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Ariel L. Damião
Departamento de Engenharia Elétrica, Unidade de Ensino Superior de Feira de Santana. Av. Luís, Av. Eduardo Magalhães Subaé - Aviário, Feira de Santana - BA, 44079-002
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Reginaldo B. G. Grimaldi
Departamento de Engenharia Elétrica, Unidade de Ensino Superior de Feira de Santana. Av. Luís, Av. Eduardo Magalhães Subaé - Aviário, Feira de Santana - BA, 44079-002
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Márcio da S. P. Bove
Departamento de Engenharia Elétrica, Unidade de Ensino Superior de Feira de Santana. Av. Luís, Av. Eduardo Magalhães Subaé - Aviário, Feira de Santana - BA, 44079-002
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Flávio C. T. Maia
Departamento de Engenharia Elétrica, Unidade de Ensino Superior de Feira de Santana. Av. Luís, Av. Eduardo Magalhães Subaé - Aviário, Feira de Santana - BA, 44079-002
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Tarso V. Ferreira
Programa de Pós-Gradução em Engenharia Elétrica da Universidade Federal de Sergipe – PROEE/UFS Av. Marechal Rondon, s/n, Jd. Rosa Elze, São Cristóvão/SE
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Wellinsílvio C. dos Santos
Centro de Tecnologia da Universidade Federal de Alagoas Grande – CTEC/UFAL Campus A.C. Simões - BR 101 Norte - Km. 14 - Tabuleiro do Martins - Maceió/AL
Keywords:
High Impedance Faults, Wavelet Transform, Linear Predictor
Abstract
Against with several disturbances that affect the distribution system, High Impedance Faults (HIF) are considered one of the biggest problems faced by electricity supply concessionaires. This phenomenon occurs when the primary conductor comes into contact with a high impedance surface, generating fault currents with low amplitudes. In this way, the currents coming from a HIF, cannot sensitize conventional protection devices that are driven by overcurrent’s. However, this type of fault evidences peculiar characteristics in the current signals and, therefore, through the characteristics, this present work has as main objective to develop an algorithm capable of detecting as HIF, through the junction of the Wavelet Transform (TW) with the Linear Predictor (PL) defaults on typical fault currents signals, using a test system model of um Brazilian electric power utility, varying the contact surfaces, buses and their respective loads, showing promising results in the detection of HIF.
