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DETECÇÃO E CLASSIFICAÇÃO DE FALTA EM REDE DE DISTRIBUIÇÃO DE ENERGIA CONECTADA EM GERADOR PV USANDO LÓGICA FUZZY COM IDENTIFICAÇÃO PARAMÉTRICA ONLINE
GOMES, M. C. M.; COSTA JUNIOR, C. T.; AYRES JUNIOR, FLORINDO A. C.; NEVES, C. C
Resumo
Resumo
Currently, energy is seen as an essential product, which is quantified through its characteristics, such as quality, price and accessibility. To this end, research involving power quality and in particular the fault detection in the power grid and especially in the presence of distributed generation, has become more intensive for mapping and correcting its operation. In this view this work presents a novel study of a method for detecting short-circuit faults in electricity distribution networks with the presence of renewable distributed generation sources via converters such as solar photovoltaic. The methodology for fault detection and classification proposed in this work is based on the analysis of parametric ARX (autoregressive with external inputs) models obtained by online parametric estimation via recursive least squares. Additionally, a classification system based on fuzzy logic, in view of the continuous change of these parameters values, classifies short-circuit faults in terms of their severity between line to ground fault, line to line fault, three-phase fault and line two line to ground fault. In order to verify the effectiveness of this proposed methodology, exhaustive tests were carried out in computer simulation applied to a typical electrical distribution network of 3 buses, two feeders and a 250 kW photovoltaic (PV) generator. Finally, the results obtained proved the effectiveness of the proposed method, being a fuzzy classification system that was designed capable of proper determining percentage for classification of the detected fault in terms of its severity.
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palavras-chave
Palavras-chave
short circuit detectionfault classificationpower distribution networksphotovoltaic generationdistributed generationfuzzy classificationARX modelonline parameter estimationrecursive least squarespower qualitysingle-phase grounding faultthree-phase faultline-to-line fault
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Published
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