is the distribution system of the
urban perimeter of the city Goiânia-GO.
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Citação
SANTO, A. M. Estimação relativa de tempo de vida de transformadores de distribuição, considerando cargas não lineares. 2014. 213 f. Dissertação (Mestrado em Engenharia Elétrica e da Computação) - Universidade Federal de Goiás, Goiânia, 2014.