Algoritmo híbrido e inteligente para o diagnóstico das condições operativas de  transformadores de potência no contexto da qualidade da energia elétrica / Hybrid intelligent algorithm for the diagnosis of operating conditions of power transformers in the context of power quality

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

12/07/2012

RESUMO

This research aimed to develop an algorithm able to diagnose the operating conditions of power transformers. The variables considered to classify the presented conditions were the normally used by differential protection logic, i.e., the differential current and the harmonic content in the signals in analysis. Moreover, the relationship between some phenomena associated to a poor power quality originated from consumers connected to the secondary and reflect to the primary side of the transformer was also verified. In order to infer the relationships above mentioned, the developed algorithm used the Wavelet Transform and artificial intelligence techniques (Fuzzy Logic and Artificial Neural Networks). All the tests applied to validate the proposed methodology were performed making use of the ATP (Alternative Transients Program). In face of the analyzed conditions, the results show that differential currents and undesired harmonic content can arise and the implemented logic will erroneously diagnose the operation condition addressed. The results also illustrate the propagation of these conditions from secondary to primary side of the analyzed transformer.

ASSUNTO(S)

lógica fuzzy e redes neurais artificiais power quality proteção digital de transformadores qualidade da energia elétrica transformada wavelet wavelet transformer digital transformer protection fuzzy logic and artificial neural networks

ACESSO AO ARTIGO

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