Computing transient voltages on grounding grids buried in homogeneous and stratified soils

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual de Campinas (UNICAMP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorDe Araujo, Anderson R.J.-
Autor(es): dc.creatorDe Azevedo, Walter L.M.-
Autor(es): dc.creatorFilho, Jose Pissolato-
Autor(es): dc.creatorColqui, Jaimis Sajid Leon [UNESP]-
Autor(es): dc.creatorKuroakawa, Sergio [UNESP]-
Data de aceite: dc.date.accessioned2022-08-04T22:09:20Z-
Data de disponibilização: dc.date.available2022-08-04T22:09:20Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2020-09-28-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1109/TDLA47668.2020.9326186-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/221672-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/221672-
Descrição: dc.descriptionGrounding grids (GGs) are essential to guarantee protection to personnel and equipment in the electrical substation. In this context, GGs provide low impedance path to high currents during faults or lightning strikes to minimize the step and touch voltages. Several models to compute the impedance of the GG are presented in the literature combining distributed and lumped approach. In this paper, a lumped approach is developed to represent a GG composed by vertical (VEs) and horizontal electrodes (HEs). Electrodes are modelled individually by lumped models and implemented at the ATP-EMTP software. The grounding impedances of the VEs buried in a stratified soil are calculated by the quadripole approach and an electric circuit is obtained by the Vector Fitting technique. The HE representation is based on the electromagnetic radiation theory, where each segment of the conductor can be seen as a current-carrying conductor. Simulation results compared with the traditional models in the literature indicate a good performance of the lumped representation of the HV and VE for a frequency range that varies from 100 Hz up 10 MHz. Additionally, results have shown that when VES are inserted in GGs and another layer of soil is considered, the GPR and node voltages are significantly reduced.-
Descrição: dc.descriptionUniversity of Campinas Department of Systems and Energy-
Descrição: dc.descriptionSão Paulo State University Department of Electrical Engineering-
Descrição: dc.descriptionSão Paulo State University Department of Electrical Engineering-
Idioma: dc.languageen-
Relação: dc.relation2020 IEEE PES Transmission and Distribution Conference and Exhibition - Latin America, T and D LA 2020-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectElectrodes-
Palavras-chave: dc.subjectElectromagnetic transients-
Palavras-chave: dc.subjectGrounding grids-
Palavras-chave: dc.subjectStratified soil-
Título: dc.titleComputing transient voltages on grounding grids buried in homogeneous and stratified soils-
Aparece nas coleções:Repositório Institucional - Unesp

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